I really don't have a good way to measure the amp-hours of just one particular 12V device. I don't think the pump is going to pull too much power.
Currently, everything 12v just runs directly from the 12v battery, with no dc/dc converter connecting the traction pack and the 12v accessory battery. So, by not using the pump at all, wouldn't gain me any range. It might make my headlights run a tiny bit longer, but thats it.
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