By Ethan BrooksUpdated November 2026
Choosing an inground swimming pool solar heater comes down to matching the heater’s output to your pool’s volume, your climate and the way you use the pool. This list compares seven options, from full heat pumps to inflatable and DIY collector kits. Each pick is judged on the criteria that matter most: heating capacity relative to pool size, energy source and efficiency, installation complexity, durability, and the patterns owners commonly report after long-term use. This is a research-based comparison, not a set of hands-on tests, so always confirm specifications against the manufacturer’s current documentation before buying.
Our top picks at a glance
- 1
TOP CHOICEBest overall80,000 BTU Pool Heat Pump for In-Ground Pool, 208–240V Inverter Pool HView on Amazon - 2
TOP CHOICEBest for large pools on a budgetDIY Solar Pool Heater Kit – 15-20 Year Life Expectancy (4-4×10 / 1.5" I.D. Header)View on Amazon - 3
TOP CHOICEBest for mid-size poolsBeluga B50V TURBRO 50,000 BTU Inverter Pool HeaterView on Amazon - 4
Best for smaller pools16000BTU Pool Heat Pump, 5.5 COP High Energy Efficient, Up to 5000 GalView on Amazon - 5
Best for extending the seasonExtends Swimming Season, Energy Efficient PE Solar Collector, RollableView on Amazon - 6
Best budget pickGoFloats V2 Inflatable Solar Pool Heaters for Affordable Pool HeatingView on Amazon - 7
Best for medium pools with cooling18000BTU Pool Heat Pump, 5.5 COP High Energy Efficient, Up to 6500 GalView on Amazon
Our Top Picks
Quick Comparison
| Product | Best for | Key feature |
|---|---|---|
| 80,000 BTU Pool Heat Pump for In-Ground Pool (FlowMax80) | Large inground pools needing fast heat | High BTU output with inverter control and smart Wi-Fi |
| DIY Solar Pool Heater Kit (4-4×10) | Budget-minded owners who can do the plumbing | Collector-based solar heating with a 1.5″ header |
| Beluga B50V TURBRO 50,000 BTU Inverter Pool Heater | Mid-to-large pools in moderate climates | Inverter heat pump with heating and cooling modes |
| 16000BTU Pool Heat Pump, 5.5 COP (12’x14′) | Smaller inground pools on standard household power | 110V operation with 5.5 COP efficiency |
| Rollable PE Solar Pool Warmer, 1PC 20FT | Owners who want seasonal, storable solar heating | Rollable 20-foot polyethylene collector |
| GoFloats V2 Inflatable Solar Pool Heaters, 3 Pack | Low-commitment solar heating and surface insulation | Inflatable floating panels, easy to store |
| 18000BTU Pool Heat Pump, 5.5 COP (12’x18′) | Medium inground pools wanting heating and cooling | 5.5 COP with smart heating and cooling |
80,000 BTU Pool Heat Pump for In-Ground Pool, 208–240V Inverter Pool Heater with Cooling for Up to 22,000 Gallon Inground Pools, 16.2 COP Smart Wifi Control, FCC & CEC Certified – FlowMax80
80,000 BTU Pool Heat Pump for In-Ground Pool, 208–240V Inverter Pool Heater with Cooling for Up to 22,000 Gallon Inground Pools, 16.2 COP Smart Wifi Control, FCC & CEC Certified – FlowMax80
Best for: Large inground pools that need fast heat recovery
This unit suits owners with sizable inground pools who want quick temperature rise and smart control. Its listing targets pools up to about 22,000 gallons, which makes it a strong fit for larger backyard installations on a 208–240V circuit.
Key specs
- 80,000 BTU heating output (per listing name)
- Rated for inground pools up to 22,000 gallons
- 208–240V electrical supply
- Inverter-driven operation with 16.2 COP rating
- Smart Wi-Fi control; heating and cooling capability
Pros
- High output suits large pools and cool shoulder seasons
- Inverter operation typically reduces energy use at part load
- Wi-Fi control makes scheduling and monitoring straightforward
Cons
- Requires a 240V circuit, which can add electrical work
- Heat pumps perform less well in very cold air temperatures
Bottom line: The strongest choice for large inground pools where fast, controllable heating matters more than the lowest possible electrical load.
DIY Solar Pool Heater Kit – 15-20 Year Life Expectancy (4-4×10 / 1.5″ I.D. Header)
Highest Performing Design – DIY Solar Pool Heater Kit – 15-20 Year Life Expectancy (4-4×10 / 1.5" I.D. Header)
Best for: Budget-minded owners comfortable with DIY plumbing
This kit suits homeowners who are willing to mount collectors, run supply and return lines and connect to an existing pump. It is a pure solar option, so it works best in sunny climates with a reasonable heating season.
Key specs
- Four 4-foot by 10-foot collector panels (per listing name)
- 1.5-inch inner diameter header
- Manufacturer lists a 15–20 year expected service life
Pros
- Solar collection carries no electricity cost to run
- Header diameter supports reasonable flow through the collectors
- Scales well to larger pools by adding collector area
Cons
- Installation takes time and basic plumbing skill
- Output depends heavily on sun exposure and weather
Bottom line: A practical pick for owners who want solar heat, can handle the install, and have good southern exposure.
Beluga B50V TURBRO 50,000 BTU Inverter Pool Heater
WiFi Enabled, 15.90 COP, IPX4-Waterproof, Electric Swimming Pool Heat Pump for in and Above-Ground Pools, Beluga B50V TURBRO 50,000 BTU Inverter Pool Heater, Up to 15,000 Gallons, 220-240 V
Best for: Mid-to-large pools in moderate climates
This inverter heat pump is aimed at owners who want a balance of capacity and efficiency for pools up to about 15,000 gallons. It also suits people who want an electric option that runs on 220–240V supply.
Key specs
- 50,000 BTU heating capacity (per listing name)
- Rated for pools up to 15,000 gallons
- 220–240V operation
- IPX4 water resistance rating (per listing)
Pros
- Inverter design adjusts output to demand
- Works for both in-ground and above-ground pools
- Wi-Fi-enabled control for remote scheduling
Cons
- Needs a dedicated 240V circuit
- Performance drops in cold weather, as with all heat pumps
Bottom line: A good middle-ground heat pump for owners with a mid-size inground pool and a 240V outlet nearby.
16000BTU Pool Heat Pump, 5.5 COP High Energy Efficient, Up to 5000 Gallons, Smart Heating & Cooling 110V Swimming Pool Heater for Above Ground and Inground Pool 12’*14’*48″
16000BTU Pool Heat Pump, 5.5 COP High Energy Efficient, Up to 5000 Gallons, Smart Heating & Cooling 110V Swimming Pool Heater for Above Ground and Inground Pool 12'*14'*48"
Best for: Smaller inground pools on standard household power
This unit is sized for pools up to about 5,000 gallons and runs on 110V, so it avoids the dedicated 240V circuit that larger heat pumps need. It suits smaller backyard pools with modest heating goals.
Key specs
- 16,000 BTU heating capacity (per listing name)
- Rated for pools up to 5,000 gallons
- 110V operation
- 5.5 COP rating
Pros
- 110V supply simplifies installation
- 5.5 COP is a reasonable efficiency figure for its class
- Heating and cooling modes add flexibility
Cons
- Limited capacity for larger pools or cold climates
- Heat-up times will be slow on pools near its rated volume limit
Bottom line: The right size for a smaller inground pool where simple 110V wiring matters.
Rollable PE Solar Pool Warmer, 1PC 20FT – Extends Swimming Season, Energy Efficient PE Solar Collector
Extends Swimming Season, Energy Efficient PE Solar Collector, Rollable Pool Warmer for Storage Solar Pool Heater for Above Ground & Inground Pools, 1PC 20FT
Best for: Seasonal, storable solar heating
This polyethylene solar collector rolls up for storage, which suits owners who want to extend the swimming season in spring and fall and then put the heater away. It connects to a standard pump circuit.
Key specs
- 20-foot rollable PE collector (per listing name)
- Designed for above-ground and inground pools
- Passive solar heating, no electrical supply needed
Pros
- No electricity needed for heating
- Rolls up for winter storage
- Lightweight relative to rigid collectors
Cons
- Heating depends on sunshine and ambient temperature
- Output is modest compared with heat pumps
Bottom line: Ideal for owners who want a low-maintenance solar extender rather than a full heating system.
18000BTU Pool Heat Pump, 5.5 COP High Energy Efficient, Up to 6500 Gallons, Smart Heating & Cooling 110V Swimming Pool Heater for Above Ground and Inground Pool 12’*18’*48″
18000BTU Pool Heat Pump, 5.5 COP High Energy Efficient, Up to 6500 Gallons, Smart Heating & Cooling 110V Swimming Pool Heater for Above Ground and Inground Pool 12'*18'*48"
Best for: Medium inground pools that need heating and cooling
This 110V heat pump is rated for pools up to about 6,500 gallons and includes cooling capability, which suits owners in warm regions who want to lower water temperature in summer.
Key specs
- 18,000 BTU heating capacity (per listing name)
- Rated for pools up to 6,500 gallons
- 110V operation
- 5.5 COP rating
Pros
- Heating and cooling in one unit
- 110V supply avoids a 240V circuit
- Suitable for both above-ground and inground pools
Cons
- Capacity may be tight for pools near the upper volume rating
- Cooling performance depends on ambient conditions
Bottom line: A sensible step up from the smaller 110V unit for owners with mid-size inground pools who value cooling.
GoFloats V2 Inflatable Solar Pool Heaters for Affordable Pool Heating and Insulation – 3 Pack
GoFloats V2 Inflatable Solar Pool Heaters for Affordable Pool Heating and Insulation – 3 Pack
Best for: Low-commitment solar heating and surface insulation
These floating inflatable panels sit on the water surface, absorbing sunlight and reducing evaporation. They suit owners who want a simple, no-install option to take the edge off cool water.
Key specs
- Three-pack of floating solar heaters (per listing name)
- Inflatable design for easy storage
- No plumbing or electrical connection required
Pros
- Very easy setup and removal
- Surface cover reduces heat loss from evaporation
- Low-cost entry point into solar heating
Cons
- Modest temperature gain compared with plumbed systems
- Can need repositioning and regular inflation checks
Bottom line: A budget-friendly way to add some warmth and insulation, best for mild climates and small gains.
Buying Guide
Match heater capacity to pool volume
Start by calculating your pool’s volume in gallons. Multiply length by width by average depth in feet, then by 7.5. Heat pump listings usually state a maximum gallon rating, and undersizing means long heat-up times. Leave margin for larger pools or cool regions.
Good picks for this: 80,000 BTU Pool Heat Pump (FlowMax80), 18000BTU Pool Heat Pump (12’x18′)
Check electrical requirements
Heat pumps on 208–240V circuits need a dedicated breaker and may need an electrician. 110V units can often plug into an existing outlet, but confirm the circuit’s amperage. Always consult a licensed electrician for panel or circuit work.
Good picks for this: 16000BTU Pool Heat Pump (12’x14′), Beluga B50V TURBRO 50,000 BTU Inverter Pool Heater
Understand efficiency ratings
The coefficient of performance (COP) compares heat output to electrical input. A higher COP means less electricity per unit of heat, though published figures are usually measured under specific test conditions. Use COP to compare models, not as a guarantee of your real-world bill.
Good picks for this: 16000BTU Pool Heat Pump (12’x14′), 80,000 BTU Pool Heat Pump (FlowMax80)
Consider your climate and sun exposure
Solar collectors need strong, unshaded sun and warm air to perform well. Heat pumps lose capacity as air temperature falls. If your season is short or cool, a heat pump paired with a solar cover usually gives more consistent results than solar alone.
Good picks for this: DIY Solar Pool Heater Kit (4-4×10), Rollable PE Solar Pool Warmer (20FT)
Evaluate installation effort
Collector kits require roof or ground mounting, correct pitch, and plumbing with proper check valves and bypass. Heat pumps need a pad, clearance for airflow, and electrical connection. Be honest about your skill level before buying.
Good picks for this: GoFloats V2 Inflatable Solar Pool Heaters (3 Pack), Rollable PE Solar Pool Warmer (20FT)
Look at durability and materials
Collectors are exposed to UV, temperature swings and chemical water, so material matters. Manufacturers often state an expected service life; treat these as estimates that depend on installation and maintenance. Check warranty terms in writing.
Good picks for this: DIY Solar Pool Heater Kit (4-4×10), Rollable PE Solar Pool Warmer (20FT)
Plan for seasonal use and storage
If you close the pool for winter, consider whether the heater must be drained, stored or can stay in place. Rollable and inflatable options store most easily. Rigid collectors and heat pumps usually need winterizing steps.
Good picks for this: Rollable PE Solar Pool Warmer (20FT), GoFloats V2 Inflatable Solar Pool Heaters (3 Pack)
FAQ
How big a heater do I need for an inground pool?
Size depends on pool volume, desired temperature rise, climate and cover use. Use the manufacturer’s gallon rating as a starting point, and choose a unit that exceeds your pool’s volume if you live in a cool or windy area.
Is a solar pool heater better than a heat pump?
Solar heaters have low running costs but depend on sun. Heat pumps provide more consistent heat and work in shade, but use electricity. Many owners combine the two, or add a pool cover to reduce heat loss.
Can I install an inground swimming pool solar heater myself?
Many owners install collector kits with basic plumbing skills, but correct bypass valves, check valves and pipe sizing matter. If you are unsure, consult a licensed pool professional or plumber.
Do solar pool heaters work in cold weather?
They work best when air and water are warm and the sun is strong. Output drops on cloudy or cold days, so solar systems typically extend the season rather than heat the pool through winter.
What is a COP rating on a pool heat pump?
COP stands for coefficient of performance, the ratio of heat delivered to electricity consumed under standard test conditions. A higher number indicates more efficient operation, though real-world results vary with weather and use.
Do I need a pool cover with a solar heater?
A cover reduces evaporation and heat loss, which can noticeably improve results at night and on windy days. Many owners find a cover is the most cost-effective add-on to any heating method.
Should a heat pump be installed on a 240V circuit?
Larger heat pumps usually require 240V supply. Confirm the requirement in the manufacturer’s manual and have a licensed electrician install the circuit to local code.
Conclusion
For large inground pools that need fast, controllable heat, the FlowMax80 and Beluga B50V are strong heat pump choices, provided you have a 240V circuit. Owners of smaller pools on standard household power will find the 110V 16000BTU and 18000BTU units better matched. Solar-minded owners with good sun exposure can consider the DIY collector kit or the rollable PE warmer, while the GoFloats inflatable panels suit light, low-commitment use. Match capacity to volume first, then climate and electrical access, and confirm all specifications with the manufacturer before purchase.
Sources
- Guidance on pool heating efficiency and energy-saving practices for home water heating (energy.gov)
- Pool safety and electrical product safety information for consumers (cpsc.gov)
- Electrical code requirements for pool equipment circuits and bonding
Related reading
- Swimming Pool Heater Solar: 7 Best Options for Above Ground Pools (2026)
- 8 Best Swimming Pool Solar Water Heaters for Every Pool Size (2026)
- Xtremepowerus Solar Pool Heater: Setup, Sizing and Common Mistakes
- What Is a Solar Pool Heater Vacuum Breaker and Why Does It Matter?
About Ethan Brooks
Ethan Brooks is part of our editorial team and reviews and edits our solar water systems guides, checking product details against manufacturer specifications and owner feedback.
