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Outdoor & Recreation
Camping
Portable camping generators and fridges..which one?
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<blockquote data-quote="condor22" data-source="post: 71231" data-attributes="member: 1932"><p>Inverters - Here are some facts and figures, hopefully I won't bore with the science, but it is important. The figures below are actual, off my own inverter.</p><p></p><p>The inverter is a 300W pure sine wave (all I would ever use) running from a 200AH AGM battery setup.</p><p></p><p>To use all 300W (using Ohms Law) - 300 W @ 240 VAC produces 1.25 Amps, however the cost on the 12 volt system is this; 300 W @ 12VDC requires (300 divided by 12) 25 Amps, theoretical. However there are efficiency losses, my measured current draw was <strong>27 Amps</strong>.</p><p></p><p>That's 27 AH or 27 Amps in 1 hour, which is a large amount when you compare the average of my Engel over 24 hours at just over 1 AH per hour (@ 20deg C ambient).</p><p></p><p>I've seen, people on this Forum and others talking about 1000W inverters. It is simple math to work out that a 100AH battery might last between 30 to 50 minutes if you pull 1000W.</p><p></p><p>Camping Inverters are intended for brief infrequent use ie an electric drill for 5 minutes not running an appliance constantly. Or something low current like a phone charger.</p></blockquote><p></p>
[QUOTE="condor22, post: 71231, member: 1932"] Inverters - Here are some facts and figures, hopefully I won't bore with the science, but it is important. The figures below are actual, off my own inverter. The inverter is a 300W pure sine wave (all I would ever use) running from a 200AH AGM battery setup. To use all 300W (using Ohms Law) - 300 W @ 240 VAC produces 1.25 Amps, however the cost on the 12 volt system is this; 300 W @ 12VDC requires (300 divided by 12) 25 Amps, theoretical. However there are efficiency losses, my measured current draw was [b]27 Amps[/b]. That's 27 AH or 27 Amps in 1 hour, which is a large amount when you compare the average of my Engel over 24 hours at just over 1 AH per hour (@ 20deg C ambient). I've seen, people on this Forum and others talking about 1000W inverters. It is simple math to work out that a 100AH battery might last between 30 to 50 minutes if you pull 1000W. Camping Inverters are intended for brief infrequent use ie an electric drill for 5 minutes not running an appliance constantly. Or something low current like a phone charger. [/QUOTE]
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Outdoor & Recreation
Camping
Portable camping generators and fridges..which one?
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