Solar Water Heater Savings Calculator
Calculate the financial payback and lifetime savings of switching to a solar hot water system for your home based on your current fuel type and usage.
Table of Contents
Current Heating Setup
Solar System Installation
Average: $5,000 - $9,000
Federal Solar Tax Credit is typically 30%
The percentage of your hot water needs met by the sun.
Financial Impact
Estimated Payback Period
Great investment timeframe!
Old Annual Cost
New Annual Cost
15-Year Lifetime Savings
Net savings after paying off system cost
Solar Thermal Energy Formula
Solar thermal systems capture sunlight in roof collectors to heat water. A secondary gas/electric backup heater kicks in on cloudy days or during periods of exceptionally high hot water usage.
Formula Used
Annual Solar Yield = Collector Area * Solar Radiation * Solar Fraction Coefficient
Reference Quick Chart
| Regional Sun Level | Collectors Needed | Typical Annual Fuel Offset % |
|---|---|---|
| High Sun (Southwest US) | 1 - 2 Collectors | 75% - 90% Energy Offset |
| Medium Sun (Central US) | 2 Collectors | 60% - 75% Energy Offset |
| Low Sun (Northeast US) | 2 - 3 Collectors | 45% - 60% Energy Offset |
Recommended Water Heater Products
Tankless Water Heaters
Save up to 50% on energy costs with an endless supply of hot water. Best for active, multi-shower households looking to cut utility bills.
Storage Tank Water Heaters
Reliable and affordable upfront solutions. Delivers high peak-hour volume to ensure you never run out of hot water during busy mornings.