Informed customers make better choices: If you are thinking about buying a photovoltaic system and need some quality assurance information, check out our
PV Performance Database. You can search this database for manufacturer brands and installer companies. Look out for systems of the same brand or systems in your ZIP code area and check the respective performance numbers. The performance should be at least 70%, preferably better than 80%. Otherwise the equipment is malfunctioning and isn't worth your money.