If you invest in a large solar energy system, you could actually make money off of it. If you can pull enough solar power with a collection of solar panels, you may be able to sell your excess electricity to neighbors or even the power company. Contact your local company to see if this could work for you.
Before installing any form of solar panels, be familiar with local rules and regulations. There are lots of places where some permits are required. The last thing you want is to have the system put it and then you are forced to remove it later.
Remember that solar energy can do more than just power your lights. They can provide heat and warm up your water, too. Solar panels can make a significant impact in your overall energy bill. You don't want to be overpaying the power company.
This video will show you how to build a home made solar charge controller featuring : Over voltage protection, Under voltage protection Battery charging …
Once your solar panels are installed, you need to keep track of how much power you are producing and using on a daily basis. Invest in a quality monitoring system and look at the data as often as possible. If you notice your panels are not producing as much energy as usual, it might be time to clean them.