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.
Edison nickel cadmium solar power batteries.The cheapest solar batteries you can buy and will live for 50 years or more.
Contact your insurance agent to find out if a solar energy system could be included in your insurance policy. Expect your homeowner's insurance premiums to go up once your system is installed and consider switching to a different insurance agency if you find that your premiums have become too expensive.