Solar Swimming Pool Heaters


You can significantly reduce swimming pool heating costs by installing a solar pool heater.

Solar Heating is cost competitive with both gas and heat pump pool heaters, and they have very low annual operating costs. Actually, solar pool heating is the most cost-effective use of solar energy in many climates.


How They Work


Explanation of a solar pool heating system

Pool water is pumped through the filter and then through the solar collector, where it is heated before it is returned to the pool. In hot climates, the collector can also be used to cool the pool during peak summer months by circulating the water through the collector at night.


The Black Butte Ranch in Oregon heats its swimming pool with solar thermal collectors.Solar Heated Pool, Butte, Montana


Some systems include sensors and an automatic or manual valve to divert water through the collector when the collector temperature is sufficiently greater than the pool temperature. When the collector temperature is similar to the pool temperature, filtered water simply bypasses the collector and is returned to the pool.

Solar pool collectors are made out of different materials. The type you'll need depends on your climate and how you intend to use the collector. If you'll only be using your pool when temperatures are above freezing, then you'll probably only need an unglazed collector system. Both glazed and unglazed collector systems should include Freeze Protection when used in colder climates.


Most solar pool heating systems include the following:

  • Solar collector — the device through which pool water is circulated to be heated by the sun
  • Filter — removes debris before water is pumped through the collector
  • Pump — circulates water through the filter and collector and back to the pool
  • Flow control valve — automatic or manual device that diverts pool water through the solar collector.


Unglazed Collectors

Unglazed collectors don't include a glass covering (glazing). They are generally made of heavy-duty rubber or plastic treated with an ultraviolet (UV) light inhibitor to extend the life of the panels.

Because of their inexpensive parts and simple design, unglazed collectors are usually less expensive than glazed collectors. These unglazed systems can even work for indoor pools in cold climates if the system is designed to drain back to the pool when not in use.

Even if you have to shut the system down during cold weather, unglazed collectors may be more cost effective than installing a more expensive glazed collector system.


Glazed Solar Collector

Glazed Collectors

Glazed collector systems are generally made of copper tubing on an aluminum plate with an iron-tempered glass covering, which increases their cost.

In colder weather, glazed collector systems—with heat exchangers and transfer fluids—capture solar heat more efficiently than unglazed systems.

Therefore, they can be used year-round in many climates. Glazed collectors also can be used to heat Domestic Hot Water year-round. Both glazed and unglazed collector systems should include Freeze Protection when they'll be used in colder conditions.



Selecting a Solar Pool Heater


A solar pool heating system usually costs between $4,000 and $6,000 to buy and install. This provides a payback of between 1.5 and 7 years, depending on your local fuel costs. They also typically last longer than gas and heat pump pool heaters. Your actual cost and payback depend on many factors.

Installation and Maintenance


The proper installation of a solar pool heating system depends on many factors. These factors include solar resource, climate, local building code requirements, and safety issues. Therefore, it's best to have a qualified solar thermal systems contractor install your system.

After installation, properly maintaining your system will keep it running smoothly for 10–20 years.

Consult with Eco Depot USA and read your owner's manual for maintenance requirements. Your collector should require little maintenance if the pool's chemical balance and filtering system are checked regularly. Glazed collectors may need to be cleaned in dry climates where rainwater doesn't provide a natural rinse.



Eco News & Resources

For the latest news on renewable energy, click here.

For More Information

Sign up here to receive our newsletter:

Privacy Policy

Solar Estimator

Want to know what your cost and payback would be on a renewable energy system?
Click here! Estimate my solar energy system.

Get Started

Click here for a quote on your renewable energy system!

Better Business Accredited connects people to solar energy professionals. NABCEP

Renewable University | Sustainable Community | Products | Company Profile | Client Solutions

© 2009 Eco Depot USA. All rights reserved.

Internet empowerment provided by GS Multimedia