The solar water heating system uses the sun's energy as a souorce of heat to produce hot water for domestic household use. Designed to meet the certification requirements of SRCC 0G-300, solar water heating systems are reliable, and can typically generate from 50% to 80% of your annual household water heating needs from the sun. Your remaining hot water needs can be supplied by your existing electric or gas water heater or boiler. Results will vary based upon on your specific region in the country. Hot water system uses state-of-the-art technology and will provide you with many years of maintenance free and dependable service.