Hi I am looking at going off grid with victron quatro inverter chargers i currently have two solar arrays one is 4.5 kw with a sunnyboy 4000tl inverter and the other is a 6.5 kw with a fronius 5 kw inverter i was wondering can these inverters be used in an ac coupled system off grid using a quatro 15000va and a 10000 va i will also have approx 64 kwh 48 v agm battery bank