Solar Heater Rebate

solar heater
a heater that makes direct use of solar energy
Solar water heating (SWH) systems are a mature renewable energy technology which have been accepted in most countries for many years. SWH has been widely used in Israel, Australia, Japan, Austria and China.

rebate
A partial refund to someone who has paid too much money for tax, rent, or a utility
a refund of some fraction of the amount paid
give a reduction in the price during a sale; "The store is rebating refrigerators this week"
cut a rebate in (timber or stone)
A deduction or discount on a sum of money due