Solar solar protection for inverter and battery

[Nyasha]

Hie. How can I size my protective devices for my solar installations because most breakers keep burning out. I'm I missing something?

 

[bigspark17]

What size arrays/inverters and mcb are you installing?

 

[Nyasha]

What size arrays/inverters and mcb are you installing?

6 x 330W panels, 1 x 3kva inverter, 2 X 200AH 12V batteries, 20A AC IN breaker, 20A AC OUT breaker, 63A DC PV breaker single pole, 80A DC Battery Breaker single pole, Surge protector double pole

 

[plugsandsparks]

What system make and model is it ? and what is your supply voltage from grid?
cheers
P&S