Let’s be real jumping into a Intex pool in the UK without a heater isn’t refreshing it’s a cry for help. We’ve all been there, standing on the ladder, whilst our toe is dipping into 16°C water while the sun hides behind a cloud.
But here’s the good news Heating your pool doesn’t have to bankrupt you. While the big energy companies are hiking prices, the sun is still giving away heat for free. Whether you’ve got a tiny 8ft easy set pool or a massive 18ft XTR frame, I’m going to show you how to hijack the sun and turn your pool into a tropical paradise for zero quid in running costs.
Step 1: Choose Your Solar Weapon
Before you grab your screwdriver, you need to pick the right solar option for to heat a intex pool. In 2026, we generally categorise solar heaters into three main categories based on your garden size and pool type.
| Solar Option | How It Works | Best For | Typical 2026 UK Cost |
|---|---|---|---|
| Solar Mats (EPDM) | Water flows through flat, black rubber mats. | Small to medium Intex pools | £120–£300 |
| Solar Pods (Domes) | Coiled pipes inside a clear plastic greenhouse dome. | Tiny gardens or pop-up pools | £90–£150 |
| Pump & Panel Kits | Pro-grade panels with a dedicated booster pump. | Large family-sized metal frames | £250–£450 |
💡 Expert Tip: Always match your heater to your pump’s flow rate. Specifically, if your pump is too weak, the water will struggle to push through the mats. Conversely, if the pump is too strong, you might pop a seal on a cheaper solar pod.
Don’t Make The Solar On The Roof Mistake
We see this every year someone tries to be clever and puts their solar mats on the garage roof. Unless you’ve upgraded to a high end Sand Filter Pump, keep them on the ground.
Specifically, you do not need a plumber or a roofer. You simply use standard Intex Hose Adaptors to click the mats into your existing filter line. Furthermore, because there is no drilling or roof climbing involved, you avoid the risk of damaging your property or voiding your pump’s warranty.
A intex hose adaptor is a universal translator for your pool gear. Specifically, Intex uses two different pipe sizes: 32mm for small pools and 38mm for the big ones. This usually makes adding a heater feel impossible because the hoses simply will not fit.
However, these adaptors bridge that gap instantly. They allow you to click a small hose into a big pump or heater without any DIY stress. Because they feature professional grade rubber seals, they stop leaks before they start. You can upgrade your setup for a few quid instead of buying a whole new system. It is the cheapest, smartest way to customise your pool for the 2026 season!
🚀 Intex Adaptor Finder 2026
Find out exactly what you need to get your pool set up today.
💡 Fun Fact: The Sand Filter Pump
Think of a Sand Filter Pump as the pro version of a pool pump. Instead of using paper filters that get slimy and gross, this beast uses actual sand to scrub your water clean.
Why it is a total game changer:
- Lazy Sundays: You only change the sand every five years. Consequently, you can stop washing paper filters every weekend.
- Crystal Clear: It catches tiny bits of dirt that paper filters miss. Therefore, your water actually sparkles.
- Powerful Flow: It has the muscle to push water through long solar mats. Specifically, it is the only pump that can handle a big heating setup.
The Expert Verdict: If you want a pool that stays clean and hot without the hard work, this is the best upgrade you can buy in 2025. It is fast, powerful, and pays for itself in saved filter costs!
Why put on the ground? Because small Intex pumps are “low-head” systems. Consequently, they often struggle to push heavy water up onto a high shed or garage roof. Keep your mats on the grass or decking in a south-facing spot to capture the most UK sun.
Step 3: Use the “Slow Flow” Secret
If you want the best results, do not run the water through the mats at full speed. This is the biggest mistake I see beginners make.
Instead, you should install a Bypass Valve. This clever little gadget allows you to divert just a portion of the water through the heater. By creating a “slow trickle,” the water stays in the sun for longer. As a result, the water returning to your pool is significantly hotter than it would be at full flow.ly.
Connect to the Filter Pump Line
Luckily, your standard Intex filter pump is the perfect “engine” for this system. You simply divert the water from the pump into the solar mats before it returns to the pool. Furthermore, you should keep the mats on the ground. Since small Intex pumps are low-pressure, they often struggle to push water up onto high shed roofs.
Keep your mats or pods laid out on the ground, decking, or shed roof — anywhere that gets consistent sun. A south-facing spot works best in the UK.
Use the “Slow Flow” Secret
If you want the best results, don’t run the water through the mats at full speed. Instead, use a bypass valve to create a slow trickle. By doing this, the water stays in the sun for longer, meaning the return flow is significantly hotter.
✅ Best type: “400–500 micron blue/silver” solar cover (they work best in British climates).
✅ Bonus: It keeps bugs and debris out too.
INTEX POOL CALCULATOR
Calculate your 2026 Solar Savings
Estimated Volume: 6,500L
EPDM Mats Needed: 2-3 Mats
Solar Pods (Domes): 3-4 Pods
Solar Panel Kits: 1 Kit
Electric Heater Bill (Est): £112.90 / mo
Your Solar Bill: £0.00
As stated by ofgem “Every 3 months we review and set a level for how much an energy supplier can charge for each unit of energy and daily standing charge, under the price cap.”
Currently, our savings are based on the official Ofgem Jan–March 2026 price cap of 27.69p per kWh.
Does Solar Work in Cloudy British Weather?
Yes—and this is the part most people don’t realise. Solar mats don’t need “blue sky” days to work. Because they capture diffuse radiation (heat that passes through clouds), they can still reach temperatures of 30°C on an overcast day. Therefore, while a heat pump might be faster, solar is the undisputed king of “free” warmth in the UK
Want to see the data? We explain the actual physics behind this in the Science of Diffuse Heat section of our master guide, where we show how grey skies still provide free energy.
The Verdict: Solar vs. Heat Pumps
Sites like HeatPumps4Pools will tell you that a £1,000 heat pump is the only answer. However, for a temporary 15ft pool, that is often overkill. Ultimately, for the average UK family, a chain of three solar mats and a high-quality cover provides the best “warmth-to-pound” ratio available today.