When air conditioning is important, you better go big with your battery capacity. This customer got an 800Ah Victron Signature lithium system will full cold weather charging disconnects. The Victron 3000VA inverter/charger can draw from shore power or a generator at the same time as it draws from the battery bank to power large loads like air conditioners.
Before Lithium
During Installation
800Ah Victron Lithium System