I just finished taking out a NOCold 1200 propane/electric RV refer and installing a 21 CuFt home unit which I
posted here. We boondock often... usually 5 days at a time so it's taken me several years to finally decide to switch
To power it, I created a separate system by adding four AGM batteries (500 AH) and a separate transfer switch, a 1000W PSW Inverter, and a separate 100 Amp charger getting it's 120V power from the block heater outlet in the engine area.
I just finished a test run on battery power and at the start with 13.2V my inverter was drawing 7.5 Amps as the battery voltage dropped the amps increased to 8.3 at 12.4 V. At one point the amps jumped up to 22 and I'm wondering what's going wrong:h ... it was heating the ice tray to harvest the ice. :B
Even figuring a 75% duty cycle (18 hours run time) that's aprox 144 AH/day so almost two days before needing to recharge this battery bank.