Can a window robot clean the outside of windows?
Short answer
Ecovacs says both Winbots we track can, because their stations carry a battery and a combined power and safety cord, so the robot can work on exterior glass away from an outlet. You still have to place it on the outside pane yourself, so it suits windows you can open or reach.
Which robots can do it?
- Ecovacs Winbot W2 Pro OmniYes
Ecovacs says the W2 Pro Omni suits indoor windows through exterior glass, including floor-to-ceiling, small, frameless and tilting windows, with a portable battery station.
Good to know: Maker's description; TechRadar's first look covered windows, mirrors and shower doors, not outside panes. See also: can a window robot fall off the glass?
- Ecovacs Winbot W3 OmniYes
Ecovacs says the W3 Omni's battery lets it clean from indoor windows to exterior glass, plugged in or on battery, on glass at least 3 mm thick.
Good to know: Maker's description and spec. CyberShack's review found it suits large square panes best.
Why it matters
The outside of the windows is the dirty side and the hardest to reach, especially upstairs.
Not proven yet
How either robot copes with outdoor grime, wind or rain, and whether it handles your window type; we haven't read a test of either Winbot on exterior glass, and Ecovacs doesn't say anything about double glazing.
How we know (4 sources)
Hands-on first look at the Ecovacs Winbot W2 Pro Omni on windows, mirrors and shower doors. It holds on by suction, with a safety tether to the power pack in case it lets go.
Read the sourceWeeks-long review of the Ecovacs Winbot W3 Omni (AU$1,299), 4.5/5: cleaned better than by hand, with a dock that washes its pads and layered safety (strong suction, about 30 minutes on backup power, a 100 kg safety cord). Leaves a faint pad outline to wipe off, once got stuck on a roller blind, and suits large square panes best.
Read the sourceGlobal product page for the Winbot W2 Pro Omni, read Oct 23, 2026: a portable station with a built-in battery, an automatic cable coiler, controls and storage; a two-in-one cable that combines safety and power cords; three-nozzle wide-angle spray with a wet mop; and a 12-stage protection system. Reopened Oct 26, 2026: Ecovacs says it suits 'indoor windows to an exterior glass surface', including floor-to-ceiling, small, frameless and tilting windows, with a 1 m safety rope at the bottom of the station; stays attached for over 30 minutes at low battery.
Read the sourceUS product page for the Winbot W3 Omni, read Oct 23, 2026: a station with Vortex Wash that washes the wiping pads automatically, three-nozzle wide-angle spray with a wet pad, TruEdge edge cleaning, a two-in-one cable that combines safety and power cords, and a 12-level protection system. Reopened Oct 26, 2026: the battery lets it clean 'from indoor windows to an exterior glass surface', plugged in or on battery; spec sheet lists a 3 mm minimum glass thickness and frame-distance detection; stays attached for over 30 minutes at low battery. $699.99.
Read the source
Status timeline
No status has changed since we started tracking. Every entry is dated and backed by the sources on this page.
- First recorded: In storesEcovacs Winbot W3 Omni
Ecovacs says the W3 Omni's battery lets it clean from indoor windows to exterior glass, plugged in or on battery, on glass at least 3 mm thick.
- First recorded: In storesEcovacs Winbot W2 Pro Omni
Ecovacs says the W2 Pro Omni suits indoor windows through exterior glass, including floor-to-ceiling, small, frameless and tilting windows, with a portable battery station.