When it comes to solar water heaters, be realistic. They're typically only 30% more efficient than any other form of water heater. Second, don't think that just because you shower in the dark means you'll have to deal with cold water. Water heated by solar power should stay warm for 24 hours.
Have financial background checks done on solar panel companies you plan to purchase from. You'll want use a company that will still be in business 20 years down the road. In this way, you can be certain your warranty will be honored and you will be able to get parts and maintenance as needed.
Its target is cheap steam (about 1 cent per kWh = about 3 USD per million BTU) and maneuverable solar electricity at a cost of 3 cents / kWh More details on this …
Before signing any agreement for installation of solar energy products, get at least three estimates. Once the estimates are in your hand, read each one carefully to ensure that the installation is up to your standards. Each estimate should include a time frame of completion, a list of materials and the estimated amount of labor charged.