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Buy Sell Trade / Re: FS: 2017 SR ZF13.0
« on: December 05, 2017, 09:01:11 AM »
What is the difference between the S-13 and the SR-13? Care to say why you are selling it? Any issues with it?
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The rule of thumb is that bright, direct sunlight delivers about 1000 watts per square meter, so a 3M square panel would receive about 9000 watts worth of sunlight. Given a conversion efficiency of 15%, that means they'd put out about 1350 watts electrical power in peak sunshine. There must be some sort of storage, or more likely, the system is grid-tied. They may be saying it's "completely solar powered" because they expect the usage duty cycle to be fairly low, and the average power the solar panel puts into the grid should about equal the power used by charging vehicles.