Just don't accept those offers to install free panels on your house. If you read the fine print, your monthly bill starts out small and as in the offer I got, after so many years the monthly payment increased almost double what I would be paying without panels. I think that company is called Solar City that makes that offer.
I leave a few lights on 24/7 to deter burglars but they have the low energy bulbs in those lamps.
I don't have any panels here. In the summer, I pay about $50 and about $100 in the winter.