Do any of these four robot mowers use a buried perimeter wire?

No. All four records describe wire-free boundaries. The Sunseeker S4 uses 3D LiDAR with AI vision, the Greenworks AiMowbot C20Z pairs RTK with an onboard camera, the Segway Navimow i215 LiDAR maps with LiDAR alone, and the Airseekers Tron combines camera-based VSLAM with RTK or network RTK. Each lawn is mapped in the app rather than laid out with wire.

Which of the four has the largest documented coverage area?

The Airseekers Tron's record lists the largest rated area, 25,800 sq ft (about 0.59 acre), though that is the lawn size it is rated for, not one charge: it mows roughly 840 to 1,170 sq m per charge. The Greenworks AiMowbot C20Z is rated for 21,800 sq ft, the Segway Navimow i215 LiDAR for 16,100 sq ft and the Sunseeker S4 for 10,900 sq ft.

Why doesn't this comparison include a five-year cost estimate?

The records do not hold enough running-cost data for any of the four. Only the Sunseeker S4's record prices a part, blades at $20 to $40. The others list blade schedules, such as two to three changes a season on the Greenworks AiMowbot C20Z, or parts in stock, as on the Airseekers Tron, without prices. All four launched in 2025 or 2026, so long-run repair costs are not yet on record.

Which of the four has no documented blade replacement cost?

Three of the four. Only the Sunseeker S4's record carries a blade price, $20 to $40. The Greenworks AiMowbot C20Z's record gives a schedule of two to three blade changes a season, the Segway Navimow i215 LiDAR's lists seasonal blade replacement, and the Airseekers Tron's says blades are sold in its US store, but none of the three records states a price.

Do any of these mowers operate at night?

The Segway Navimow i215 LiDAR's record documents night-capable operation, since its LiDAR does not depend on ambient light. The Sunseeker S4's record notes its LiDAR is unaffected by light, but night mowing is not verified on it. One review found the Airseekers Tron's camera navigation problematic in darkness once satellite positioning dropped out. Night operation is not verified on the Greenworks AiMowbot C20Z's record.

Comparisons · Robot Lawn Mowers4 robots · checked 2 Oct 2026

Head to head

Sunseeker S4 vs Greenworks C20Z vs Segway i215 vs Airseekers Tron

All four mow without a buried wire. This page asks how much lawn each one is rated for, and what that rating measures.

This page checks

Rated lawn sizeThe maker's area figure and what it counts
SlopeSteepest grade the maker states
RuntimeMinutes of mowing on one charge
Cellular linkWhether a 4G connection is built in

Sunseeker

IIIConditionalCapable

$1,799.99list

Where to buy

Amazon

Nov 2025Robot mower named CES Innovation Awards 2026 honoree

Greenworks

AiMowbot C20Z

IIIConditionalStrong

$1,299.99list

Where to buy

Amazon

US maker listing not confirmed; Canadian maker page shows it unavailable

Segway

Navimow i215 LiDAR

IIIConditionalCapable

$1,599list

Where to buy

Amazon

Jul 2026Reviews document missing cliff detection near edges

Airseekers

Tron

IIIConditionalCapable

$1,999list

Where to buy

Amazon

Jun 2025Robotic mower reaches commercial debut after year-long delay

Full specifications18 figures on record · 17 differ

Figure

AiMowbot C20Z

Navimow i215 LiDAR

Tron

List price

S4$1,799.99

AiMowbot C20Z$1,299.99

Navimow i215 LiDAR$1,599

Tron$1,999

Released

S4Mar 2026

AiMowbot C20ZMar 2026

Navimow i215 LiDARFeb 2026

TronJul 2025

Boundary

S4360-degree 3D LiDAR with Vision AI, no perimeter wire

AiMowbot C20ZRTK with vision, wire-free

Navimow i215 LiDARWire-free, LiDAR autonomous mapping

TronVSLAM with RTK or network RTK, no wire

Steepest slope

S442%

AiMowbot C20Z45%

Navimow i215 LiDAR45%

Tron65%

Rated lawn area

S410,900 sq ft

AiMowbot C20Z21,800 sq ft

Navimow i215 LiDAR16,100 sq ft

Tron25,800 sq ft

Cutting width

S47 in

AiMowbot C20Z8 in

Navimow i215 LiDAR7.1 in

Tron8.7 in

Cutting height

S41.6-3.2 in

AiMowbot C20Z0.8-3.5 in

Navimow i215 LiDAR0.8-2.8 in

Tron1.2-3.5 in

Drive

S4Rear-wheel drive

AiMowbot C20ZFour-wheel drive

Navimow i215 LiDARRear-wheel drive

TronDual rear-wheel drive, omnidirectional front wheel

Blades

S46 pivoting blades

AiMowbot C20ZNot on record

Navimow i215 LiDAR6-blade disc

TronFlowCut dual-layer mulching disc, 6 blades, lift fan

Weight

S426 lb

AiMowbot C20Z26.2 lb

Navimow i215 LiDAR32.4 lb

Tron43.7 lb

Runtime

S490 min

AiMowbot C20Z60 min

Navimow i215 LiDAR160 min

Tron180 min

Charge time

S480 min

AiMowbot C20Z50 min

Navimow i215 LiDAR130 min

Tron150 min

Battery capacity

S4Not on record

AiMowbot C20Z86 Wh

Navimow i215 LiDAR165 Wh

Tron378 Wh

Noise

S460 dB

AiMowbot C20Z54 dB

Navimow i215 LiDAR59 dB

Tron65 dB

Navigation

S43D LiDAR combined with AI Vision, no boundary wire

AiMowbot C20ZRTK GPS + on-board vision + 4WD drive.

Navimow i215 LiDARLiDAR scanning approximately 200,000 points per second; wire-free autonomous mapping; night-capable operation; no perimeter wire or separate antenna required

TronVSLAM with RTK or network RTK, no boundary wire

Connectivity

S4Wi-Fi

AiMowbot C20ZWi-Fi, Bluetooth, Cellular

Navimow i215 LiDARWi-Fi, Bluetooth

TronWi-Fi, Bluetooth, Cellular

Size

S416.6 × 25.1 × 10.8 in

AiMowbot C20Z19.9 × 25.7 × 12.3 in

Navimow i215 LiDAR17.5 × 25 × 11.3 in

Tron18.5 × 28.3 × 13.9 in

The same on all four

Battery type

S4Li-ion

AiMowbot C20ZLi-ion

Navimow i215 LiDARLi-ion

TronLi-ion

Add a robot124 robot lawn mowers on record + Add a robot124 robot lawn mowers on record

Some links earn Robovations a commission. Nothing on this page is ranked by it.

Coverage ceilings

How much lawn each rating really covers

Rated lawn size runs from 0.25 acre (Sunseeker) to 0.6 acre per 24 hours (Airseekers), and the Airseekers figure counts several charges. Airseekers also lists the steepest slope, 65% against 42% to 45% for the others, and the longest runtime, 180 minutes.

SunseekerS4

GreenworksAiMowbot C20Z

SegwayNavimow i215 LiDAR

AirseekersTron

1Rated lawn sizeSquares drawn to one scale, in acres

0.25acre

The maker's stated maximum yard size.

Sunseeker US store page

AiMowbot C20Z

0.5acre

Printed as max area on the maker's Canadian page.

Greenworks Canada product page

Navimow i215 LiDAR

0.37acre

The maker's listing gives 0.37 acre (1,500 m²).

Segway listing on Amazon US

Tron

0.6acre per 24 hours

A daily cutting area (2,400 m²) over several charges. One charge covers 0.21–0.29 acre.

Airseekers product page

2Steepest slopeDrawn at its true angle

42%

Printed as 42% (22°).

Sunseeker US store page

AiMowbot C20Z

45%

Printed as 24° (45% grade).

Greenworks Canada product page

Navimow i215 LiDAR

45%

Listing title says 45% slopes.

Segway listing on Amazon US

Tron

65%

Printed as 65% (about 33°).

Airseekers product page

3Runtime per chargeMinutes of mowing, one scale

90min

Printed as approximately 90 minutes. Charging takes 80 minutes.

Sunseeker US store page

AiMowbot C20Z

Not found

Canadian page lists charging time (about 50 minutes) but no runtime. The manual PDF could not be read.

Searched Greenworks Canada page and manual

Navimow i215 LiDAR

160min

Printed as up to 160 minutes. Charging takes 130 minutes.

Segway Navimow Ireland product page

Tron

180min

Printed as approximately 180 minutes per charge.

Airseekers product page

4Built-in 4GA cellular link beyond Wi-Fi

S4Wi-Fi only

The spec page says Wi-Fi connectivity only.

Sunseeker US product page

AiMowbot C20Z4G built in

Built-in SIM card, with Wi-Fi and Bluetooth. Plan terms not found.

Greenworks Canada product page

Navimow i215 LiDAR4G, 1 year

Listed with 4G, one year included.

Segway Navimow Ireland product page

Tron4G built in

Page lists Bluetooth, WiFi and 4G. It gives no plan terms.

Airseekers product page

Same on all four: no buried perimeter wire. Each maps the lawn with cameras and a laser or satellite fix, and each is set up and scheduled from an app.

The Airseekers Tron charges on its station against the garden shed; the lawn round it is cut only as far as one charge reached, and its gold flag stands out in the long grass beyond.

Your home

How each one fits a home like yours

Set the conditions that describe your home. Each robot answers from its own Fit Check; nothing is scored until you choose.

Fit check

Describe your home

Pick what applies. Each robot answers from its own record.

Yard size

Terrain

Boundary setup

Across what you setEach robot’s own Fit Check

S4Set a condition

AiMowbot C20ZSet a condition

Navimow i215 LiDARSet a condition

TronSet a condition

Yard sizeNot set

S4Not set

AiMowbot C20ZNot set

Navimow i215 LiDARNot set

TronNot set

TerrainNot set

S4Not set

AiMowbot C20ZNot set

Navimow i215 LiDARNot set

TronNot set

Boundary setupNot set

S4Not set

AiMowbot C20ZNot set

Navimow i215 LiDARNot set

TronNot set

Sources

Where every figure comes from

Sunseeker S4 · sunseekertech.com US spec page; Sunseeker US store product page (2 Oct 2026)
Greenworks AiMowbot C20Z · greenworkstools.ca product page (2 Oct 2026); US listing could not be opened
Segway Navimow i215 LiDAR · Segway listing on Amazon US; Navimow Ireland product page (2 Oct 2026)
Airseekers Tron · airseekers-robotics.com product page and coverage section (2 Oct 2026)

Every figure was read on 2 Oct 2026 from a maker page or maker listing that names the exact model. Where a figure could not be opened, the cell says Not found.

Questions

What readers ask

Do any of these four need a buried wire?

No. Each maker lists wire-free setup. Sunseeker and Segway pair LiDAR with vision, Greenworks pairs satellite positioning with vision, and Airseekers pairs vision with network satellite positioning.

Which one has the largest rated lawn?

Airseekers lists 0.6 acre (2,400 m²) per 24 hours, counting several charges. Per charge it lists 0.21 to 0.29 acre. Greenworks lists 0.5 acre, Segway 0.37 acre and Sunseeker 0.25 acre.

Do any of them come with a data plan?

Segway’s Ireland page lists 4G with one year included. Greenworks and Airseekers list a built-in 4G link but the pages opened give no plan terms. The Sunseeker S4 page lists Wi-Fi only.

Common questions

What readers ask about this comparison.

Next up

RTK-plus-camera or LiDAR: two Segway Navimow architectures

Read the comparison

Comparison ID: RV–CMP–9291 · Last reviewed Aug 26, 2026 · Based on owner reports, manufacturer documentation, and firmware release notes

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