The Kärcher KIRA B 50 is an autonomous floor scrubber with a 29.5 inch working width, route teaching on a touch display and an optional dock that refills, drains and charges it. It suits medium to large hard floor sites that want a big floor care brand behind their robot, but there is no public price, so you will need a quote to judge whether it is worth it.
What the Kärcher KIRA B 50 is
The KIRA B 50 is a robotic scrubber dryer from Kärcher, the German cleaning equipment maker. It is roughly the size of a walk behind scrubber: 43.3 by 29.5 by 47.2 inches, and 496 pounds without accessories RobotLAB KIRA B 50 ↗.
It cleans with a cylindrical brush head plus a side brush, spinning at 1,200 rpm, across a 29.5 inch working width RobotLAB KIRA B 50 ↗. You teach it routes on its touch display, and it then runs them on a schedule set with a calendar function RobotLAB KIRA B 50 ↗. It detects obstacles and drops, and RobotLAB, the US integrator that lists it, says it is certified for public access RobotLAB KIRA B 50 ↗.
We have not run one ourselves. Hands on testing is in progress, and this review is based on the published specs from RobotLAB.
What it does well
The optional docking station is the standout. It refills clean water, drains dirty water and charges the robot on its own RobotLAB KIRA B 50 ↗. On most scrubbing robots, a person has to fill and empty tanks every day, so a dock that does this cuts daily handling a lot.
It is easy to set up routes. Staff teach a route through the touch display, and the robot repeats it RobotLAB KIRA B 50 ↗. That is the same teach and repeat idea Tennant uses on its T380AMR Tennant T380AMR ↗.
Reporting is built in. The KIRA Robots app and autonomous reporting give what RobotLAB calls audit ready proof of clean, which is handy for store operations that need to show cleaning was done RobotLAB KIRA B 50 ↗.
It also fits into larger automation setups. It supports the VDA 5050 communication interface, an industry standard for coordinating fleets of mobile robots RobotLAB KIRA B 50 ↗. And it comes from Kärcher, a long established floor care brand, which matters for parts and service over the years you will own it.
Where it falls short
There is no public price. RobotLAB says to contact it for details, and pricing, financing terms and lead time all require a quote RobotLAB KIRA B 50 ↗. That makes it hard to compare against robots with list prices.
Runtime is modest. It runs about 3.5 hours on its two 24 volt, 160 Ah batteries and takes up to 5.2 hours to charge RobotLAB KIRA B 50 ↗. Compare that with up to 8 hours for Pudu's CC1 Pro RobotLAB CC1 Pro ↗.
Several useful specs are missing from the listing. RobotLAB does not give tank sizes, an area coverage rate or warranty terms RobotLAB KIRA B 50 ↗. Ask for all three in your quote.
It is a scrubber for hard floors. If your site is mostly carpet, a vacuum robot is the better tool. It is also heavy and fairly loud at 69 dB(A), and climbs slopes only up to 6 percent RobotLAB KIRA B 50 ↗.
Pricing and plans
Retail price: not published. RobotLAB lists the purchase price as contact for details RobotLAB KIRA B 50 ↗.
Ways to pay: purchase, lease or robots as a service (RaaS), all by quote RobotLAB KIRA B 50 ↗.
What's included: the scrubber, the cylindrical brush head with side brush, two batteries, a charger, the touch display, and the manual and safety documents RobotLAB KIRA B 50 ↗. The docking station is optional, so ask whether it is in your quote RobotLAB KIRA B 50 ↗.
Where sold: in the US through integrators such as RobotLAB, which handles quotes and financing RobotLAB KIRA B 50 ↗.
Warranty and consumables: not stated on the listing RobotLAB KIRA B 50 ↗. Brushes, squeegees and cleaning chemicals are ongoing costs with any scrubber, so ask what is covered and what a service plan costs.
Who should (and shouldn't) use it
- Good fit: retail stores, warehouses and public buildings with medium to large hard floors.
- Good fit: sites that want the dock to handle water and charging so staff touch the robot less.
- Good fit: operators who need cleaning reports for audits.
- Skip it if: you need a published price or a quick online purchase.
- Skip it if: your floors are mostly carpet or your aisles are tight.
- Skip it if: you need long runs on one charge without the dock.
Alternatives worth a look
- Pudu CC1 Pro: sweeps, scrubs, vacuums and dust mops, runs up to 8 hours, and lists at $24,000 or $669 a month RobotLAB CC1 Pro ↗.
- Tennant T380AMR: robotic scrubber with 20 gallon tanks, a 20 inch path and up to 5 hours on lithium batteries, sold with leasing, financing or rental Tennant T380AMR ↗.
- Gausium Scrubber 50 Pro: a bigger scrubber with water recycling, listed from $53,600 to buy or $979 a month on a 36 month plan RobotLAB Scrubber 50 ↗ RobotLAB cleaning list ↗.
- Avidbots Neo: a large scrubber that Avidbots says covers up to 42,000 square feet per hour, priced by demo Avidbots Neo ↗.
Where it appears
ComparedThe Best Commercial Cleaning RobotWhat’s good
- Trusted cleaning brand
- Optional self service dock
- Reporting app
What to know
- No public price
- Not for carpet
Key features
- Route teaching on touch display
- Scheduled cleaning
- 29.5 inch working width
- About 3.5 hour runtime
- Optional auto fill, drain and charge dock
Questions people ask
How much does the Kärcher KIRA B 50 cost?
Kärcher's US reseller RobotLAB does not publish a price. Purchase, lease and RaaS pricing are all by quote RobotLAB KIRA B 50 ↗.
How long does the KIRA B 50 run on a charge?
About 3.5 hours, with a charging time of up to 5.2 hours RobotLAB KIRA B 50 ↗.
Does the KIRA B 50 fill and empty its own tanks?
Yes, with the optional docking station, which handles automatic refill, drain and charging RobotLAB KIRA B 50 ↗.
How do you program the KIRA B 50?
You teach routes on its touch display and schedule cleans with a calendar function. It also works with the KIRA Robots app RobotLAB KIRA B 50 ↗.
Where this comes from
Checked Oct 9, 2026. Vendor pages describe their own products; independent sources add outside views. Hands on testing is in progress.
01