Sun Gold Power Inc LFP Series Pure Sine Wave Inverter Charger User Manual

Sun Gold Power Inc LFP Series Pure Sine Wave Inverter Charger

Product Information

Specifications

• Manufacturer: Sun Gold Power Inc
• Website:www.sungoldpower.com
• Inverter/Charger Type: Pure Sine Wave

Important Safety Information

It is important to follow these safety precautions during the installation and maintenance of the inverter:

• Follow all instructions provided in this manual.

Precautions When Working with Batteries

When working with batteries, please take note of the following precautions:

• If battery acid contacts skin or clothing, wash it immediately with soap and water. If acid enters the eye, immediately flood the eye with running cold water for at least 20 minutes and seek medical attention immediately.
• Never smoke or allow a spark or flame in the vicinity of the battery or engine.
• Do not drop a metal tool on the battery as it may cause a spark or short-circuit.

Introduction

The LFP Inverter/Charger models by Sun Gold Power Inc. are designed to provide reliable power conversion and charging capabilities.

Application

The LFP Inverter/Charger is suitable for various applications including home and office appliances, renewable energy systems, and as a backup power source.

Features

The LFP Inverter/Charger offers the following features:

• Smart Remote Control (RMT)
• Designed to Operate under a Harsh Environment
• DC Start & Automatic Self-Diagnostic Function
• Compatible with Both Linear & Non-Linear Load
• Easy to Install & Easy to Operate & Easy to Solve
• Low DC Voltage Supports Home & Office Appliances
• Powerful Charge Rate Up to 120Amp, Selectable From 0%-100%
• High-Efficiency Design & Power Saving Mode to Conserve Energy
• Battery Priority Mode, Designates the Inverter-Preferred UPS Configuration
• 13 Vdc Battery Recover Point, Dedicated to Renewable Energy Systems
• 8 pre-Set Battery Type Selector plus De-sulphation for Totally Flat Batteries
• 4-step Intelligent Battery Charging, PFC (Power Factor Correction) for Charger
• 8 ms Typical Transfer Time Between Utility & Battery, Guarantees Power Continuity
• 15s Delay Before Transfer when AC Resumes, Protection for Load When used with a Generator

Mechanical Drawing

The LFP Inverter/Charger is equipped with an AC charger that supports different battery charging processes.

The table below shows the switch settings and corresponding battery charging processes:

Battery Type Selector

The LFP Inverter/Charger provides an 8-step battery type selector for different battery types. The table below shows the battery types corresponding to each switch setting:

FAQ (Frequently Asked Questions)

Q: How do I install the LFP Inverter/Charger?

• A: Please refer to Appendix 2 – Installation Diagram in the user manual for detailed installation instructions.

Q: What should I do if battery acid contacts my skin?

• A: If battery acid contacts your skin or clothing, wash immediately with soap and water.

Q: Can I use the LFP Inverter/Charger with both linear and non-linear loads?

• A: Yes, the LFP Inverter/Charger is compatible with both linear and non-linear loads.

Q: How long does it take for the LFP Inverter/Charger to transfer power between utility and battery?

• A: The typical transfer time is 8 ms.

Important Safety Information

WARNING!

• This manual contains important instructions for all LFP Inverter/Charger models that shall be followed during installation and maintenance of the inverter.

General Safety Precautions

• Do not expose the Inverter to rain, snow, spray, bilge, or dust. To reduce the risk of hazard, do not cover or obstruct the ventilation openings. Do not install the Inverter in a zero-clearance compartment. Overheating may result. Allow at least 30CM(11.81 inches) of clearance around the inverter for airflow. Make sure that the air can circulate freely around the unit. A minimum airflow of 145CFM is required.
• To avoid a risk of fire and electronic shock. Make sure that existing wiring is in good electrical condition; and that wire size is not undersized. Do not operate the Inverter with damaged or substandard wiring.
• This equipment contains components that can produce arcs or sparks. To prevent fire or explosion do not install in compartments containing batteries or flammable materials or in locations that require ignition-protected equipment.
• This includes any space containing gasoline-powered machinery, fuel tanks, joints, fittings, or other connections between components of the fuel system.
• See Warranty for instructions on obtaining service.
• Do not disassemble the Inverter/Charger. It contains no user-serviceable parts. Attempting to service the Inverter/Charger yourself may result in a risk of electrical shock or fire. Internal capacitors remain charged after all power is disconnected.
• To reduce the risk of electrical shock, disconnect both AC and DC power from the Inverter/Charger before attempting any maintenance or cleaning. Turning off controls will not reduce this risk
• CAUTION: Equipment damage
• The output side of the inverter’s AC wiring should at no time be connected to public power or a generator. This condition is far worse than a short circuit. If the unit survives this condition, it will shut down until corrections are made.
• Installation should ensure that the inverter’s AC output is, at no time, connected to its AC input.

Warning: Limitations On Use

• SPECIFICALLY, PLEASE NOTE THAT THE LFP SERIES INVERTER/CHARGER SHOULD NOT BE USED IN CONNECTION WITH LIFE SUPPORT SYSTEMS OR OTHER MEDICAL EQUIPMENT OR DEVICES.

Precautions When Working with Batteries

• If battery acid contacts skin or clothing, wash immediately with soap and water. If acid enters the eye, immediately flood the eye with running cold water for at least 20 minutes and get medical attention immediately.
• Never smoke or allow a spark or flame in the vicinity of the battery or engine.
• Do not drop a metal tool on the battery. The resulting spark or short-circuit on the battery of another electrical part may cause an explosion.
• Remove personal metal items such as rings, bracelets, necklaces, and watches when working with a lead-acid battery. A lead-acid battery produces a short-circuit current high enough to weld a ring or the like to metal, causing a severe burn.
• To reduce the risk of injury, charge only rechargeable batteries such as deep-cycle lead acid, lead-antimony, lead calcium gel cell, absorbed mat, NiCad/NiFe, or Lithium battery.
• Other types of batteries may burst, causing personal injury and damage.

Introduction

General Information

• This Series Pure Sine Wave Inverter is a combination of an inverter, battery charger, and AC auto-transfer switch into one complete system with a peak conversion efficiency of 88%.
• It is packed with unique features and it is one of the most advanced inverter/chargers in the market today. It features power factor correction, sophisticated multi-stage charging, and pure sine wave output with unprecedentedly high surge capability to meet the demanding power needs of inductive loads without endangering the equipment.
• For the regular model, when utility AC power cuts off(or falls out of acceptable range), the transfer relay is de-energized and the load is automatically transferred to the Inverter output. Once the qualified AC utility is restored, the relay is energized and the load is automatically reconnected to the AC utility.
• The LFP Series Inverter is equipped with a powerful charger of up to 110Amps (depending on model). The overload capacity is 300% of continuous output for up to 20 seconds to reliably support tools and equipment longer
• Another important feature is that the inverter can be easily customized to Battery priority via a DIP switch, this helps to extract maximum power from battery in renewable energy systems.
• Thus, the LFP Series Pure Sine Wave Inverter is suitable for Renewable energy systems, Utility, RV, Marin, and Emergency appliances.
• To get the most out of the power inverter, it must be installed, used, and maintained properly. Please read the instructions in this manual before installing and operating.
• Application
• Power tools–circular saws, drills, grinders, sanders, buffers, weed and hedge trimmers, air compressors. Office equipment – computers, printers, monitors, facsimile machines, scanners.
• Household items – vacuum cleaners, fans, fluorescent and incandescent lights, shavers, sewing machines. Kitchen appliances – coffee makers, blenders, ice markers, toasters.
• Industrial equipment – metal halide lamp, high–pressure sodium lamp.
• Home entertainment electronics – television, VCRs, video games, stereos, musical instruments, satellite equipment.

Features

• Smart Remote Control (RMT)
• Designed to Operate under HarshEnvironment
• DC Start & Automatic Self-diagnostic function
• Compatible with Both Linear & Non-LinearLoad
• Easy to Install & Easy to Operate & Easy to solve
• Low DC Voltage Supports Home & Office Appliances
• Powerful Charge Rate Up to 120Amp, Selectable From 0%-100%
• High Efficiency Design & “Power Saving Mode” to Conserve Energy
• Battery Priority Mode, Designates the Inverter-Preferred UPS Configuration
• 13 Vdc Battery Recover Point, Dedicated for Renewable Energy Systems
• 8 pre-Set Battery Type Selector plus De-sulphation for Totally Flat Batteries
• 4-step Intelligent Battery Charging, PFC (Power Factor Correction) for Charger
• 8 ms Typical Transfer Time Between Utility & Battery, Guarantees PowerContinuity
• 15s Delay Before Transfer when AC Resumes, Protection for Load when Used with Generator

Mechanical Drawing

LFP 1KW to 1.5KW Models

LFP 2KW to 4KW Models

LFP 5KW to 6KW Models

Electrical Performance

AC Charger

• LFP Series is equipped with an active PFC (Power Factor Corrected) multistage battery charger. The PFC feature is used to control the amount of power used to charge the batteries to obtain a power factor as close as possible to 1.
• Unlike other inverters whose max charging current decreases according to the input AC voltage, the LFP series charger can output max current as long as the input AC voltage is in the range of 164-243VAC (95-127VAC for 120V model), and AC freq is in the range of 48-54Hz(58-64Hz for 60Hz model).
• The LFP series inverter has a strong charging current of 120Amp (for 4KW,12V), and the max charge current can be adjusted from 0%-100% via a liner switch at the right of the battery type selector. This will be helpful if you are using our powerful charger on a small-capacity battery bank. Fortunately, the liner switch can effectively reduce the max charging current to 20% of its peak.
• Choosing “0” in the battery type selector will disable the charging function.

There are mainly 3 stages:

• Bulk Charging: This is the initial stage of charging. While Bulk Charging, the charger supplies the battery with a controlled constant current.
• The charger will remain in Bulk charge until the Absorption charge voltage (determined by the Battery Type selection) is achieved.
• The software timer will measure the time from A/C start until the battery charger reaches 0.3V below the boost voltage, then take this time as T0 and T0×2 = T1.
• Absorb Charging: This is the second charging stage and begins after the absorb voltage has been reached. Absorb Charging provides the batteries with a constant voltage and reduces the DC charging current to maintain the absorb voltage setting.
• In this period, the inverter will start a T1 timer; the charger will keep the boost voltage in Boost CVmode until the T1 timer has run out. Then drop the voltage down to the float voltage. The timer has a minimum time of 1 hour and a maximum time of 12 hours.
• Float Charging: The third charging stage occurs at the end of the Absorb Charging time. While Float charging, the charge voltage is reduced to the float charge voltage (determined by the Battery Type selection*). In this stage, the batteries are kept fully charged and ready if needed by the inverter.
• If the A/C is reconnected or the battery voltage drops below 12Vdc/24Vdc/48Vdc, the charger will reset the cycle above.
• If the charge maintains the floating state for 10 days, the charger will deliberately reset the cycle to protect the battery.

Table 2.5.2 Battery Type Selector

• For 12Vdc Mode Series (2 for 24Vdc Mode ; 4 for 48Vdc Mode)

Use with Lithium Ion Battery Packs

• Our inverter charger can work with various lithium batteries like LiFePO4, and LFP batteries. Please check the battery specification to make sure the charging setting of the inverter suits your lithium battery charge voltage and cut-off voltages.
• If the charging setting of the inverter doesn’t match your lithium battery, please email your requirements to sales@sungoldpower.com for customization.

De-sulphation

• The de-sulphation cycle on switch position 8 is marked in red because this is a very dangerous setting if you do not know what you are doing. Before ever attempting to use this cycle you must clearly understand what it does and when and how you would use it.
• What causes sulphation? This can occur with infrequent use of the batteries(nor), or if the batteries have been left discharged so low that they will not accept a charge.
• This cycle is a very high voltage charge cycle designed to try to break down the sulfated crust that is preventing the plates from taking charge and thus allowing the plates to clean up and so accept charge once again.

Charging depleted batteries

• The LFP series inverter allows start-up and through power with depleted batteries.
• For the 12VDC model, after the battery voltage goes below 10V, if the switch is still (and always) kept in the “ON” position, the inverter is always connected to a battery, and the battery voltage does not drop below 2V, the inverter will be able to charge the battery once qualified AC inputs are present.
• Before the battery voltage goes below 9VDC, the charging can be activated when the switch is turned to “Off”, then to “ON”.
• When the voltage goes below 9VDC, and you accidently turn the switch to OFF or disconnect the inverter from the battery, the inverter will not be able to charge the battery once again, because the CPU loses memory during this process.

Tabel 2.5.3 AC Charging Current for OIS model

Model Watt| **Battery Voltage| AC Charger Current**

Max

| Model Watt| **Battery Voltage| AC Charger Current**

Max

---|---|---|---|---|---
1.000

~ 1.500

| 12 Vdc| 45 ± 5 Amp| **2.000| 12 Vdc| 70 ± 5 Amp
24 Vdc| 25 ± 5 Amp| 24 Vdc| 25 ± 5 Amp
48 Vdc| 15 ± 5 Amp| 48 Vdc| 20 ± 5 Amp
****3.000| 12 Vdc| 90 ± 5 Amp| ****4.000| 12 Vdc| 120 ± 5 Amp
24 Vdc| 40 ± 5 Amp| 24 Vdc| 50± 5 Amp
48 Vdc| 30 ± 5 Amp| 48 Vdc| 40 ± 5 Amp
5.000| 24 Vdc| 80 ± 5 Amp| 6.000**| 24 Vdc| 90 ± 5 Amp
48 Vdc| 50 ± 5 Amp| 48 Vdc| 60 ± 5 Amp

• The charging capacity will go to a peak in around 3 seconds. This may cause a generator to drop frequency, making the inverter transfer to battery mode.
  It is suggested to gradually put a charging load on the generator by switching the charging switch from min to max, together with the 15s switch delay, our inverter gives the generator enough time to spin up.

• This will depend on the size of the generator and rate of charge.

Inverter

Topology

• The LFP inverter/charger is built according to the following topology.
• Inverter: Full Bridge Topology.
• AC Charger: Isolate Boost Topology
• Because of high-efficiency Mosfets and 16bit, 4.9MHz microprocessor, and heavy transformers, it outputs PURE SINE WAVE AC with an average THD of 10% (Min5%, Max 15%) depending on the load connected and battery voltage.
• The peak efficiency of the LFP series is 88%.

Overload Capacity

The LFP series inverters have different overload capacities, making them ideal to handle demanding loads.

1. For 110%<Load<125%(±10%), no audible alarm in 14 minutes, beeps 0.5s every 1s in the 15th minute, and Fault(Turn off) after the 15th minute.
2. For 125%<Load<150%(±10%), beeps 0.5s every 1s and Fault(Turn off) after the 1 minute. 3 For 300%≧Load>150%(±10%), beeps 0.5s every 1s and Fault(Turn off) after 20s.

Auto frequency adjust

• The inverter has with Auto Frequency adjust function.
• The factory default configuration for 220/230/240VAC inverter is 50Hz, and 60Hz for 100/110/120VAC inverter. While the output freq can be easily changed once a qualified freq is applied to the inverter.
• If you want to get 60Hz from a 50Hz inverter, just input 60Hz power, and the inverter will automatically adjust the output freq to 60Hz and vice versa.

DIP Switches

• On the rear panel of the inverter, 5 DIP switches enable users to customize the performance of the device.

Dip Switch Function Setting

2 for 24VDC, 4 for 48VDC
SW2| AC Input Range| 184-253VAC

100-135VAC

| 140-270VAC

90-135VAC

SW3| Power Saver Auto Setting| Night charger

Function

| Detect load Per 3Secs
SW4| O/P Frequency Setting| 50HZ| 60HZ
SW5| Battery/AC Priority| Utility Priority| Battery Priority

SW1: Low Battery Trip Volt:

• For the 12VDC model, the Low Battery Trip Volt is set at 10.0Vdc by a typical deep cycle lead acid battery.
• It can be customized to 10.5Vdc using SW1 for a sealed car battery, this is to prevent batteries from over-discharging while there is only a small load applied on the inverter. (2 for 24VDC, 4 for 48VDC)

SW2:AC Input Range:

• There are different acceptable AC input ranges for different kinds of loads.
• For some relatively sensitive electronic devices, a narrow input range of 184-253VAC (100-135V for the 120VAC model) is required to protect them.
• While for some resistive loads that work in a wide voltage range, the input AC range can be customized to 154-253VAC (90-135V for 120VAC model), this helps to power loads with the most AC input power without frequent switches to the battery bank.

SW3:Power Saver Auto Setting:

• This cycle can be customized to 3 seconds through the SW3 on the DIP switch.

SW4: Adjust 50hz/60hz

• The output frequency of the inverter can be set at either 50Hz or 60Hz by SW4.
• Kindly remember: 4000W/12V machine doesn’t have this function.

SW5:Solar/AC Priority:

• Our inverter is designed with AC priority by default. This means, that when AC input is present, the battery will be charged first, and the inverter will transfer the input AC to power the load.
• Only when the AC input is stable for a continuous period of 15 days, the inverter will start a battery inverting cycle to protect the battery. After 1 cycle normal charging and AC throughput will be restored.
• The AC Priority and Battery Priority switch is SW5. When you choose battery priority, the inverter will invert from the battery despite the AC input.
• Only when the battery voltage reaches a low voltage alarm point(10.5V for 12V), does the inverter transfer to AC Input, charge the battery, and switch back to the battery when the battery is charged full.
• This function is mainly for wind/solar systems taking utility power as backup.

Transfer

• While in the Standby Mode, the AC input is continually monitored. Whenever AC power falls below the VAC Trip voltage (154 VAC, default setting for 230VAC,90VAC for 120VAC), the inverter automatically transfers back to the Invert Mode with minimum interruption to your appliances – as long as the inverter is turned on. The transfer from Standby mode to Inverter mode occurs in approximately 8 milliseconds. And it is the same time from Inverter mode to Standby mode.
• Though it is not designed as a computer UPS system, this transfer time is usually fast enough to keep your equipment powered up.
• There is a 15-second delay from the time the inverter senses that continuously qualified AC is present at the input terminals to when the transfer is made.
• This delay is built in to provide time for a generator to spin up to a stable voltage and avoid relay chattering. The inverter will not transfer to the generator until it has locked onto the generator’s output.
• This delay is also designed to avoid frequent switching when the input utility is unstable.

Power Saver Mode

• There are 3 different working statuses for LFP inverters: “Power Saver Auto” 、“Power Saver Off” and “Power Off”.
• When the power switch is in the “Unit Off” position, the inverter is powered off.
• When the power switch is turned to either “Power Saver Auto” or “Power Saver Off”, the inverter is powered on.
• The power saver function is designed to conserve battery power when AC power is not or rarely required by the loads.
• In this mode, the inverter pulses the AC output looking for an AC load (i.e., electrical appliance). Whenever an AC load (greater than 25 watts) is turned on, the inverter recognizes the need for power and automatically starts inverting and the output goes to full voltage. When there is no load (or less than 25 watts) detected, the inverter automatically goes back into search mode to minimize energy consumption from the battery bank. In “Power saver on” mode, the inverter will draw power mainly in sensing moments, thus the idle consumption is significantly reduced.
• This cycle can be customized to 3 3-second turn SW3 on the DIP switch.
• Note: The minimum power of load to take the inverter out of sleep mode (Power Saver On) is 25 Watts.
• When in the search sense mode, the green power LED will blink and the inverter will make a ticking sound. At full output voltage, the green power LED will light steadily and the inverter will make a steady humming sound.
• When the inverter is used as an uninterruptible” power supply the search sense mode or “Power Saver On” function should be defeated.

Exceptions

• Some devices when scanned by the load sensor cannot be detected. Small fluorescent lights are the most common example. (Try altering the plug polarity by turning the plug over.)
• Some computers and sophisticated electronics have power supplies that do not present a load until line voltage is available. When this occurs, each unit waits for the other to begin.
• To drive these loads either a small companion load must be used to bring the inverter out of its search mode, or the inverter may be programmed to remain at full output voltage.

Protections

• The LFP series inverter is equipped with extensive protection against various harsh situations/faults.

These protections include:

• AC Input over-voltage protection/AC Input low voltage protection
• Low battery alarm/High battery alarm
• Over temperature protection/Overload protection
• Short Circuit Protection (1s after fault)
• Back feeding protection
• When Over temperature /Overload occurs, after the fault is cleared, the master switch has to be reset to restart the inverter.
• The Low battery voltage trip point can be customized from the default value of 10VDC to 10.5VDC through the SW1 on the DIP switch.
• The inverter will go to temp protection when the heat sink temp. ≥105ºC, and go to Fault (shutdown Output) after 30 seconds. The switch has to be reset to activate the inverter.
• The LFP series Inverter has back feeding protection which avoids presenting an AC voltage on the AC input terminal in Invert mode.
• After the reason for the fault is cleared, the inverter has to be reset to start working.

LED Indicator & LCD

SHORE POWER ON| GREEN LED lit in AC Mode
INVERTER ON| GREEN LED lit in Inverter Mode
FAST CHARGE| Yellow LED lit in Fast Charging Mode
FLOAT CHARGE| GREEN LED lit in Float Charging Mode
OVER TEMP TRIP| RED LED lit in Over Temperature
OVERLOAD TRIP| RED LED lit in Over Load
**** POWER SAVER ON| GREEN LED lit in Power Saver Mode (Power Saver Load ≦25W)

Table 2.5.8 LCD Indicator

1. Greeting message
2. AC Status & Input Voltage AC: abnormal will be displayed when AC input is not qualified.
3. Output Voltage/Frequency and Battery voltage
4. Output Current( in percentage)

Automatic Voltage Regulation(Optional)

• The automatic voltage regulation function is for the full series of LFP Pure Sine Wave Inverter/ Charger except for split phase models including LFP 1000W~6000W.
• Instead of simply bypassing the input AC to power the loads, the LFP series inverter stabilizes the input AC voltage to a range of 230V/120V±10%.
• Connected with batteries, the LFP Series inverter will function as a UPS with a max transfer time of 10 ms. With all the unique features our inverter provides, it will bring you long-term trouble-free operation beyond your expectations.

Function Introduction

OIS Function

| OIS
---|---
LV (NA/JPN)| HV (INTL)
Acceptable Input Voltage Range (Vac)| 0-160| 0-300
Nominal Input Voltages (Vac)| 100| 110| 120| 220| 230| 240
(A) Line low loss N/W (On battery)| 75/65| 84/72| 92/78| 168/143| 176/150| 183/156
(B) Line Low comeback N/W (On Boost)| 80/70| 89/77| 97/83| 178/153| 186/160| 193/166
(C) Line 2nd boost threshold (On Boost)| | | | | |
(D) Line 2nd boost comeback (On Normal)| | | | | |
(E) Line 1st boost threshold (On Boost)| 90| 99| 108| 198| 207| 216
(F) Line 1st boost comeback (On Normal)| 93| 103| 112| 205| 215| 225
(G) Line buck comeback (On Normal)| 106| 118| 128| 235| 246| 256
(H) Line buck threshold (On Buck)| 110| 121| 132| 242| 253| 264
(I) Line high comeback (On Buck)| 115| 127| 139| 253| 266| 278
(J) Line high loss (On Battery)| 120| 132| 144| 263| 276| 288

LCD Display Details

Connection Diagram

LCD Display Detail

1. Shore/ Generator voltage
2. DC voltage on inverter
3. Load when inverting %
4. Low/high voltage, over temp, overload
5. Fault condition
6. AC Output voltage
7. Output frequency
8. Bypass (online) / inverter mode
9. Battery state of charge graph

• WARNING Never cut the telephone cable when the cable is attached to an inverter and the battery is connected to the inverter.
• Even if the inverter is turned off. It will damage the remote PCB inside if the cable is short-circuited during cutting.

Audible Alarm

Table 2.5.9 OIS Series Audible Alarm Spec

Battery Voltage Low| The inverter’s green LED is lit, and the buzzer beeps 0.5s every 5s.
---|---
Battery Voltage High| The Inverter green LED lit, and the buzzer beeps 0.5s every 1s and Fault after 60s.
**Invert Mode Over-Load**| (1) 110%<load<125%(±10%), No audible alarm in 14 minutes, Beeps 0.5s every 1s in 15th minute and Fault after 15 minutes;

(2) 125% <load<150%(±10%), Beeps 0.5s every 1s and Fault after 60s;

(3) Load>150%(±10%), Beeps 0.5s every 1s and Fault after 20s;

Over Temperature| Heatsink temp. ≥105ºC, Over temp red LED Lighting, beeps 0.5s every 1s;

FAN Operation

• For 1-3KW,4KW 24V/48V there is one multiple controlled DC fan which starts to work according to the following logic.
• For 4KW 12V and 6KW, there are two multiple controlled DC fans, the DC fan at the DC terminal side will work in the same way as the one on 1-3KW.
• So when the inverter is in power saver mode, the AC fan will work from time to time in response to the pulse sent by the inverter in power saver mode.
• The Operation of the DC fan at the DC terminal side is controlled by the following logic (Refer to Table 2.5.10):

Table 2.5.10 OIS Series Fan Operation Logic

LOAD% (INV MODE)

| Load < 30%| Load ≥ 30%| OFF
30% ≤ Load < 50%| Load ≤ 20% / Load ≥ 50%| 50%
Load ≥ 50%| Load ≤ 40%| 100%

• Allow at least 30CM of clearance around the inverter for airflow. Make sure that the air can circulate freely around the unit.
• Variable speed fan operation is required in invert and charge mode. This is to be implemented in such a way as to ensure high reliability and safe unit and component operating temperatures in an operating ambient temperature of up to 50°C.
• Speed to be controlled smoothly as a function of internal temperature and/or current.
• The fan should not start/stop suddenly.
• The fan should run at the minimum speed needed to cool the unit.
• Fan noise level target <60db at a distance of 1m.

Other features

Battery Temperature Sensing

• Applying the proper charge voltage is critical for achieving optimum battery performance and longevity.
• The ideal charge voltage required by batteries changes with battery temperature.
• The battery temperature sensor allows the charge controller to continuously adjust the charge voltage based on the actual battery temperature.
• Temperature compensation of charge voltage assures that the battery receives the proper charge voltage as battery temperature varies.
• The entire line is equipped with Battery Temperature Sensing for increased charging precision.
• It sends precise information to the charger, which automatically adjusts voltage to help ensure a full battery charge depending on the ambient temperature of your battery installation.
• When the battery voltage is over 40℃(104℉), it will reduce the charging voltage by 0.1Vdc with every degree of temperature rise.
• We recommend that you install Battery Temperature Sensors on all banks to protect your batteries and provide optimal charging for each bank.
• The battery temperature sensor mounts on the side of a battery.

The specification is as below

0.5Vdc
BTS ≥ 122℉| Over-Temp Fault

• A Battery Temperature Sensor has been provided as a separate accessory. It comes with a 32.8’/10m cable.

Battery voltage recovery start

• After low battery voltage shut off (10V for 12V model/20V for 24V model/40V for 48V model), the inverter can restore operation after the battery voltage recovers to 13Vdc/26Vdc/52Vdc (with the power switch still in the “On” position).
• This function helps to save the users extra labor to reactivate the inverter when the low battery voltage returns to an acceptable range in renewable energy systems.
• The built-in battery charger will automatically reactivate as soon as the city/generator AC has been stable for 15 seconds.

WARNING

• Never leave the loads unattended, some loads (like a Heater) may cause accidents in such cases.
• It is better to shut everything down after a low-voltage trip than to leave your load on, due to the risk of fire.

Auto Gen Start

• The inverter can be customized to start up a generator when the battery voltage goes low.
• When the inverter goes to a low battery alarm, it can send a signal to start a generator and turn the generator off after battery charging is finished. (Generator must have auto start function.)
• The auto-gen start feature will only work with generators designed to work with this feature. There is an open/close relay that will short-circuit the positive and negative cable from a generator.
• The input DC voltage can vary, but the maximum current the relay can carry is 16Amp.

Conformal Coating

• The entire line of inverters has been processed with a conformal coating on the PCB, making it water, rust, and dust-resistant.
• While these units are designed to withstand corrosion from the salty air, they are not splashproof

Installation

Location

• Follow all the local regulations to install the inverter.
• Please install the equipment in a location that is Dry, Clean, Cool and that has good ventilation.
• Working temperature: ‐10℃‐40℃
• Storage temperature: ‐40‐70℃
• Relative Humidity: 0%‐95%，non-condensing
• Cooling: Forced air

DC Wiring recommendation

• It is suggested the battery bank be kept as close as possible to the inverter. The following table is a suggested wiring option for 3 3-meter DC cables.
• Please find the following minimum wire size. In case of a DC cable longer than 3m, please increase the cross-section of the cable to reduce the loss.

• Please follow the above minimum wire size requirement.
• One cable is always best, but if there is a problem obtaining the recommended size or larger cable, multiple smaller cables will work.
• The performance of any product can be improved by thicker cables and shorter runs, so if in doubt round up and keep the length as short as possible.

AC Wiring

• We recommend using 10 to 6Awg wire to connect to the AC terminal block.
• When in AC mode the AC input power will supply both the loads and AC charger, a thicker wire gauge for
• AC Input is required. Please consult a qualified electrician about the specific wire gauge required in terms of wire material and inverter power.
• There are 3 different ways of connecting to the terminal block depending on the model. All the wirings are CE compliant, Call our tech support if you are not sure about how to wire any part of your inverter.

WARNING

• For split phase models, AC input neutral is not required in wiring. Never Connect Input Neutral to Output Neutral.
• Damage will result which is not covered under warranty.
• The output voltage of this unit must never be connected to its input AC terminal, overload or damage may result.
• Always switch on the inverter before plugging in any appliance.

Grounding

• Connect an AWG 8 gauge or greater copper wire between the grounding terminal on the inverter and the earth grounding system or the vehicle chassis.

Automatic Neutral-to-Ground Connection

• All single-phase 120Vac inverters are equipped with an automatic neutral-to-ground switch.
• These inverters use an internal relay that automatically connects the AC neutral output to the vehicle/ship’s safety ground in inverter mode and cuts off when it is connected to a qualified external AC power source.
• This design avoids the simultaneous existence of two neutral-to-ground connections, thereby avoiding the risk of shock hazard between the vehicle/boat’s neutral and the external AC source’s neutral.

Disabling the Automatic Neutral-to-Ground Connection

• In some installations, this function must be disabled.
• To accommodate these situations, the automatic neutral-to-ground system can be defeated, so the neutral will not be bonded in any operating mode.
• If you are not sure whether you must disable this function, please refer to the local code requirements. There is a section of green wire with the insulated connector at the left side of the AC terminal block. The insulated connector connects the neutral wire and the ground wire inside the inverter during inverting. Pull two ends of the insulated connector apart to separate the green wire; this will prevent the neutral and ground wires from being connected to the inside of the inverter.
• If possible, please use tape to insulate the disconnected ends, separate the ends from each other, and push back out of the way. Typically when connecting to the house panel (after disconnecting city power from it), it is when you want to disconnect this connection as the house panel already has the neutral-to-ground bond. Normally in a standalone system or a vehicle, you need to maintain this connection.

Install Flange

Troubleshooting Guide

• Troubleshooting contains information about how to troubleshoot possible error conditions while using the LFP Series Inverter & Charger.
• The following chart is designed to help you quickly pinpoint the most common inverter failures.

Indicator and Buzzer For LFP

 |  | Indicator on the top cover| LED on Remote Swit|
---|---|---|---|---
**Status| ****Item**| SHOR E POWE R

ON

| INVERT ER ON| FAST CHG| FLOAT CHG| OVER TEMP TRIP| OVERLOAD TRIP| POWER SAVER ON| BATT CHG| INVERTED R| Alarm| **** Buzzer

Line Mode

| CC| √| ×| √| ×| ×| ×| ×| √| ×| ×| ×
CV| √| ×| √, blink| ×| ×| ×| ×| √| ×| ×| ×
Float| √| ×| ×| √| ×| ×| ×| √| ×| ×| ×
Standby| √| ×| ×| ×| ×| ×| ×| ×| ×| ×| ×
Inverter Mode| Inverter On| ×| √| ×| ×| ×| ×| ×| ×| √| ×| ×
Power

Saver

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

√

| ****

×

| ****

×

| ****

×

| ****

×

Inverter Mode

| Battery

Low

| ****

×

| ****

√

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

√

| ****

√

| Beep 0.5s

every 5s

Battery

High

| ****

×

| ****

√

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

√

| ****

√

| Beep 0.5s

every 1s

Overload

On Invert Mode

| ****

×

| ****

√

| ****

×

| ****

×

| ****

×

| ****

√

| ****

×

| ****

×

| ****

√

| ****

√

| Refer to

“Audible alarm”

Over-Temp

On Invert Mode

| ****

×

| ****

√

| ****

×

| ****

×

| ****

√

| ****

×

| ****

×

| ****

×

| ****

√

| ****

√

| ****

Beep 0.5s every 1s

Over-Temp

On Line Mode

| ****

√

| ****

×

| ****

√

| ****

×

| ****

√

| ****

×

| ****

×

| ****

√

| ****

×

| ****

√

| ****

Beep 0.5s every 1s

Over

Charge

| ****

√

| ****

×

| ****

√

| ****

×

| ****

×

| ****

×

| ****

×

| ****

√

| ****

×

| ****

√

| Beep 0.5s

every 1s

Fault Mode

| ****

Fan Lock

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| Beep

continuous

Battery

High

| ****

×

| ****

√

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

√

| ****

×

| Beep

continuous

Inverter

Mode Overload

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

√

| ****

×

| ****

×

| ****

×

| ****

×

| ****

Beep continuous

Output

Short

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

√

| ****

×

| ****

×

| ****

×

| ****

√

| Beep

continuous

Over-Temp

| ****

×

| ****

×

| ****

×

| ****

×

| ****

√

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| Beep

continuous

Over

Charge

| ****

×

| ****

×

| ****

√

| ****

×

| ****

×

| ****

×

| ****

×

| ****

√

| ****

×

| ****

×

| Beep

continuous

Back Feed

Short

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| ****

×

| Beep

continuous

Indicator and Buzzer For LFP

 |  | LED Indicators on the top cover| LEDs on the Remote Switch|
---|---|---|---|---

Status

| ****

Item

| POWER

SAVER

| OVER

LOAD

| OVER

TEMP

| UNIT

ALARM

| FLOAT

CHG

| FAST

CHD

| INVERSE

R MODE

| LINE

MODE

| BATT

CHG

| INVER

TER

| ****

Alarm

| ****

Buzzer

 |  | 1| 2| 3| 4| 5| 6| 7| 8| 1| 2| 3|

Line Mode

| CC|  |  |  |  |  | √|  | √| √|  |  |
CV|  |  |  |  |  | √ , Flash|  | √| √|  |  |
Float|  |  |  |  | √|  |  | √| √|  |  |
Standby|  |  |  |  |  |  |  | √|  |  |  |
Inverter

Mode

| Inverter On|  |  |  |  |  |  | √|  |  | √|  |
Power Saver| √|  |  |  |  |  |  |  |  |  |  |

Inverter Mode

| ****

Battery Low

|  |  |  | √|  |  | √|  |  | √| √| Beep 0.5s

every 5s

Battery High

|  |  |  | √|  |  | √|  |  | √| √| Beep 0.5s

every 1s

Overload On Invert Mode

|  | ****

√

|  | ****

√

|  |  | ****

√

|  |  | ****

√

| ****

√

| Refer to

“Audible alarm”

Over-Temp

On Invert Mode

|  |  | ****

√

| ****

√

|  |  | ****

√

|  |  | ****

√

| ****

√

| ****

Beep 0.5s every 1s

Over-Temp

On-Line Mode

|  |  | ****

√

| ****

√

|  | ****

√

|  | ****

√

| ****

√

|  | ****

√

| ****

Beep 0.5s every 1s

Over Charge

|  |  |  | √|  | √|  | √| √|  | √| Beep 0.5s

every 1s

Fault Mode

| ****

Fan Lock

|  |  |  |  |  |  |  |  |  |  |  | Beep

continuous

Battery High

|  |  |  |  |  |  | √|  |  | √|  | Beep

continuous

Inverter

Mode Overload

|  | ****

√

|  |  |  |  |  |  |  |  |  | ****

Beep continuous

Output Short

|  |  |  |  |  |  |  |  |  |  |  | Beep

continuous

Over-Temp

|  |  | √|  |  |  |  |  |  |  |  | Beep

continuous

Over Charge

|  |  |  |  |  | √|  |  | √|  |  | Beep

continuous

Back Feed

Short

|  |  |  |  |  |  |  |  |  |  |  | Beep

continuous

The reason for the noise from the transformer and/or case

• When in inverter mode the transformer and/or case of the inverter sometimes may vibrate and make noise.
• The noise may come from the transformer.
• According to the characteristics of our inverter, there is one type of load that will most likely cause rattles in a transformer, that is a half-wave load, a load that uses only a half cycle of the power(see figure 1).
• This tends to cause an imbalance of the magnetic field of a transformer, reducing its rated working freq from 20KHz to, say, maybe 15KHz (it varies according to different loads).
• This way, the frequency of noise falls exactly into the range (200Hz-20KHz) that the human ear can sense.
• The most common load of such kind is hair drier.
• If the noise comes from the case.
• Normally when loaded with inductive loads, the magnetic field generated by the transformer keeps attracting or releasing the steel case at a specific frequency, this may also cause noise.
• Reducing the load power or using an inverter with a bigger capacity will normally solve this problem.
• The noise will not do any harm to the inverter or the loads.

Appendix 1

Inverter & AC Charger

Electrical Specifications
 | Model| 1KW| 1.5KW| 2KW| 3KW| 4KW| 5KW| 6KW
**** Inverter Output| Continuous Output Power| 1000W| 1500W| 2000W| 3000W| 4000W| 5000W| 6000W
Surge Rating(20s)| 3000W| 4500W| 6000W| 9000W| 12000W| 15000W| 18000W
Capable of Starting

Electric Motor

| 1HP| 1.5HP| 2HP| 3HP| 4HP| 5HP| 6HP
Output Waveform| Pure Sine wave/Same as input(Bypass mode)
Nominal Efficiency| >88%(Peak)
Line Mode Efficiency| >95%
Power Factor| 0.9-1.0
Nominal Output Voltage rms| 100-110-120Vac / 220-230-240Vac
Output Voltage Regulation| ±10% RMS
Output Frequency| 50/60Hz ± 0.3Hz
Short Circuit Protection| Yes, Current Limit Function (Fault after 1sec)
Typical transfer Time| 10ms(Max)
THE| < 10%
DC Input| Nominal Input Voltage| 12.0Vdc
( 2 for 24Vdc, 4 for 48Vdc)
Minimum Start Voltage| 10.0Vdc
Low Battery Alarm| 10.5Vdc / 11.0Vdc
Low Battery Trip| 10.0Vdc / 10.5Vdc
High Voltage Alarm & Fault| 16.0Vdc
High DC Input Recovery| 15.5Vdc
Low Battery voltage recovers| 13.0Vdc
Idle Consumption-Search Mode| < 25 W when Power Saver On
 | Input Voltage Range| Narrow: 100~135VAC / 194~243VAC; Wide: 90~135VAC / 164~243VAC;
Input Frequency Range| Narrow: 47-55±0.3Hz for 50Hz, 57-65±0.3Hz for 60Hz

Wide:43±0.3Hz plus for 50Hz/60Hz

Output Voltage| Depends on battery type
Charger Breaker Rating (230Vac)| 10A| 10A| 10A| 20A| 20A| 30A| 30A
Charger Breaker Rating (120Vac)| 10A| 20A| 20A| 30A| 40A| N/A| N/A
Over Charge Protection Shutdown| 15.7V for 12Vdc ( 2 for 24Vdc, 4 for 48Vdc)
**** Charge| Battery type| Fast Vdc| Float Vdc
---|---|---|---
Gel U.S.A| 14.0| 13.7
A.G.M 1| 14.1| 13.4
Lithium| 13.8| 13.6
Sealed Lead Acid| 14.4| 13.6
Gel Euro| 14.4| 13.8
Open Lead Acid| 14.8| 13.3
LiFePO4| 14.0| 13.8
De-sulphation| 15.5 for 4hrs
Classic LFP| 13.6| 13.5
Remote Control| Yes. Optional
 Bypass & Protection| Input Voltage

Waveform

| Sine wave (Grid or Generator)
Nominal Voltage| 120Vac| 230Vac
Low Voltage Trip| 80V/90V±4%| 184V/154V±4%
Low Voltage re-engage| 90V/100V±4

%

| 194V/164V±4%
High Voltage Trip| 140V±4%| 253V±4%
High Voltage re-engage| 135V±4%| 243V±4%
Max Input AC Voltage| 150VAC| 270VAC
Nominal Input

Frequency

| 50Hz or 60Hz (Auto detect)
Low Freq Trip| Narrow: 47±0.3Hz for 50Hz, 57±0.3Hz for 60Hz

Wide:40±0.3Hz for 50Hz/60Hz

Low Freq re-engage| Narrow: 48±0.3Hz for 50Hz, 58±0.3Hz for 60Hz

Wide:45±0.3Hz for 50Hz/60Hz

High Freq Trip| Narrow: 55±0.3Hz for 50Hz, 65±0.3Hz for 60Hz

Wide: No up limit for 50Hz/60Hz

High Freq re-engage| Narrow: 54±0.3Hz for 50Hz, 64±0.3Hz for 60Hz

Wide: No up limit for 50Hz/60Hz

Baypass Breaker Rating (230Vac)| 10A| 15A| 20A| 30A| 30A| 40A| 40A
Baypass Breaker Rating (120Vac)| 20A| 20A| 30A| 30A| 40A| N/A| N/A
Output Short circuit

protection

| Circuit breaker
*** Mechanical Specification| Mounting| Wall mount
Inverter Dimensions(LWH)| 362242198mm| 505242198mm| 597242198mm
Inverter Weight| 16KG| 17KG| 20KG| 24KG| 35KG| 45KG| 45KG
Shipping Dimensions(LW*H)| 520x320x310mm| 670x320x310mm| 760x320x310mm
Shipping Weight| 18KG| 19KG| 22KG| 26KG| 37KG| 47KG| 47KG
Display| Status LEDs
Standard Warranty| 1 Year

Installation Diagram

• Sun Gold Power Inc
• Email:sales@sungoldpower.com

References

• Home Solar System Kit,Power Inverter,Solar Inverter,Off Grid Inverter

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