A good rule of thumb is to multiply the amp draw by 10 to get a rough idea of how many Amps the inverter will be drawing from the batteries.
You would need a LOT of batteries to effectively run this heater off an inverter. To run your heater for 1 hour, you would need a minimum of 83 Amp-hours of capacity, and that would drain the battery flat dead. This is HARD on starting batteries, so you'd want to use deep cycle or golf cart batteries. Here again though you don't want to draw them flat dead, generally only down to 50% capacity, so you'd need at least twice as much capacity as you think you need to run the inverters.
Golf cart batteries are about 100 Amp-hours in capacity, but are only 6 Volts. You'd need 4 of them configured to provide 200 Amp-hours and 12 Volts, MINIMUM, for this to run the heater for 1 hour. Then you need to charge them back up, which means either plugging in or running the coach for SEVERAL hours. This is not something you'd want to do to just move the coach across the yard.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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