Best Robotic Pool Cleaner for UK Pools: How to Match One to Your Pool
Most guides to the best robotic pool cleaner UK buyers can get hold of will hand you a single winner. That is the wrong way round. The right robot depends on the length of your pool, whether your walls need scrubbing, and how much you want to spend. This guide is for UK pool owners who are actively choosing, and it walks you through the decision before it names the cleaners.
One thing up front, because it matters. We sell and service these robots, so this is a retailer’s guide, not an independent lab test. We have named the limits of every cleaner below, including where we would tell you to buy something else.
The short answer
There is no single best robotic pool cleaner in the UK, but there is a best one for your pool. For small and above-ground pools up to 8 metres, the Dolphin E10 does the job simply and cheaply. For a mid-size pool up to 9 metres where you also want the walls and waterline cleaned without a cable, choose the iGarden M1-50. And for a large pool up to 15 metres, the Dolphin M500 is the machine we fit most often.
| Cleaner | Pool length | Cleans | Corded or cordless | Price |
|---|---|---|---|---|
| Dolphin E10 | Up to 8m | Floor | Corded | £855 |
| iGarden M1-50 | Up to 9m | Floor, walls, waterline | Cordless | £710 |
| Dolphin M500 | Up to 15m | Floor, walls, waterline | Corded | £3,050 |
Prices correct at the time of writing. Check the product page for current pricing and stock.
Start with your pool length, not the brand
Pool length is the first filter, because a robot rated for a shorter pool will not cover a longer one properly. Measure your pool, then shortlist. So a 6 metre garden pool and a 14 metre indoor pool need genuinely different machines, no matter which brand you like.
Buying too big is the more common mistake. A large robot costs more, weighs more and gives you nothing extra in a small pool. Meanwhile buying too small leaves parts of a big pool untouched, which is worse, because you end up brushing anyway.
Corded or cordless: the honest version
Corded robots give you unlimited runtime and steady power. Cordless robots give you no cable to trail across the garden, but you charge them between cleans and the battery ages over time.
Neither is simply better. Still, there are real differences worth knowing before you buy.
A corded machine plugs in and keeps going, so a long cycle on a big pool is no problem. However, you handle a cable, and cables can tangle, which is why better models fit a swivel. A cordless machine is quicker to drop in and lift out, though runtime caps what it can do in one go, and a battery is a wearing part you will eventually replace.
Because a cordless cleaner carries a lithium battery, buy from a UK retailer who supports the product, and charge it as the manual tells you. Then, if something goes wrong, you have someone to call.
Floor only, or walls and waterline too?
Floor-only cleaners cost less and solve the main problem, because most debris sinks. But they leave the walls and the waterline to you.
If your pool grows algae on the walls, or you get a scum line at the surface, then a cleaner that climbs and scrubs the waterline saves you real work. That capability is where a chunk of the price difference sits. So be honest about which problem you actually have.
What a robotic pool cleaner costs to run
A robotic cleaner costs pennies per clean, not pounds. Ofgem set the average electricity unit rate at 26.11p per kWh for standard variable direct debit customers from 1 July to 30 September 2026. Robotic cleaners typically draw somewhere around 150 to 200 watts, so a cycle of 1.5 to 2.5 hours works out at roughly 6p to 13p in electricity.
Then add consumables. Filters and brushes wear, so budget for replacements every year or two. Even so, the running cost is small next to the time it gives back.
he three we would put in front of you
Dolphin E10, £855, best for small and above-ground pools
Best for a small pool and a simple life. The Dolphin E10 suits pools up to 8 metres, including above-ground types, and at 6.3kg it is light enough to lift in and out without a second person. It runs a full cycle in about 1.5 hours, the filter is a top-access basket you rinse in seconds, and it carries a two-year warranty.
Who should not buy it: anyone with a pool over 8 metres, or anyone whose main complaint is algae on the walls. Because the E10 cleans the floor only, it will not touch your waterline.
iGarden M1-50, £710, best cordless all-rounder
Best if you want no cable and full-surface cleaning. The iGarden M1-50 suits pools up to 9 metres and cleans the floor, the walls and the waterline. It runs cordless with a 5 hour battery, offers four cleaning modes plus app control, holds a 4.5 litre filter basket, and comes with a two-year warranty. So it costs less than the E10 while doing more, which surprises people.
Who should not buy it: anyone who never wants to think about charging, and anyone with a pool longer than 9 metres. A battery is also a wearing part, so plan for that over the machine’s life.
Dolphin M500, £3,050, best for large pools
Best for a big pool you want cleaned properly, without you in it. The Dolphin M500 handles pools up to 15 metres and scrubs the floor, walls and waterline with a triple active scrubber. Cycle options run 1.5, 2.5 or 3.5 hours, an 18 metre swivel cable keeps it from tangling, and a gyro helps it map the pool rather than wander. You also get remote control, the MyDolphin Plus app, a caddy, and a three year warranty on all parts. Maytronics reduced it from an RRP of £3,660.
Who should not buy it: anyone with a pool under 10 metres. It is a lot of machine, and a lot of money, for a pool that does not need it.
What to avoid when buying
Avoid buying on headline price alone, because the cheap robot that cannot reach your waterline still leaves you brushing. Watch for these too.
A cleaner rated for a shorter pool than yours. It will miss ground, however good the reviews are.
No UK support. If nobody here services the machine or stocks the spares, then a small fault becomes a bin job.
Vague filter claims. A fine filter catches sand and silt, while a coarse mesh lets it straight back into the water.
Ignoring your pool surface. Some brushes suit tiles and concrete, while soft vinyl liners want a gentler setup, so check compatibility before you order.
When we would tell you to buy elsewhere
If you run a commercial or public pool, none of the three above is the right answer, so talk to us about a commercial machine instead. And if your pool sits between 10 and 15 metres but the M500 is out of budget, then it is worth waiting and saving rather than buying a cleaner that cannot reach.
That is the whole point. A robot that suits your pool pays you back in time. One that does not will sit in the shed.
FAQ
What is the best robotic pool cleaner in the UK? It depends on your pool length. For pools up to 8 metres, the Dolphin E10. For pools up to 9 metres where you also want walls and waterline cleaned cordlessly, the iGarden M1-50. For pools up to 15 metres, the Dolphin M500.
How much does a robotic pool cleaner cost to run? Roughly 6p to 13p per cleaning cycle in electricity, based on Ofgem’s average rate of 26.11p per kWh for July to September 2026 and a typical draw of 150 to 200 watts. Then add filter and brush replacements every year or two.
Are cordless robotic pool cleaners as good as corded ones? For most domestic pools, yes. Corded models give unlimited runtime and steady power, so they suit long cycles on big pools. Cordless models are easier to handle, though you charge them between cleans and the battery wears over time.
Do I need a cleaner that scrubs the walls and waterline? Only if you get algae on the walls or a scum line at the surface. Otherwise a floor cleaner handles most of the debris, because it sinks.
How long should a robotic pool cleaner last? Several years with sensible care, provided you rinse the filter after each clean and store it out of frost. Repairability matters as much as the badge, so check that spares and UK servicing exist before you buy.
Choose the one that fits your pool
Match the machine to your pool length first, then decide whether you need the walls doing. Pick the Dolphin E10 for a small or above-ground pool, the iGarden M1-50 for cordless full-surface cleaning, or the Dolphin M500 for a large pool. You can compare the whole range in our pool cleaning and maintenance section, and if you are new to all of this, our beginner’s swimming pool guide is the place to start. Still unsure? Tell us your pool length and surface, and we will tell you honestly which of the three, if any, suits it.