Going with a solar panel system does not mean that you will be ripping off your roof. You can always start small by purchasing outdoor lighting that is run off of solar energy. They'll charge up during the day to light all night, with exception of pre-dawn hours during long winter nights.
A charge controller is a great addition to any solar array, specifically those that are working above 10 watts on a regular basis. These small devices act as "ON" and "OFF" switches to protect your batteries. They prevent overcharging from damaging your batteries and can provide more advanced charging options depending on the make and model.
Overview of Apricus evacuated tube solar collector assembly and installation process.
Saving the environment can start with cleaner water-heating devices. There are a variety of solar powered hot water heaters for you to choose from. They are easily installed in an area of optimum sun exposure or on the roof.