Usually, with the residential fridge they provide more batteries, a 2000 watt inverter and optionally one solar cell/controller etc. You did not mention what equipment you do have. Can you detail that for us?
Also on my RV the inverter runs a number of things not just the fridge. For example, was the electric hot water heater on by any chance? That would use many times more power than the fridge.
Also, when you did this test were your batteries fully charged? That would make a big difference too. As well as the heater running, maybe a satellite receiver, etc???
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2017 Winnebago Adventurer 37F
2016 Lincoln MKX Toad
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