Hi, Have a friend who has a strange issue, they have solar, 1 x 5kw battery (Hubble) and grid, all good when they have grid, but when they have load shedding, the inverter beeps and turns off and shows error 06, What he then does is, turns off the inverter , turns off the battery, turns off the solar. Then turns on the solar, turns on the battery and then turns on the inverter and then he says he has to change the program to sbu from sub. It then will work fine for the 2 hour load shedding. Once the power comes back on, same issue, error 06, he then has to repeat turning everything off and then back on and then he changes it to sub and it works okay.

I am not to familiar with the Growatt inverters as I have the SunSynk, but where could he possibly start looking. Thank you

Possible solutions for the fault: bus resistor and op070