PowMr POW-LVM3K-24V 3000W Solar Inverter Pure Sine Wave Power Inverter User Manual
- June 9, 2024
- PowMr
Table of Contents
POW-LVM3K-24V 3000W Solar Inverter Pure Sine Wave Power Inverter
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the following is the text from the user manual / instructions:
Important Safety Instructions
Please save these instructions for future use!
Read all of the instructions and cautions in the manual before beginning the
installation !
Important Safety Instructions
Installation and wiring must comply with the Local and National Electric Codes
(NEC) and must be done by a certified technician.
Do NOT disassemble or attempt to repair the inverter. There are no serviceable
parts for this inverter.
DO NOT parallel this device with other AC input sources to avoid damage. DO
NOT attempt to touch the unit while it is operating as temperatures will be
very
hot. In addition, do not open the terminal cover while the unit is in
operation. Make sure all connections going into and from the inverter are
tight. There may be
Table of Contents
Important Safety Instructions …………………………………………………………………………… 1 General
Information …………………………………………………………………………………………. 3
General Information
Key Features
1.Full digital voltage and current double closed loop control, advanced SPWM
technology, output of pure sine wave.
2.Two output modes: mains bypass and inverter output; uninterrupted power
supply. 3. Available in 4 charging modes: Only Solar, Utility Priority, PV
Priority, Utility & Solar
hybrid charging. 4. Advanced MPPT technology with an efficiency of 99.9%.
5.Designed with a LCD screen and 3 LED indicators for dynamic display of
system data
and operating status. 6. Manual ON/OFF switch controlling AC output. 7.Power
saving mode available to reduce empty load loss. 8. Intelligent variable speed
fan to efficiently dissipate heat and extend system life. 9. Lithium battery
activation by PV solar or mains, allowing access of lead-acid battery
and lithium battery. 10.Complete protections, including short circuit
protection, over voltage and under
voltage protection, overload protection, reverse protection, etc.
Photovoltaic Modules (PV): convert light energy into DC power, charge the
battery through the solar inverter charger, or directly reverse into
alternating current to power the load.
Power or generator (Utility): Access at the AC input can power the load and
charge the battery. If you do not have a power supply or generator, the system
can also operate normally, where the load is supplied by batteries and
photovoltaic modules.
Battery: The role of the battery is to ensure the normal use of electricity
for the system load when the solar energy is insufficient and there is no
electricity.
Household load: Can be accessed to a variety of household and office loads,
including refrigerators, lamps, televisions, fans, air conditioning and other
AC loads.
Battery Charging Modes: The solar inverter will have 4 operational charging
modes which changes the logic as how and when to charge the battery banks. The
solar inverter has four charging modes: PV priority, Utility Priority, Hybrid
Charging, and Only Solar Charging.
PV Priority In PV Priority mode it will make full use of the solar input
during the day in order to charge the battery bank. This effectively allows
using the unit off-grid during peak utility times in order to cut costs on
utility charging. Only when solar fails to start or is interrupted will the
unit automatically switch to utility mode for backup.
Important Safety Instructions
Please save these instructions for future use!
Read all of the instructions and cautions in the manual before beginning the
installation !
Important Safety Instructions
Installation and wiring must comply with the Local and National Electric Codes
(NEC) and must be done by a certified technician.
Do NOT disassemble or attempt to repair the inverter. There are no serviceable
parts for this inverter.
DO NOT parallel this device with other AC input sources to avoid damage. DO
NOT attempt to touch the unit while it is operating as temperatures will be
very
hot. In addition, do not open the terminal cover while the unit is in
operation. Make sure all connections going into and from the inverter are
tight. There may be
sparks when making connections, therefore, make sure there are not flammable
materials or gases near installation. Installing breakers or fuses outside of
the unit is recommended. After installation, check that all line connections
are tight and secured. Do NOT let the positive (+) and negative (-) terminals
of the battery touch each other. Use Lithium batteries or deep cycle Sealed
Lead Acid, Flooded, Gel, AGM batteries. Explosive battery gases may be present
while charging. Be certain there is enough ventilation to release the gases.
Be careful when working with large lead acid batteries. Wear eye protection
and have fresh water available in case there is contact with the battery acid.
Over-charging and excessive gas precipitation may damage the battery plates
and activate material shedding on them. Too high of an equalizing charge or
too long of one may cause damage. Please carefully review the specific
requirements of the battery used in the system.
Table of Contents
Important Safety Instructions …………………………………………………………………………… 1 General
Information …………………………………………………………………………………………. 3
Key Features ………………………………………………………………………………………………. 3 Battery Charging Modes
……………………………………………………………………………….. 4 Load Output Working Modes
…………………………………………………………………………. 7 Product Overview
……………………………………………………………………………………………. 8 Dimensions
…………………………………………………………………………………………………….. 9
Installation…………………………………………………………………………………………………….. 10 Location
Recommendations ………………………………………………………………………… 10 Wiring
………………………………………………………………………………………………………. 12 Battery
Wiring……………………………………………………………………………………………. 13 PV
Wiring………………………………………………………………………………………………….. 14 AC Output
Wiring……………………………………………………………………………………….. 15 AC Input Wiring
…………………………………………………………………………………………. 16 Communication
Ports…………………………………………………………………………………….. 17 Dry
Contacts……………………………………………………………………………………………… 17 RS485
………………………………………………………………………………………………………. 17 USB
…………………………………………………………………………………………………………. 17
Operation………………………………………………………………………………………………………. 18 LCD Operation
…………………………………………………………………………………………… 18 LCD Menu Screens
…………………………………………………………………………………….. 22 LCD Programmable
Features………………………………………………………………………….. 23 Electronic Protections
……………………………………………………………………………………. 29 Fault Codes
…………………………………………………………………………………………………… 30 Maintenance
………………………………………………………………………………………………….. 31 Technical Specifications
………………………………………………………………………………… 32 Non-Lithium Battery
Parameters…………………………………………………………………… 34 Lithium Battery Parameters
…………………………………………………………………………. 35 Charging Parameters
Glossary……………………………………………………………………….. 36
General Information
Pow series is a new hybrid solar charge inverter, which integrates solar
energy storage & means charging energy storage and AC sine wave output. Thanks
to DSP control and advanced control algorithm, it has high response speed,
high reliability and high industrial standard. Four charging modes are
optional, i.e. Only Solar, Mains Priority, Solar Priority and Mains & Solar
hybrid charging; and two output modes are available, i.e. Inverter and Mains,
to meet different application requirements. The solar charging module applies
the latest optimized MPPT technology to quickly track the maximum power point
of the PV array in any environment and obtain the maximum energy of the solar
panel in real time. Through a state of the art control algorithm, the AC-DC
charging module realizes fully digital voltage and current double closed loop
control, with high control precision in a small volume. Wide AC voltage input
range and complete input/output protections are designed for stable and
reliable battery charging and protection. Based on full-digital intelligent
design, the DC-AC inverter module employs advanced SPWM technology and outputs
pure sine wave to convert DC into AC. It is ideal for AC loads such as
household appliances, power tools, industrial equipment, and electronic audio
and video equipment. The product comes with a segment LCD display design which
allows real-time display of the operating data and status of the system.
Comprehensive electronic protections keep the entire system safer and more
stable.
Key Features
1.Full digital voltage and current double closed loop control, advanced SPWM
technology, output of pure sine wave.
2.Two output modes: mains bypass and inverter output; uninterrupted power
supply. 3. Available in 4 charging modes: Only Solar, Utility Priority, PV
Priority, Utility & Solar
hybrid charging. 4. Advanced MPPT technology with an efficiency of 99.9%.
5.Designed with a LCD screen and 3 LED indicators for dynamic display of
system data
and operating status. 6. Manual ON/OFF switch controlling AC output. 7.Power
saving mode available to reduce empty load loss. 8. Intelligent variable speed
fan to efficiently dissipate heat and extend system life. 9. Lithium battery
activation by PV solar or mains, allowing access of lead-acid battery
and lithium battery. 10.Complete protections, including short circuit
protection, over voltage and under
voltage protection, overload protection, reverse protection, etc.
Photovoltaic Modules (PV): convert light energy into DC power, charge the
battery through the solar inverter charger, or directly reverse into
alternating current to power the load.
Power or generator (Utility): Access at the AC input can power the load and
charge the battery. If you do not have a power supply or generator, the system
can also operate normally, where the load is supplied by batteries and
photovoltaic modules.
Battery: The role of the battery is to ensure the normal use of electricity
for the system load when the solar energy is insufficient and there is no
electricity.
Household load: Can be accessed to a variety of household and office loads,
including refrigerators, lamps, televisions, fans, air conditioning and other
AC loads.
Battery Charging Modes: The solar inverter will have 4 operational charging
modes which changes the logic as how and when to charge the battery banks. The
solar inverter has four charging modes: PV priority, Utility Priority, Hybrid
Charging, and Only Solar Charging.
PV Priority In PV Priority mode it will make full use of the solar input
during the day in order to charge the battery bank. This effectively allows
using the unit off-grid during peak utility times in order to cut costs on
utility charging. Only when solar fails to start or is interrupted will the
unit automatically switch to utility mode for backup.
Utility Priority In Utility Priority mode, the detected AC input will be
priority for battery charging. If the power becomes unstable or unusable, then
it will switch to PV charging.
Hybrid Charging In Hybrid Charging, PV and Utility will work together to
charge the battery bank at the same time. Priority will be given to PV and
utilize MPPT charging. Upon PV charging being insufficient, the power supply
replenishes with Utility power. This method is the fastest to charge and
suitable for unstable areas of the grid, ready to provide adequate backup
power supply.
Only Solar Charging Only solar charging is the most energy-efficient way to
charge your battery bank and does not make use of AC input. Utility will not
charge the battery, even if it is available.
Load Output Working Modes The solar inverter has 3 working modes that dictate
how the incoming power is used to power the loads.Users may configure the
output source priority to configure load power.
PV Priority In this mode only the incoming solar energy and battery power are
used to power the loads. This can maximize the use of green energy when
selecting PV priority in Battery Charging Mode to achieve overall energy
conservation and emission reduction. Upon there being no more usable solar
energy or the battery voltage drops to a low voltage setpoint, then the unit
will switch to utility power to continue to power up the loads. It is
recommended to be in this mode for relatively stable areas.
Utility Priority Equivalent to a backup UPS for use in unstable areas of the
grid, Utility will provide power to the loads as priority. Solar and battery
energy will provide power to the loads only when utility power is not
available.
Inverter Mode The Battery energy will supply power to the loads. Utility
provides power to the loads only when battery voltage drops to low voltage
which maximizes the use of DC power.
Identification of Parts
Product Overview
Key Parts
1
LCD Buttons
9
2
Mounting Holes
10
3
LCD Screen
11
4
LED Indicators
12
5
AC Input Breaker
13
6
Dry Contact Port
14
7
RS485 Communication Port
15
8
USB Debugging Port (Internal Use)
AC Input Terminal AC Output Terminal
Cooling Fans PV Input Terminal ON/OFF Rocker Switch Battery Input Terminal
Grounding Lug
Dimensions
Installation
Please read this manual carefully and familiarize yourself with the
installation procedures before installation.
Installation Safety
The unit should be installed in a well-ventilated, cool, and dry environment.
Make sure the fans of the unit and the ventilation holes are not blocked.
Do not expose the unit to rain, moisture, snow, or liquids of any type.
Never install the inverter in a sealed enclosure with flooded batteries. Gas
can accumulate and there is a risk of explosion.
Do not install the inverter in the same compartment as the battery bank
because it could serve as a potential fire hazard.
Location Recommendations
Ensure installation follows the following guidelines: 1. Cool, dry, well-
ventilated area — Heat is the worst enemy for electronic equipment.Inverters
must be in an area where the fans are not blocked or where they are not
exposed directly to the sun. They should be in an area free of any kind of
moisture and allow for clearance of at least 8″ around the unit to provide
adequate ventilation. 2. Protection against fire hazard — the unit should be
away from any flammable material, liquids, or any other combustible material.
The unit can spark and the consequences could be severe. 3. Close proximity to
battery bank–prevent excessive voltage drop by keeping the unit close to the
battery bank and having a properly sized wire going from the battery bank to
the inverter. 4. Limiting electromagnetic interference (EMI) — ensure the
inverter is firmly grounded to a building, vehicle, or earth grounded. Keep
the inverter away from EMI receptors such as TVs, radios, and other
audio/visual electronics to prevent damage/interference to the equipment.
Other Precautions:
When installing the battery, be very careful, when installing lead-acid liquid
batteries, you should wear protective glasses, once in contact with battery
acid, please wash with water in time.
Avoid placing metal objects near the battery to prevent short circuits in the
battery. Acid gas may be generated when the battery is charged so ensure good
ventilation
around the environment. Incorrect or improper connection points and corroded
wires can cause great heat to
melt the wire insulation, burning surrounding materials, and even cause fire,
so ensure that the connection is tightened It is best to avoid mobile
applications when the wire shakes and cause the connection head loose. Outdoor
installation should avoid direct sunlight and rain, snow. Do not install the
solar inverter in harsh environments such as damp, greasy, flammable and
explosive areas or where dust accumulation is high. The municipal electrical
input and AC output are high voltage, do not touch the wiring. Do not touch
the unit when the fan is working. To avoid damage, do not use more than one
(in parallel) input AC power supply.
8inches / 200mm
8inches 200mm
8inches 200mm
8inches / 200mm
Please Note: While the Solar inverter has fans for cooling, this installation
location optimal for natural convection cooling will improve the overall
efficiency
Wiring
The PowMr Solar Inverter is suitable for 24V battery banks systems ONLY. Not
following the minimum DC requirement may cause irreversible damage to the
unit. The solar inverter components at the AC input/output, battery
components, and PV components will produce high energy output. Make sure to
connect The appropriate component to the appropriate labeled terminals. Be
careful of the positive and negative poles. Reversing the poles may cause
permanent damage to the inverter. The input terminals of the inverters have
large capacitors connected to them. Once a positive and negative wire are
connected to the terminals, it will complete the circuit, and commence drawing
a heavy current momentarily. As a result, there may be a sparking occurring
even if the inverter is in the off position. To minimize sparking, it is
recommended that the user have the appropriate size wire feeding into the
solar inverters and/or install an external fuse leading into the inverter.
After the power switch is switched off, there is still high energy inside the
solar inverter, do not open or touch the internal device, wait for the
capacitance to be put off after the relevant operation.
Locate the power button on the solar
ON
inverter and make sure the solar inverter
main power is turned off
OF
Remove the terminal cover by unscrewing the appropriate terminals located on
the face of the solar inverter
Wiring and installation methods must comply with national and local electrical specifications. The following chart is reference only. Longer wire runs between solar panels and the solar inverter as well as longer runs between the solar inverter and battery bank will require thicker wiring size to minimize loss and improve system performance.
Specification
Battery Wiring PV Wiring*
AC Input Wiring AC Output Wiring
Minimum Recommended Wiring AWG 2AWG 7AWG 7AWG
7AWG
Max Amps
140A 40A 40A 40A
Battery Wiring
Be careful of the positive and negative poles. Reversing the poles may cause
permanent damage to the inverter.
The input terminals of the inverters have large capacitors connected to them.
Once a positive and negative wire are connected to the terminals, it will
complete the circuit, and commence drawing a heavy current momentarily.
As a result, there may be a sparking occurring even if the inverter is in the off
position. To minimize sparking, it is recommended that the user have the
appropriate size wire feeding into the solar inverters and/or install an external
fuse leading into the inverter.
Rated Battery Discharge Current
140A
Maximum Battery Recommended
Charging Current
Wiring
100A
2AWG
Recommended Circuit Breaker
2 pole-160A
Recommended Ring Terminal
5/16″
Make sure any circuit breakers are disconnected and ensure the unit is in the off position
The solar inverter takes a 24V battery input to operate. This will require combining 12V or 6V batteries in series to achieve the minimum voltage DC requirement. It is recommended to use battery cables with ring terminals. The ring terminals must be firmly tightened and secured on the respective battery terminals to prevent any excessive heating or resistance. Connect the positive and negative battery ring terminals to the respective positive and negative battery terminals on the solar inverter.
PV Wiring
Maximum PV Charging Current
40A
Recommended Wiring
7AWG
Recommended Circuit Breaker
2 pole-63A
Recommended Wiring
Bare Wire
For PV to charge 24V battery banks, you will need a minimum PV Voc voltage of
30V DC.
When combining panels in parallel it is recommended to use a combiner box for
safety and organizational precautions. The solar inverter accepts a maximum of
100VDC input and requires a 24V battery input to operate. This will require
combining solar panels in series or series parallel to achieve the minimum
voltage DC requirement. Due to many factors affecting PV performance, it is
recommended to utilize the open circuit voltage (Voc) when connecting panels
in series to make sure you stay under the 100VDC input. For parallel
connections, it is recommended to use the short circuit current (Isc) to make
sure you are well under the 40A limit.
The bare wire terminal blocks must be firmly tightened and secured to prevent any excessive heating or resistance. Connect the positive and negative PV wire to the respective positive and negative PV terminal block on the solar inverter.
AC Output Wiring
Only the Live and Neutral wires will be connected to the Output Terminal
Block, the Ground will be connected to the screw terminal.
Make sure any circuit breakers are disconnected and ensure the unit is in the off position.
AC Output should NEVER be connected to public power/utility or a generator.
There are two terminal blocks with “IN” and “OUT” markings. Please do NOT misconnect input and output connectors.
Maximum Inverter Bypass Current
40A
Recommended Wiring 7AWG
Recommended Circuit Breaker
2 pole, 63A
Carefully place the correct AC wire into the respective AC Output terminal block. The ground output cable will need to be connected to the ground screw terminal located separately from the output terminal block. It is recommended to keep ground as close as possible to the solar inverter charger, the shorter the ground wire, the better. The order should be as follows:
Ground | LLive | NNeutral
AC Input Wiring The AC input must never be connected to the AC output as
irreversible overload or damage may result
The AC Input Terminal Block is connected to circuit breakers for added
protection. Do not modify or alter them as it may cause irreversible damage to
the solar inverter.
There are two terminal blocks with “IN” and “OUT” markings. Please do NOT mis-
connect input and output connectors.
Run the AC input line through the AC input cable entry slot. Make sure to use
appropriate cable sizing when working with AC. Carefully place the correct AC
wire into the respective AC Input terminal block. The order should be as
follows:
Ground | LLive | NNeutral
Communication Ports
Dry Contacts
To use this to function, an auto start controller must be installed on the
generator. there are three contacts; up to down: NO, N, NC
Do not store units with auto gen start feature enabled. Generators exhaust
dangerous fumes when running.
RS485
This contact automatically starts the generator and charges the battery bank.
Under normal conditions, this terminal is NC-N point closed, NON point open.
When the battery voltage reaches the low voltage point, the relay coil is
energized, and NO-N point now is closed and NC-N point now is open.
The NO-N contact can drive the resistive load of 125VAC/1A, 30DCV/1A
While the generator is connected, the unit now operates in “Charging Mode”
with the AC power from the Generator charging the batteries as well as
providing power to the AC loads.
This port is an RS485 communication port ; Communication is an optional
function, which is not available in the standard machine.
This port is an RS485 communication port which comes with two functions: It
allows direct communication with the optional host computer developed by our
company through this port, and enables monitoring of the equipment running
status and setting of some parameters on the computer; It also allows direct
connection with the optional RS485 to Bluetooth communication module developed
by our company through this port. After the module is selected, you can
connect the solar charge inverter through the mobile phone Bluetooth APP, on
which you can view the operating parameters and status of the device.
As shown in the figure: Pin 1 is 5V power supply, Pin 2 is GND, Pin 7 is
RS485-A, and Pin 8 is RS485-B ; Pin 5 is CAN-H, and Pin 6 is CAN-L ;
USB The USB port is for internal purposes only. It will not be supported as it
requires proprietary information.
When using both USB and RS485, you can only use one of two alternatives, not
use both simultaneously.
Operation
Assuming all connections are correct and tightly secured, Locate the
power button on the solar inverter and turn the main power switch to
ON
the ON position.
The following describes the basic operation of the solar inverter charger
OFF
LCD Operation
The solar inverter is equipped with 3 LCD indicators and 4 working buttons
UP
DOWN
ENT
LED
Color Behavior
Parameter
AC/INV Yellow
Solid Flash
The output will be powered by the AC Line The output is powered by battery or PV in battery mode
CHARGE Green
Flash Solid
Battery is charging Battery is fully charged
FAULT Red Solid / Flash System fault
Key SET UP DOWN ENT
Parameter Go to / Exit Settings menu Previous selection Next choice Under the Settings menu, determine/enter options
The arrow only displays during
1
startup and not part of the solar
inverter functionality
Indicates that the utility/grid
2
is powering the load
Indicates that the power utility/grid
3
is powering the battery charging
circuit (AC-DC)
Indicates solar (PV) power to
4
the battery charging circuit (DC-
DC)
5
Indicates that the charging circuit is charging the battery
The arrow only displays during 6 startup and not part of the solar
inverter functionality
Indicates that the battery is 7 powering the inverter circuit (DC-
AC)
8
Indicates that the inverter circuit is powering the load
Icon
Function
Indicates that the AC input is connected to AC Source
This icon indicates a wide voltage AC input Mode (APL mode)
Icon
Function
Indicates that the inverter mode circuit is working
Indicates that the solar inverter charger is in the power bypass (Bypass)
Indicates that the PV input is connected
Indicates that the AC output is in an overload state
Indicates that the solar inverter charger is connected to the battery. Status:
0 %~24%,
25%~49%,
50%~74%,
75%~100%
Indicates load percentage in 25% increments from the overall wattage of the
solar inverter charger
0 %~24%,
25%~49%,
50%~74%,
75%
Indicates that the current battery type of the solar inverter charger is lithium
Indicates that the buzzer is not enabled
Indicates that the current battery type of the solar inverter charger is a sealed lead acid
Indicates that an alarm has occurred on the solar inverter charger
Indicates that the battery is charging
Indicates that the solar inverter charger is in a faulty state
Indicates AC/PV charging circuit is working
AC Load voltage output
Indicates that the solar inverter charger is in set mode
1.When not in setting mode displays alarm or fault code. 2.In the setup mode,
the currently set parameter item code is displayed.
The following is on the left side of the LCD Indicates AC input
Indicates PV input
Indicates inverter circuit
This icon is not displayed
Shows battery voltage, total battery charge current, charge power, AC input
voltage, AC input frequency, PV Input voltage, internal heat sink temperature,
and software version
The following is on the right side of the LCD
Indicates output voltage, output current, output power, output visual power,
battery discharge current, software version. In this setting mode, the
settings under the currently set parameter item code are displayed
LCD Menu Screens On the LCD home screen, press the “UP”and”DOWN” buttons to
turn the
page to view the solar inverter’s real-time data.
1 Battery Input Voltage
Load Output Voltage
2 PV Temperature
PV Output Kilowatts
3 PV Input Voltage
PV Output Current
4 Battery Input Current
Battery Output Current
5 Battery Input Kilowatts
Battery Output Kilowatts
6 AC Input Frequency 7 AC Input Voltage
Fault code
AC Output Load Frequency AC Output Load Current
8 Internal Parameters
Load Output KVA
9 Inverter Temperature
Inverter Output Load Kilowatts
10 APP Software Version
Bootloader Software Version
11 Model Battery Voltage Rating
Model Output Power Rating
12 Model PV Voltage Rating
Model PV Current Rating
LCD Programmable Features
Press the “SET” key to enter parameter setting mode. After entering the settings menu, the parameter number 00 flashes and you can press the “UP” and “DOWN” keys to select the parameter code that you want to set. To access the parameter program press “ENT” key to enter the parameter editing state, at which point the value of the parameter flashes. Adjusts the value of the parameter through the “UP” and “DOWN” buttons, and finally press “ENT” to press the key, complete the edit of the parameter, and return to the parameter selection state.
Parameters Number Parameter Name Set options
Description
00
Exit
[00] ESC Exit the settings menu [01] SOL
Solar energy provides power to the loads as priority. If solar energy is not enough to power all connected loads, battery energy will supply power the loads at the same time. Utility provides power to the loads only when any one condition happens: Solar energy is not available Battery voltage drops to low- level set-point in Program [04]
01
Load Working Mode
Utility will provide power to the loads [01] UTI as priority. Solar and battery energy
Default will provide power to the loads only
when utility power is not available
[01] SBU
Solar energy provides power to the loads as priority. If solar energy is not enough to power all connected loads, battery energy will supply power to the loads at the same time. Utility provides power to the loads only when battery voltage drops to low-level set-point in Program[04] [02] 50.0 The output frequency can be set
02
Output Frequency
[02] 60.0 (Default)
through this menu. By default, the value should be 60Hz
[03] APL
By default, the input voltage range is the same, 90~140VAC
03
AC Input Voltage Range
[03] UPS By default, the input voltage range
(Default) is the same, 90~140VAC
Parameters Number Parameter Name
04
Battery Power to Utility Setpoint
Set options
21.8V (Default)
Description
Setting voltage point back to utility source when selecting “SBU ” or “SOL” in
program [01]. When the voltage of the battery is lower than this setting, the
output switches from inverting to the utility. The setting range is from 21.8V
– 26V, in 0.2V increments. Cannot exceed the value of [14] settings.
Setting voltage point back to battery
mode when selecting “SBU” or
“SOL” in program [01]. When the
05
Utility to Battery Power setpoint
[05] 28.8V (Default)
battery voltage is higher than the setting value, the output is switched from the utility to the battery mode.
The setting range is 24V – 30V, in
0.2V increments.
*Cannot be lower than the value of
[04] / [35] settings.
Solar energy will charge battery as
[06] CSO
priority. Utility will charge battery only when solar energy is not
Battery Charging
available
Mode Please Note: If this inverter /charger is working in Battery mode or
[06] CUB
Utility will charge battery as priority. Solar energy will charge battery only when utility power is not available
06
Power saving mode, only solar
Solar energy and utility will charge battery at the same time. MPPT
energy can charge battery.
Solar energy will
[06]SNU (Default)
Solar energy will be priority charging and when it is insufficient, Utility will become priority. When
charge battery if it’s
the photovoltaic energy is sufficient
available and
again, Utility will stop charging
enough
[06] OSO
Solar energy will be the only charging source even if utility is available
07
Maximum charging current:
(Max. charging current = utility charging current + solar charging
current)
[07] 60A (Default)
The maximum solar charging is 60A, the maximum Grid/Utility charging is 40A (adjustable in Program 28), totaling the maximum current of 100A.The range can be configured between 0 ~ 100A
Parameters Number Parameter Name
Set options
Description
[08] USE
User-defined, all battery parameters can be set
[08] SLD (Default)
Sealed lead-acid/AGM battery, constant voltage charging 28.8V, float charging voltage 27.6V
08
Battery type
09 *available in USER and lithium setting
only
Boost Charge Voltage
[08] FLD
Flooded lead-acid battery,constant voltage charging 29.2V,float charging voltage 27.6V
[08] GEL
[08] LF07 LF08 LF09
[08] NCA
Gel lead-acid battery, constant voltage charging 28.4V,float charging voltage
27.6V
Lithium iron phosphate battery LF07/LF08/LF09, corresponding to 7 strings ,8
strings and 9 strings of lithium iron phosphate battery; for 7 strings,
default constant-voltage charge voltage is 24.8V; for 8 strings, default
constant-voltage charge voltage is 28.4V; for 9 strings, default constant-
voltage charge voltage is 31.8V; allow adjustable.
Ternary lithium battery; the default constantvoltage charge voltage is 28.4V,
which is adjustable.
[09] 28.8 (Default)
Boost charge voltage setting; the setting range is 24V~29.2V, with step of 0.2V; it is valid for userdefined battery and lithium battery.
10 *available in USER
setting only
Boost Charge Duration
[10] 120 min (Default)
Raise the boost charge time setting, refers to the constant voltage charging reached at Program [09] . The range is 5min to 900min, in 5 minute increments
11 *available in USER
setting only
Float Charge Voltage
[11]27.6V Floating charging voltage set range (Default) 24V to 29V, in 0.2V increments
Parameters Number Parameter Name
12 *available in USER and lithium setting
only
Low Voltage Load Disconnect
Set options
[12] 21V (Default)
Description
It is recommended to set this voltage below the maximum voltage the battery
can withstand. When this voltage is reached, the loads will be powered off
after a time delay adjustable in Program [13] The range is 20V to 24V, in 0.2V
increments
Battery Over-
discharged
Delay Time
**If a power
shortage occurs
and recovers in a
short time, it can
13
cause damage to
*available in USER your connected
and lithium setting appliances. To
only
prevent this kind of
damage, please
check manufacturer
if heavy load
appliances are
equipped with
time-delay function
before installation
[13] 5S (Default)
The following parameter sets the
delay-time after the battery voltage
is below the set-point in Program [12]. The set range is 5-50 seconds, in 5s
increments
14
*available in USER
Battery
and lithium setting Undervoltage Alarm
only
[14] 22V (Default)
15 *available in USER and lithium setting
only
Battery Discharge Limit Voltage
[15]20V (Default)
Warning that the battery is approaching low voltage. The output does not shut
down and the range is 20V to 26V, in 0.2V increments
When the battery voltage goes below this voltage set-point, the solar inverter
will immediately disconnect and shut down immediately. The set range is 20V to
26V, in 0.2V increments
16 *available in FLD and USER setting
only
Set Equalization charging
[16] DIS
[16] ENA (Default)
No equalization charging Enables equalization charging
17 *available in FLD and USER setting
only
Battery Equalization Voltage
[17] 29.2V (Default)
Set equalization charging voltage. The range is 24V to 29.2V, in 0.2V increments
Parameters Number Parameter Name
18 *available in FLD and USER setting
only
Battery Equalization Duration
Set options
[18] 120min (Default)
Description
Setting range is from 5min to 900 min. , in 5min increments
19 *available in FLD and USER setting
only
Battery Equalization [19] 240min
Time-Delay
(Default)
Setting range is from 5min to 900 min, in 5min increments
20 *available in FLD and USER setting
only
Equalization interval
[20] 30 days Setting range is from 0 days to 30 (Default) days, in 1 day increments
21 *available in FLD Enable Equalization and USER setting Immediately
only
[21] DIS (Default)
[21] ENA
Stops equalization charging immediately
Starts Equalization charging immediately
[22] DIS Default
Disables power-saving mode
22 *Power-saving Mode Power-saving Mode
(ECO Mode)
[22] ENA
After the power saving mode is enabled, if the load is null or less than 50W, the inverter output is turned off after a delay for a certain period of time. When the load is more than50W, the inverter automatic restart.
[23] DIS
Overload automatic restart is disabled, and the unit will not turn on the loads
23
Overload auto-start
Enables automatic restart if the load shutdown output has occurred.
[23] ENA The unit attempts to restart the
(Default) output after 3 minutes and After 5
attempts the unit will not longer
resume to turn on the loads
[24] DIS
Over-temperature automatic restart is disabled
24
Overtemperature auto-start
The over-temperature protection is [24] ENA activated and upon temperature
(Default) dropping, the unit automatically
restarts
Parameters Number Parameter Name
25
Buzzer alarm
26
Alarm
Set options
Description
[25] DIS No alarm [25] ENA (Default)
[26] DIS
[26] ENA (Default)
Enable alarm
No alarm prompts when the status of the primary input source changes
Enable alarm prompts when the status of the primary input source changes
Overload bypass: When enabled, the
[27] DIS
When disabled, the unit will not transfer to Utility mode
27
unit will transfer to line mode if
overload occurs in battery mode.
[27] ENA (Default)
When enabled, the unit will transfer to Utility mode if overload occurs in battery mode.
28
Maximum AC
[28]40A The range can be configured
Charging Current Default between 0-40A
[29] DIS Supply for industrial frequency
Default transformer (disabled)
29
Split Phase
[29] ENA
Supply for industrial frequency transformer (enabled)
Set point that recovers and
35
Low Voltage Disconnect
Recover
[35] 27V (Default)
reconnects the solar inverter from being disconnected in Low Voltage Disconnect. The range is from 20V
-27V, in 0.2V increments.
36
PV Charging Current
[36] 60A (Default)
Adjustable PV current settings. The range is from 0 60A.
When the battery reached at
floating status, it will need to be
37
Battery Charging Boost Return Setpoint
[37] 26V (Default)
lower than this setpoint before it starts charging. The range is the ( Undervoltage Warning ~
( Floating Voltage 1.2V for
the respective battery
Allow to set to
38
AC output
38] 120Vac 100Vac/105Vac/110Vac/120Vac.
voltage setting (Default) The rated output power will be
reduced= (Power Rate)*(Vset/120)
Electronic Protections
Number 1
2 3
Protection PV Current/Power Limiting Protection
PV Night anti-charge protection
Overvoltage Protection
Description
When the configured PV array charge current exceeds the PV rated current, it
will be charged at the rated current
At night, the battery is prevented from discharging through the PV component
because the voltage of the battery is greater than the voltage of the PV
component
Triggered when AC Input voltage reaches 140V
4
Power Input Undervoltage Protection
When utility input is below 90VAC, charging is stopped and the solar inverter is in inverter mode
When the battery voltage reaches the overvoltage
5
Battery Over-voltage disconnect point, the PV and the utility automatically
Protection
stop charging the battery, preventing damage from
overcharging the battery
When the battery voltage reaches the low voltage
6
Battery low-voltage protection
disconnect voltage point, the battery discharge is automatically stopped to prevent excessive
discharge of the battery from being damaged
When a short-circuit fault occurs at the load output,
7
Load output short-circuit protection
the output AC voltage is immediately turned off and outputs again after 1sec, for 3 more attempts. If they fail, then the unit will need to be manually powered
on
8
Over-temperature protection
When the internal temperature of the unit is too high, the it will stop charging and discharging
Output again after 3 minutes after overload
protection, overload 5 times in a row until the solar
9
Overload protection inverter charger is powered back, with
A table of technical parameters after reference to
the load level and duration of the manual
10
PV reverse polarity Protection against reversing PV input connection
11
Bypass Protection protection
Prevents battery power mode from inverting when bypass is active
12
Bypass Flow Protection
Built-in AC input overcurrent protection circuit breaker
13
Battery input overcurrent protection
When the battery discharge output current is greater than the maximum and lasts 1 minute, the AC input is loaded
When the battery is reversed or the inverter is
14
Battery input protection shorted inside, the internal battery input fuse of the
inverter fuses to prevent battery damage or fire
15
Charge short-circuit protection
The inverter protects and stops when the external battery port is shorted while the PV or AC is charging stop the output current
Fault code 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 17 19 20 21 22 23 26 29
Fault Codes
Fault name
BatVoltLow BatOverCurrSw
BatOpen BatLowEod BatOverCurrHw BatOverVolt BusOverVoltHw BusOverVoltSw
PvVoltHigh PvBuckOCSw PvBuckOCHw bLineLoss OverloadBypass OverloadInverter
AcOverCurrHw
InvShort OverTemperMppt OverTemperInv
FanFail EEPROM ModelNumErr RlyShort BusVoltLow
Descriptin
Battery under-voltage alert Battery discharge current software protection
Battery not detected Battery undervoltage stopdischarge alarm Battery
overcurrent hardware protection Charge overvoltage protection Bus overvoltage
hardware protection Bus overvoltage software protection PV overvoltage
protection Buck Overcurrent Software Protection Buck Overcurrent Hardware
Protection utility power down Side-by-side load protection inverter overload
protection Inverted overcurrent hardware protection Inverter short-circuit
protection Controller overtemperature protection inverter over temperature
protection Fan failure Memory failure Model settings are wrong Error between
AC output and bypass Internal battery boost circuit failure
Fault Screen not displaying
Solutions
as Make sure the battery is properly connected and charged to
be able to recognize the solar inverter. or click any button on the screen to
exit screen sleep mode.
Rechargeable battery overvoltage protection
Measure whether the battery voltage exceeds 60Vand disconnect the photovoltaic array from and the power-on.
Battery undervoltage protection
Wait until the battery is charged to return to above the low voltage recovery voltage.
Fan failure
Check that the fan is not turning or is blocked by something else.
Over-temperature Protection
When the temperature of the equipment cools to, normal charge and discharge control is restored.
Overload Protection
(1) Reduce the use of electrical equipment;(2) restart the solar inverter charger and load recovery output.
Inverter short-circuit protection
Disconnect or reduce any loads from the unit. Shut down the solar inverter charger and turn on again to clear the error.
PV overvoltage Battery missed alert
Check with the meter if the PV input voltage is above the
maximum allowable input voltage of V operating voltag e . Check that the
battery is not connected or that the battery side circuit breaker is not
closed.
Maintenance
In order to maintain optimal long-term performance, it is recommended to
perform inspections of the following items twice a year.
1.Make sure that the air flow around the solar inverter is not blocked and
remove any dirt or debris from the radiator.
2.Check all terminals to see if there is corrosion, insulation damage, high
temperature or combustion / discoloration signs, tighten the terminal screws.
Danger of electric shock! Make sure that all power supplies on solar inverter
disconnected and that all capacitive power is released before checking or
operating accordingly!
Technical Specifications
Model
POW-LVM3K-24V
Rated input Voltage
Utility/Grid 110/120Vac
Input voltage range
(90Vac~140Vac) ±2%
Frequency Frequency range Overload / Short circuit Protection
50Hz/ 60Hz (auto detect) 47±0.3Hz ~ 55±0.3Hz (50Hz); 57±0.3Hz ~65±0.3Hz
(60Hz);
Breaker
Efficiency
95%
Conversion time (Bypass and reverse) 10ms
Reverse Flow Protection
Yes
Max Bypass Current load Waveform
40A Inverter
Pure Sine Wave
Rated Output (VA)
3000
Rated Output (W) Power factor Output AC Voltage
3000 1 120Vac
Unstable Input Error Output Frequency (Hz)
±5% 50Hz ±0.3Hz 60Hz ± 0.3Hz
Efficiency
92%
Overload protection
Peak power Motor Capability
For U model:
(102% < load <110%) ±10%: report error and turn off the output after 5
minutes; (110% < load < 125%) ± 10%: report error and turn off the output
after 10 seconds; Load >125% ±10%: report error and turn off the output after
5 seconds;
6000W
2HP
Output Short-circuit Protection
Breaker
Bypass Breaker Specifications Rated Battery Voltage
40A 24V (Minimum starting voltage 22V)
Battery voltage range Power Saving Mode Self-Consumption No Load Self Consumption
20.0Vdc~33Vdc ± 0.6Vdc 50W 24W
Model
POW-LVM3K-24V
Battery type
Utility/Grid Charging Lead Acid or Lithium
Maximum Charging Current (AC)
40A
Unstable Condition Error
± 5Adc
Charging Voltage Range Short-circuit protection Circuit Breaker Specifications
Overcharge Protection
Recommended PV Max
20 33Vdc Circuit breaker and blown fuse 40A Yes; Automatically alerts and then turns off charging after1 minute Solar (PV) Charging 100Vdc
PV Operating Voltage
30-100Vdc
MPPT Voltage Range
30-85Vdc
Battery Charging Range
20-33Vdc
Maximum Input Power Maximum Input Current Maximum Output Power PV Charging Current Range Short-circuit Protection
1600W 60A 1400W 0-60A Blown fuse
Wiring Protection
Reverse Polarity
Certifications
General FCC Part 15 Class B, RoHS
Operating Temperature
5°F ~ 131°F/ -15°C ~ 55°C
Storage Temperature
-13°F ~ 140°F / -25°C ~ 60°C
Humidity Noise Cooling
5% to 95% (three-layer paint protection) 60dB Fans
IP Grade Safety Class Dimensions (L-W-D) Weight
IP 20 I 14.9114.05 in / 378mm280mm103mm 14.96 lbs /6.8kg
Non-Lithium Battery Parameters
Battery type
Parameters Overvoltage disconnection voltage
Sealed lead acid battery
(SLD)
30.0V
Colloidal lead acid battery
(GEL)
30.0V
Vented lead acid battery
(FLD)
31.0V
User-defined (User)
1830V
Battery fully charged
26V
recovery point(setup item 37) (adjustable)
26V (adjustable)
26V (adjustable)
26V (adjustable)
Equalizing charge voltage
29.2V
–
29.6V
1830V
Boost charge voltage
28.8V
28.4V
29.2V
1830V adjustable)
Floating charge voltage
27.6V
Undervoltage alarm voltage (01 fault)
22.0V
Undervoltage alarm voltage recovery point(01 fault)
Low voltage disconnection voltage (04 fault)
Low voltage disconnection voltage recovery point (04 fault)(setup item 35)
21.0V 26V (adjustable)
Discharge limit voltage
20.0V
Over-discharge delay time
5S
27.6V 22.0V
27.6V 22.0V
1830V adjustable)
1830V adjustable)
Undervoltage alarm voltage+0.4V
21.0V 26V (adjustable) 20.0V 5S
21.0V 26V
(adjustable) 20.0V 5S
1830V adjustable)
26V (adjustable)
1830V adjustable)
1~30S adjustable)
Equalizing charge duration
120 minutes
–
120 minutes
0600 minutes adjustable)
Equalizing charge interval
30 days
–
30 days
0250 days adjustable)
Boost charge duration
120 minutes
120 minutes
120 minutes
10600
minutes adjustable)
When modifying parameters in User Mode, the following rules must be followed to
set parameters successfully.
1.Overvoltage Disconnect > Overvoltage Disconnect Recover
Equalization voltage Boost voltage Float voltage
2.Overvoltage Disconnect > Over Voltage Disconnect Recover
3.Low Voltage Disconnect Recover > Low Voltage Disconnect (at
least 2V Smaller) < Discharge Limit Voltage
4.Undervoltage Recover > Undervoltage Alarm
If setting the Low Voltage Disconnect in User Mode, it must always be
at least 2V lower than the Low Voltage Disconnect Recovery Voltage.
Lithium Battery Parameters
Battery type
Parameters Overvoltage disconnection voltage
Ternary lithium battery (N07)
31.6V
Ternary lithium battery (N08)
33V
Lithium iron
phosphat e battery
(LF07)
30V
Lithium iron
phosphat e battery
(LF08)
Lithium iron
phosphate battery (LF09)
30V
33V
Battery fully charged recovery 27.4V
30.4V
23.2V
26.8V
29.8V
point(setup item 37)
(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)
Equalizing charge voltage
28.8V
31.6V
24.6V
28.4V
31.6V
(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)
Boost charge voltage
28.8V
31.6V
24.6V
28.4V
31.6V
(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)
Floating charge voltage
28.8V
31.6V
24.6V
28.4V
31.6V
(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)
Undervoltage alarm voltage (01 fault)
23.4V
26.8V
21.6V
24.8V
27.8V
(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)
Undervoltage alarm voltage recovery point(01 fault)
Undervoltage alarm voltage+0.4V
Low voltage disconnection 21.0V
24.0V
21.0V
24.4V
27.0V
voltage (04 fault)
(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)
Low voltage disconn-ection voltage recovery point (04 fault) (setup item 35)
26V (adjustable)
29.6V (adjustable)
23.8V (adjustable)
27.2V
30.6V
(adjustable) (adjustable)
Discharge limit voltage
19.6V
22.4V
20.4V
23.2V
26.2V
Over-discharge delay time
30s
30s
30s
30s
30s
(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)
Equalizing charge duration
–
–
–
–
–
Equalizing charge interval
–
–
–
–
–
Boost charge duration
120
120
120
120
120
minutes minutes minutes minutes minutes
(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)
When modifying parameters in User Mode or Lithium, the following rules must be
followed to set parameters successfully.
1. Overvoltage Disconnect > Overvoltage Disconnect Recover Equalization
voltage Boost voltage Float voltage
2. Overvoltage Disconnect > Over Voltage Disconnect Recover
3. Low Voltage Disconnect Recover > Low Voltage Disconnect (at least 2V Smaller) < Discharge Limit Voltage
4. Undervoltage Recover > Undervoltage Alarm
If setting the Low Voltage Disconnect in User Mode, it must always be
at least 2V lower than the Low Voltage Disconnect Recovery Voltage
Charging Parameters Glossary
Overvoltage Disconnect–When and if the charge controller experiences a voltage
higher than what is assigned, it will disconnect itself from the circuit;
ceasing charge.
Overvoltage Recover– in the event a charge controller experiences an over-
voltage condition set by the previous parameter, then this reconnecting
parameter is put into play to direct the controller when it can connect and
safely charge again. Typically over-voltage reconnection is achieved when time
has passed (ex. The sun setting), or when the overvoltage condition is
remedied ultimately reducing the voltage to a user defined charging voltage.
Equalization Voltage– equalization voltage is a corrective over-charge of the
battery. The user should consult their battery manufacturer regarding specific
battery equalization capacity. This parameter sets the equalization voltage to
set the battery at when it reaches the equalization state.
Boost Voltage– users should check with their battery manufacturer for proper
charging parameters. In this stage, users set the boost voltage where the
battery will reach a voltage level and remain there until the battery
undergoes an absorption stage.
Float Voltage– once the charge controller recognizes the set float voltage, it
will commence floating. The battery is supposed to be fully charged in his
state, and the charge current is reduced to maintain battery stability levels.
Undervoltage Recover– deals with the loads connected to the system. When
batteries are determined to be low due to them approaching low voltage
disconnect, then the loads will be shut off to give the batteries time to
recover. This parameter sets the controller to shut off the loads until it can
reach the low voltage reconnect stage.
Undervoltage Alarm– this parameter deals with the batteries themselves
approaching the under-voltage recovery state. The user should minimize loads
before the charge controller approaches a level where it will do this
automatically to protect the battery from discharging.
Low Voltage Recover– parameter allows loads connected to the system will be
able to operate (not fully) again.
Low-voltage disconnect– prevents over-discharge of the batteries by
automatically disconnecting any loads. This extends battery life and is the
precedent to being in an under-voltage state, recovering from the undervoltage
state, and finally reconnecting to normal operational state.
Discharging limit Voltage– This parameter ensures that the controller does not
exceed the default or assigned parameter before needing to be charged again.
This is put into play to optimize and extend the battery life by going with a
higher voltage. The lower the
discharge limit voltage the more negative effect on battery efficiency
This equipment has been tested and found to comply with the limits for a class
Bdigital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio
frequency energy and if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more
of the following measures:
Reorient or relocate the receiving antenna. Increase the separation between
the equipment and receiver. Connect the equipment into an outlet on a circuit
different from that to which the
receiver is connected. Consult the dealer or an experienced radio/TV
technician for help.
This device complies with Part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.