The newer Res Fridges are very Energy Efficient and draw only approx 10 to 12 amps from the batteries, provided you have a good Inverter.
More and likey the drop in Battery Voltage was the result of running the Hydraulic Pump to Level and put out Slides. That pump can draw upwards to 80 amps and will pull the batteries down pretty quick.
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Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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