SGP LFP Series Pure Sine Wave Inverter/Charger User Manual

**SGP LFP Series Pure Sine Wave Inverter/Charger User Manual

**

Important Safety Information

WARNING!

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

General Safety Precautions

Do not expose the Inverter to rain, snow, spray, bilge or dust. To reduce 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 air flow. Make sure that the air can circulate freely around the unit. A minimumair flow 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 which can produce arcs or sparks. To prevent fire or explosion do not install in compartments containing batteries or flammable materials or in location which require ignition protected equipment.

This includes any space containing gasoline-powered machinery, fuel tanks, or joints, fittings, or other connection between components of the fuel
system. See Warranty for instructions on obtaining service.

Do not dis-assemble the

Inverter/Charger. It contains no user serviceable parts. Attemptingtoservice 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 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 Acinus.

Warning: Limitations On Use

SPECIFICALLY, PLEASE NOTE THAT THE LFP SERIES INVERTER/CHARGERSHOULDNOT BE USED IN CONNECTION WITH LIFE SUPPORT SYSTEMS OR OTHERMEDICALEQUIPMENT OR DEVICES.

Precautions When Working with Batteries

If battery acid contacts skin or clothing, wash immediately with soap and water. If acid enters eye, immediately flood eye with running cold water for at least 20 minutes and get medical attention immediately.
Never smoke or allow a spark or flame in vicinity of battery or engine.

Do not drop a metal tool on the battery. The resulting spark or short-circuit on the battery of other
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 corrected, sophisticated multi-stage charging and pure sine wave output with unprecedentedly high surge capability to meet 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 utilityis restored, the relay is energized and the load is automatically reconnected to AC utility.

The LFP Series Inverter is equipped with a powerful charger of up to 1 10Amps (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 system, 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 Harsh Environment
• DC Start & Automatic Self-DiagnosticFunction
• Compatible with Both Linear & Non-LinearLoad
• Easy to Install & Easy to Operate & Easy toSolve
• 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 FlatBatteries
• 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

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 in order to obtain a power factors close as possible to 1. Unlike other inverters whose max charging current decreases according to the input AC voltage, LFP series charger is able to output max current as long as 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 is with a strong charging current of 120Amp (for 4KW,12V), and the maxcharge current can be adjusted from 0%-100% via a liner switch at the right of the battery type selector. This will behelpful if you are using our powerful charger on a small capacity battery bank. Fortunately, the liner switchman effectively reduce the max charging current to 20% of its peak. Choosing “0” in the battery type selector will disable 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 controlled constant current. The charger will remain in Bulk charge until the Absorption charge voltage (determined by the Battery Type selection) is achieved.

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 TO and TO×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 in order 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 fl oat 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/24Vde/48Vde, the charger will reset the cycle above.

maintains the float state for 10 days, the charger will deliberately reset the cycle to protect the battery.
15 Table 2.5.1 Battery Charging Processes

8

|

De-sulphation

|

15.5 for   4hrs

9

|

Classic LFP

|

13.6

|

13.5

SW1: Low Battery Trip Volt:

For 12VDC model, the Low Battery Trip Volt is set at 10.0Vdc by typical deep cycle lead acidbattery. Itcan be customized to 10.5Vdc using SW1 for sealed car battery, this is to prevent batteries fromover-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
120VAC model) is required to protect them.
While for some resistive loads which 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 reminder: 4000W/12V machine doesn’t have this function.

SW5:Solar/AC Priority:

Our inverter is designed with AC priority by default. This means, 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 through put will be restored.

The AC Priority and Battery Priority switch is SW5. When you choose battery priority, the inverter will
inverting from battery despite the AC input. Only when the battery voltage is reaches low voltage alarm
point(10.5V for 12V), the inverter transfers to AC Input, charges battery, and switches back to battery when
battery is charged full. This function is mainly for wind/solar systems taking utility power as back up.

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 generator until it has locked
onto the generator’s output. This delay is also designed to avoid frequent switching when input utility is unstable.

Power Saver Mode

There are 3 different working status for LFP inverter: “Power Saver Auto” 、“Power Saver Off” and “Power Off”.

When power switch is in “Unit Off” position, the inverter is powered off.

When power switch is turned to either of “Power Saver Auto” or “Power Saver Off”, the inverter is powered on.

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 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 seconds turn SW3 on the DIP switch.

• Power saver on

• Power saver off

• Power saver on (Load detected

Note: The minimum power of load to take 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 protections 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/Over load protection Short Circuit protection (Is after fault)

Back feeding protection

When Over temperature /Over load occur, after the fault is cleared, the master switch has to be reset to restart the inverter.

The Low batter voltage trip point can be customized from defaulted value 10VDC to 10.5VDC thru the SW on DIP switch.

The inverter will go to Over temp protection when heat sink temp. ≥105°C, 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 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 ModeFLOAT CHARGE GREEN LED lit in Float Charging Mode OVER TEMP: TRIP RED LED lit in Over Temperature
OVER LOAD TRIP : RED LED lit in Over Load
POWER SAVER ON: GREEN LED lit in Power Saver Mode (Power Saver Load ≦25W)

1. Greeting message
   Welcome To xxxxx

2. AC Status &Input Voltage
   AC: normal I/P-V:230V

3. Output Voltage/Frequency and Battery voltage
   AC: normal I/P-V:230V
   “AC: abnormal” will be displayed when AC input is not qualified

4. Output Current( in percentage)
   O/P Current:100%

Automatic Voltage Regulation(Optional)

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

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

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

Even if the inverter is turned off. It will damage the remote PCB inside if the cable is short circuited during cutting.

Audible Alarm

Battery Voltage Low| Inverter green LED lit, and the buzzer beeps 0.5s every 5s.
---|---
Battery Voltage High| 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 is two multiple controlled DC fan, the DC fanart the DCt 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 toTable2.5.10):

Allow at least 30CM of clearance around the inverter for air flow. 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 up to 50°C.

• Speed to be controlled in a smooth manner as a function of internal temperature and/or current.
• Fan should not start/stop suddenly.
• Fan should run at minimum speed needed to cool unit.
• Fan noise level target <60db at a distance of Im.

Other features

The battery temperature sensor allows the charge controller to continuously adjust charge voltage based on 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 full battery charge depending on the ambient temperature of your battery installation.
When the battery voltage is over 40°C(104°F), it will reduce the charging voltage by 0.1Vde with every degree of temperature rise.
We recommend that you install Battery Temperature Sensors on all banks to protect your batteries and to provide optimal charging of 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 32.8’/10m cab.

Battery voltage recover start

After low battery voltage shut off (10V for 12V model/20V for 24V model/40V for 48Vmodel), the inverters able to restore operation after the battery voltage recovers to 13Vdc/26Vdc/52Vdc (with power switch stillin 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 the renewable energy systems. The built in battery charger will automatically reactivate as soon as city/generator ac has been stable for 15 seconds.

WARNING

Never leave the loads unattended, some loads (like a Heater) may cause accident in such cases. It is better to shut everything down after 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 battery voltage goes low. When the inverter goes to 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 Max current the relay can carry is 16Amp Conformal Coating.

The entire line of inverters have 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 splash proof

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 able is a suggested wiring option for 3 meter DC cable. Please find the following minimum wire size. In case of DC cable longer than 3m, please increase the cross section of 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. Performance of any product can be improved by thicker cable and shorter runs, so if indebt roundup 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.

Wiring Option 1

230V single phase/120V single phase
Input: Hot line +Neutral +Ground
Output: Hot line+ Neutral+ Ground

**Wiring Option 2

**

230V split phase
Input: Hot line+ Hot line +Ground
Output: Hot line+ Hot line +Neutral

**Wiring Option 3

**

230V split phase
Input: Hot line Hot line +Ground
Output: Hot line +Neutral
Remark: In such cases, each output hotline can only carry a max of half the rated capacity.

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.

WARNING

**** The output voltage of this unit must never be connected in 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.

In order to accommodate to 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 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 in 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 top cover| LED on Remote Swit|
---|---|---|---|---
**Status| ****Item| SHOR E POWE RON| ** INVERT ER ON| FAST CHG| FLOAT CHG| OVER TEMP TRIP| OVER LOAD TRIP| POWER SAVER ON| BATT CHG| INVERTE R| Alarm| Buzzer
Line Mode| CC| √| ×| √| ×| ×| ×| ×| √| ×| ×| ×
CV| √| ×| √, blink| ×| ×| ×| ×| √| ×| ×| ×
Float| √| ×| ×| √| ×| ×| ×| √| ×| ×| ×
Standby| √| ×| ×| ×| ×| ×| ×| ×| ×| ×| ×
Inverter Mode| Inverter On| ×| √| ×| ×| ×| ×| ×| ×| √| ×| ×
Power Saver| ×| ×| ×| ×| ×| ×| √| ×| ×| ×| ×
Inverter Mode| Battery Low| ×| √| ×| ×| ×| ×| ×| ×| √| √| Beep 0.5severy 5s
BatteryHigh| ×| √| ×| ×| ×| ×| ×| ×| √| √| Beep 0.5severy 1s
OverloadOn Invert Mode| ×| √| ×| ×| ×| √| ×| ×| √| √| Refer to“Audible alarm”
Over-TempOn Invert Mode| ×| √| ×| ×| √| ×| ×| ×| √| √| Beep 0.5s every 1s
Over-TempOn Line Mode| √| ×| √| ×| √| ×| ×| √| ×| √| Beep 0.5s every 1s
Over Charge| √| ×| √| ×| ×| ×| ×| √| ×| √| Beep 0.5severy 1s
Fault Mode| Fan Lock| ×| ×| ×| ×| ×| ×| ×| ×| ×| ×| Beep continuous
Battery High| ×| √| ×| ×| ×| ×| ×| ×| √| ×| Beep continuous
InverterMode Overload| ×| ×| ×| ×| ×| √| ×| ×| ×| ×| Beep continuous
OutputShort| ×| ×| ×| ×| ×| √| ×| ×| ×| √| Beep continuous
Over-Temp| ×| ×| ×| ×| √| ×| ×| ×| ×| ×| Beep continuous
OverCharge| ×| ×| √| ×| ×| ×| ×| √| ×| ×| Beep continuous
Back Feed Short| ×| ×| ×| ×| ×| ×| ×| ×| ×| **** ×| Beep continuous

Indicator and Buzzer For LFP

connections. Check DC fuse andbreaker.
| Low battery voltage.|
| | Charge the battery.
No AC output voltage and no indicator lights ON.| Inverter has been manually transitioned to OFF mode.| Press the switch to Power saver on or Power saver off position.
AC output voltage is low and theinverter turns loads OFF in a short time.| *** Low battery.| Check the condition of the batteries and recharge if possible.
Charger is inoperative and unit will not accept AC.| AC voltage has dropped out-of-tolerance| Check the AC voltage for proper voltage and frequency.
Charger is supplying a lower| Charger controls are improperly| Refer to the section on adjusting
charge rate.| set.| the “Charger Rate”.
| Low AC input voltage.| Source qualified AC power..
| Loose battery or AC input connections.| Check all DC /AC connections.
| | Load the generator down with a
Charger turns OFF while charging| High AC input voltages from the| heavy load.
from a generator.| generator.| Turn the generator output voltage
| | down.
Sensitive loads turn offtemporarily when transferring between grid and inverting.| Inverter’s Low voltage trip voltagemay be too low to sustain certain loads.| Choose narrow AC voltage in theDIP switch, or Install a UPS if possible.
Noise from Transformer/case| Applying specific loads such as hair drier| Remove the loads

When in inverter mode and the transformer and/or case of the inverter sometimes may vibrate and mak enoise.

The noise may come from transformer. According to the characteristics of our inverter, there is one type of load which will most like lytoca user battles of transformer, that is a half-wave load, load that uses only a half cycle of the power(see figure1).This trends to cause imbalance of magnetic field of transformer, reducing its rated working freqfrom20KHz to, say, maybe 15KHz (it varies according to different loads).

This way, the freq of noisefallsexactly into the range (200Hz-20KHz) that human ear can sense. The most common load of such kind is hair drier

If the noise comes from case. Normally when loaded with inductive loads, the magnetic field generated by transformer keeps attracting or releasing the steel case at a specific freq, this may also cause noise. Reducing the load power or using an inverter with 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| 4KW| 6KW
**** Inverter Output| Continuous Output Power| 4000W| 6000W
Surge Rating(20s)| 12000W| 18000W
Capable of Starting Electric Motor| 4HP| 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)
THD| < 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 recover| 13.0Vdc
Idle Consumption-Search Mode| < 25 W when Power Saver On
**** Charge| 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)| 20A| 30A
Charger Breaker Rating (120Vac)| 40A| N/A
Over Charge Protection Shutdown| 15.7V for 12Vdc ( 2 for 24Vdc, 4 for 48Vdc)
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

Appendix 2 – 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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