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Solar panel performance
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Despite the huge numbers of related sites, I am unable to learn how many standard £8-10,000 panels it will take to provide enough for typical 3 bedroomed semi.
I need to know:
1) How much power does such a family house need a day/year
2) How much power does the usual 1.5-2kw unit produce a day in actual usage.
The figures I can start off with are the average generation is 4-6 hours per day, ie 20% of the total maximum if in constant sunlight. So I have a couple of the steps in place but need the others to complete the equation, and can then both see how much of the daily requirement a typical panel produces, and then the number required to provide it all (in theory, as of course even a whole roof full won't work at night).
I need to know:
1) How much power does such a family house need a day/year
2) How much power does the usual 1.5-2kw unit produce a day in actual usage.
The figures I can start off with are the average generation is 4-6 hours per day, ie 20% of the total maximum if in constant sunlight. So I have a couple of the steps in place but need the others to complete the equation, and can then both see how much of the daily requirement a typical panel produces, and then the number required to provide it all (in theory, as of course even a whole roof full won't work at night).
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I have just seen an ad in today's paper that says a 4kw system at just under £11,000 will save you a whole £260 a year off your electricity bill!
Mine is about four times that from memory, an average size house, so for £11,000 they claim (no guarantee, it is the sun you know) you can save about 20% of your total electricity. If you're lucky.
That would make a payback period of over 42 years, were it not for the massive subsidies we pay out of our own bills to make it worthwhile. What a total con. All power generation should be sold on its own merits and if it doesn't work then shouldn't be encouraged to waste everyone's money.
Mine is about four times that from memory, an average size house, so for £11,000 they claim (no guarantee, it is the sun you know) you can save about 20% of your total electricity. If you're lucky.
That would make a payback period of over 42 years, were it not for the massive subsidies we pay out of our own bills to make it worthwhile. What a total con. All power generation should be sold on its own merits and if it doesn't work then shouldn't be encouraged to waste everyone's money.
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