Talk to your local government about doing any major solar installations in your home or business. You want to be properly permitted and within building, zoning and construction codes and regulations. However, you may also discover tax credits, rebates and other financial incentives. They may also have data and information about how well certain solar technologies work in your area.
If you're interested in a particular solar panel model, determine when this panel was created. There are very efficient modern solar technologies; however, iffy solar energy salespeople sometimes sell old technology. This older technology is more affordable but you will get much better results with a more recent product.
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.