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The inverter is on unless physically turned off and therefore always a parasitic loaf when on. When inverting there is some loss( maybe 2-3%) for the electrical “transformation” efficiency. The fridge duty cycle on the yellow energy sticker will give you the annual kw-hrs. Do the math to figure the amp hours needed at 12v.
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SOB
2015 Volvo VNL780 D13, iShift, 32k ET air hitch, Idle Free LiFePO4 APU
16.8KWhr LiFePO4, 2.52 kw solar, 10kva Victron split phase
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