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Solar Panels - Information and Questions
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<blockquote data-quote="condor22" data-source="post: 110499" data-attributes="member: 1932"><p>Here's the math using Ohms Law.</p><p></p><p>A 2000 W inverter will produce 240VAC @ a little over 8 Amps.</p><p></p><p>However it will use a bit more than 2000 W @ 12VDC to produce it because of efficiency loss.</p><p></p><p>This means 2000 divided by 12 plus a bit = about 170 AH.</p><p></p><p>So a 120 AH battery will be dead flat in about 40 minutes if you use all 2000 W.</p><p></p><p>(you didn't say how big your auxiliary was)</p><p></p><p>Even a 300W inverter will draw about 29AH if loaded to max.</p><p></p><p>I use a 150W on my aux battery and another the same size in my caravan. If I need any more than that I get the genny out.</p></blockquote><p></p>
[QUOTE="condor22, post: 110499, member: 1932"] Here's the math using Ohms Law. A 2000 W inverter will produce 240VAC @ a little over 8 Amps. However it will use a bit more than 2000 W @ 12VDC to produce it because of efficiency loss. This means 2000 divided by 12 plus a bit = about 170 AH. So a 120 AH battery will be dead flat in about 40 minutes if you use all 2000 W. (you didn't say how big your auxiliary was) Even a 300W inverter will draw about 29AH if loaded to max. I use a 150W on my aux battery and another the same size in my caravan. If I need any more than that I get the genny out. [/QUOTE]
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Outdoor & Recreation
Campers, Vans & 4WD's
Solar Panels - Information and Questions
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