X4
2 independent reviewsRead the findings →Sunseeker's laser-guided mower for mid-sized lawns, with no wire and no aerial. Once mapped, it mows in neat straight lines and rarely gets lost. Its automatic mapping can send it over drops, so map edges by hand.
Updated
Where it sits in Sunseeker Elite’s range
Feedback
What reviewers found
Two home tests. T3 used it on a small sloping garden that sits above a patio, and Trusted Reviews tried it for several weeks on a large, rough lawn with trees, hidden slopes and rabbit holes. They agree on the big points: setup is easy, it never seemed lost, and it mows in tidy straight lines. Both saw automatic mapping go wrong at a drop and switched to mapping by hand, and both wished the cutting height could be set in the app.
T3, hands-on, Apr 2026 (Tested on a small sloping lawn above a patio) · Trusted Reviews, hands-on, A few weeks, Aug 2026
Cut quality and edges
Mixed resultsBoth got neat, straight lines: Trusted Reviews for weeks without satellite help, and T3 even in grass about two inches long. Edges are the weak spot, with Trusted Reviews seeing tufts along fences and T3 still strimming now and then.
Setup and boundaries
Mixed resultsGetting started is simple, with nothing to assemble and no aerial. But automatic mapping drove over a drop to the patio for T3 and charged at steep banks for Trusted Reviews, so both drew part of the boundary by hand.
Navigation
Reviewers rate it highlyOnce mapped, both found it never seemed lost. Trusted Reviews got straight parallel lines for weeks on a lawn with mature trees, and T3 noticed no drop in performance against satellite-guided mowers.
Slopes and rough ground
Mixed resultsT3 found it handled a sloping garden without marking the grass. On Trusted Reviews's rough lawn with steep banks, it went up and down them while mapping, sent errors and needed picking up more than once.
Obstacles and safety
Reviewers rate it highlyT3 watched it slow near toys and a washing-line base and adjust its path without stopping abruptly, and Trusted Reviews also found obstacle avoidance worked well.
Weather
Not enough evidenceNo review we use tested it in rain or on wet grass.
App and software
Reviewers rate it highlyBoth found the app simple and clear. Trusted Reviews says it lacks the deep settings of rivals, and both note cutting height is set on a dial, not in the app. T3 thinks that suits beginners.
Upkeep
Not enough evidenceNo review we use has reported on cleaning or blade changes in use. T3 and Trusted Reviews both note the dock brushes the laser dome each time it returns.
Reliability and support
Not enough evidenceNo review we use has run it long-term or judged Sunseeker's support.
Value
Not enough evidenceNo review we use clearly judged value for money. Trusted Reviews found the manual height dial surprising at the price.
Verdicts come from independent, hands-on, finished reviews. An area needs at least two of them before we say more than “Not enough evidence”. We don't score robots ourselves. How this works
Easy to set up, no aerial
Both testers rate this as the X4's best trait. Trusted Reviews plugged in the dock, charged it, pressed auto-map and watched it trundle off, using its built-in mobile connection before Wi-Fi was even set up. T3 had nothing to assemble beyond a brush that cleans the laser dome each time it docks, and was glad not to position a satellite aerial. The same tester did hit Wi-Fi dropouts through thick stone walls until a mesh node was moved to a windowsill.
Map drops and banks by hand
Automatic mapping has a blind spot for drops. T3's lawn sits a few feet above the patio with no barrier, and the X4 drove straight over the edge while mapping. It didn't flip, but the boundary was then drawn by hand with plenty of clearance. Trusted Reviews saw it charge up and down near-45° banks either side of a flat patch, sending an error and needing to be picked up more than once, so it too mapped by driving the edge like a remote-control car.
Neat, straight lines once mapped
Once it was mapped, both were impressed. Trusted Reviews got perfectly straight parallel lines for weeks without any satellite help, and tweaking the line spacing in the app got rid of wheel furrows. T3 found it never seemed lost, handled the garden's slope, and turned without marking the grass, and it coped with grass around two inches long. T3 noticed no drop in performance against satellite-guided mowers it had tested, and found setup simpler.
Avoids clutter, leaves the edges
T3 watched it slow near toys and a washing-line base, adjust its path and carry on without stopping abruptly. Trusted Reviews also found obstacle avoidance worked well. Edges are the weak spot: Trusted Reviews saw tufts left along fences even though it got close, and T3 says you'll still need an occasional strim. Sunseeker offers an Edge-Reach mode and a mode that drives over flush borders, per the specifications.
One height for the whole lawn
The cutting height is set with a dial on the mower, not in the app. Trusted Reviews found that surprising at the price, because it means one height everywhere, with no longer grass for wildflowers in one zone. T3 rarely changes height anyway and thinks the dial helps keep the cost down. Both found the app simple and clear but lighter on settings than rivals such as Mammotion's, which suits beginners better than tinkerers.
Both reviewers tested the same single X4 model.
Our take
Should you buy the X4?
Best for: Lawns shaded by trees or surrounded by tall buildings. Skip it if: You want a quick setup without correcting the map yourself.
a good choice once you have mapped the boundaries and any drops by hand. If you want different heights in different zones or less strimming, the Ecovacs GOAT A1600 LiDAR PRO adds an edge trimmer, and the Navimow i2 LiDAR has more reviews behind it.
The X4 is Sunseeker's first mower that finds its way with a spinning laser scanner on its roof rather than satellites, with a camera to spot things in its path. There is no wire to bury and no aerial to place, and it can map the lawn by itself. It weighs just over 12kg, and the cutting height is set with a dial on the mower rather than in the app.
Both testers found it neat once mapped. Trusted Reviews got perfectly straight parallel lines for weeks on a rough lawn with mature trees, and T3 found it never seemed lost and coped with grass about two inches long. Automatic mapping is the problem: T3's X4 drove straight over a drop to the patio, and Trusted Reviews saw it throw itself at steep banks and need picking up, so both drew the boundary by hand. T3 watched it slow near toys and adjust its path, and Trusted Reviews also found obstacle avoidance worked well. Both still needed a strimmer at the edges, and Trusted Reviews found the manual height dial surprising at the price, because it means one height for the whole lawn.
Where to buy
Where to buy the X4 in United Kingdom
Red Band
Best priceListed in stock
Dealer · Delivery: check sellerSold by Red Band UKSeller page ·Mow With Us
Listed in stock
Dealer · Delivery: check sellerGoogle Shopping listing ·Winchester Garden Machinery
Listed in stock
Dealer · Delivery: check sellerGoogle Shopping listing ·Prices checked
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Price history
X4 price history in the UK
Good deal Today's £1,082.50 is below its £1,214 average since 3 Oct 2026.
- Today
- £1,082.50
- Lowest seen
- £1,082.501 Nov 2026
- Average
- £1,214since 3 Oct 2026
Before you buy
The questions people ask about this one
Does it need a boundary wire?
No wire and no aerial. It builds a 3D map with a spinning laser on its roof and uses a camera to spot obstacles, per the specifications. Trusted Reviews had it mapping by itself within minutes of unboxing, though both it and T3 ended up drawing part of the boundary by hand.
Does it need a clear view of the sky?
No. It doesn't rely on satellites, so trees and buildings shouldn't throw it off, per the specifications. Trusted Reviews's test lawn had mature trees and it still mowed straight lines for weeks. T3 found it needed decent Wi-Fi during mapping, though its 4G connection kept Trusted Reviews's mower online without Wi-Fi.
Will it cope with my slope?
Sunseeker rates it for 45%, or 24°, using its two rear wheels, per the specifications. T3 found it handled a sloping garden without issue, and Trusted Reviews ran it on rough ground with hidden slopes. The catch is automatic mapping near steep drops, which both testers had to redo by hand.
How close does it cut to the edge?
Not close enough to put the strimmer away. Trusted Reviews saw tufts left along fences, and T3 says occasional strimming is still needed. It has an Edge-Reach mode and can drive over flush borders to cut them, per the specifications.
How noisy is it for neighbours?
Very quiet, according to T3, which says you could run it at 8am on a Sunday without upsetting sensitive neighbours. Sunseeker lists low-noise running but no figure on the X4 page, per the specifications. It also has a night mode, T3 notes.
Alternatives
Other robot lawn mowers to compare.
i2 LiDAR (i208, i210, i215, i220)
Why consider it: Another laser-guided mower built for gardens with trees and buildings, and four reviewers praised its tidy lines and quiet running.
The compromise: Setup can take tweaking and the edges still need a strimmer.
GOAT A1600 LiDAR PRO
Why consider it: Laser-guided too, with a string trimmer on the side that takes on most of the edging.
The compromise: Testers found it struggles on steep slopes and in narrow gaps.
A1 / A1 Pro
Why consider it: Laser guidance with no wire or aerial, mowing in tidy straight lanes on lawns up to 2,000m².
The compromise: It misses small objects on the grass and leaves a wide strip at the edges.
Specs
Full specifications
Each specification names its source. Manufacturer claims are not independent test results; unconfirmed figures are labelled.
Owner reviews
Do you own the X4?
Tell people how it’s held up: cleaning, maintenance, faults and support. Owner accounts are shown separately from independent reviews.
Sources
Where this page’s findings come from
Editorial reviews
- T3: Sunseeker Elite X4 review: A robot mower that feels effortless ↗4 / 5Hands-on · Tested on a small sloping lawn above a patio
- Trusted Reviews: Sunseeker Elite X4 review ↗4 / 5Hands-on, A few weeks
Sources
- Sunseeker Elite: X4 product page ↗Manufacturer
Videos
- Search YouTube for Sunseeker Elite X4 ↗Search results may include company demonstrations or similar models. Check the source and model name; a demonstration is not an independent performance test.