For families with four people, a solar energy system should produce approximately 5,000 kilowatts. This allows you to wash and dry five loads of laundry a week, run the dishwasher five times a day and power multiple televisions and lights. When deciding on the system, choose one larger than what you think you need. You can always sell the extra power produced to the electric company.
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You will have to pay around five thousand dollars for the solar heating system that you choose. Think how fast you'll make that money back by all of your savings from a lowered power bill. Solar panels can be installed gradually.
Carefully consider the types of solar panels you plan on having installed. Long ago, if you didn't have enough roof space, you'd need very expensive high efficiency mono-crystalline panels. There are now more advanced polycrystalline panels and even thin film panels. If you've got enough roof space, you might wish to look at the size of the panels in relation to their output capacity to avoid having insufficient panels that you need more of later.