Pool Heating Cost: Gas vs Heat Pump vs Solar
Heating turns a three-season pool into a year-round one — but the three ways to do it have very different price tags. Compare what each costs to install and to run for your climate, then see how a cover changes the math.
Which heater should you pick?
- Gas heats fastest and is cheapest to install, so it suits pools used on demand — a few weekends, a cold snap, guests coming over — rather than all season. It costs the most per month it runs.
- Heat pump costs more upfront but runs at roughly a quarter to a third of gas. It is the value pick for anyone heating steadily through a long season in a mild climate.
- Solar has almost no running cost — only the circulation pump draws power — and lasts the longest, but it needs roof or yard space and warms more slowly. Best where summers are sunny and you keep the pool open for months.
Whichever you choose, add a cover. It cuts running costs by roughly 40–50% because most of the heat escapes from the open water surface.
Solar heating and home solar
Solar pool heating is the gateway to whole-home solar. The same roof that warms your pool can carry electricity-generating panels (PV) that offset your power bill — and unlike pool collectors, PV economics shifted sharply when the federal residential tax credit (25D) expired on December 31, 2025. If you are weighing the roof for one, it is worth pricing the other.
See exactly how the two fit together in our solar pool heating guide, then run the numbers for panels on the solar cost calculator.
Open the solar cost calculatorPool heating cost FAQ
- How much does it cost to heat a pool?
- Installing a pool heater runs roughly $2,500–$4,000 for gas, $3,500–$6,000 for a heat pump, and $3,000–$7,000 for solar. What it costs to run depends on the heater type, your pool's surface area, your local energy price, how many months you heat, and whether you use a cover. Use the calculator above for a figure tuned to your state.
- Gas, heat pump, or solar — which is cheapest to run?
- Solar is cheapest to operate: it heats off the roof, so the only running cost is the circulation pump. A heat pump is next, at roughly a quarter to a third of gas, because it moves heat with electricity instead of burning fuel. Gas costs the most per month but heats the fastest, which makes it the choice for pools used occasionally rather than all season.
- Does a pool cover actually save money?
- Yes — a cover is the single highest-return upgrade for heating. Most of a pool's heat escapes from the open water surface, so a cover cuts running costs by roughly 40–50% regardless of which heater you use.
- Is solar pool heating the same as solar panels?
- No. Solar pool heating uses roof or ground collectors to warm the water directly, while solar panels (PV) generate electricity for your home. They're different systems — but the same sunny roof that can heat your pool can also offset your household power bill, which is why solar pool heating is the natural bridge to home solar.