Solar Thermal System Warranties
A warranty is absolutely integral to evaluating bids. You need to be assured that your solar thermal system will be repaired should anything break down.
Solar thermal systems should carry a basic warranty covering materials and installation for at least one year. You should be able to get extended warranties (perhaps at extra cost) for five to 10 years on some of the key components (i.e. collectors and tubing).
Be aware of all the financial arrangements and exact warranty responsibility of every party involved. Be aware that there may be several parties involved-the dealer, the installer and the manufacturer. Be sure you know whom to contact in case of breakdown. A reputable dealer will be able to direct all your concerns in this area.
Be sure to read your warranty carefully and ask questions of your solar installer.