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How Many Solar Panels Do I Need?

Trying to figure out how many solar panels you may need to effectively (and cost-effectively) heat your pool and spa is easy with our simple calculator. Simply enter your information below and find out how many solar panels it will take to keep your pool warmer for longer!

Solar Panel Quantity Calculator
Step 1:Pool Size:  ‘ x Measured in feet, (width x length).
Step 2:Shading Factor:Type of pool.
Step 3:Roof Faces:What direction does your roof face?
Step 4:Panel Size:
Step 5:Established Desired Swimming SeasonSee chart below.
Florida Residents – Using the chart to the right, find your location, then choose the corresponding factor number. If you are located between two numbers, use the average. When in doubt, use the larger
Season Sizing Chart
Outside of Florida – Using the map below, find your location, then choose the corresponding factor number. If you are located between two or more numbers, use the average. When in doubt, use the larger number. (To see the potential swimming season for your area, scroll to the bottom of the page).
Solar Panel Map

Enter the swimming season factor number including the decimal point:

What Our Customers Are Saying:
  • Our pool heater is 17 years old and broken. Instead of replacing it with a regular gas heater, we went solar. For only a few dollars more, my original pool builder came out and installed Thermocraft Solar Panels by CMI, and now we are making our money back by not having to pay heating bills anymore! We were paying over $300/ month with the gas heater! I also feel great about "going green" and helping the environment.

    Jessica