X3 Gen 2
Limited evidenceRead the findings →Sunseeker's entry satellite-guided mower, with no wire or aerial. It sets up quickly and cuts open, fairly flat lawns neatly. It leaves corners and edges uncut, though, despite its extra edge disc.
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Where it sits in Sunseeker Elite’s range
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What we know
IOTDomotica, a Dutch site that had already tested the bigger X7 Gen 2, used the X3 Gen 2 for some time on a small lawn with no obstacles along its borders. It found setup quick, the app good and the systematic lanes a big step up from its old boundary-wire mower. What let it down was the finish at the edges: corners were cut off and strips left along the borders, despite the extra edge disc. The slope claim is untested.
IOTDomotica, hands-on, Apr 2026 (Tested on a small flat lawn)
Quick setup, no aerial
IOTDomotica had the lawn mapped successfully within ten minutes, helped by lessons learned on the X7 Gen 2: start the mapping from a corner of the lawn next to the dock. There's no aerial to site, because satellite corrections arrive over mobile data, per the specifications. The app worked well, with editable, saveable maps and automatic firmware updates, though IOTDomotica would like to edit schedules for several days at once.
Tidy lanes, poor corners
Out in the open, IOTDomotica was pleased: it mows row by row and finished its lawn in about 20 minutes, where the old wire-guided mower wandered at random for over two hours. The edges were the letdown, though. Even set to mow close, it left a strip along the border and cut corners off early, leaving tufts, although the test lawn had nothing beside it to avoid. Sunseeker claims the edge disc reaches within 3cm, per the specifications. The tester hopes a software update will help.
Simpler than its bigger siblings
Cutting height is set with a dial, 20–60mm, which IOTDomotica didn't mind because it keeps one height everywhere. It has no lights or night vision, so the tester advises mowing in daytime, which also protects hedgehogs. It avoided clearly visible obstacles in the test. With front-wheel drive and a 30% slope rating, per the specifications, IOTDomotica suggests the all-wheel-drive X5 or X7 for hilly gardens or ditch banks.
Our take
Should you buy the X3 Gen 2?
Best for: Small, fairly flat lawns with a clear view of the sky. Skip it if: Trees or buildings block the sky over much of your lawn.
worth a look for a fairly flat, open lawn of a few hundred square metres if you want wire-free mowing with no aerial. For tidy edges the Mammotion LUBA mini 2 AWD 1000 has a better-proven edge disc, and in a shaded garden Sunseeker's own X4 does not depend on satellites.
The X3 Gen 2 is the entry model in Sunseeker's X Gen 2 range. It gets its satellite corrections over mobile data, so there is no aerial to put up, and cameras help it see the lawn and dodge things. A small second blade disc on its side is meant to trim close to the edge, and Sunseeker rates it for lawns up to 800m².
IOTDomotica, a Dutch site that had already tested the bigger X7 Gen 2, used it for some time on a small lawn with no obstacles along its borders. It found setup quick and the cut neat in the middle of the lawn, but corners and edges were left uncut despite the edge disc. Cutting height is set with a dial rather than in the app, there is no night camera, and Sunseeker says the mobile data service is free for two years before it needs a subscription.
Where to buy
Where to buy the X3 Gen 2 in United Kingdom
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We’re still looking for more United Kingdom retailers for this model.
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Before you buy
The questions people ask about this one
Does it need a boundary wire?
No wire and no aerial. It uses satellite positioning with corrections sent over its built-in 4G module, plus cameras, per the specifications. IOTDomotica had its lawn mapped within ten minutes, though it recommends starting the mapping from a corner of the lawn next to the dock.
Will it cope with my slope?
It's rated for 30%, per the specifications, with its front wheels driving and a steering wheel at the back. IOTDomotica's lawn was flat, so the limit is untested. For steeper gardens, the tester points to the all-wheel-drive X5 or X7, which are rated for much more.
How close does it cut to the edge?
Sunseeker claims 3cm with the side edge disc, per the specifications. IOTDomotica found it fell short of that: even in close-edge mode it left a strip along the border and tufts in the corners, on a lawn with nothing beside it to avoid. Keep the strimmer.
Is there a subscription for 4G or anti-theft?
Yes, after two years. Sunseeker includes 24 months of the network satellite service and 4G, then charges an annual renewal, and it's needed to keep using the mower, per the specifications. IOTDomotica thinks that's reasonable given the running costs of the service.
How noisy is it for neighbours?
Sunseeker quotes 60dB, per the specifications. IOTDomotica didn't measure noise, but because the X3 Gen 2 has no night vision, it recommends mowing during the day anyway, roughly late morning to afternoon, to avoid dew and wildlife.
Alternatives
Other robot lawn mowers to compare.
LUBA mini 2 AWD 1000
Why consider it: A compact all-wheel-drive mower whose side edge disc leaves far less trimming than most robots.
The compromise: Raised borders still need a strimmer, and early software limited how far apart your lawns can be.
i2 AWD
Why consider it: All-wheel drive for bumpy, sloping lawns up to 1,000m², usually with no aerial to fit.
The compromise: You'll still need to strim the edges.
E15 Robot Lawn Mower
Why consider it: Camera-only guidance and one of the quickest setups going, on flat, tidy lawns up to 800m².
The compromise: Testers with bumpy or damp grass had it slipping and getting stuck.
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 X3 Gen 2?
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Sources
Where this page’s findings come from
Editorial reviews
- IOTDomotica: Sunseeker Elite X3 Gen 2 review ↗Hands-on · Tested on a small flat lawn
Sources
- Sunseeker Elite: X3 Gen 2 product page ↗Manufacturer
Videos
- Search YouTube for Sunseeker Elite X3 Gen 2 ↗Search results may include company demonstrations or similar models. Check the source and model name; a demonstration is not an independent performance test.