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Quote: Originally posted by stormcrow on 19/10/2004
hi stu seen panels mounted on van roof thought hey would they power the ole battery or would they power the kettle, if so how do you go about it ?
Solar panels produce a lot less power that might be assumed.
A 40 Watt panel, will cost about £200, but will only produce 40 Watt in very bright sunshine. A realistic average is 1/2 that amount at the most, so that gives us about 20Watts for about 12 hours of daylight, less in winter. On a typical british overcast day you might get only 10Watts out of a 40watt panel.
So our £200 panel produces on average 240Watts\hours in a day. A 110Ahr leisure battery costing about £40 holds about 1375Watts\hours.
So if a 110ahr leisure battery lasts you about a week, a 20watt solar panel will just about keep up with your power consumption.
You could power a kettle from soalr panels, but to power a 1000Watt one on an overcast day I reckon you would need approx £15,000 worth of solar panel.
------------- Stuart.
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