Arc

Yes it was covered, this time both the MPPT board and Main board were changed. The installation seems compliant but now I'm closing the inverter when the humidity level is too high and will build a ventilated aluminum and clay cooled cabinet around.

Well believe it or not. My Growatt board fried for a third time last night. Now I have lost all my faith in this inverter brand... not sure what to do next.

With short spikes and relatively slow monitoring software (because the serial command interface is so slow), you often don't see a short spike (less than about one second) appear in the other measurements, because by the time you make those other measurements, it's already over.

You know what? Mine fried a second time at the end of August. I have been told that Sri Lanka have received a bad batch and are fighting with warranty.
 
Anyway, I also noticed that my installation had no SPD on the AC side, only on the DC side. So I have gotten the AC side fused. Since then the breaker has jumped twice on CEB spikes which I like to believe saved my board from frying. I also got a breaker installed between my batteries and the inverter to be able to completely shut off the inverter in case of emergency. I think those should be part of any installation but learning is still in progress for the providers.

In User 2 mode voltage based setup it stops charging once the bulk voltage is reached, no constant voltage charge, then restarts charging multiple times throughout the day and once solar output is low enough not to reach the bulk voltage remain charging until the end of the day.