panapat

Sorry to respond to an old message, but I came across this post whilst searching for the Power board for my 3 kw inverter that actually has the same board as the Growatt. I had two 3 kw inverters in parallel and whilst I was on vacation they both blew up, total short at the battery side. They had only been installed 3 years and at the time they had no load on them, they just where charging my batteries. When I disassembled them, several MOSFET's and TVS had physically blown. I replaced them and they now do fire up but are showing error code 8 which is other component damage somewhere. So I am opting to replace the complete board if growatt will sell me one. I can only assume that it was a lighting strike, although my DEYE inverter was not affected, if anybody has any additional info it would be much appreciated.

I have the same sporadic F55 error on my Deye 8kw, I have reduced my PV to below 230 volts maximum and the issue still happens when the batteries are full. I am pretty sure it's battery voltage related and the fact I presently have no inverter communication with them. I am upgrading the bms so I can communicate and better control what is going on. Additionally, this only happens when the batteries are full and there is no load on them.