Running high load 120v devices off of 12v batteries is not as easy as buying a large inverter. I have a Magnum3012RV and 630AHr of Lifeline AGMs. I *can* run an AC off of batteries, but it draws 140A from my batteries (besides startup). Drawing large currents like that heat up interconnects, and even the internal resistance of the Lifeline’s have a 0.5v drop at that current. Solar will replace capacity in the batteries, but at 12v you’re still drawing LARGE currents to run an AC; more than most would recommend for longer than short durations. Lots easier to run AC off of a 120v source, be it shore or genny.