I have access to my roof so that part won't be to much of a problem I'd need to also work out how much amps in current I'd be using. 7 amps is doable but anything drawing over 13 amps would start to get costly. The UK indeed isn't a particularly a sunny place although the sun does shine during winter but I guess you'd need heat from the sun as well. It might be that I'd have to use a bit of energy generated from my solar panels along with some mains power and I could also modify an exorcise bike to generate some more electricity to charge some large batteries and keep myself fit in the process.
