Solar pool heating

How solar pool heating works, in under a minute.

Runs on the pump you already have Adds months to your swim season DIY kits or professional install
  1. 01Learn how it worksYou’re here
  2. 02Compare solar heating systems
  3. 03Get a free system design
  4. 04Install it, or have it installed
Follow the water

Cool water up. Warm water down.

Solar pool heating is a loop. Your pump sends water up to panels on the roof, the sun warms it, and it returns to the pool. The cycle repeats all day, and the warmth builds.

A home with solar pool heating panels on the roof and the pool below
Solar pool heating water flow Blue supply rises to the lower collector manifold. Representative parallel channels transition from blue to amber. Amber water follows the upper manifold and return riser to the pool. Dashed connections and pipe assignments are illustrative, following the supplied hero composition. solar supply riser lower manifold absorber 01 absorber 02 absorber 03 absorber 04 absorber 05 absorber 06 absorber 07 absorber 08 absorber 09 absorber 10 absorber 11 absorber 12 absorber 13 absorber 14 absorber 15 absorber 16 absorber 17 absorber 18 absorber 19 absorber 20 absorber 21 absorber 22 absorber 23 absorber 24 upper manifold solar return riser
Pool water up to the panelsWarmer water back to the pool
01

The pump

It runs on the pool pump you already have — the one that circulates and filters your water every day. When solar heating is on, filtered water flows up to the panels on your roof.

02

Inside the panel

Inside each panel, water moves through dozens of small tubes, picking up heat as the sun warms them.

03

Back to the pool

Warmer water returns to your pool, gradually raising the temperature as the cycle repeats.

04

Solar pool cover

When you’re not swimming, a solar pool cover lets sunlight in, reduces evaporation, and holds that warmth in.

Shop GeoBubble covers →

Illustrations are simplified. Equipment, valves, and plumbing vary by installation.

Every system has a valve that sends water to the roof. You can turn it by hand, or add a solar controller that opens it by temperature: set the number you want, and it handles the rest. Automation & Control →

Your swim season

Add months to your swim season.

Most unheated pools are comfortable for 3–4 months a year. Sized to your pool and climate, a solar heating system holds swimmable temperatures for 4–10 months — and a cover keeps the heat you’ve gained from escaping overnight.

Where’s your pool?

Enter your ZIP code and we’ll show your climate zone, or tap one below.

Four seasons · Northern California, Oregon, Utah, Colorado, the central Plains, the mid-South, the mid-Atlantic, and the Carolinas.

Find my system → Free System Design →
Today
Unheated pool
3–4 months
Typical swim season
Warm enough only at the height of summer
With solar heating
5–8 months
Estimated swim season*
5–6 on its own · 8 with a solar cover
Solar heatingWith a solar cover
JanFebMarAprMayJunJulAugSepOctNovDec

*Typical for a residential pool in that climate. Your season also depends on sun exposure, wind, panel area relative to your pool’s surface, and whether you use a cover.

$0
Fuel bill
The sun supplies the heat. There’s nothing to buy, burn, or refill.
2–3years
Typical payback
Then the heat is free, season after season.
10+years
Panel lifespan
Panels stay on the roof year after year. The only running cost is the pump you already run.
A system sized around you

How much solar does your pool need?

Start with your pool. Shape the system around your conditions and the way you want to swim.

Your pool. Your conditions.01 / 04
A pool seen from above, with solar panels on the roof beside it
Your swimming season
Plan for your swimming monthsIllustrative
01Your pool size
Surface area, not gallons, drives the sizing. A bigger surface loses more heat to the air and needs more panel area to keep up.
02Your sun & weather
Where the panels can go and how much sun they see — roof direction, shade from trees, wind across the pool — sets how much heat you can collect.
03When you want to swim
Your preferred water temperature and the months you want to swim set the goal. A longer season means more panel area.
04How you keep the warmth
A cover holds the heat you’ve gained. With one, the same panel area carries a longer season.
Find my system size → Get a free system design →

Get a starting size, then confirm the fit for your roof and plumbing.

Savings

See what solar could save you.

Three answers, nothing to submit. Your estimate shows up right here.

Estimated annual heating savings
$ —

Your number appears here the moment you tap See my savings.

Compare solar heating systems →Free System Design →
Installation

Choose how you want to get started.

Install it yourself

Comfortable with basic plumbing and a weekend on the roof? Our DIY kits pair panels with the connections and panel hardware designed to work together, and every system comes with written and video installation guides. Roof fasteners and sealant come from your hardware store — ask us what your roof needs.

Explore DIY kits →Installation guides →

Have it installed

Prefer to hand it off? Tell us where you are and we’ll check installer options in your area. Either way, you get the same panels and the same free system design behind them.

Find an installer →
Reviews

What homeowners say after the first warm swim.

You’ve got questions. We’ve got answers.

Is this the same as the solar panels that make electricity?

No. These panels don’t generate power. Pool water flows through them, picks up heat from the sun, and returns to the pool. There’s no inverter, no batteries, and no electrician involved.

Does solar heating work for above-ground pools?

Yes. The system is sized to your pool’s surface the same way, and the panels — you’ll also see them called solar collectors — mount on a ground rack, a patio cover, or a nearby roof, with adapters that connect to flex hose or PVC plumbing. Our above-ground kits are built for exactly that.
Above-ground solar heaters →

Can I use my existing pool pump?

Most systems run on the pump you already have. A 1 HP pump handles most single-story installations; 1.5 HP is the usual call when the panels sit on a two-story roof or the total pipe run passes 150 feet. A variable-speed pump gives you both: turn it up while solar is heating, turn it down for filter-only hours, and save on the electric bill either way. A free system design confirms the fit for your pump, roof height, and plumbing run before you buy.

What happens at night or on cloudy days?

No sun, no heat gain — the panels only add warmth while the sun is on them, and less on an overcast day. An automatic controller bypasses the panels whenever they’re cooler than the pool, so you never send heat back up to the roof, and a cover holds the day’s warmth in overnight.

Will it work in my climate?

Anywhere the sun does — the difference is how many months it adds. Mild-winter regions can carry a pool most of the year; four-season and cold-winter climates are about stretching spring and fall on either side of summer.
See typical seasons by climate →

How fast will my pool warm up?

It depends on your starting temperature, the weather, your panel area relative to the pool, and whether you cover it. Solar heating builds warmth over repeated days of circulation rather than in one afternoon — and holds it, as long as the sun keeps coming up.

Is it free to run?

The heat is. Sunlight costs nothing, and the only energy the system uses is the pump that circulates your water — the same pump that already runs every day to filter it. Many homeowners run solar on their existing daily pump cycle.

How much does a solar pool heater cost?

DIY kits for a typical residential pool run from about $1,500 to $4,000, depending on panel count; professional installation adds labor. The savings calculator above estimates payback for your pool and your current heater.
See what solar could save you →

How does solar compare to a gas heater or a heat pump?

Gas heats fastest and has a fuel bill every time it runs. A heat pump runs on electricity and slows down as the air cools. Solar runs on sunlight and the pump you already own, so there’s no fuel bill, and it does its best work on the same sunny days you want to swim. Many pools pair solar with a cover and need nothing else.

Does it have to go on my house?

Roofs are the usual spot because they’re sunny and out of the way, but panels can also go on a ground rack or a patio cover. Available space, sun exposure, and the plumbing run decide what works for your yard.

How many panels do I need?

Enough panel area to match a large share of your pool’s surface — more if you want a longer season. Our panel guide walks through the math, the sizing tool on the kits page gives you a count, and a free system design confirms it for your roof and climate.
How many panels do I need? →    Compare solar heating systems →

How long do solar pool heating panels last?

10+ years is typical. The panels have no moving parts and sit in the sun doing one job; warranty terms vary by brand.

Do I still need a cover?

You don’t need one, but it’s the single biggest help you can give a solar system. A solar pool cover lets sunlight in during the day and stops evaporation at night, which is where most pool heat escapes. Panels add the heat; the cover keeps it.
Shop GeoBubble covers →

Installation guide

Step-by-step from layout to first swim.

Real experts

Real people, real answers. Call (619) 312-4822, Mon–Fri 8–5 PT.

Protected shipping

Packed to arrive perfect. Ready to install.

Free system design

See what solar heating could look like for your pool.

Tell us your pool size, where you live, and the season you’re after. Our designers size a system to it — panel count, layout, and a parts list — free, with no pressure to buy.

Get my free system design Compare solar heating systems →

Or call (619) 312-4822 · Mon–Fri 8–5 PT