Solar panels reduce the amount of energy used to heat your home and water. While the use of solar panels does cut down your energy costs, they are expensive and it may take several years to recoup the cost in reduced energy costs. Check for government incentive programs to help pay for them.
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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.