This calculation is based upon numerous assumptions and actual results will vary considerably. For this estimate we have assumed the solar collector for water heating is flat-plate glazed collector with 3 square-meters of surface area.
An actual site assessment by a renewable energy Professional is recommended to better determine your specific needs.
For other calculation tools, please see the "Helpful PDF's and Links" listed at the bottom of your Estimate.
Go to www.find-solar.org