LESSO LGA-HJ 350-5000W (01) PDF DOCUMENT

Please read the literature accompanying the following symbols to use the product efficiently and ensure personal and property safety:

DANGER: Indicates a high-level hazard that, if not avoided, will result in serious injury or death.

WARNING: Indicates a medium-level hazard that, if not avoided, could result in death or serious injury.

CAUTION: Indicates a low-level hazard that, if not avoided, could result in minor or moderate injury.

NOTICE: Indicates an important reminder during the operation which, if ignored, may result in an equipment error alarm.

Tip: Indicates recommendation for reference.

i: Read through the user manual before any operations.

Requirements for professional and technical personnel:

• Professionally trained.

• Familiar with related safety specifications for the electrical system.

• Read this manual carefully and master related safety precautions.

Operations for professional and technical personnel:

• Install the inverter to a specified location.

• Conduct trial operations for the inverter.

• Operate and maintain the inverter.

DANGER

• Keep the inverter out of the reach of children.

• When installing the inverter, please evaluate whether there is a risk of electric arc in the operation area.

NOTICE

• After receiving the inverter, check if there is any damage during transportation. If you find any problem, please contact the transportation company or your local distributor.

• This inverter is an off-grid type. It is strictly prohibited to connect the inverter to the grid. Otherwise, the inverter will be damaged.

• This inverter is only allowed for stand-alone operation. It is prohibited to connect multiple units in parallel or series. Otherwise, the inverter will be damaged.

• The inverter needs to be connected to a battery. The battery’s minimum capacity (Ah) is recommended to be five times the current that equals the inverter’s rated output power divided by the battery’s voltage.

Mechanical Installation:

• Before installation, ensure the inverter has no electrical connection.

• Confirm enough heat dissipation space for the inverter before installation. Do not install the inverter in a harsh environment such as humid, greasy, flammable, explosive, or dust accumulation.

Electrical Connection:

• Do not install the inverter close to the flooded lead-acid battery because the terminals’ sparkle may ignite the hydrogen released by the battery.

• Check whether wiring is tight to avoid the danger of heat accumulation due to loose connections.

• The AC output terminal is only for the load connection. Do not connect it to another power source or utility.

• Do not connect battery chargers or other similar products to the input terminal of the inverter.

• The protective grounding is connected to the ground. The cross-section of the wire should not be less than 4mm².

• A fuse or breaker should be used between the battery and Inverter; the fuse or breaker’s rated current should be twice the inverter rated input current.

• The DC input voltage must strictly follow the parameter table. Too high or too low DC input voltage will affect the inverter’s normal operation and may even damage it.

• It is recommended that the connection length between the battery and the inverter be less than 3 meters. If greater than 3 meters, please reduce the current density of the connection wire.

• It is strictly forbidden to connect a transformer or a load with a surge power (VA) exceeding the overload power at the AC output port.

• The inverter’s AC output is of high voltage, do not touch the wiring connection to avoid electric shock.

• When the inverter is working, the shell will generate much heat, and the temperature is very high; please do not touch it.

• When the inverter is running, please do not open the cabinet.

Dangerous operations which would cause electric arc, fire or explosion:

• Touch the wire end that hasn’t been insulation treated and may be electriferous.

• Touch the wiring copper row, terminals, or internal inverter modules that may be electriferous.

• The connection of the power cable is loose.

• Screw or other spare parts inadvertently fall into the inverter.

• Improper operations by untrained non-professional or technical personnel.

Safety precautions for stopping the inverter:

• The internal conductive modules could be touched after the inverter stopped running for five minutes.

• The inverter is allowed to restart after removing the faults, which affects the safety performance.

• There are no serviceable parts inside. If any maintenance service is required, please contact service personnel.

• Do not touch or open the shell after the inverter is powered off within ten minutes.

Safety precautions for inverter maintenance:

• It is recommended to check the inverter with testing equipment to ensure no voltage and current.

• When conducting electrical connection and maintenance, post a temporary warning sign or put up barriers to prevent unrelated personnel from entering the electrical connection or maintenance area.

• An improper operation of the inverter may cause personal injury or equipment damage.

• It is recommended to wear an antistatic wrist strap or avoid unnecessary contact with the circuit board.

• Completely electrically isolated design for input and output.

• Full digital double closed-loop control.

• Excellent EMC characteristic, widely applied to higher quality power systems.

• Advanced SPWM technology and pure sine wave output.

• Input surge current suppression technology, applying to the lithium battery system.

• Outstanding load resistance to impact, applying to air conditioners, washing machines, refrigerators, etc.

• High power density and high-quality components to ensure reliability.

• Output power factor up to 1.

• Low loss of zero loads and standby. Low THD (Total Harmonic Distortion). High conversion efficiency.

• Extensive protections: input reverse polarity/under voltage/over voltage, output overload/short circuit/overheating.

• Air cooling is controlled by temperature and load.

• Rotatable LCD meter to simplify the system wiring (Note 1).

• Friendly LCD meter to simply monitor and parameter configure (Note 1).

• Remote control by the phone Apps and PC software.

• Configurable output voltage, output frequency and baud rate (Note 2).

• Enable power saving mode (PSE) conveniently (Note 2).

• Charging mobile phones, DC fans, and other electrical equipment by the USB port (Note 3).

• Support a variety of options by connecting with the RS485 com. port (Note 4).

• External switch contact design to allow remote control.

• EN/IEC62109, EN61000-6-1/3, RoHS, ETL, and FCC approved.

Notes:

(1) There is no LCD meter for the LGA-351-HJ series.

(2) Configure the parameters via the local LCD meter (not including the LGA-351-HJ series), remote LCD meter, phone Apps, or PC software.

(3) This function is unavailable for inverters with 48V input voltage.

(4) There is no communication isolation design for inverters with 12V/24V input voltage. This function (communication isolation design) is just for inverters with 48V input voltage.

Notes:

(1) The DC input terminal and the AC output port vary with different products. Please refer to the real product.

(2) USB output port is not available for inverters with 48V input voltage.

(3) The main purpose of the fast-acting fuse terminal is to protect the AC socket. The load connected to the product, equipped with a fast-acting fuse terminal, cannot exceed the marked 10A or 20A. Not all LGA-HJ products are equipped with the fast-acting fuse terminal; the actual products prevail.

The naming rule is structured as follows: LGA – 502 D L C 2 – HJ

• LGA: Product series

• 50: Rated output power (e.g., 350W, 500W, 1000W, etc.)

• 2: Battery voltage (A indicates 12V; B indicates 24V; C indicates 36V; D indicates 48V; E indicates 72V; F indicates 96V)

• D: Isolation type (L indicates isolated; N indicates Non-isolated)

• L: Battery (A indicates Lead-acid; L indicates Lithium; C indicates compatible)

• C: Output voltage (1 indicates 110V; 2 indicates 220V)

• 2: Series code

• HJ: Suffix

A GFCI socket needs to be tested after power-on to ensure proper operation.

1. Preparation

Connect a circuit breaker and an AC load (it is recommended to use a night light to observe the status conveniently) to the GFCI socket. Turn on the inverter after confirming the wiring.

2. Testing

• If the red LED is ON solid, it indicates that the GFCI socket is damaged; please replace a new one.

• If the LED is green ON after it flashes in red three times, connect the circuit breaker, and the night light will be turned on. Then, press the “TEST” button to observe the testing status:

– If the “TEST” button always pops up, and the night light keeps ON solid, it indicates that the GFCI wiring is an error; please correct it.

– If the “TEST” button goes down, while the “RESET” button pops up, and the LED and the night light are turned off, it indicates the GFCI socket is normal. Press the “RESET” button again to recover the load output.

The inverter’s DC input terminal should be connected directly to the battery terminals. The AC output port should be connected to your AC loads, such as a PC, washing machine, or light bulb.

NOTICE: It is recommended to directly connect the inverter DC input terminal to the battery terminal. Do not connect it to the charge source terminal. Otherwise, the charging voltage spikes of the charge source may cause over-voltage protection of the inverter.

The remote meter features an LCD, a power indicator (blue), a fault indicator (red), and several buttons for operation.

Note: A long buzzer beeps for parameter confirming and short beeps for other button operations.

Browsing the Real-time Interface:

Click the UP or DOWN button to browse the real-time interface, which displays Battery voltage, Load voltage, Load current, Load frequency, and Load power.

Parameters Setting Steps:

Step 1: In the real-time interface, press the UP/Setting button for 2s to enter the parameter setting interface.

Step 2: Click the UP or DOWN button to select the parameter to be configured.

Step 3: Press the UP/Setting button for 2s to enter the configuration interface of the specified parameter.

Step 4: Click the UP or DOWN button to configure the parameter value.

Step 5: Press the DOWN/Enter button for 2s to confirm the configuration.

Step 6: To exit the current interface, click the UP and DOWN buttons at the same time.

When the actual load power is lower than the PSI (power to enter power saving mode), the system switches to power saving mode. When the actual load power exceeds the PSO (power to exit power saving mode), the inverter resumes normal work.

Enable power saving mode (PSE):

Step 1: In the real-time interface, press and hold the UP/Setting button for 2s to enter the parameters setting interface.

Step 2: Click the UP or DOWN button to select the PSE parameter.

Step 3: Press and hold the UP/Setting button for 2s until the PSE parameter (OFF by default) flashes.

Step 4: Click the UP or DOWN button to set the PSE parameter to ON to enable or OFF to disable.

Step 5: Press and hold the DOWN/Enter button for 2s to confirm.

Set the power to exit the power saving mode (PSO):

Step 1: In the parameters setting interface, click the UP or DOWN button to select the PSO parameter.

Step 2: Press and hold the UP/Setting button for 2s until the PSO value flashes.

Step 3: Click the DOWN button to decrease the PSO value by 1. Click the UP button to increase the PSO value by 1. Press and hold the UP button to increase the PSO value by 10.

Step 4: Press and hold the DOWN/Enter button for 2s to confirm.

Set the power to enter the power saving mode (PSI):

Step 1: In the parameters setting interface, click the UP or DOWN button to select the PSI parameter.

Step 2: Press and hold the UP/Setting button until the PSI value flashes.

Step 3: Click the DOWN button to decrease the PSI value by 1. Click the UP button to increase the PSI value by 1. Press and hold the UP button to increase the PSI value by 10.

Step 4: Press and hold the DOWN/Enter button for 2s to confirm.

• Read all the installation instructions carefully in the manual before installation.

• Be very careful when installing the batteries. When installing the open-type lead-acid battery, please wear eye protection and rinse with clean water in time for battery acid contact.

• Keep the battery away from any metal objects, which may cause a short circuit of the battery.

• Loose power connectors and corroded wires may result in high heat, melt wire insulation, burn surrounding materials, or cause a fire. Ensure tight connections and secure cables with cable clamps.

• The DC input voltage must strictly follow the parameter table. DC input 12V: Surge voltage < 20V. DC input 24V: Surge voltage < 40V. DC input 48V: Surge voltage < 80V.

• Select the system cables according to 3.5A/mm² or less current density.

• Avoid direct sunlight and rain infiltration when installing it outdoor.

• After turning off the power switch, do not open or touch the internal component immediately. Performing related operations after 10 minutes are recommended.

• Do not install the inverter in a harsh environment such as humid, greasy, flammable, explosive, or dust accumulation.

• The AC output is of high voltage, do not touch the wiring connection to avoid electric shock.

• To prevent injury, do not touch the fan while it is working.

Recommended Battery Wire Size and Circuit Breaker

★ According to the recommended battery wire size, two battery wires connected in parallel are necessary for some models. Four battery wires connected in parallel are necessary for LGA-302ALC1-HJ and LGA-302ALC2-HJ.

NOTICE: The wire size and circuit breaker size are for reference only; please choose a suitable wire and circuit breaker according to the actual situation. If there is a long distance between the inverter and the battery, larger wires shall be used to reduce the voltage drop and improve system performance.

Mounting:

Step 1: Read the manual carefully.

Step 2: Determine the installation location. The inverter shall be installed in a place with sufficient airflow through its dissipation pad. A minimum clearance of 150mm from the upper and lower edges is recommended to ensure natural thermal convection. Do not install the product in an enclosed cabinet, as it will affect device cooling.

Wiring Sequence:

• Turn off the inverter switch before wiring.

• Do not connect the circuit breaker or fuse during wiring and ensure that the poles’ leads are connected correctly.

1. Ground connection: The specifications of the ground cable must be greater than or equal to that of the AC output cable.

2. Battery connection: A fast-acting fuse must be installed on the battery side, with a voltage 1.5 to 2 times the inverter’s rated voltage and a current 2 to 2.5 times the inverter’s rated current. The distance between the fuse and battery should not be more than 150mm.

3. AC loads connection: The AC loads shall be determined by the continuous output power of the inverter. The surge power of the AC load must be lower than the instantaneous surge power of the inverter. It is recommended to use multi-stranded wire with a diameter of not more than 6mm².

Step 1: Connect the breaker at the inverter input terminal or the fast-acting fuse at the battery terminal.

Step 2: Turn on the inverter switch, and the green indicator will be lighted on, which states a normal AC output.

Step 3: Turn on the AC loads one by one and check the inverter’s running status and the loads.

Step 4: If the FAULT indicator flashes red and the buzzer alarms after powering on, please immediately turn off the load and the inverter. Clear the faults according to the Troubleshooting chapter. After clearing the faults, operate the inverter again by following the above steps.

NOTICE: When supplying power for different loads, it is recommended to first turn on the load with a large impulse current. And then turn on the load with a smaller impulse current after the load output is stable.

Step 1: Remove the screws of the LCD unit with a screwdriver, and rotate it 180°.

Step 2: Secure the screws of the LCD unit to the inverter.

When modifying the battery’s input voltage parameters, the following rules must be followed:

A. Over voltage limiting voltage (16.2/32.2/64.4V) ≥ Over voltage disconnect voltage ≥ Over voltage reconnect voltage plus 1V.

B. Over voltage reconnect voltage ≥ Low voltage reconnect voltage.

C. Low voltage reconnect voltage ≥ Low voltage disconnect voltage plus 1V.

D. Low voltage disconnect voltage ≥ Low voltage limiting voltage (10.5/21/42V).

NOTICE: Although the inverter is supplied with input over-voltage protection, the surge voltage cannot be higher than 20V for the 12V system, not higher than 40V for the 24V system, and not higher than 80V for the 48V system. Otherwise, the inverter may be damaged.

When an overload protection happens, the AC output will be recovered automatically three times (after 5s, 10s, and 15s separately). After three attempts fail, you need to restart the inverter to recover the AC output. For some models, the AC output will shut down and cannot be recovered automatically.

The general overload status includes the output switching OFF, buzzer beeping, red indicator slowly flashing, and the LCD displaying ΔOOL. The time until shutdown depends on the model and overload level, as detailed in the tables below (S=Output power, Pe=Rated power).

For models LGA-351 to LGA-302BLC2-HJ★:

For models LGA-202ALC1-HJ, LGA-302ALC1-HJ:

For models LGA-302ALC2-HJ, LGA-402DLC1-HJ, LGA-402DLC2-HJ:

For model LGA-502DLC2-HJ:

Output short circuit protection:

The output is switched OFF immediately, the buzzer beeps, the red indicator fast flashes, and the LCD displays ΔOSC. The AC output will attempt to recover automatically three times (after 5s, 10s, and 15s). If recovery fails, you must restart the inverter to recover the AC output.

Inverter over temperature protection:

The inverter stops working when the temperature of the heat sink or internal modules is higher than a set value. The LCD displays ΔOTP. The inverter resumes work automatically after the temperature of the heat sink or internal modules is lower than a set value.

DANGER: A high voltage occurs inside the inverter. Do not try to repair or maintain the inverter by yourself, as it may cause an electric shock.

For good performance, the following inspections and maintenance tasks are recommended at least two times per year:

• Make sure no block on airflow around the inverter. Clear up any dirt and fragments on the heat sink.

• Check all the naked wires to ensure insulation is not damaged by sun exposure, frictional wear, dryness, insects or rats, etc.

• Verify the indicator display is consistent with the actual operation.

• Confirm that terminals have no corrosion, insulation damage, high temperature, burnt/discolored sign, and tighten terminal screws to the suggested torque.

• Clear up dirt, nesting insects, and corrosion in time.

• Check and confirm that the lightning arrester is in good condition. Replace a new one in time to avoid damaging the inverter and other equipment.

DANGER: Electric shock hazard! Confirm all the power is turned off and all the capacitor’s energy has been discharged before performing the above operations.