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P.S. — A rough estimate is that each 100 Amp-hours (at 12.8 VDC) of battery capacity (1,280 Watt-hours) powering an inverter at 90% efficiency, will be able to deliver 1,150 Watt-hours at 120 VAC to an air conditioner.
When using Power Saver or equivalent A/C, that is one hour’s worth of cooling. For van campers with efficient air conditioners, each 100 Ah of 12.8 VDC useable battery capacity should provide +/- one hour of cooling at rated A/C capacity.
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