How to install photovoltaic panels without getting scammed

How to Avoid Solar Panel ScamsKnow Your State’s Average Solar Panel Cost . Get Multiple Quotes . Thoroughly Vet Companies Beforehand . Never Sign a Contract Without a Quote . Know What State and Federal Incentives You Qualify for Beforehand . Check for Licensing and Insurance . [pdf]

How much tilt should photovoltaic panels have to be to be effective

To optimize performance, tilt your panels at an angle that is 10-15 degrees less than your latitude. For example, if you live at a latitude of 40 degrees, set your panels at about 25-30 degrees. [pdf]