Fox ESS Error Code-1 No Utility, Error Code-26 Grid Voltage Fault, Error Code-27 Grid Frequency

Wolfenden12
Posts: 5
Joined: Sat Aug 19, 2023 6:35 pm

So I wasn’t looking in the right place! The breaker had tripped so I reset it and all was fine for 2 days, happened again yesterday and today. I’ll call installer tomorrow but what could it be? Seems to start when I force charge battery overnight? I also have an ashp that has been running more as it’s so cold, shall I just leave the breaker off and should I be worried?
Dave Foster
Posts: 1557
Joined: Thu Oct 13, 2022 7:21 pm

Wolfenden12 wrote: Sun Jan 12, 2025 3:32 pm So I wasn’t looking in the right place! The breaker had tripped so I reset it and all was fine for 2 days, happened again yesterday and today. I’ll call installer tomorrow but what could it be? Seems to start when I force charge battery overnight? I also have an ashp that has been running more as it’s so cold, shall I just leave the breaker off and should I be worried?
If it is happening when charging it is very likely the breaker is not rated correctly or is faulty - what inverter size do you have, and can you have a look at the breaker and see what it’s rating is (B16, B20 etc.. or post a picture of the breaker)

For now leave the breaker on, once I know the rating if you have access to the inverter panel and don’t mind going into settings we can change the max battery charge current which should stop it from popping until the installer comes out.
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