Overview

Roborock S9 MaxV Ultra represents the pinnacle of robot vacuum technology in 2025. At just 7.98cm tall - the slimmest in Roborock history - it slides under furniture that defeated previous generations while delivering improved cleaning performance and the most capable dock yet.

Released February 2025, the S9 MaxV Ultra commands a $1,799 premium for buyers who want the absolute best in automated home cleaning.

Features Deep-Dive

Industry-Slimmest Design

At 7.98cm (3.14 inches) tall, the S9 MaxV Ultra fits under furniture that blocked the S8 Pro Ultra's 9.65cm profile. This seemingly small change dramatically increases accessible floor space, particularly under low sofas and bed frames.

Enhanced OMNI Station

The dock now washes mops with 70°C hot water (up from 55°C), improving stain removal significantly. Auto water refill and empty remain standard. The 6,400mAh battery charges faster than the S8 series, reaching full in under 4 hours.

Diamond IoT Security

The S9 MaxV is the first Roborock to earn Diamond certification from UL Solutions for IoT security - the highest rating available. For privacy-conscious buyers, this matters when a camera-equipped robot roams your home.

Improved Edge Cleaning

New algorithms detect edges and corners more accurately, with the mopping system extending closer to walls. Side brush design changes reduce hair tangles.

Pricing Analysis

At $1,799, the S9 MaxV Ultra costs $200 more than the S8 Pro Ultra did at launch. The slimmer profile and improved dock features justify the premium for large homes. For apartments under 1,000 sq ft, it's overkill.

Who Is This For?

Roborock S9 MaxV Ultra works best for:

• Large home owners wanting complete floor coverage
• Low furniture households where height matters
• Clean freaks who want the hottest mop washing
• Privacy-conscious users who value security certification

Who Should NOT Use This

Roborock S9 MaxV Ultra might not be the right choice if:

• Budget matters: Excellent options exist for half the price
• Apartment living: Overkill for small spaces
• Dock space limited: The OMNI station is substantial
• Carpet-heavy home: Mopping features go underutilized

Bottom Line

Roborock S9 MaxV Ultra sets the standard for premium robot vacuums. The slimmer design solves the most common complaint about previous models, and hot water mop washing makes a real difference. Worth the premium for large homes.

FAQ

Is the height difference noticeable?

Very. The 1.67cm reduction means fitting under furniture that completely blocked the S8 Pro Ultra.

How loud is it compared to S8 Pro Ultra?

Similar noise levels. The slimmer design doesn't significantly impact motor acoustics.

Does hot water washing really matter?

Yes, particularly for kitchen and bathroom floors. Stains that needed manual intervention now clean automatically.

How long does the battery last?

Up to 180 minutes on quiet mode, enough for most 3,000+ sq ft homes in a single charge.