Roborock S Series

The Roborock S series is the classic flagship robot vacuum family, and its signature is the mop: VibraRise sonic vibration scrubs hard floors at up to 4,000 scrubs per minute and lifts up to 20 mm over carpet, instead of spinning pads. Five configurations sit here, the S7 Max Ultra ($1,299.99), the S8 Max Ultra ($1,599.99) and S8 MaxV Ultra (from $799.99) with the 8-in-1 RockDock Ultra, and the S8 Max Ultra ($799.99) and S8 MaxV Ultra ($1,099.99) with the plumbed Refill and Drainage System. Every one carries Roborock's 1-year limited manufacturer warranty.

Two decisions define an S series purchase: S8 Max Ultra or S8 MaxV Ultra (structured light or camera), and RockDock Ultra or Refill and Drainage (onboard tanks or plumbing). The S7 Max Ultra is the established third option. The $500 to $1,000 and $1,000 and up bands each hold S series models.

The two S8 models share the DuoRoller Riser brush (dual counter-rotating rubber rollers that lift automatically), VibraRise 3.0 mopping with dual vibration modules, a FlexiArm side brush and an Extra Edge mop that cleans to within 1.68 mm of baseboards, 140 F hot-water mop washing and 140 F heated drying, automatic detergent dosing from a 580 ml reservoir that lasts about 3 months, up to 7 weeks of debris per dust bag, and automatic tank refilling. The S8 Max Ultra runs 8,000 Pa with Reactive 3D structured-light obstacle avoidance. The S8 MaxV Ultra steps up to 10,000 Pa and adds ReactiveAI 2.0, an RGB camera plus 3D structured light that recognizes 73 object types, with pet recognition, pet photos, pet search, and the built-in Hello Rocky voice assistant.

The 8-in-1 RockDock Ultra holds its own 4 L clean water tank and a dirty tank, so it works anywhere there is an outlet. The Refill and Drainage System connects the dock to your water supply (0.1 to 0.4 MPa) and drain, with hookups recommended within 6 m of the dock, so it refills and empties itself; you never carry a tank again. The S8 Max Ultra Refill and Drainage and S8 MaxV Ultra Refill and Drainage are the plumbed versions of the same two robots, and the Saros 10 offers the same choice in the flagship line.

The S7 Max Ultra is the established S series workhorse: 5,500 Pa of HyperForce suction, VibraRise sonic mopping at 3,000 scrubs per minute with a 5 mm lift over carpet, PreciSense LiDAR with Reactive Tech obstacle avoidance that suggests no-go zones, up to 180 minutes per charge covering about 3,230 sq ft with dock refills, and the RockDock Ultra all-in-one station that washes, dries, refills, and empties for up to 7 weeks per 2.5 L bag.

Every S series robot runs a 5,200 mAh battery. The S7 Max Ultra is rated for up to 180 minutes per charge, and on larger floors the dock refills the robot's water tank mid-job. Maintenance is set by the dock: dust bags last up to 7 weeks, the S8 detergent reservoir about 3 months, and the dock washes and heat-dries the mop after every run, so your hands-on tasks are a bag swap, a detergent top-up, and, on RockDock Ultra models, filling the 4 L clean tank and emptying the dirty tank.

The S series fits homes with a lot of hard flooring that needs scrubbing rather than wiping: tile, sealed hardwood, and vinyl with dried spills and footprints. The VibraRise plate scrubs where spinning pads glide, the Extra Edge mop reaches baseboards, and the 20 mm lift on the S8 models keeps the wet pad off carpet. If you can run a water line to the dock, the Refill and Drainage versions remove the last manual task. The Roborock comparison page lines the S series up with the Qrevo and Saros models, and the robot vacuum buying guide explains when sonic mopping is the right call.