eufy Robot Lawn Mower E15

Buy the eufy C15 Robot Lawn Mower for a small, level lawn where noise and price matter most, and the eufy Robot Lawn Mower E15 if your lawn is bigger or you want 4G and app-controlled cutting height without extras. Both use cameras only, with no wire or RTK station, and both share the same slope limit of 32.5%.

The main differences, from eufy's specifications:

• Lawn size. The C15 is rated for 500 m² and the E15 for 800 m². We'd treat about 400 m² and 650 m² as comfortable working sizes.
• Cut. The C15 cuts 180 mm wide against 203 mm. Its height is set with a knob on the mower; the E15's is set in the app.
• Noise. Measured sound power is 58.2 dB(A) for the C15 and 66.3 dB(A) for the E15, a clear gap.
• 4G. Built into the E15. On the C15 it's an optional plug-in module, and without it there's no GPS theft tracking.
• Obstacles. eufy says the C15's TrueVision system recognises pets and small animals.
• Garage. Included with the UK E15; not confirmed for the UK C15.

Prices start from £999 for the C15 and £1,159 for the E15, and eufy discounts both often. Once you add the C15's 4G module, the gap narrows, so compare the total you'd actually spend. Neither suits steep gardens, and both carry the same two-year warranty.

Only a gentle one. eufy rates the eufy Robot Lawn Mower E15 for slopes of 18 degrees, which works out at 32.5%. That covers most lawns that look flat or slightly tilted, but not steep banks or terraced gardens.

The figure causes some confusion because eufy's own product copy and user guide print "40%" next to 18 degrees. The two don't match: 18 degrees is roughly 32.5% when expressed as a gradient (rise divided by run). eufy's comparison page for the C15 lists the E-series as 32%, which agrees with the maths, so we use the lower number.

For context, many wire-free rivals at a similar price are rated for 45% or more, so the E15 is at the cautious end. A slope rating is also a best case. Wet grass, soft ground and slopes that run across the mower's path rather than straight up and down all reduce grip, so a lawn that measures close to the limit on a dry day may cause wheel slip or stalls after rain.

If you're unsure about your garden, measure the steepest part over a metre or two and convert it to a percentage. Our slopes guide shows how, and explains why degrees and percentages are so often mixed up. If your lawn is steeper than about 18 degrees, look at mowers with a higher rating on our wire-free hub instead.

No. The eufy Robot Lawn Mower E15 needs neither a perimeter wire nor an RTK reference station. It finds its way with a pair of cameras, which eufy calls V-FSD, and uses image recognition to tell lawn apart from paths, borders and obstacles. The only fixed hardware is the charging base, and eufy includes a garage for it in the UK box.

There is a satellite receiver inside, but eufy says it is there for anti-theft tracking over 4G, not for steering. That means tall hedges, trees and the side of the house don't cause the signal problems they can for RTK mowers.

Camera navigation has its own rules. eufy asks owners to clear, or mark as no-go zones, anything under about 5 cm tall or smaller than 10 × 10 cm, such as hoses and small toys. It also needs light to see, so it isn't one for night-time schedules (which you'd want to avoid anyway for hedgehogs).

Set-up happens in the eufy app, which builds the map and lets you edit zones and no-go areas afterwards. The E15 is rated for 800 m² and slopes up to 32.5%, so check both numbers against your lawn. Our navigation guide explains how camera, RTK and LiDAR systems compare.

Louder than eufy's headline figure suggests. The manual for the eufy Robot Lawn Mower E15 gives a measured sound power of 66.3 dB(A), which is at the noisier end for a robot mower.

eufy's marketing quotes about 56 dB. That matches the sound pressure figure in the same manual, a different measurement taken at a distance from the machine, so it always comes out lower. Most mower brands quote sound power, which is why we compare on that basis. Neither number is wrong; they just aren't interchangeable.

In practice, a robot mower is still much quieter than a petrol mower. If neighbours are close, schedule it for daytime hours and check the cheaper eufy C15 Robot Lawn Mower, which eufy measures at 58.2 dB(A).

Not to mow. The eufy Robot Lawn Mower E15 works over your home Wi-Fi without any plan, and eufy lists no subscription for the mower itself. You only pay if you want to keep its built-in 4G running once the free data runs out.

The 4G link does two things. It lets you check on and control the mower from the app when you're away from home or when your Wi-Fi doesn't reach the far end of the garden, and it powers GPS theft tracking. According to eufy's user guide, the mower comes with free trial data on first use, after which you buy a data plan through the eufy app. eufy doesn't say how long the trial lasts or publish UK plan prices, so check in the app before relying on it.

Worth knowing: the satellite receiver inside the E15 is only used to locate the mower if it's stolen, not to steer it. eufy quotes a GPS accuracy of about 20–30 m for this, which is enough to find the right street rather than the right garden. If the data plan lapses, mowing, schedules and zones carry on as normal over Wi-Fi; you just lose remote access and tracking.

If strong Wi-Fi reaches the whole lawn and you're not worried about theft, you can skip the plan. Otherwise, weigh the ongoing cost against the other security steps in our theft and security guide, and see how 4G works on robot mowers for UK coverage issues.

eufy rates the eufy Robot Lawn Mower E15 for lawns up to 800 m², but it makes most sense on lawns of about 650 m² or less. Like most manufacturers, eufy gives a maximum mapping area rather than a comfortable working size, and a mower run at its limit has little slack for wet weeks or fast spring growth.

Two other figures matter. The cut is 203 mm wide, which is on the narrow side, and eufy quotes 90 to 110 minutes of mowing per charge with a similar time to recharge. On a large lawn that means several charging cycles to cover everything, so allow plenty of scheduled hours.

The shape of the garden counts as much as the area. eufy's app can join separate lawns with pathways up to 60 m apart, and extra base stations (sold separately) each hold their own map, which helps with front-and-back layouts. Narrow gaps and lots of small beds slow any mower down.

If you don't know your lawn's area, our lawn size tool will measure it from a map. For under about 400 m², the smaller eufy C15 Robot Lawn Mower may be enough; for more than 800 m², look at larger-rated wire-free models.