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.
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The efficiency of a solar energy system varies a lot depending on its exposure to the sun. If you live in a sunny area, your system should produce enough energy to cover all your needs but solar energy might not be such a good investment if you live in an area where the sky is usually filled with clouds.
Always look for a good and qualified contractor to install your solar system. Just because you are having a new technology installed on your home, does not mean that you should look for new contractors. The type of work is very specialized and having a quality contractor with a proven track record is critical to having your system installed properly