Most solar cells are made of polycrystalline or monocrystalline silicon. Polycrystalline cells are most common as the relation of price and efficiency is quite good. Thin film solar cells are more expensive, but have some significant advantages to others.
Factors like climate, site, design, and heating needs of a house determine what kind of hot water solar system is best for your home. Active systems require an electrical pump, whereas passive systems work without electricity and rely on gravity.
Solar Lease is an option of going solar for people who do not wish to purchase an own solar system. But on the long run savings are not as high as they would be with a purchased solar system. Leasing can also mean dependence on a solar company.
Because of the state's high electricity prices, solar power in Hawaii is more financially beneficial than any other region in the country, and Hawaii is working hard to create a sustainable future for its solar energy.