How long will I be able to run an invertor from caravan without flattening battery. Invertor 300w. Only use the lcd TV. TV 60watt at 240v and occassional light. 85amp hr battery.
Based on an efficiency of 75% and a safe guide figure for achieving a reasonable battery life of 50% battery depletion, then it would be about 6 hours for a newish battery. As the battery ages it will progressively reduce.
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