Before installing solar panels on your roof, check with your home owners association. Some associations have restrictions on what you are allowed to do to the outside of the property, and this might mean solar panels are not an option for you. It is better to have this information up front than to purchase the panels and be forced to remove them at a later time.
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Position solar panels on the east or west side of your home or business. Since the sun travels from east to west throughout the day, placing solar panels on areas of your roof that face north or south is a waste. You'll get much better energy returns by following the same path as the sun.
If you are planning on meeting with a consultant to install a solar panel system, you need to make sure you are prepared. Have a list of all electrical appliances along with their wattage and the number of hours you use them on hand. Any good consultant will need to know this information before a solar panel can be installed.