Grid Overvoltage

My PV inverter keeps shutting off: why it happens and what you can do

You have a PV installation and notice that the inverter shuts off by itself during the day, especially during peak production hours. It usually recovers after a while, only to do it again the next day. If you have access to the manufacturer’s app (Fronius Solar.web, DEYE Cloud, Hoymiles S-Miles, etc.) and see error codes like OV-G, Vac > 253V, Grid Overvoltage, AC Voltage Out of Range, or equivalents, the inverter isn’t broken: it’s doing its job.