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Last reviewed: November 2026. Sources last checked November 13, 2026. We have not tested these mowers: requirements and limits below are what each maker states.
A robot mower without a perimeter wire finds its way in one of three ways: satellite positioning corrected by RTK, cameras, or LiDAR, and most current models combine two of them. The question that decides which suits you is how much of your lawn has open sky above it. An open lawn suits RTK; Husqvarna says its wire-free system is "perfect for homeowners with large, open yards with clear sight of the sky." Under trees or next to tall walls, makers turn to LiDAR or add cameras to back up the satellite signal. A small, simple lawn can run on cameras alone, and in heavy shade some makers still offer a wire.
The three approaches side by side
| Satellite RTK | Camera vision | LiDAR | |
|---|---|---|---|
| How it locates itself | Satellite position, corrected by a reference station in your yard or by correction data over the internet | Cameras recognize grass and edges | A laser scanner maps the yard and its surroundings |
| What makers say it needs | Open sky over the antenna and the mower: 135° (Husqvarna), more than 110° (Navimow), at least 90° (Mammotion); internet for cloud or network corrections | Light; some limit night mowing | No satellites or internet for positioning |
| Weak spots makers acknowledge | Trees, walls and buildings blocking the sky | Low light, according to Dreame | Very dark surfaces, glass, heavy rain or fog, according to Dreame |
| Examples on sale in the US | Husqvarna Automower iQ (EPOS), Navimow X3, Worx Landroid Vision Cloud, Lymow One Plus | Eufy E15 Gen 2 | Navimow i2 LiDAR, Mammotion LUBA mini 2, Ecovacs GOAT A3000 and A2000 |
Satellite RTK: precise in the open
RTK corrects a satellite position against a fixed reference. NOAA's National Geodetic Survey describes it as producing positions "relative to a fixed (stationary) base station with expected relative accuracies in each coordinate component on the order of a centimeter." Mower makers use the same idea at yard scale. Husqvarna calls its EPOS system "a satellite navigation technique that provides centimeter-level accuracy in seconds."
The corrections come from one of two places:
- A reference station in your yard. Husqvarna says it "requires an open sky view (135-degree cone) and access to a power outlet," and warns that if the station "is moved after you have created your virtual boundaries, your map will need to be re-created."
- The internet. Some models get corrections from the maker's servers instead. Navimow says that "where Network RTK coverage is available, there's no need to install a local antenna," and Worx says its "RTK Cloud delivers corrections to each individual mower — with no hardware to install at home." That needs a connection across the lawn: Husqvarna's cloud option "requires a constant internet connection, either through a mobile network or Wi-Fi," and Husqvarna adds that "Husqvarna Cloud coverage is not the same as cellphone coverage."
Makers are direct about what blocks the signal. Navimow writes that "if there are obstructions, such as high walls, dense trees, and buildings, the GPS signals are likely to get blocked," and that its antenna needs "a more than 110° unobstructed view of the sky." Mammotion, in a 2023 post about its original LUBA, said "both the Luba mower and RTK reference station require at least a 90° open-sky view of your lawn," and advised against the mower where tall walls or trees cover more than 30% of the lawn. Lymow even states the limit without corrections: its One Plus can mow 0.025 to 0.037 acre for up to 10 minutes without RTK.
That is why many RTK mowers add cameras. Navimow, describing why it pairs the two, says that without vision "when the satellite signal is weak, the robotic mower might stop working or navigate outside the boundary."
Camera vision: no setup, with limits
A vision mower uses its cameras to tell grass from everything else. Eufy describes its E15 Gen 2 as "No Wires, No RTK, No Signal Issues: eufy TrueVision™ Technology with pure-vision cameras." Eufy rates it for a quarter acre and says to "ensure slopes are 18 degrees or less." Light is the limitation that comes up: Dreame, which sells LiDAR mowers, writes that "vision-only mowers tend to struggle in low light or in the shade." That is a maker describing rivals, so weigh it as such.
LiDAR: independent of satellites
LiDAR mowers scan the yard with a laser and need neither satellites nor a reference station to position themselves. Navimow says its i2 LiDAR "creates its own reliable navigation network without depending on satellites" and that "LiDAR maintains identical performance in total darkness." Mammotion rates LiDAR alone on its LUBA 3 for "precise coverage up to 0.37 acre, without RTK/NetRTK."
Dreame, which builds LiDAR mowers, is candid about the limits: "LiDAR struggles with very dark surfaces and dense fog or heavy rain. It also has higher upfront hardware costs than vision-only systems and can be confused by reflective surfaces like glass walls or polished metal."
When a wire still makes sense
A wire is not obsolete. Sunseeker, which sells wire-free mowers, concedes that "wired mowers deliver consistent edge cutting because they follow a physical guide" while wireless models "can sometimes create slightly less precise edges near complex borders." Husqvarna lets you mix the two: "Customers have the option to utilize some boundary wire in areas of heavy shade, but it is not required." Some models still use a wire only, such as Husqvarna's Automower 435X AWD and Worx's Landroid L, M and S, which ship with boundary wire in the box.
Which approach suits your yard
- Open lawn, few trees: satellite RTK, with a station or network corrections.
- Trees, tall walls or a house close to the lawn: LiDAR, or RTK with camera backup. Check the maker's sky-view requirement against your yard.
- Small, simple lawn: a camera-only mower may be enough.
- Heavy shade in one area: a model that accepts a wire for that part, as Husqvarna allows.
→ RTK robot mowers on Amazon · LiDAR robot mowers · wire-free robot mowers
For which models makers rate for 1 acre and more, see robot lawn mowers for 1 acre, 2 acres and large lawns.
A checklist before you buy
- Sky view: stand where the dock and any reference station would go and check the open sky against the maker's figure (90° to 135° in the examples above).
- Internet across the lawn: needed for cloud or network RTK. Wi-Fi at the house is not always coverage at the back fence.
- Light and night: if you want to mow at night, check what the maker says about low light.
- Surfaces: dark mulch, glass walls or polished metal can confuse LiDAR, according to Dreame.
- Fallback: can the model take a wire in a problem area?
FAQ
Do wire-free robot mowers work under trees?
RTK models can lose the satellite signal under dense trees; Navimow names "dense trees" among the obstructions that block it. LiDAR models do not rely on satellites, and many RTK models add cameras as backup.
Do wire-free robot mowers need internet?
Models that receive RTK corrections from the cloud or a network do. Models with a reference station in the yard, or LiDAR models, do not need it to position themselves, though their apps may use it.
How accurate is RTK on a robot mower?
Makers describe it as centimeter-level; Husqvarna's phrase is "centimeter-level accuracy in seconds." NOAA's survey guidance puts RTK accuracy "on the order of a centimeter" relative to the base station.
Sources
NOAA National Geodetic Survey: user guidelines for single base real-time GNSS positioning (2014). Husqvarna: EPOS and Automower 435X AWD. Segway Navimow: why the positioning signal can be weak, EFLS technology, i105 and i2 LiDAR. Mammotion: RTK signal on your lawn (2023) and LUBA 3 AWD. Lymow: One Plus specifications. Worx: Landroid Vision Cloud. Eufy: E15 Gen 2. Dreame: wire-free robot lawn mowers and LiDAR robot mowers. Sunseeker: wire-free robot lawn mowers explained.
Sources last checked November 13, 2026.
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