Growatt SPF 3000TL LVM Manual

Introduction

This is a multifunctional off grid solar inverter, integrated with a MPPT solar charge controller, a high frequency pure sine wave inverter and a UPS function module in one machine, which is perfect for off grid backup power and self-consumption applications. The transformerless design provides reliable power conversion in compact size.
The whole system also need other devices to achieve complete running such as PV modules, generator, or utility grid. Please consult with your system integrator for other possible system architectures depending on your requirements. The WiFi/GPRS module is a plug-and-play monitoring device to be installed on the inverter. With this device, users can monitor the status of the PV system from the mobile phone or from the website anytime anywhere.

Features

• 24V/48V battery system
• Pure sine wave output 3KW
• Inbuilt MPPT 80A
• High frequency inverter with small size and light weight
• Overload, short circuit and deep discharge protection
• Compatible to mains voltage or generator power
• Parallel operation up to 6 unit
• With CAN/RS485 for BMS communication
• WIFI/ GPRS remote monitoring (optional)

Product Overview

1. LCD display
2. Status indicator
3. Charging indicator
4. Fault indicator
5. Function buttons

6. AC input
7. WiFi/GPRS communication port
8. USB communication port
9. Dry contact
10. PV input
11. Power on/off switch
12. Battery input
13. Parallel communication ports (only for parallel model)
14. Current sharing ports (only for parallel model)
15. AC output
16. Circuit breaker
17. BMS communication port(support CAN/RS485 protocol)
18. RS485 communication port (for expansion)

Installation

Unpacking and Inspection

Before installation, please inspect the unit. Be sure that nothing inside the package is damaged. You should have received the following items in the package:

• The unit x 1
• User manual x 1
• USB Communication cable x 1
• Software CD x 1
• Current sharing cable (parallel model available)
• Parallel communication cable (parallel model available)

Preparation

Before connecting all wiring, please take off bottom cover by removing two screws as shown below.

Mounting the Unit

Consider the following points before selecting where to install:

• Do not mount the inverter on flammable construction materials.
• Mount on a solid surface
• Install this inverter at eye level in order to allow the LCD display to be read at all times.
• The ambient temperature should be between 0°C and 55°C to ensure optimal operation.
• The recommended installation position is to be adhered to the wall vertically.
• Be sure to keep other objects and surfaces as shown in the right diagram to guarantee sufficient heat dissipation and to have enough space for removing wires.
  SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE NLY.

Install the unit by screwing three screws. It's recommended to use M4 or M5 screws.

Battery Connection

Lead-acid Battery Connection

User can choose proper capacity lead acid battery with a nominal voltage at 48V for 48V model and at 24V for 24 model. You need to choose battery type as "AGM(default) or FLD".

For safety operation and regulation compliance, it's requested to install a separate DC over-current protector or disconnect device between battery and inverter. It may not be requested to have a disconnect device in some applications, however, it's still requested to have over-current protection installed. Please refer to typical amperage in below table as required fuse or breaker size.

All wiring must be performed by a qualified person.

It's very important for system safety and efficient operation to use appropriate cable for battery connection. To reduce risk of injury, please use the proper recommended cable and terminal size as below.

Ring terminal:

Recommended battery cable and terminal size:

Note: for lead acid battery, the recommended charge current is 0.2C (C → battery capacity)
Please follow below steps to implement battery connection:

1. Assemble battery ring terminal based on recommended battery cable and terminal size.
2. Connect all battery packs as units requires. It's suggested to connect at least 100Ah capacity battery for 3KVA/48V model and at least 200Ah capacity battery for 3KVA/24V model.
3. Insert the ring terminal of battery cable flatly into battery connector of inverter and make sure the bolts are tightened with torque of 2-3 Nm. Make sure polarity at both the battery and the inverter/charge is correctly connected and ring terminals are tightly screwed to the battery terminals.
   

Shock Hazard
Installation must be performed with care due to high battery voltage in series.

Do not place anything between the flat part of the inverter terminal and the ring terminal. Otherwise, overheating may occur.

Do not apply anti-oxidant substance on the terminals before terminals are connected tightly.

Before making the final DC connection or closing DC breaker/disconnector, be sure positive (+) must be connected to positive (+) and negative (-) must be connected to negative (-).

Lithium Battery Connection

If choosing lithium battery for Growatt SPF series products, you are allowed to use the lithium battery only which have configured. There're two connectors on the lithium battery, RJ45 port of BMS and power cable.
Please follow below steps to implement lithium battery connection:

1. Assemble battery ring terminal based on recommended battery cable and terminal size (same as Lead acid, see section Lead-acid Battery connection for details).
2. Insert the ring terminal of battery cable flatly into battery connector of inverter and make sure the bolts are tightened with torque of 2-3Nm. Make sure polarity at both the battery and the inverter/charge is correctly connected and ring terminals are tightly screwed to the battery terminals.
3. Connect the end of RJ45 of battery to BMS communication port(RS485 or CAN) of inverter.
   
4. The other end of RJ45 insert to battery communication port(RS485 or CAN).
   

Note: If choosing lithium battery, make sure to connect the BMS communication cable between the battery and the inverter. You need to choose battery type as "lithium battery".

Lithium battery communication and setting

In order to communicate with battery BMS, you should set the battery type to "LI" in Program 5. Then the LCD will switch to Program 36, which is to set the protocol type. There are several protocals in the inverter. Please get instruction from Growatt to choose which protocol to match the BMS.

1. Connect the end of RJ45 of battery to BMS communication port of inverter
   Make sure the lithium battery BMS port connects to the inverter is Pin to Pin, the inverter BMS port and RS485 port pin assignment shown as below:
   

   Pin number	BMS port	RS485 port (for expansion)
   1	RS485B	RS485B
   2	RS485A	RS485A
   3	--	--
   4	CANH	--
   5	CANL	--
   6	--	--
   7	--	--
   8	--	--

2. LCD setting
   To connect battery BMS, need to set the battery type as "LI" in Program 05.
   After set "LI" in Program 05, it will switch to Program 36 to choose battery type. There will be some options under Program 36.

   05	Battery type	AGM (default)	Flooded
   		Lithium (only suitable when communicated with BMS)
   		User-Defined If "User-Defined" is selected, battery charge voltage and low DC cut-off voltage can be set up in program 19, 20 and 21.
   		User-Defined 2 (suitable when lithium battery without BMS communication) If "User-Defined 2" is selected, battery charge voltage and low DC cut-off voltage can be set up in program 19, 20 and 21. It is recommended to set to the same voltage in program 19 and 20 (full charging voltage point of lithium battery). The inverter will stop charging when the battery voltage reaches this setting.
   36	RS485 Communication protocol	Protocol 1
   		Protocol 2
   		Protocol 50
   	CAN Communication protocol	Protocol 51
   		Protocol 52
   		Protocol 99

   Note: When the battery type set to Li, the setting option 12, 13, 21 will change to display percent.
   Note: When the battery type set as "LI", the Maximum charge current can't be modified by the user. When the communication fail, the inverter will cut off output.

   12	Setting SOC point back to utility source when selecting "SBU priority" or "Solar first" in program 01	Default 50%, 10%~50% Settable
   13	Setting SOC point back to battery mode when selecting "SBU priority" or "Solar first" in program 01	Default 95%, 30%~100% Settable
   21	Low DC Cut-off SOC. If self-defined is selected in program 5, this program can be set up	Default 20%, 5%~30% Settable

   Note: Any questions about communicating with BMS, please consult with Growatt.
   Note: If need to use communicate with BMS in a parallel system, you should make sure to connect the BMS communication cable between the battery and one inverter of the parallel system. It's recommended to connect to the master inverter of the parallel system.

AC Input/Output Connection

Before connecting to AC input power source, please install a separate AC breaker between inverter and AC input power source. This will ensure the inverter can be securely disconnected during maintenance and fully protected from over current of AC input. The recommended spec of AC breaker is 40A for 3KVA.

There are two terminal blocks with "IN" and "OUT" markings. Please do NOT mis-connect input and output connectors.

All wiring must be performed by a qualified personnel.

It's very important for system safety and efficient operation to use appropriate cable for AC input connection. To reduce risk of injury, please use the proper recommended cable size as below.

Suggested cable requirement for AC wires

Please follow below steps to implement AC input/output connection:

1. Before making AC input/output connection, be sure to open DC protector or disconnector first.
2. Remove insulation sleeve 10mm for six conductors. And shorten phase L and neutral conductor N 3 mm.
3. Insert AC input wires according to polarities indicated on terminal block and tighten the terminal screws. Be sure to connect PE protective conductor first.
   → Ground (yellow-green)
   L → LINE (brown or black)
   N → Neutral (blue)
   
   
   Be sure that AC power source is disconnected before attempting to hardwire it to the unit.
4. Then, insert AC output wires according to polarities indicated on terminal block and tighten terminal screws. Be sure to connect PE protective conductor first.
   → Ground (yellow-green)
   L → LINE (brown or black)
   N → Neutral (blue)
   
5. Make sure the wires are securely connected.
   
   Important
   Be sure to connect AC wires with correct polarity. If L and N wires are connected reversely, it may cause utility short-circuited when these inverters are worked in parallel operation.

Appliances such as air conditioner are required at least 2~3 minutes to restart because it's required to have enough time to balance refrigerant gas inside of circuits. If a power shortage occurs and recovers in a short time, it will cause damage to your connected appliances. To prevent this kind of damage, please check with manufacturer of air conditioner that if it's equipped with time-delay function before installation. Otherwise, this off grid solar inverter will trig overload fault and cut off output to protect your appliance but sometimes it still causes internal damage to the air conditioner.

PV Connection

Before connecting to PV modules, please install separately a DC circuit breaker between inverter and PV modules.

All wiring must be performed by a qualified personnel.

It'' very important for system safety and efficient operation to use appropriate cable for PV module connection. To reduce risk of injury, please use the proper recommended cable size as below.

PV Module Selection:
When selecting proper PV modules, please be sure to consider below parameters:

1. Open circuit Voltage (Voc) of PV modules not exceeds max. PV array open circuit voltage of inverter.
2. Open circuit Voltage (Voc) of PV modules should be higher than min. battery voltage.

   Solar Charging Mode
   INVERTER MODEL	SPF 3000TL LVM-24P	SPF 3000TL LVM-48P
   Max. PV Array Open Circuit Voltage	145Vdc	145Vdc
   PV Array MPPT Voltage Range	30~115Vdc	60~115Vdc
   Min. battery voltage for PV charge	17Vdc	34Vdc

Please follow below steps to implement PV module connection:

1. Remove insulation sleeve 10 mm for positive and negative conductors.
   
2. Check correct polarity of connection cable from PV modules and PV input connectors. Then, connect positive pole (+) of connection cable to positive pole (+) of PV input connector. Connect negative pole (-) of connection cable to negative pole (-) of PV input connector.
   
3. Make sure the wires are securely connected.

Final Assembly

After connecting all wiring, please put bottom cover back by screwing two screws as shown below.

Communication Connection

Please use supplied communication cable to connect to inverter and PC. Insert bundled CD into a computer and follow on-screen instruction to install the monitoring software. For the detailed software operation, please check user manual of software inside of CD.

Dry Contact Signal

There is one dry contact(3A/250VAC) available on the rear panel. It could be used to deliver signal to external device when battery voltage reaches warning level.

Unit Status	Condition			Dry contact port:
				NC & C	NO & C
Power Off	Unit is off and no output is powered			Close	Open
Power On	Output is powered from Utility			Close	Open
	Output is powered from Battery or Solar	Program 01 set as Utility first	Battery voltage (SOC)< Low DC warning voltage(SOC)	Open	Close
			Battery voltage(SOC) > Setting value in Program 13 or battery charging reaches floating stage	Close	Open
		Program 01 is set as SBU or Solar first	Battery voltage (SOC)< Setting value in Program 12	Open	Close
			Battery voltage (SOC)> Setting value in Program 13 or battery charging reaches floating stage	Close	Open

Operation

Power ON/OFF

Once the unit has been properly installed and the batteries are connected well, simply press On/Off switch (located on the button of the case) to turn on the unit.

Operation and Display Panel

The operation and display panel, shown in below chart, is on the front panel of the inverter. It includes three indicators, four function keys and a LCD display, indicating the operating status and input/output power information.

1. LCD display
2. Status indicator
3. Charging indicator
4. Fault indicator
5. Function buttons

LED Indicator

LED Indicator			Messages
	Green	Solid On	Output is powered by utility in Line mode.
		Flashing	Output is powered by battery or PV in battery mode.
	Green	Solid On	Battery is fully charged.
		Flashing	Battery is charging.
	Red	Solid On	Fault occurs in the inverter.
		Flashing	Warning condition occurs in the inverter.

Function Buttons

LCD Display Icons

Icon	Function Description
Input Source Information
	Indicates the AC input.
	Indicates the PV input
	Indicate input voltage, input frequency, PV voltage, battery voltage and charger current.
Configuration Program and Fault Information
	Indicates the setting programs.
	Indicates the warning and fault codes. Flashing with warning code. Fault: lighting with fault code
Output Information
	Indicate output voltage, output frequency, load percent, load in VA, load in Watt and discharging current.
Battery Information
	Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery mode and charging status in line mode.
	These two signs indicate the charge priority. "SOLAR" indicates solar first. "UTILITY" indicate utility first. "SOLAR" blinking indicates solar only; "SOLAR" and "UTILITY" both on indicates combined charging.
In AC mode, it will present battery charging status. Status Battery voltage LCD display Constant current mode/Constant voltage mode <2V/cell 4 bars will flash in turns. 2~2.083V/cell Bottom bar will be on and the other three bars will flash in turns. 2.083~2.167V/cell Bottom two bars will be on and the other two bars will flash in turns. >2.167V/cell Bottom three bars will be on and the top bar will flash. Floating mode Batteries are fully charged 4 bars will be on.
In battery mode, it will present battery capacity. Load Percentage Battery Voltage LCD Display Load >50% < 1.717V/cell 1.717V/cell ~ 1.8V/cell 1.8 ~ 1.883V/cell > 1.883 V/cell 50%> Load > 20% < 1.817V/cell 1.817V/cell ~ 1.9V/cell 1.9 ~ 1.983V/cell > 1.983 Load < 20% < 1.867V/cell 1.867V/cell ~ 1.95V/cell 1.95 ~ 2.033V/cell > 2.033
Load Information
	Indicates overload.
	Indicates the load level by 0-24%, 25-49%, 50-74% and 75-100%.
	0%~24%	25%~49%	50%~74%	75%~100%
Mode Operation Information
	Indicates unit connects to the mains.
	Indicates unit connects to the PV panel.
	Indicates load is supplied by utility power.
	Indicates the utility charger circuit is working.
	Indicates the DC/AC inverter circuit is working.
	These three signs indicate the output priority. "SOL.FIRST" indicates solar first. "BAT.FIRST" indicates battery first. "UTI.FIRST" indicates utility first.
Mute Operation
	Indicates unit alarm is Enabled.

LCD Setting

After pressing and holding ENTER button for 3 seconds, it will enter setting mode. Press "UP" or "DOWN" button to select setting programs. Then press "ENTER" button to confirm the selection or ESC button to exit.

Setting Programs:

Program	Description	Setting Option
01	Output source priority: To configure load power source priority	Solar first
		Solar energy provides power to the loads as first priority. If solar energy is not sufficient 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 either low-level warning voltage or the setting point in program 12.
		Utility first (default)
		Utility will provide power to the loads as first priority. Solar and battery energy will provide power to the loads only when utility power is not available.
		SBU priority
		Solar energy provides power to the loads as first priority. If solar energy is not sufficient 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 either low-level warning voltage or the setting point in program 12.
02	Maximum charging current: To configure total charging current for solar and utility chargers. (Max. charging current = utility charging current + solar charging current)	24V model: default 60A, 10A~140A settable 48V model: default 60A, 10A~120A settable (If Li is selected in Program 5, this program can't be set up)
03	AC input voltage range	Appliance (default)	If selected, acceptable AC input voltage range will be within 65~140VAC
			If selected, acceptable AC input voltage range will be within 95~140VAC
		(Only diesel generators allowed)	If selected, acceptable AC input voltage range will be within 65~140VAC. In this mode, the Max. charging current is 30A. Note: When connecting generator, the generator should be no less than 10KVA(no less than 20KVA for three phase parallel system), and the inverters should be no more than 2 units in one phase.
04	Power saving mode enable/disable	(default)		If disabled, no matter connected load is low or high, the on/off status of inverter output will not be effected.
		Saving mode enable		If enabled, the output of inverter will be off when connected load is pretty low or not detected.
05	Battery type	AGM (default)		User-Defined If "User-Defined" is selected, battery charge voltage and low DC cut-off voltage can be set up in program 19, 20 and 21.
		Flooded
		Lithium (Only suitable when communicated with BMS)
		User-Defined 2 (suitable when lithium battery without BMS communication) If "User-Defined 2" is selected, battery charge voltage and low DC cutoff voltage can be set up in program 19, 20 and 21. It is recommended to set to the same voltage in program 19 and 20(full charging voltage point of lithium battery). The inverter will stop charging when the battery voltage reaches this setting.
06	Auto restart when overload occurs	Restart disable (default)		Restart enable
07	Auto restart when over temperature occurs	Restart disable (default)		Restart enable
08	Output voltage	120V (default)		110V
		100V
09	Output frequency	50Hz		60Hz (default)
10	Number of series batteries connected	(e.g. Showing batteries are connected in 4 series)
11	Maximum utility charging current Note: If setting value in Program 02 is smaller than that in Program 11, the inverter will apply charging current from Program 02 for utility charger	24V model: default 30A, 0A~60A Settable 48V model: default 30A, 0A~40A Settable (If Li is selected in Program 5, this program can't be set up)
12	Setting voltage point back to utility source when selecting "SBU priority" or "Solar first" in program 01	24V model: default 23.0V, 22.0V~25.6V Settable 48V model: default 46.0V, 44.0V~51.2V Settable
13	Setting voltage point back to battery mode when selecting "SBU priority" or "Solar first" in program 01	24V model: default 27.0V, 24.0V~29.0V Settable 48V model: default 54.0V, 48.0V~58.0V Settable
14	Charger source priority: To configure charger source priority	If this off grid solar inverter is working in Line, Standby or Fault mode, charger source can be programmed as below:
		Solar first	Solar energy will charge battery as first priority. Utility will charge battery only when solar energy is not available.
		Utility first	Utility will charge battery as first priority. Solar energy will charge battery only when utility power is not available.
		Solar and Utility	Solar energy and utility will both charge battery.
		Only Solar	Solar energy will be the only charger source no matter utility is available or not.
		If this off grid solar inverter is working in Battery mode or Power saving mode, only solar energy can charge battery. Solar energy will charge battery if it's available and sufficient.
15	Alarm control	Alarm on (default)	Alarm off
16	Backlight control	Backlight on (default)	Backlight off
17	Beeps while primary source is interrupted	Alarm on (default)	Alarm off
18	Overload bypass: When enabled, the unit will transfer to line mode if overload occurs in battery mode.	Bypass disable (default)	Bypass enable
19	C.V. charging voltage. If self-defined is selected In program 5, this program can be set up	24V model: default 28.2V, 24.0V~29.2V Settable 48V model: default 56.4V, 48.0V~58.4V Settable
20	Floating charging voltage. If self-defined is selected in program 5, this program can be set up	24V model: default 27.0V, 24.0V~29.2V Settable 48V model: default 54.0V, 48.0V~58.4V Settable
21	Low DC cut-off voltage. If battery power is only power source available, inverter will shut down. If PV energy and battery power are available, inverter will charge battery without AC output. If PV energy, battery power and utility are all available, inverter will transfer to line mode and provide output power to loads, and charge the battery at the same time.	24V model: default 21.0V, 20.0V~24.0V Settable 48V model: default 42.0V, 40.0V~48.0V Settable
		If self-defined is selected in program 5, this program can be set up. Low DC cut-off voltage will be fixed to setting value no matter what percentage of load is connected.
22	Solar power balance. When enabled, solar input power will be automatically adjusted according to connected load power.	Solar power balance enable (Default):	If selected, solar input power will be automatically adjusted according to the following formula: Max. input solar power = Max. battery charging power + Connected load power.
		Solar power balance disable	If selected, the solar input power will be the same to max. battery charging power no matter how much loads are connected. The max. battery charging power will be based on the setting current in program 2. (Max. solar power = Max. battery charging power)
23	AC output mode *This setting is only available when the inverter is in standby mode (Switch off). Power saving function will be automatically disabled when in parallel operation.	Single mode	When not in parallel operation
		Single phase	When the units are used in parallel with single phase
		Three phase: 3P1, 3P2, 3P3 It requires at least 3 inverters to support three-phase equipment, 1 inverter in each phase. Please select "3P1" for the inverters connected to L1 phase, "3P2" for the inverters connected to L2 phase and "3P3" for the inverters connected to L3 phase. Do NOT connect share current cable between units on different phases.
		Split phase: 2P0, 2P1, 2P2 Select "2P0" for the inverters connected to L1 phase; If connect split phase 120V/208V, select "2P1" for inverters connected to L2 phase; If connect split phase 120V/240V, select "2P2" for inverters connected to L2 phase Do NOT connect share current cable between units on different phases.
28	Address setting	24V model: default 1, 1~255 Settable 48V model: default 1, 1~255 Settable
43	Battery equalization	Battery equalization enable	Battery equalization disable(default)
		If "Flooded" or "User-Defined" is selected in program 05, this program can be set up.
44	Battery equalization Voltage	24V model: default 29.2V, 24.0V~29.2V Settable 48V model: default 58.4V, 48.0V~58.4V Settable
45	Battery equalized time		Default 60min, 5min~900min Settable
46	Battery equalized timeout		Default 120min, 5min~900min Settable
47	Equalization interval		Default 30days, 1 days~90 days Settable
48	Equalization activated immediately	Equalization activated immediately on	Equalization activated immediately off (default)
		If equalization function is enabled in program 43, this program can be setup. If "On" is selected in this program, it's to activate battery equalization immediately and LCD main page will shows "". If "Off" is selected, it will cancel equalization function until next activated equalization time arrives based on program 47setting. At this time, "" will not be shown in LCD main page.

Display Setting

The LCD display information will be switched in turns by pressing "UP" or "DOWN" key. The selectable information is switched as below order: input voltage, input frequency, PV voltage, MPPT charging current, MPPT charging power, battery voltage, output voltage, output frequency, load percentage, load in VA, load in Watt, DC discharging current, main CPU Version and second CPU Version.

Setting Information	LCD display
Input voltage/Output voltage (Default Display Screen)	Input Voltage=120V, output voltage=120V
Input frequency	Input frequency=50Hz
PV voltage	PV voltage=60V
Charging current	Current ≧10A Current < 10A
MPPT Charging power	MPPT charging power=500W
Battery voltage/DC discharging current	Battery voltage=51.0V, discharging current=0A
Output frequency	Output frequency=50Hz
Load percentage	Load percent=70%
Load in VA	When connected load is lower than 1kVA, load in VA will present xxx VA like below chart. When load is larger than 1kVA (≧1kVA), load in VA will present x.x kVA like below chart.
Load in Watt	When load is lower than 1kW, load in W will present xxx W like below chart. When load is larger than 1kW (≧1kW), load in W will present x.x kW like below chart.
Main CPU version checking	Main CPU version 502-00-719
Secondary CPU version checking	Secondary CPU version 002-00-719
Battery SOC	Battery SOC=80%

Operating Mode Description

Operation mode	Description	LCD display
Standby mode/Power saving mode Note: *Standby mode: The inverter is not turned on yet but at this time, the inverter can charge battery without AC output. *Power saving mode: If enabled, the output of inverter will be off when connected load is pretty low or not detected.	No output is supplied by the unit but it still can charge batteries.	Charging by utility and PV energy.
		Charging by utility.
		Charging by PV energy.
		No charging.
Fault mode Note: *Fault mode: Errors are caused by inside circuit error or external reasons such as over temperature, output short circuited and so on.	PV energy and utility can charge batteries.	Charging by utility and PV energy.
		Charging by utility.
		Charging by PV energy.
		No charging.
Line Mode	The unit will provide output power from the mains. It will also charge the battery at line mode.	Charging by PV energy
		Charging by utility
Battery Mode	The unit will provide output power from battery and PV power.	Power from battery and PV energy.
		Power from battery only.

Parallel Installation Guide

Introduction

This inverter can be used in parallel with three different operation modes.

1. Parallel operation in single phase with up to 6 units.
2. Maximum 6 units work together to support three-phase equipment. Four units support one phase maximum.
3. Maximum 6 units work together to support split-phase equipment. Five units support one phase maximum.

Note: If the package includes share current cable and parallel cable, the inverter is default supported parallel operation. You may skip section 3. If not, please purchase parallel kit and install this unit by following instruction from professional technical personnel in local dealer.

Package Contents

In parallel kit, you will find the following items in the package:

Parallel Board Installation

1. Remove wire cover by unscrewing all screws.
   
2. Remove communication board by unscrewing two screws as below chart.
   
3. Remove Rs485 communication board by unscrewing two screws as below chart. (BMS model)
   
4. Remove two screws as below chart and remove 2-pin and 14-pin cables. Take out the board under the communication board.
   
5. Remove two screws as below chart to take out cover of parallel communication.
   
6. Install new parallel board with 2 screws tightly.
   
7. Re-connect 2-pin and 14-pin to original position.
   
8. Put communication board back to the unit.
   
9. Put wire cover back to the unit. Now the inverter is providing parallel operation function.

Mounting the Unit

When installing multiple units, please follow below chart.

Note: For proper air circulation to dissipate heat, allow a clearance of approx. 20cm to the side and approx. 50 cm above and below the unit. Be sure to install each unit in the same level.

Wiring Connection

The cable size of each inverter is shown as below:
Recommended battery cable and terminal size for each inverter:

Ring terminal:

Be sure the length of all battery cables is the same. Otherwise, there will be voltage difference between inverter and battery to cause parallel inverters not working.

Recommended AC input and output cable size for each inverter:

You need to connect the cables of each inverter together. Take the battery cables for example: You need to use a connector or bus-bar as a joint to connect the battery cables together, and then connect to the battery terminal. The cable size used from joint to battery should be X times cable size in the tables above. "X" indicates the number of inverters connected in parallel.
Regarding AC input and output, please also follow the same principle.

Please install the breaker at the battery and AC input side. This will ensure the inverter can be securely disconnected during maintenance and fully protected from over current of battery or AC input.

Recommended breaker specification of battery for each inverter:

*If you want to use only one breaker at the battery side for the whole system, the rating of the breaker should be X times current of 1 unit. "X" indicates the number of inverters connected in parallel.

Recommended breaker specification of AC input with single phase:

Note:

1. Also, you can use 50A breaker for only 1 unit, and each inverter has a breaker at its AC input.
2. Regarding three phase system, you can use 4 poles breaker, the rating is up to the current of the phase which has the maximum units. Or you can follow the suggestion of note 1.

Recommended battery capacity

Be sure that all inverters will share the same battery bank. Otherwise, the inverters will transfer to fault mode.

Parallel Operation in Single phase

Two inverters in parallel:
Power Connection

Communication Connection

Three inverters in parallel:
Power Connection

Communication Connection

Four inverters in parallel:
Power Connection

Communication Connection

Five inverters in parallel:
Power Connection

Communication Connection

Six inverters in parallel:
Power Connection

Communication Connection

Parallel Operation in Three Phase

One inverter in each phase:
Power Connection

Communication Connection

Two inverters in one phase and only one inverter for the remaining phases:
Power Connection

Communication Connection

Two inverters in two phases and only one inverter for the remaining phase:
Power Connection

Communication Connection

Three inverters in one phase and only one inverter for the remaining two phases:
Power Connection

Communication Connection

Two inverters in each phase:
Power Connection

Communication Connection

Three inverters in one phase, two inverters in second phase and one inverter for the third phase:
Power Connection

Communication Connection

Four inverters in one phase and one inverter for the other two phases:
Power Connection

Communication Connection

Do not connect the current sharing cable between the inverters which are in different phases.
Otherwise, it may damage the inverters.

Parallel Operation in Split Phase

One inverter in each phase:
Power Connection

Communication Connection

Two inverters in each phase:
Power Connection

Communication Connection

Three inverters in each phase:
Power Connection

Communication Connection

Do not connect the current sharing cable between the inverters which are in different phases.
Otherwise, it may damage the inverters.

PV Connection

Please refer to user manual of single unit for PV Connection.

Each inverter should connect to PV modules separate

LCD Setting and Display

Setting Program: Please refer to Program 23

Commissioning

Parallel in single phase

1. Check the following requirements before commissioning:
   • Correct wire connection
   • Ensure all breakers in Line wires of load side are open and each Neutral wires of each unit are connected together.
2. Turn on each unit and set "PAL" in LCD setting program 23 of each unit. And then shut down all units.
   Note: It's necessary to turn off switch when setting LCD program. Otherwise, the setting can not be programmed.
3. Turn on each unit.
   
   Note: Master and slave units are randomly defined.
4. Switch on all AC breakers of Line wires in AC input. It's better to have all inverters connect to utility at the same time. If not, it will display warning 15.
   
5. If there is no more fault alarm, the parallel system is completely installed.
6. Please switch on all breakers of Line wires in load side. This system will start to provide power to the load.

Parallel in three phase

1. Check the following requirements before commissioning:
   • Correct wire connection
   • Ensure all breakers in Line wires of load side are open and each Neutral wires of each unit are connected together.
2. Turn on all units and configure LCD program 23 as 3P1, 3P2 and 3P3 sequentially. Then shut down all units.
   Note: It's necessary to turn off switch when setting LCD program. Otherwise, the setting can not be programmed.
3. Turn on all units sequentially. Please turn on HOST inverter first, then turn on the rest one by one.
   
4. Switch on all AC breakers of Line wires in AC input. If AC connection is detected and three phases are matched with unit setting, they will work normally. Otherwise, they will display warning 15/16 and will not work in the line mode.
   
5. If there is no more fault alarm, the system to support 3-phase equipment is completely installed.
6. Please switch on all breakers of Line wires in load side. This system will start to provide power to the load.

Note:

1. If there's only one inverter in L1-phase, the LCD will show as "HS". If there is more than one inverter in L1-phase, the LCD of the HOST inverter will show as "HS", the rest of L1-phase inverters will show as "P1".
2. To avoid overload occurring, before turning on breakers in load side, it's better to have whole system in operation first.
3. Transfer time for this operation exists. Power interruption may happen to critical devices, which cannot bear transfer time.

Parallel in split phase

1. Check the following requirements before commissioning:
   • Correct wire connection
   • Ensure all breakers in Line wires of load side are open and each Neutral wires of each unit are connected together.
2. Turn on all units and configure LCD program 23 as 2P0 on phase1 units, then set as 2P2 (or 2P1) on phase2 units.
   2P0 + 2P1: split phase 120V/208V
   2P0 + 2P2: split phase 120V/240V
   Note: It's necessary to turn off switch when setting LCD program. Otherwise, the setting can not be programmed.
3. Turn on all units sequentially. Please turn on HOST inverter first, then turn on the rest one by one.
   
4. Switch on all AC breakers of Line wires in AC input. If AC connection is detected and split phases are matched with unit setting, they will work normally. Otherwise, they will display warning 15/16 and will not work in the line mode.
   
5. If there is no more fault alarm, the system to support split-phase equipment is completely installed.
6. Please switch on all breakers of Line wires in load side. This system will start to provide power to the load.

Note:

1. If there's only one inverter in L1-phase, the LCD will show as "HS". If there is more than one inverter in L1-phase, the LCD of the HOST inverter will show as "HS", the rest of L1-phase inverters will show as "P1".
2. To avoid overload occurring, before turning on breakers in load side, it's better to have whole system in operation first.
3. Transfer time for this operation exists. Power interruption may happen to critical devices, which cannot bear transfer time.

Fault Reference Code

Fault Code	Fault Event	Icon on
01	Fan is locked
02	Over temperature
03	Battery voltage is too high
04	Battery voltage is too low
05	Output short circuited is detected by internal converter components
06	Output voltage is too high.
07	Overload time out
08	Bus voltage is too high
09	Bus soft start failed
51	Over current or surge
52	Bus voltage is too low
53	Inverter soft start failed
55	Over DC voltage in AC output
56	Battery connection is open
57	Current sensor failed
58	Output voltage is too low
60	Negative power fault
80	CAN fault
81	Host loss

Warning Indicator

Warning Code	Warning Event	Audible Alarm	Icon flashing
01	Fan is locked when inverter is on.	Beep three times every second
02	Over temperature	Beep once every second
03	Battery is over-charged	Beep once every second
04	Low battery	Beep once every second
07	Overload	Beep once every 0.5 second
10	Output power derating	Beep twice every 3 seconds
12	Solar charger stops due to low battery	Beep once every second
13	Solar charger stops due to high PV voltage	Beep once every second
14	Solar charger stops due to overload	Beep once every second
15	Parallel input utility grid different	Beep once every second
16	Parallel input phase error	Beep once every second
17	Parallel output phase loss	Beep once every second
20	BMS communication error	Beep once every second
33	BMS communication loss	Beep once every second
34	Cell over voltage	Beep once every second
35	Cell under voltage	Beep once every second
36	Total over voltage	Beep once every second
37	Total under voltage	Beep once every second
38	Discharge over current	Beep once every second
39	Charge over current	Beep once every second
40	Discharge over temperature	Beep once every second
41	Charge over temperature	Beep once every second
42	Mosfet over temperature	Beep once every second
43	Battery over temperature	Beep once every second
44	Battery under temperature	Beep once every second
45	System shut down	Beep once every second

Battery Equalization

Equalization function is added into charge controller. It reverses the buildup of negative chemical effects like stratification, a condition where acid concentration is greater at the bottom of the battery than at the top. Equalizationalso helps to remove sulfate crystals that might have built up on the plates. If left unchecked, this condition, called sulfation, will reduce the overall capacity of the battery. Therefore, it's recommended to equalize battery periodically.

How to Apply Equalization Function
You must enable battery equalization function in monitoring LCD setting program 43 first. Then, you may apply this function in device by either one of following methods:

1. Setting equalization interval in program 47.
2. Active equalization immediately in program 48.

When to Equalize
In float stage, when the setting equalization interval (battery equalization cycle) is arrived, or equalization is active immediately, the controller will start to enter Equalize stage.

Equalize charging time and timeout
In Equalize stage, the controller will supply power to charge battery as much as possible until battery voltage raises to battery equalization voltage. Then, constant-voltage regulation is applied to maintain battery voltage at the battery equalization voltage. The battery will remain in the Equalize stage until setting battery equalized time is arrived.

However, in Equalize stage, when battery equalized time is expired and battery voltage doesn't rise to battery equalization voltage point, the charge controller will extend the battery equalized time until battery voltage achieves battery equalization voltage. If battery voltage is still lower than battery equalization voltage when battery equalized timeout setting is over, the charge controller will stop equalization and return to float stage.

Specifications

Table 1 General Specifications

Table 2 Line Mode Specifications

INVERTER MODEL	SPF 3000TL LVM
Input Voltage Waveform	Sinusoidal (utility or generator)
Nominal Input Voltage	120Vac
Low Loss Voltage	95Vac±5V (UPS); 65Vac±5V (Appliances)
Low Loss Return Voltage	100Vac±5V (UPS); 70Vac±5V (Appliances)
High Loss Voltage	140Vac±5V
High Loss Return Voltage	135Vac±5V
Max AC Input Voltage	150Vac
Nominal Input Frequency	50Hz/60Hz (Auto detection)
Low Loss Frequency	40±1Hz
Low Loss Return Frequency	42±1Hz
High Loss Frequency	65±1Hz
High Loss Return Frequency	63±1Hz
Output Short Circuit Protection	Circuit Breaker
Efficiency (Line Mode)	>95% ( Rated R load, battery full charged )
Transfer Time	10ms typical, 20ms Max@ Single <30ms @ Parallel
Output power derating: When AC input voltage drops to 95V, the output power will be derated.

Table 3 Inverter Mode Specifications

Table 4 Charge Mode Specifications

Utility Charging Mode
INVERTER MODEL		SPF 3000TL LVM-24P	SPF 3000TL LVM-48P
Charging Current (UPS) @ Nominal Input Voltage		Default: 30A, max 60A	Default: 30A, max 40A
Bulk Charging Voltage	Flooded Battery	29.2Vdc	58.4Vdc
	AGM/Gel Battery	28.2Vdc	56.4Vdc
Floating Charging Voltage		27Vdc	54Vdc
Overcharge Protection		30Vdc	60Vdc
Charging Algorithm		3	-Step
Charging Curve
Solar Charging Mode
Efficiency		98.0% max.
Max. PV Array Open Circuit Voltage		145Vdc
PV Array MPPT Voltage Range		30~115Vdc	60~115Vdc
Min battery voltage for PV charge		17Vdc	34Vdc
Max PV Charging current		80A
Battery Voltage Accuracy		+/-0.3%
PV Voltage Accuracy		+/-2V
Charging Algorithm		3-Step
Joint Utility and Solar Charging
Max Charging Current		140Amp	120Amp
Default Charging Current		60Amp

Trouble Shooting

Note: To restart the inverter, all power sources need to be disconnected. After the LCD screen light is off, only use the battery to boot.

Safety Instructions

This chapter contains important safety and operating instructions. Read and keep this manual for future reference.

1. 
   Only qualified personnel can install this device with battery.
2. Before using the unit, read all instructions and caution marks on the unit, understand the batteries and all appropriate sections of this manual.
3. NEVER cause AC output and DC input short circuited. Do NOT connect to the mains when DC input short circuits.
4. NEVER charge a frozen battery.
5. Do not disassemble the unit. Take it to a qualified service center when service or repair is required. Incorrect re-assembly may result in a risk of electric shock or fire.
6. To reduce risk of electric shock, disconnect all wiring before attempting any maintenance or cleaning. Turning off the unit will not reduce this risk.
7. Be very cautious when working with metal tools on or around batteries. A potential risk, such as dropping a tool to spark or short circuit batteries or other electrical parts, could cause an explosion.
8. For optimum operation of this off grid solar inverter, please follow required spec to select appropriate cable size. It's very important to correctly operate this off grid solar inverter.
9. Please strictly follow installation procedure when you want to disconnect AC or DC terminals. Please refer to INSTALLATION section of this manual for the details.
10. GROUNDING INSTRUCTIONS –This off grid solar inverter should be connected to a permanent grounded wiring system. Be sure to comply with local requirements and regulation to install this inverter.
11. Fuses with provided standard are provided as over-current protection for the battery supply.
12. 
    Only qualified service persons are able to service this device. If errors still persist after following troubleshooting table, please send this off grid solar inverter back to local dealer or service center for maintenance.