I know a fair bit as I studied them for one of my degree modules earlier this year.
Don't use it myself as I'm in rented accomodation and I dont have large amounts of money to use on something like that.
If you have it you do still have to use electricity as electricity is what the panels produce. In the UK you'd still have to use national grid as it's simply not sunny enough here.
personally I wouldn't use it, I'm a firm beleiver that wind and wave power and geothermal power are much more effective technologies.
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