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Solar Hot Water Performance Information
Kilowatt hours & Therms saved throughout the United States
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The performance of a Solar Hot Water system is affected by many changing variables including
available solar energy, the solar collector(s) installed pitch and orientation, ground water
temperature and ambient air temperatures, and the daily household hot water demand comprised of bath,
kitchen and laundry uses. These conditions, which may vary from home to home even in the same neighborhood,
determine how much energy your solar system will save. The maps below show an estimate of annual
energy saved in Kilowatt hours (electricity) and Therms (natural gas, propane and fuel oil).
(Performance specifications are subject to testing and calculation inaccuracy of 20%.)
Sample Savings Calculation
The maps below can be used to estimate annual money savings.
Ex: A family of 4 people with a 96 SFT system in Arizona will save 2400 kWH x $0.14/kWH = $336/yr or 92
Therms x $1.25/Therm = $115/yr.
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Estimated Kilowatt hours (electricity) saved in the United States
Subject to change without notice
Estimated Therms (natural gas, propane and fuel oil) saved in the United States
Subject to change without notice
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