Question

What amp hour battery do I need?

Answer 1

The key is to use the watts you know to calculate the amps at the battery voltage . For example, say you want to run a 250 watt 110VAC light bulb from an inverter for 5 hours. Amp-hours (at 12 volts) = watt-hours / 12 volts = 1470 / 12 = 122.5 amp-hours.7 days ago');})();(function(){window.jsl.dh('_xwyLYOOGJZnP0PEPwrGq-A8105','

Calculating How Big Your Battery Needs To Be - CaravansPlus

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Search for: How long will a 100 amp hour battery last?

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A 100 ah battery should give you (100/10=10) 10 hours of usage. If you use it for 5 mins a day, it could last 120 days.