It's a great idea to use solar energy, Kevin because the electricity is surely going to be a big ongoing cost. Tropical plants, even shade plants as Daisy recommended, still need a lot of good light for at least 12 hours per day.
Your profile says you live in London UK - not a terribly sunny place, and as I recall it, there's some air pollution related to a very large city as well. If you live up on the top floor of a hi-rise you'd get better light for your solar panels but the sad fact is that solar panels do need sunlight in order to generate energy.
We had a lady on another plant forum that used to overwinter a lot of tropical plants in her basement under lights and it sure was nothing short of a jungle by the time it was warm enough for her to take her plants outside in spring. She used to be on this site sometimes so I'll try to give her a shout out
@joeswife ?? Are you there??
