Alfawise
Alfawise WIN660
$275.84
Released 2018
Best Robot Window Cleaners · head-to-head
Alfawise WIN660 vs Sichler Profi-Fensterputzroboter PR-041 V3
A sourced, side-by-side comparison. Alfawise WIN660 is cheaper at $275.84. Every spec and price links to its source.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec |  Alfawise WIN660 |  Sichler Profi-Fensterputzroboter PR-041 V3 |
|---|---|---|
| US price | $275.84 | — |
| 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 |
Sources — Alfawise WIN660: dresslily.com (verified 2026-11-04). Sichler Profi-Fensterputzroboter PR-041 V3: pearl.de (verified 2026-08-01).
What's the difference between the Alfawise WIN660 and Sichler Profi-Fensterputzroboter PR-041 V3?
Where the two actually differ on the specs we track (6 of 9). Matching specs are omitted.
- Cleaning speed mode: Alfawise WIN660 ~2.5 min/m^2 vs Sichler Profi-Fensterputzroboter PR-041 V3 0.41 m^2/minute (12 cm/s movement speed)
- Battery backup (min): Alfawise WIN660 25 vs Sichler Profi-Fensterputzroboter PR-041 V3 20
- Path planning: Alfawise WIN660 4 edge-sensing sensors for frame/frameless windows; Z and N cleaning patterns vs Sichler Profi-Fensterputzroboter PR-041 V3 AI path calculation using laser and pressure sensors, adapts to surface unevenness
- Noise level (dB): Alfawise WIN660 65 vs Sichler Profi-Fensterputzroboter PR-041 V3 64
- Safety tether: Alfawise WIN660 150kgf-rated safety rope vs Sichler Profi-Fensterputzroboter PR-041 V3 4.5m safety rope rated to 150kg
- Edge detection: Alfawise WIN660 4 edge-sensing sensors, works on frameless windows vs Sichler Profi-Fensterputzroboter PR-041 V3 Laser sensor obstacle/edge detection + anti-fall algorithm