New York Laws
Article 12 - Solar Energy Products Warranty Act
12-106 - Warranties and Service Agreements.

(a) A full one year warranty by the installer against malfunction or
failure of a solar thermal system due to improper installation or a
defect in standard pipe, ducts, switchboxes and hardware utilized in
installation;
(b) A full one year warranty by the system manufacturer and the seller
against a defect in materials, manufacture or design of a solar thermal
system; and
(c) A full three year warranty by the system manufacturer and the
seller against a defect in materials, manufacture or design of a solar
collector, tank or heat exchanger.
3. No person shall offer a service agreement for a solar thermal
system unless such person shall have developed a service capability for
such system.