Kärcher KIRA B 50 · specs, operator review and alternatives (2026)
The Kärcher KIRA B 50 is a premium autonomous floor scrubber launched in 2022, positioned in the mid-range for large floor areas. It scrubs a 550 mm path, carries 55 L of clean water, is rated at 2,365 m²/h and stands out for a complete autonomy ecosystem (water, charging and rinsing dock) and an IEC 63327 public-area certification issued by DEKRA. It navigates with 3 LiDARs, 4 3D sensors and 11 ultrasonic sensors, fits through a 900 mm corridor and weighs 228 kg. Price and availability on request.
At a glance
Technical specifications
Reading by environment
Floors and soiling
A scrubber-dryer for hard floors: its core target is adherent, greasy and wet soiling, right up to the edges thanks to the side brush and pre-sweep. No carpet. Bulky solid waste must be pre-swept despite the built-in pre-sweep, which is sized for fine debris. This is a deep-scrubbing machine for clear hard floors, not a high-volume sweeper.
What the manufacturer does not say
The certification is real and the body is named. IEC 63327 by DEKRA, with cybersecurity certifications: a solid differentiator against competitors who claim conformity without naming a certification body. A genuine argument in public-access buildings.
Watch the stated brush pressure. Kärcher publishes 80 g/cm², a surface pressure, with no equivalent in kilograms. Do not compare it with the brush pressures in kg quoted for other machines.
No published customer reference. Mentions of sensor suppliers or supervision tools are not customers. Kärcher publishes none for this model.
Total cost is opaque. The dock is a paid option, and the complete ecosystem costs more than the machine alone. Cost structure: machine + dock (water, charging, rinsing) + consumables + 4G connectivity.
Buying or outsourcing
If you buy (capex), the IEC 63327 certification by DEKRA and the cybersecurity side make it a solid choice for public-access buildings, but the brush pressure is given as a surface pressure (80 g/cm²), which cannot be compared with the pressures in kilograms quoted for other machines. If you outsource (opex), the contractor carries those technical trade-offs and continuity. See our robot range and the demonstration, or our robotic cleaning service.
Strengths and limitations
Strengths
- IEC 63327 (DEKRA) and cybersecurity certified: usable in public-access buildings, rare at this level of evidence.
- Complete autonomy ecosystem (water, charging and rinsing dock) and built-in 4G.
- Rich navigation suite (3 LiDARs, 4 3D sensors, 11 ultrasonic sensors).
Limitations
- 550 mm brush and 900 mm passage width: clear aisles required.
- Dock is a paid option, total cost opaque.
- Long charge (5.2 h), no carpet.
Alternatives to the Kärcher KIRA B 50
The KIRA B 50 is a pure 55 cm autonomous floor scrubber, IEC 63327 certified, with a charging, water and rinsing dock. The alternatives fall into two families: autonomous floor scrubbers of the same size, which scrub and dry as it does, and 50 to 55 cm multifunction robots, which add sweeping and vacuuming in the same pass for sales floors and lobbies. The table compares the models on measurable criteria; prices are not published and are on request across the whole market.
| Model and positioning | Width (mm) | Productivity (m²/h) | Runtime (h) | Docking station |
|---|---|---|---|---|
| PUDU BG1 55 cm multifunction: sweeps and scrubs in a single pass, extending brush for edges, 24/7 station. The model we deploy in large retail stores. | 550 | 2000 | 7.5 | Yes |
| Gausium Scrubber 50 Pro 46 cm autonomous floor scrubber with full station, 3 to 8 h. | 460 | 1987 | 3-8 | Yes |
| Nilfisk Liberty SC50 50 cm autonomous floor scrubber, manual and autonomous modes. | 510 | n/p | n/p | No |
| LionsBot R3 Scrub Compact 37 cm, dual-mode or edge-to-edge, station. | 370 | 1200-1800 | 3 | Yes |
| Tennant T380AMR Autonomous ride-on, two modes, large floor areas. | 500 | 3106 | 4 | No |
| Hako Scrubmaster B75 i 65 cm autonomous floor scrubber, station, lobbies and warehouses. | 650 | 1980-2340 | 2-3 | Yes |
To place the KIRA B 50 within the wider market, our guide to commercial floor cleaning robots compares 106 models, and our KIRA B 50 or BR 200 comparison covers the choice within the Kärcher range. The right model is chosen on your floors: the free demonstration settles it.
Within the Kärcher range and beyond.
- Within the Kärcher range: the KIRA B 200 (200 L, smooth or textured floors), the next size up.
- Against autonomous floor scrubbers: the autonomous Tennant models and the Gausium Scrubber range for similar needs.
Comparison with a Pudu BG1: see our dedicated comparison. To put figures on it: How much does it cost?, Rental or purchase? or a demonstration.
Sources
Consulted on 16/07/2026: Kärcher product page for the KIRA B 50; internal robot database (v39). Values marked "n/p" not published. No price displayed: on request.
Frequently asked questions
Is the KIRA B 50 certified for public-access buildings?
What floor area is it designed for?
Does it fit through narrow aisles?
How much does it cost?
Interested in the Kärcher KIRA B 50, or in an alternative?
Ask us: we will tell you plainly whether this model suits your floors, and what we would do in your place. Reply within one working day.