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Solar heater for an above-ground pool

Updated: October 2026

The frame pool is up, the water is cold, and one black mat looks as if it should be enough. A solar heater for an above-ground pool only helps when the collector area and the pump match the pool you own. You should finish knowing whether one mat is a fair trial on an 8–12 ft pool, and when a 3 m strip is the better lay. The [solar pool heater comparison](/hub/swimming-pools/solar-pool-heater) holds the listings. Products Compared used amazon.co.uk extracts from 16 October 2026. There is no lab test. A qualifying purchase through our links can earn a commission at no extra cost to you.

The frame pool is up, the water is cold, and one black mat looks as if it should be enough. A solar heater for an above-ground pool only helps when the collector area and the pump match the pool you own.

Our top picks

Steinbach Steinbach Speed Solar 3 m

Best overall

Steinbach Steinbach Speed Solar 3 m
7.8/10about £70.48
View offer
Steinbach Steinbach Compact 6 m

Alternative

Steinbach Steinbach Compact 6 m
7.8/10about £108.49
View offer
Intex Intex 28685 mat

Preis-Tipp

Intex Intex 28685 mat
7.4/10about £17.99
View offer
On this page
  1. 1.The pool you actually have
  2. 2.What one mat can and cannot do
  3. 3.The 3 m strip on a 12 ft pool
  4. 4.Pump and cover

The pool you actually have

These pools are seasonal frames and inflatables, mostly 8–15 ft, on a lawn for a few warm months. The number that matters is the water surface. UK Pool Store’s heating guide puts a 12 ft round at about 10.6 square metres. Their pump column starts at 1/3 hp for that 12 ft size. That PDF is a guide to their own kits, not a test of an Intex mat. An 8 ft round has a smaller surface. A 3 m by 2 m frame is about 6 square metres if those are the waterline sizes you measured. Volume is only the seller’s ceiling. The Steinbach 3 m strip is listed up to 12 cubic metres. The Intex ceiling is 30,280 litres. A ceiling is the largest pool the seller will name. It is not a promise that one mat will lift it.

What one mat can and cannot do

The Intex 28685 mats are about 120 cm square, roughly 1.44 square metres. The about £24.49 listing describes the absorber as about 1 m by 1 m. Either way, one mat is small beside a 12 ft pool of about 10.6 square metres. Jacksons’ PoolSolar chart, written for that firm’s EPDM boxes, puts a 12 ft round on one 4 or 5 square metre box. That box is not one Intex mat. The Intex bullet claims about 3–5 degrees, depending on the pool and the weather. UK reviews describe a sunny-day lift on small pools, and some owners used two mats. A Covers4pools handbook, which mixes solar with other heating, talks about 2–4°C above unheated water. Those are claims and a handbook range. The cheapest trial is the Intex at about £17.99. The about £24.49 listing prints 32 mm fittings and 38 mm adapters. On an 8 ft pool, one mat is a fair experiment in full sun. On a 12 ft pool it is a taster. The buying guide holds the percentage rules of thumb.
Steinbach Steinbach Speed Solar 3 m

Testsieger

Steinbach Steinbach Speed Solar 3 m
7.8/10about £70.48
View offer

The 3 m strip on a 12 ft pool

The Steinbach Speed Solar 3 m is 0.7 m by 3 m, about 2.1 square metres, listed up to 12 cubic metres, at about £70.48. Salt water and 32/38 mm fittings are stated. That is more plastic in the sun than one Intex mat, and it is still under half of a 10.6 square metre surface. This comparison’s top pick is that strip when you can lay at least 3 m in the sun and you will buy hose, because Steinbach’s page says hoses are not included. One UK review describes two strips on a 12 ft pool of about 6,900 litres and a real temperature lift. Two strips are about 4.2 square metres. Skip a single 3 m strip if the pool is well above 12 cubic metres. The 6 m file raises the ceiling to 20 cubic metres, at about £108.49, but its review count is the same block as the 3 m listing, and salt water is not restated. If the lawn cannot take a sunny 3 m run, the extra area is theoretical.

Pump and cover

The pump that came with the pool is often the part that fails first. Intex caps the mat at about 1/3 hp or 7,570 litres per hour on the listing that prints the litre figure. Steinbach wants 2,000–10,000 litres per hour, at no more than 1 bar at 20°C. A kink can stop a pump that would otherwise cope. UK reviews mention a C1000 with no flow once the mat is in circuit. An inflatable does not get a special hose size. If the hose is 32 mm or 38 mm, you are in the printed pattern. If it is neither, the joint will not seal. You still need a cover at night, because the plastic gives the afternoon’s heat back after dark. SPATA says the UK climate often needs a second heat source for a chosen temperature. Connection order is on the how to connect page. RLSS UK’s residential note is about supervising children, not a temperature target.

Common questions

What did reviewers with small pools report?
The extracts have no separate reading for an 8 ft pool or a 3 m by 2 m pool. UK Intex reviews describe a sunny-day lift on small pools, sometimes with two mats. One UK Steinbach review describes two 3 m strips on a 12 ft pool of about 6,900 litres. Those are owner accounts, not a lab test.
Is the pump that came with the pool enough?
It can be, if it already turns the pool over and sits inside the flow window. Intex prints about 1/3 hp or 7,570 litres per hour. Steinbach wants 2,000–10,000 litres per hour. A kink can stop a pump that would otherwise cope. If flow dies only with the mat connected, flatten it and add a bypass before you buy another pump.
How many strips suit a pool around 12 cubic metres?
One Steinbach 3 m strip is listed to 12 cubic metres and about 2.1 square metres. The UK review that reports a lift used two strips on about 6,900 litres, about 4.2 square metres. The 6 m file raises the ceiling to 20 cubic metres, with a shared review count. If the strip cannot sit in the sun, the ceiling on the box does not help.
Is an inflatable a different hose size?
These listings print 32 mm and 38 mm adapters, not a separate inflatable size. The about £24.49 Intex mat and the Steinbach strips that state fittings use that pair. The about £17.99 extract prints no diameter. Measure the outlet. If it is neither size, budget for hose or the joint will leak.
When is a heat pump the better product?
Choose a heat pump or a proper electric heater when you need a set temperature on a dull week, or when the lawn cannot hold several square metres. SPATA says UK solar heating often needs that second source. These mats are a sunny-day add-on for a seasonal pool, and a poor match for a warm swim in September cloud.

Related pages

Best solar pool heater

Solar pool heater

Solar pool heater buying guide: area, hose and pump

How to connect a solar pool heater after the filter

Solar pool mat vs solar panel: an Intex mat or strip

Sources

Retailer rules of thumb for collector area, Steinbach’s own hose and flow notes, Intex low-flow support, SPATA on UK heating, and the English permitted-development rules for solar equipment. Listings are the amazon.co.uk captures for these seven ASINs. Prices on amazon.co.uk move.

  1. AG Budget PoolSolar (retrieved 17 October 2026)
  2. Allswim PoolSolar PDF (retrieved 17 October 2026)
  3. ManoMano UK: solar pool heater buying guide (retrieved 17 October 2026)
  4. Steinbach Compact solar collector 3.0 x 0.7 m (retrieved 17 October 2026)
  5. Steinbach Compact solar collector 6.0 x 0.7 m (retrieved 17 October 2026)
  6. Intex: no or low water flow of the solar mat (retrieved 17 October 2026)
  7. SPATA: swimming pool heating factsheet (retrieved 17 October 2026)
  8. GPDO 2015, Schedule 2, Part 14 (retrieved 17 October 2026)