The AC voltage of the photovoltaic inverter is too high

What causes a solar inverter to fail?

The AC voltage overrange is the most common failure of the solar inverter connected with the PV grid system. This is because the grid voltage is not constant and it will change with the changing of the load and current. At the same time, the output voltage of the inverter will be affected by the grid voltage.

What happens if a solar inverter is connected in a wrong way?

If the AC wire of the solar inverter is connected in a wrong way, the AC voltage overrange failure may be caused. If the phase wire and zero wire are connected wrongly, then the inverter A phase will show that the line voltage is 380V and the B, C will show that the phase voltage is 220V.

What if my inverter AC voltage is higher than 256v?

If it is indeed reaching 256V + in the middle of the day, and your inverter AC is not higher than 2% over the Feed in point voltage, then this is a complaint with your grid distributor. However if the inverter AC voltage is 2% higher, this is a complaint with your solar installer. Nevdi writes...

Why does my solar inverter have an AC voltage failure alarm?

Finally, if it is confirmed that the AC wire output terminal voltage is normal but the inverter AC voltage failure alarm still exists, the alarm may be caused by the internal sampling system of the solar inverter and users shall contact the inverter manufacturer to solve the problem.

Why isn't my inverter working?

If the voltage with the inverter off is much higher than 240, then a high line voltage from your utility is contributing to the problem. If it is close to 240, then check for a bad connection. The problem may go away on its own if you need to re-run it all in 4 AWG to meet code.

Why isn't my SolarEdge inverter working?

If the voltage with the inverter off is much higher than 240 volts, then a high line voltage from your utility is contributing to the problem. The SolarEdge inverter allows bigger than 6AWG wires on the AC output side, which is where the issue lies according to the error code. (Description: AC voltage surge)