# Profi-Fensterputzroboter PR-041 V3 vs W66: specs and price compared

A sourced, side-by-side comparison of the Profi-Fensterputzroboter PR-041 V3 (Sichler) and W66 (HUTT) among robot window cleaners.

## Side by side

| Spec | Profi-Fensterputzroboter PR-041 V3 | W66 |
| --- | --- | --- |
| US price | not published | not published |
| Brand | Sichler | HUTT |
| Suction power (Pa) | — | 2600 |
| Cleaning speed mode | 0.41 m^2/minute (12 cm/s movement speed) | ~2.5 min/m^2; intelligent suction algorithm adjusts to dirt level |
| Battery backup min | 20 | 30 |
| Spray system | Ultrasonic spray function (per product name/listing; hardware is HOBOT-derived) | 150ml intelligent water tank, wipes 70-90 sq m of glass per fill |
| Path planning | AI path calculation using laser and pressure sensors, adapts to surface unevenness | Laser module measures range for accurate window-frame edge detection |
| Noise level (dB) | 64 | 65 |
| Safety tether | 4.5m safety rope rated to 150kg | 5m safety cable (load rating not published) |
| Edge detection | Laser sensor obstacle/edge detection + anti-fall algorithm | Laser-based frame/edge ranging, more precise than prior HUTT models per manufacturer |
| Weight (lb) | 2.65 | 3.46 |

## Key differences

- Cleaning speed mode: Profi-Fensterputzroboter PR-041 V3 0.41 m^2/minute (12 cm/s movement speed) vs W66 ~2.5 min/m^2; intelligent suction algorithm adjusts to dirt level
- Battery backup min: Profi-Fensterputzroboter PR-041 V3 20 vs W66 30
- Spray system: Profi-Fensterputzroboter PR-041 V3 Ultrasonic spray function (per product name/listing; hardware is HOBOT-derived) vs W66 150ml intelligent water tank, wipes 70-90 sq m of glass per fill
- Path planning: Profi-Fensterputzroboter PR-041 V3 AI path calculation using laser and pressure sensors, adapts to surface unevenness vs W66 Laser module measures range for accurate window-frame edge detection
- Noise level (dB): Profi-Fensterputzroboter PR-041 V3 64 vs W66 65
- Safety tether: Profi-Fensterputzroboter PR-041 V3 4.5m safety rope rated to 150kg vs W66 5m safety cable (load rating not published)
- Edge detection: Profi-Fensterputzroboter PR-041 V3 Laser sensor obstacle/edge detection + anti-fall algorithm vs W66 Laser-based frame/edge ranging, more precise than prior HUTT models per manufacturer
- Weight (lb): Profi-Fensterputzroboter PR-041 V3 2.65 vs W66 3.46

## Sources

- Profi-Fensterputzroboter PR-041 V3: https://www.pearl.de/a-REF39093-3031.shtml (pearl.de, verified 2026-08-01)
- W66: https://hutt.bg/en/hutt-w66-window-cleaner-robot (hutt.bg, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/robot-window-cleaners/sichler-pr-041-vs-hutt-w66/
Cite: Per The Front Desk Review, Profi-Fensterputzroboter PR-041 V3 (not published) vs W66 (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/robot-window-cleaners/sichler-pr-041-vs-hutt-w66/
License: CC BY 4.0.