HOBOT
HOBOT 2S
- Autonomy
- IIAssisted
- Score
- 51/100Limited
- Readiness
- Ready Now
- Price
- $349list
ComparisonHOBOT 2S and Ecovacs Winbot 920
Ecovacs
Ecovacs Winbot 920
- Autonomy
- IIAssisted
- Score
- 54/100Limited
- Readiness
- Not assessed
- Price
- $349list
Up to three
Autonomy Ladder
- IManual
- IIAssisted
- IIIConditional
- IVEnvironmental
- VGeneralized
All robot window cleaners. Every figure below is placed against the whole class, so a gap can be read against how much the class itself varies.
Where each one suits you.
The conditions each robot was assessed against, side by side. Rows marked in gold are where these machines genuinely differ.
| Condition | HOBOT 2S | Ecovacs Winbot 920 |
|---|---|---|
| Window style | ||
| Standard residential | GoodInfrared edge detection works reliably on standard frame widths and glass profiles. | GoodOptimized for 6-12 sq ft panes on standard residential frames. Four-stage path covers standard sizes adequately. |
| Large panes (8 ft+)they differ | GoodDual-channel water dispensing handles wide panes without streaking; edge detection functions normally. | DependsPanes above 15 sq ft require multiple four-stage cycles or manual repositioning. Fixed path design does not optimize for pane size. |
| Specialty / texturedthey differ | PoorCurved mullions, recessed frames, or textured glass defeat edge detection; manufacturer specs exclude specialty surfaces. | DependsCurved or heavily subdivided glass confuses the fixed path logic. Manual repositioning frequent; best suited to flat, uniform windows. |
| Frame style | ||
| Frameless / minimalthey differ | GoodFrameless windows provide consistent surface; edge detection uses glass perimeter for positioning. | DependsFixed path logic struggles without visible boundaries. Frameless glass may cause robot drift or repetitive repositioning attempts. |
| Standard mullions | GoodStandard framed windows are the primary design case; edge detection calibrated for frame-edge transitions. | GoodStandard wood, aluminum, or vinyl frames provide visual cues for path logic. Four-stage routine executes predictably on framed windows. |
| Heavy bezels | DependsThick or recessed frames may confuse edge detection; manual override required more frequently. | DependsMetal frames with complex joinery trap spray moisture in recesses. Weekly inspection needed to prevent water pooling and intake clogging. |
| Building height | ||
| Single-story | GoodGround-level placement eliminates fall concern and simplifies manual repositioning. | GoodGround-level and platform windows are primary design target. Simple four-stage path and safety rope handling straightforward. |
| 2 – 3 stories | GoodTwo to three-story homes manageable with portable ladder or interior placement; safety rope secures unit if suction fails. | GoodSecond-story windows (15-20 ft) manageable with external rope anchor and GFCI-protected power outlet. |
| 4+ storiesthey differ | PoorMulti-story repositioning becomes repetitive hauling; exterior access points on tall buildings create safety and practical burden. | DependsHeights above 20 feet approach motor power limits and cable routing challenges. Secondary tether strongly recommended; newer models handle high-altitude better. |
| Power preference | ||
| Corded OK | GoodHOBOT 2S is cordless. No corded operation available. | Good20-meter power cable with outdoor connector. Requires outlet within cable range; extension use discouraged by manufacturer. |
| Cordless preferredthey differ | GoodCordless operation with USB rechargeable batteries; runtime is 20-30 minutes depending on usage. | PoorWinbot 920 is corded only; no battery option. Newer W1 Pro offers cordless operation if needed. |
| No preference | GoodCordless batteries sufficient for typical window-cleaning sessions; no corded option necessary. | GoodCorded operation is standard; cordless variant not available for this model. |
A robot being poor for a condition is a fact about fit, not a fault. “Depends” means the record names a limit worth reading, not that the answer is unknown.
What the score is built from.
Nine inputs across three pillars, each weighted as shown and each scored so more is better. A robot can lead on one and trail on another, which is the point of showing them apart.
Capability
Task completion16% of score
Does it finish the job it is sold to do, unattended
6060
- HOBOT 2S60
- Ecovacs Winbot 92060
18median 72 across 444 scored robots100
Coverage and navigation10% of score
Does it work the whole area, and hold that between runs
4572
- HOBOT 2S45
- Ecovacs Winbot 92072
0median 72 across 432 scored robots100
Edge-case recovery10% of score
Does it recover from the failures its category presents
3065
- HOBOT 2S30
- Ecovacs Winbot 92065
18median 53 across 329 scored robots100
Operating envelope4% of score
How far conditions can vary before performance drops
5560
- HOBOT 2S55
- Ecovacs Winbot 92060
28median 68 across 408 scored robots100
Dependability
Field failure rate16% of score
Documented hardware failures per owner-year
5656
- HOBOT 2S56
- Ecovacs Winbot 92056
6median 70 across 365 scored robots100
Software stability14% of score
Whether updates fix more than they break
6565
- HOBOT 2S65
- Ecovacs Winbot 92065
15median 65 across 346 scored robots100
Support longevity10% of score
Committed parts, service and updates, with dates
4830
- HOBOT 2S48
- Ecovacs Winbot 92030
0median 62 across 440 scored robots100
Ownership burden
Routine maintenance12% of score
Hands-on time it asks for in normal operation
2825
- HOBOT 2S28
- Ecovacs Winbot 92025
22median 68 across 445 scored robots100
Consumables8% of score
Parts that must be bought to keep it working
6657
- HOBOT 2S66
- Ecovacs Winbot 92057
8median 69 across 445 scored robots100
How far apart is a long way?
A number only means something next to the spread it sits in. Each track is the real range across every classified robot in the class, with the median marked.
Price21 with a published figure
$349$349
- HOBOT 2S$349
- Ecovacs Winbot 920$349
$150median $349$850
Noise23 with a published figure
64 dB70 dB
- HOBOT 2S64 dB
- Ecovacs Winbot 92070 dB
62 dBmedian 68 dB75 dB
Weight27 with a published figure
2.9 lbs3.7 lbs
- HOBOT 2S2.9 lbs
- Ecovacs Winbot 9203.7 lbs
2 lbsmedian 3.4 lbs4.8 lbs
Height25 with a published figure
3.4 in3.1 in
- HOBOT 2S3.4 in
- Ecovacs Winbot 9203.1 in
2.2 inmedian 3.1 in9.4 in
Not compared, because fewer than two of these robots carry a published figure: Suction, Runtime, Charge time.
What the numbers leave out.
Written on each record, and the only thing here every robot on the site carries.
The trade-off
What each design gives up to be good at what it is good at.
HOBOT 2S
You gain stable autonomous cleaning of a pane once positioned, but you lose multi-window autonomy. Manual placement is the structural constraint.
Dual ultrasonic spray nozzles wet the pane evenly, but they draw from one tank, so a large job means taking the unit off the glass to refill.
You are freed from the ladder, but the machine is never untethered: a 4.5 m safety rope anchored to a fixed object indoors and a permanently attached 5 m mains cord are both part of every session.
Ecovacs Winbot 920
Simple to operate, fixed in what it does: the pad sequence and spray volume are the same on lightly dusted glass as on mineral-etched glass, so heavy soiling takes a second run rather than a longer first one.
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.
HOBOT 2S
- Hands-off scheduling automation seekers
- The app and the bundled remote control a session in progress, but every pane still needs the unit lifted, placed and started by hand. Owner involvement is per window, not per house.
- Multi-story buildings with distributed windows
- Frequent repositioning between stories becomes repetitive labor, and each new position means re-anchoring the rope indoors and finding a socket within 5 m.
- Owners with irregular or architectural detailing
- The Edge-Leakage Sensor works by detecting the air leak when the pad breaks its seal at an edge, so it reads frameless glass as well as framed. Deep recesses and heavy architectural detailing still limit where the unit can be placed and raise how often it needs repositioning by hand.
- Properties with limited nearby water supply
- The unit carries a single water tank module refilled by hand, which on a large job means taking it off the glass and walking back to a tap. HOBOT publishes no per-fill coverage figure.
Ecovacs Winbot 920
- Windows out of reach of an indoor socket
- Ecovacs requires the plug and power adapter to be used indoors, and the power cable is short, on the order of four meters per Ecovacs distributor listings. That puts the working envelope at about one room's reach of an inside outlet. There is no configuration of this robot that runs from an outdoor socket.
- Frameless glazing, or exterior work in wind or at elevation
- Ecovacs sets three hard limits: a window frame of at least 5 mm, which effectively rules out frameless glass on this generation; no operation in whole gale storms or force-10 winds; and no use above 2,000 m (6,162 ft) of altitude, where thinner air weakens the suction seal.
- Heavily soiled or mineral-etched glass
- Spray volume is fixed rather than varied by soil level, so etched or heavily deposited glass needs pre-soaking or a repeat run rather than a longer single pass.
- Owners wanting cordless operation
- The 920 is mains-fed with the adapter indoors, so the cord has to be routed to each window. App control is not what separates it from newer models: the 920 is Ecovacs' first app-controlled window cleaner and pairs with ECOVACS HOME over Bluetooth. What later models add is running without a cord.
What stays your job
The upkeep ownership hands back to you, whatever the autonomy level says.
HOBOT 2S
- Before every use: Run the safety rope through your hands along its full length and check both end fittings; replace it if any strands are cut, frayed or abraded. Confirm the indoor anchor is a fixed object that will not move under load.
- Before every use: Inspect the permanently attached power cord for nicks, crushing or exposed conductors along its length.
- After every use: Remove and wring the microfiber pads, then dry them fully before storage.
- Weekly (if heavy use): Inspect vacuum motor intake for dust clogs with a soft brush.
- Every 2-4 weeks: Check the rubber sealing ring for hair or debris; clean with a damp cloth.
- Monthly: Run a vinegar solution through the ultrasonic spray nozzles to clear mineral buildup.
- By condition: Replace microfiber pads when matted or thinning (approximately $20-30 per pair). The water tank is a single module, replaced with one screw.
Ecovacs Winbot 920
- Weekly: Rinse cleaning pads and spray jets under tap water; inspect pads for fraying or cover damage.
- Bi-weekly: Clean motor intake ports with compressed air or soft brush; test suction motor sound for consistency.
- Monthly: Deep-clean spray jets by soaking in distilled vinegar if mineral spray residue visible; inspect power cable for insulation damage.
- Every 4-5 months: Replace cleaning pads (~$18-22 per pair); check power connector for corrosion or looseness.
- Bi-monthly: Replace motor intake filter (~$8-10); monitor suction grip as replacement interval; accelerated wear indicates intake blockage.
- As needed: Replace vacuum motor assembly if suction drops below specification (~$70, typical at 4-5 year mark with weekly use).
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.
| Robot | Evidence status | Sources reviewed | Last assessed |
|---|---|---|---|
| HOBOT 2S | Provisional | 4 | Sep 2026 |
| Ecovacs Winbot 920 | Discontinued | 5 | Oct 2026 |
Evidence status counts the sources behind a classification, not their kind. A high count can be maker documentation and price coverage, so read it as how much was reviewed rather than as independent testing. How we weigh evidence.
Keep going.
The full recordHOBOT 2SSpecifications, evidence, the Fit Check in full, and every tracked change.
The full recordEcovacs Winbot 920Specifications, evidence, the Fit Check in full, and every tracked change.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.
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