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what generator required
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<blockquote data-quote="flyerdave" data-source="post: 460295" data-attributes="member: 29967"><p>First of all thanks for your help. This is a project of interest as I may be going off grid sometime in the future.</p><p></p><p>Sorry guys I should have made things a little clearer. Average consumption per day is about 4kwh. I have read elsewhere that an inverter has about 85% efficiency (please advise if you think this is incorrect) when converting to UK mains voltage. I understand that you can only reduce battery levels to about 50% therefore if I wish to cover 4KWh I will require about 9.4kw in terms of batteries.</p><p></p><p>if i am correct, 9400 watts / 12volts = 784 amps - so about 4 x 200 amp (AGM) batteries.</p><p></p><p>Therefore, 4000 /.85 = 4706 watts / 24 hours = a generation of 197 watts per hour required. (have I got this correct)?</p><p></p><p>Allowing for a little more and so the gen would not be at max output, would a 250 watt low RPM brushless alternator with bridge rectifiers to convert to dc do the job?</p><p></p><p>Thanks</p></blockquote><p></p>
[QUOTE="flyerdave, post: 460295, member: 29967"] First of all thanks for your help. This is a project of interest as I may be going off grid sometime in the future. Sorry guys I should have made things a little clearer. Average consumption per day is about 4kwh. I have read elsewhere that an inverter has about 85% efficiency (please advise if you think this is incorrect) when converting to UK mains voltage. I understand that you can only reduce battery levels to about 50% therefore if I wish to cover 4KWh I will require about 9.4kw in terms of batteries. if i am correct, 9400 watts / 12volts = 784 amps - so about 4 x 200 amp (AGM) batteries. Therefore, 4000 /.85 = 4706 watts / 24 hours = a generation of 197 watts per hour required. (have I got this correct)? Allowing for a little more and so the gen would not be at max output, would a 250 watt low RPM brushless alternator with bridge rectifiers to convert to dc do the job? Thanks [/QUOTE]
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