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Robovations
Robovations™
Robot Autonomy, Classified
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Comparison · 2 robots

Greenworks Optimow 15 · Robomow RS630

All robot lawn mowers. Every measure below is plotted against the full class, so a difference can be read against how much the class itself varies.

  1. Greenworks Optimow 15
  2. Robomow RS630

Up to three

01 Classification

What each one does on its own.

The Autonomy Ladder is the same five rungs for every robot on the site. A rung describes the conditions a robot handles without you, not how good it is.

V
Generalized
Any task, any setting
IV
Environmental
Handles new obstacles without help
III
Conditional
Finishes familiar jobs on its own
II
Assisted
Runs preset routines, needs rescue
Greenworks Optimow 15Robomow RS630
I
Manual
One action, on command
02 Assessment

Where they actually differ.

The Robovations Score is nine inputs across three pillars, each weighted as shown and each scored so that more is better. A robot can lead on one and trail on another, which is the point of showing them apart. Cost of ownership and data handling are reported on each robot's own page and are never averaged into the score.

Capability

Task completion16% of score
Does it finish the job it is sold to do, unattended
  • Greenworks Optimow 1575
  • Robomow RS63072
18median 72 across 433 scored robots100
Coverage and navigation10% of score
Does it work the whole area, and hold that between runs
  • Greenworks Optimow 1555
  • Robomow RS63052
0median 70 across 421 scored robots100
Edge-case recovery10% of score
Does it recover from the failures its category presents
  • Greenworks Optimow 1565
  • Robomow RS63068
18median 52 across 320 scored robots100
Operating envelope4% of score
How far conditions can vary before performance drops
  • Greenworks Optimow 1576
  • Robomow RS63086
28median 68 across 397 scored robots100

Dependability

Field failure rate16% of score
Documented hardware failures per owner-year
  • Greenworks Optimow 1564
  • Robomow RS63085
6median 70 across 359 scored robots100
Software stability14% of score
Whether updates fix more than they break
  • Greenworks Optimow 1582
  • Robomow RS63074
15median 65 across 342 scored robots100
Support longevity10% of score
Committed parts, service and updates, with dates
  • Greenworks Optimow 1558
  • Robomow RS63048
0median 62 across 429 scored robots100

Ownership burden

Routine maintenance12% of score
Hands-on time it asks for in normal operation
  • Greenworks Optimow 1543
  • Robomow RS63043
22median 67 across 434 scored robots100
Consumables8% of score
Parts that must be bought to keep it working
  • Greenworks Optimow 1576
  • Robomow RS63071
8median 69 across 434 scored robots100
03 Measured against the class

How far apart is a long way?

A number only means something next to the spread it sits in. Each track below is the real range across every classified robot in the class, with the median marked.

Runtime106 with a published figure
  • Greenworks Optimow 1570 min
  • Robomow RS63090 min
30 minmedian 100 min240 min
Charge time107 with a published figure
  • Greenworks Optimow 1570 min
  • Robomow RS630120 min
30 minmedian 90 min300 min
Noise104 with a published figure
  • Greenworks Optimow 1550 dB
  • Robomow RS63065 dB
50 dBmedian 60 dB82 dB
Weight117 with a published figure
  • Greenworks Optimow 1524.3 lbs
  • Robomow RS63045 lbs
13 lbsmedian 29.8 lbs134 lbs
Height118 with a published figure
  • Greenworks Optimow 1510.2 in
  • Robomow RS63011.4 in
7.5 inmedian 11 in16.5 in

Not compared, because fewer than two of these robots carry a published figure: Price, Suction.

04 Ownership

What the numbers leave out.

The trade-off

What each design gives up to be good at what it is good at.

Greenworks Optimow 15

Wire installation is the price of entry: the Optimow 15 delivers genuine unsupervised mowing, but only after the owner commits several hours to perimeter-wire layout and staking.

Randomized cutting works, but systematic GPS-based mowing completes large areas faster and with more predictable pass distribution; the Optimow 15 trades path efficiency for a lower price tier.

Robomow RS630

Boundary wire is the RS630’s floor and ceiling: it makes coverage completely predictable, and it makes setup a 2-5 hour physical commitment that cannot be undone over an app update.

No live map in the app. Scheduling works; progress visibility does not.

Who each one is wrong for

Stated by the record itself. A robot being wrong for a household is a fact about fit, not a fault.

Greenworks Optimow 15
Yards exceeding 1,500 m² (0.37 acres)
The 1,500 m² coverage ceiling is a documented hard limit. Larger properties require a higher-capacity model; exceeding the rated area results in incomplete coverage cycles.
Owners who cannot or will not install perimeter wire
The Optimow 15 requires perimeter wire for all boundary definition. No GPS or camera-based wire-free operation is supported. Wire installation is mandatory, not optional.
Properties with dense obstacles or numerous internal garden beds
Randomized-pattern mowers lack systematic zone mapping. Dense obstacle fields or numerous internal garden beds require extensive guide-wire loops, adding installation complexity and wire-break risk.
Slopes exceeding 35% or areas with loose surface conditions
The 35% gradient rating is the published hard limit. Steeper sections or slopes with wet clay at the boundary are outside the documented operating envelope.
Households requiring Wi-Fi or local-network integration
Connectivity runs over GSM (cellular module), not home Wi-Fi. Smart-home integrations dependent on local Wi-Fi are not supported on this model.
Robomow RS630
Wire-free setup required; no GPS or vision boundary option
The RS630 has no GPS, RTK, or camera-based boundary system. Owners who cannot or will not install perimeter wire cannot use this mower.
Yards over 3/4 acre requiring single-pass coverage
Robomow rates the RS630 to 3/4 acre, about 32,670 sq ft. Larger properties require multiple charging cycles and extended scheduling; owner reports on very large lots describe insufficient daily coverage.
Complex multi-zone yards with many narrow passages
Wire routing through multiple zones and narrow corridors adds installation complexity and can cause signal issues. Robomow's installation documentation covers multi-zone setups, but fragmented layouts with narrow connecting corridors are the harder install and the more common source of trouble.
Owners expecting real-time GPS mapping in the companion app
The RS630 app shows scheduling and status but does not provide a live map or coverage visualization. Owners accustomed to GPS-based mapping products from competitors will find the app significantly less informative.

What stays your job

The upkeep ownership hands back to you, whatever the autonomy level says.

Greenworks Optimow 15
  • After every use: Visually inspect blade disc for damage or grass clogging.
  • Weekly: Clear accumulated clippings from the chassis underside and blade housing.
  • Monthly: Inspect boundary wire and pegs along the full perimeter; re-stake any lifted sections.
  • Every 3-6 months: Replace blade disc or individual blades; standard Greenworks Optimow replacement parts.
  • Seasonally: Clean charging contacts on dock and mower body; verify boundary wire continuity before mowing season.
  • Annually: Full perimeter wire inspection; replace degraded sections; charge battery to storage level before winter.
Robomow RS630
  • After every use: Visually inspect blade disc for debris or damage.
  • Monthly: Clean underside of cutting deck; remove packed grass clippings from blade housing.
  • Every 3-6 months: Replace blade disc (manufacturer-recommended interval; replacement discs run approximately $25-45 per set).
  • Seasonally: Inspect and test full perimeter wire circuit for breaks or signal degradation.
  • Seasonally: Clean base station charging contacts and rain sensor lens.
  • Annually: Check and tighten perimeter wire staples or rebury wire segments where ground shifting has exposed them.
  • As needed: Splice or replace perimeter wire sections damaged by edging tools or ground work.
05 Evidence

How much each of these is standing on.

Classifications rest on different depths of evidence. A pre-release assessment and a verified one are not the same kind of claim.

Evidence behind each classification
Robot Evidence status Sources reviewed Last assessed
Greenworks Optimow 15 Pending — Aug 2026
Robomow RS630 Provisional 4 Aug 2026

Robovations classifies robots; it does not rank them. Nothing on this page is a recommendation, and no manufacturer influences a classification or its placement here.