# WIN660 vs Profi-Fensterputzroboter PR-041 V3: specs and price compared

A sourced, side-by-side comparison of the WIN660 (Alfawise) and Profi-Fensterputzroboter PR-041 V3 (Sichler) among robot window cleaners.

## Side by side

| Spec | WIN660 | Profi-Fensterputzroboter PR-041 V3 |
| --- | --- | --- |
| US price | $275.84 | not published |
| Brand | Alfawise | Sichler |
| Released | 2018 | — |
| Suction power (Pa) | 2800 | — |
| Cleaning speed mode | ~2.5 min/m^2 | 0.41 m^2/minute (12 cm/s movement speed) |
| Battery backup min | 25 | 20 |
| Spray system | — | Ultrasonic spray function (per product name/listing; hardware is HOBOT-derived) |
| Path planning | 4 edge-sensing sensors for frame/frameless windows; Z and N cleaning patterns | AI path calculation using laser and pressure sensors, adapts to surface unevenness |
| Noise level (dB) | 65 | 64 |
| Safety tether | 150kgf-rated safety rope | 4.5m safety rope rated to 150kg |
| Edge detection | 4 edge-sensing sensors, works on frameless windows | Laser sensor obstacle/edge detection + anti-fall algorithm |
| Weight (lb) | — | 2.65 |

## Key differences

- Cleaning speed mode: WIN660 ~2.5 min/m^2 vs Profi-Fensterputzroboter PR-041 V3 0.41 m^2/minute (12 cm/s movement speed)
- Battery backup min: WIN660 25 vs Profi-Fensterputzroboter PR-041 V3 20
- Path planning: WIN660 4 edge-sensing sensors for frame/frameless windows; Z and N cleaning patterns vs Profi-Fensterputzroboter PR-041 V3 AI path calculation using laser and pressure sensors, adapts to surface unevenness
- Noise level (dB): WIN660 65 vs Profi-Fensterputzroboter PR-041 V3 64
- Safety tether: WIN660 150kgf-rated safety rope vs Profi-Fensterputzroboter PR-041 V3 4.5m safety rope rated to 150kg
- Edge detection: WIN660 4 edge-sensing sensors, works on frameless windows vs Profi-Fensterputzroboter PR-041 V3 Laser sensor obstacle/edge detection + anti-fall algorithm

## Sources

- WIN660: https://www.dresslily.com/alfawise-win660-robotic-window-cleaner-product2492527.html (dresslily.com, verified 2026-08-01)
- Profi-Fensterputzroboter PR-041 V3: https://www.pearl.de/a-REF39093-3031.shtml (pearl.de, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/robot-window-cleaners/alfawise-win660-vs-sichler-pr-041/
Cite: Per The Front Desk Review, WIN660 ($275.84) vs Profi-Fensterputzroboter PR-041 V3 (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/robot-window-cleaners/alfawise-win660-vs-sichler-pr-041/
License: CC BY 4.0.