Solar Swimming Pool Heater - Everything You Need to Know

Taking a swim in your pool can be a great way to cool off after a hot day. Less relaxing is repairing a broken pool heater or paying expensive bills to keep your pool warm.

Depending on your pool and location, solar heaters can be a cleaner and cheaper way to keep your pool heated and ready for use. In fact, in most climates, solar pool heaters have lower annual operating costs and are more efficient than traditional heaters.

What is a Solar Pool Heater & How Does It Work?

Solar pool heaters use the sun’s energy to pump water through your pool filter and a series of solar collectors — devices where the water is warmed in tubular panels by the sun. Once warmed, the water is circulated back into the pool. Solar collectors are often installed on roofs, though they can be placed anywhere with sufficient sunlight. In hotter climates or warm summer months, they can also serve a double purpose by cooling down the pool by routing water through the collectors during the night.

Solar pool heater unglazed

The collectors within a solar swimming pool heater come in two forms: unglazed and glazed.

  • Unglazed solar collectors are often cheaper because they use less expensive material and labor to produce. They are made coated with plastic or durable rubber. The technology is similar to how a garden hose in the sun will eventually heat up and pass that thermal energy onto the water inside.
  • Glazed solar collectors typically use copper tubing with a glass covering. These upgrades make the process more efficient, but it comes at a higher cost. In addition to heating your pool, glazed solar collectors can also be used to heat the water you use indoors all year.

In addition to the solar collectors, many solar pool heating systems also include manual or automated sensors and flow control valves. If the pool is sufficiently heated, water from the solar collectors can be diverted and water from the pool will still be filtered but won’t enter the collectors.

How Much Does A Solar Pool Heater Cost?

Solar pool heaters and installation often costs between $3,000 to $4,000. While the upfront cost of a solar heater can be a bit higher than alternatives, they require very little upkeep and have no associated fuel costs. According to the Department of Energy, they “typically last longer than gas and heat pump pool heaters.” In fact, most properly installed, high quality solar heaters will last up to 20 years.

While the payback period for most solar heaters is between 1.5 to 7 years, the actual time will depend on a variety of factors including:

  • The size of your pool
  • How hot you like to keep your pool
  • The local cost of electricity or gas
  • The amount of sun in your climate
  • How much your roof is shaded
  • Orientation of the solar collectors

Solar Swimming Pool Heater Sizing

According to Swim University’s “Three Quarters Rule,” you’ll need enough solar collectors to cover about three quarters of the surface of your pool. For example, a standard pool size is 15 X 30 feet, or 450 square feet. Your solar collectors’ surface area would thus need to be around 338 square feet. However, if you plan to use your pool all year, you’ll probably want to plan on bumping up from three quarters to 100% coverage. For this example, you would need 450 square feet of available surface area to install your solar pool heaters on. 

Best Solar Pool Heaters of 2021

There are a variety of solar pool heaters on the market but finding the best heater will always depend on the specifics of your home and pool. A few top models we recommend considering include:

SOLAR POOL HEATERS SOLAR PANEL DESIGN TEMPERATURE RAISE SUITABLE FOR
Smart Pool’s S601 Pool Solar Heater Flat 6-10 degrees F In-ground swimming pool
Game 4721-BB Curve Solar Pool Heater Curve 5 degrees F Aboveground and in

ground swimming pools

SunHeater Universal Solar Pool Heater Web 6-10 degrees F Aboveground and in

ground swimming pools

If you’re already considering going solar, adding a rooftop solar photovoltaic system in addition to solar pool heaters can be a great way to consolidate projects. In fact, many installers will install both PV panels and solar collectors.

Solar Pool Heater vs Solar PV Panels

Depending on your home’s roof size, you may not have enough space to accommodate both a solar pool heater and solar panels to power your home. If this situation arises, you’ll need to do a cost-benefit analysis of which system will provide you with greater savings over time.

In general, we’d recommend pairing an efficient electric pool heater and pump with your solar PV. That way, you can power everything with solar and will likely have the best savings. The added electrical needs from the electric pool heater and pump will add only 3-5 solar panels to the system, depending on panel wattage.

Our energy experts are ready to guide you through the rooftop solar process, and help you find the right option for your needs. 

See how much solar panels cost in your area.

Please enter a valid zipcode.


Please enter a valid zipcode.

Zero Upfront Cost. Best Price Guaranteed.

Topics

Find the Best Solar Panels on the Market

When it comes to solar panels, every home is different When looking to install solar for your home, one of the most significant decisions you’ll...

Learn More

How Do Solar Panels Work for Your Home?

Overview: Solar panels contain cells of semiconductive material, usually silicon When subject to sunlight, an electric charge is created due to the photoelectric effect (more...

Learn More

Solar Panel Efficiency - Pick the Most Efficient Solar Panels

You may hear the term “efficiency” thrown around a lot when reading up on solar panels. It sure sounds like a good thing, but what...

Learn More

Solar Inverters: Types, Pros and Cons

Solar energy doesn’t provide electricity in a format that your table lamp could be powered by. Inverters change the power produced by your solar panels...

Learn More

Solar Providers Near Me

When beginning your home solar project, one of the first things you’ll likely do is for search “Solar Providers Near Me.” You’ll likely be presented...

Learn More

Solar Panel Installation Process

Transitioning to power from solar panels is an exciting step for homeowners. There are several steps in the process which ensure the homeowner gets a...

Learn More

Solar Panels to Charge an Electric Car

If you are an electric vehicle (EV) owner or are interested in becoming one, there is also a good chance that you will look into...

Learn More

Tesla Solar Roof: Everything You Need to Know

Elon Musk and the Tesla Solar program released the heavily-anticipated solar roof. The release of the solar roof also prompted a complete overhaul of the...

Learn More

Community Solar

It’s no secret that many of us spend a large portion of our income on energy and electricity bills. In fact, in 2012 we spent...

Learn More

Solar for Condo Owners

Solar for condominium unit owners is gaining steady popularity throughout the country, as more and more states are writing legislation to promote clean energy accessibility....

Learn More