Welons Inverter FAQ

A: Our services include inverter product support and smart energy management solutions. Remote technical assistance is provided by our headquarters service team, while replacement services are offered by distributors or installers. They can also assist you in designing and installing photovoltaic systems. For any inquiries, please contact our service department by letter or submit an online request.

A: The basic configuration includes solar panels, inverters, mounting brackets, cables, and installation accessories. For large-scale power stations, auxiliary equipment such as transformers and distribution cabinets is also required.

A: Grid-connected photovoltaic systems are typically used; however, in the following regions, we recommend employing household energy storage systems:

Remote Areas: Power supply in remote areas is often unstable or difficult to connect to the traditional grid. Household energy storage systems can provide a stable power supply in these regions, meeting residents' basic electricity needs.

In regions with high electricity costs: Home energy storage systems can be integrated with residential photovoltaic systems to enable a self-generated and self-consumed electricity model.

A: This depends on the actual usable area of your roof. Generally, a 1-kilowatt system requires an area of 10 square meters.

A: Set the multimeter to the AC voltage range and measure the AC output terminal; it should display 220V or 380V. If not, sequentially check whether the terminals are loose, the AC switch is closed, and the protector switch is open. If the customer is using a hybrid energy storage inverter, it will switch to off-grid mode during a power grid interruption.

A: Product repair or replacement does not interrupt or extend the warranty period; the replaced machine or equipment automatically inherits the remaining warranty period of the original unit.

A: Our inverter fans operate in maintenance-free mode, so no cleaning is required when no fan alarms are detected.

A: The inverter detects excessively low ground insulation resistance at the string terminals (PV+ and PV-) for both PV+ and PV-. According to safety regulations, the inverter must cease operation; otherwise, there is a risk of electric shock.

1. Use a resistance megohmmeter to check whether the insulation resistance between PV+ and ground and between PV-and ground is less than 2 MΩ; this confirms the issue lies with the string.

2. If another inverter is present on site, swap the inverters and check their status. If the fault is transferred to the inverter, it can be confirmed as an inverter failure; if the fault is not transferred, inspect the PV string of the original inverter.

3. Close the inverter switch and disconnect the PV terminals connected to the inverter. Try feeding power into the inverter group by group and perform grid connection. If an error is detected in a single group, it indicates a string-level issue; check for problems such as damaged cables or water ingress in the PV terminals.

A: There is typically a certain margin of error between the two measurement points, resulting from sampling accuracy and AC line losses between them. The actual energy consumption is determined by the meter reading. If significant discrepancies are observed, the AC-side cable should be inspected and optimized.

A: 1. Weather conditions such as cloudy, foggy, or rainy days reduce sunlight exposure, thereby decreasing photovoltaic power generation.

2. Inspect the photovoltaic panels; dust, debris, or shading can also reduce their power generation output.

3. Check the input voltage and current of the inverter for any abnormalities.

4. Inspect the wiring; excessive length, excessive winding, or incorrect specifications can lead to excessive wear.

A: Inverter overtemperature protection prevents equipment damage caused by excessive heat, typically resulting from the following causes and corresponding solutions: 1. Poor ventilation in the installation environment: Clear debris around the inverter, ensure ventilation openings are unobstructed, and avoid placing the inverter near high-temperature equipment; 2. Excessively high ambient temperatures during summer: Install a sunshade above the inverter to reduce ambient temperature; 3. Abnormal internal heat dissipation: If the alarm persists despite eliminating external factors, contact the dealer or installer to check for fan malfunctions or dust accumulation on internal heat sinks.

A: First, confirm whether the power grid is functioning normally (check if other household appliances are powered). If the grid is operational, follow these steps for troubleshooting: 1. Check whether the inverter emergency stop switch has been pressed; if so, reset it. 2. Inspect the inverter's AC output terminals for looseness and verify that the AC switch is not tripped; if loose, tighten them; if tripped, reset the switch. 3. Check the inverter's display panel for fault codes and troubleshoot based on the code indication (e.g., overvoltage, overcurrent, etc.). 4. If no issues are found after the above checks, contact remote technical support or on-site personnel to inspect the equipment.

A: The inverter can remain in standby mode for extended periods without deliberate shutdown, but two precautions should be observed: 1. Ensure stable power supply during standby (for prolonged inactivity, turn off the main inverter switch to minimize standby power consumption); 2. Regularly monitor the inverter's condition—check the display panel at least monthly to confirm no fault alarms and clear surrounding debris while maintaining proper ventilation.