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Robot Vacuums · Head to head

Roborock Saros 20 vs Shark PowerDetect ThermaCharged RV2920XE

Full Robot Vacuums comparison in 2026

Updated October 2026
Data from Amazon and official Roborock and Shark sites.
2026 verdict
With 36,000 Pa suction, Matter and a longer battery, the Roborock Saros 20 still finishes behind the Shark PowerDetect ThermaCharged RV2920XE.
The Shark takes this robot vacuum comparison as the better reviewed, the more affordable, and the one with a two-year warranty and a larger 379 ml onboard bin. The Roborock Saros 20 keeps 200 minutes against 180, 5 GHz Wi-Fi, a child lock, and Apple Home, SmartThings and Matter. Shark suction is not documented, so airflow is not why it wins. Buy the Shark for value and the warranty. Buy the Roborock for suction and Matter.
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FeatureRoborock Saros 20Shark PowerDetect ThermaCharged RV2920XEWinner
Price$1479.99$1099.95Shark PowerDetect ThermaCharged RV2920XE
Rating4.24.3Shark PowerDetect ThermaCharged RV2920XE
Warranty1 year2 yearsShark PowerDetect ThermaCharged RV2920XE
Battery Life200 minutes180 minutesRoborock Saros 20
Connectivity2.4 GHz WiFi, 5 GHz WiFi2.4 GHz WiFiRoborock Saros 20
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Home AssistantRoborock Saros 20
Onboard Dustbin Capacity259ml379mlShark PowerDetect ThermaCharged RV2920XE
Auto RechargeYESYESTie
Navigation TypeLaser (LiDAR)Laser (LiDAR)Tie
Obstacle DetectionYESYESTie
Cliff DetectionYESYESTie
Multi-Room MappingYESYESTie

What the differences mean

Warranty and the onboard bin

The Shark PowerDetect ThermaCharged RV2920XE carries a two-year warranty and a 379 ml onboard bin. The Roborock Saros 20 carries a one-year warranty and a 259 ml bin, with a documented 2.5L dock bag. Shark's dock bag size is not documented. Both still self-empty, so the bin size is what the robot holds between trips to the base.

Suction, left unpublished on one side

The Roborock Saros 20 publishes 36,000 Pa. The Shark PowerDetect ThermaCharged RV2920XE does not publish a suction figure, so this comparison cannot call either one ahead on airflow. What is known is the runtime: 200 minutes for the Roborock and 180 minutes for the Shark.

Matter and 5 GHz

The Roborock Saros 20 supports 5 GHz Wi-Fi, a child lock, Apple Home, SmartThings and Matter, plus Alexa, Google Home and Home Assistant. The Shark PowerDetect ThermaCharged RV2920XE is 2.4 GHz only, has no child lock, and does not support Apple Home, SmartThings or Matter. It does work with Alexa, Google Home and Home Assistant.

Detergent dosing

The Roborock Saros 20 doses detergent automatically and lists a 4L water tank. The Shark PowerDetect ThermaCharged RV2920XE does not have an automatic dispenser, and its tank size is not documented. Both wash and dry the mop and both lift it. Shark owners specifically praise heated washing at the base.

Which one to buy if

8% OFF
Prime exclusive deal
$1479.99
$1599.99
  • + Battery Life: 200 minutes
  • + Connectivity: 2.4 GHz WiFi, 5 GHz WiFi
  • + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
  • - Price: $1479.99 vs $1099.95
  • - Rating: 4.2 vs 4.3

What owners say

The two owner groups are happy about mopping and annoyed about different failures. Roborock Saros 20 owners praise 36,000 Pa on embedded dust and pet hair, a very low body, a quiet overnight run, and obstacle avoidance around cables. They complain about the price, detergent that is not in the box, threshold climbs that are inconsistent, and a battery that drops faster on a deep carpet run. Shark PowerDetect ThermaCharged RV2920XE owners single out heated mop washing and wood and tile that look outstanding, plus a quiet map. Their complaints are mechanical: robots that will not leave or find the dock, a self-clean cycle that reports a blockage that is not there, and water flow that stops on some units within months.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Roborock Saros 20
  • Shark PowerDetect ThermaCharged RV2920XE

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Frequently Asked Questions

Which is better overall: Roborock Saros 20 or Shark PowerDetect ThermaCharged RV2920XE?

The Shark PowerDetect ThermaCharged RV2920XE, on review standing, price, a two-year warranty and a larger onboard bin. The Roborock Saros 20 is the one with 36,000 Pa, a 200 minute rating, 5 GHz Wi-Fi and Matter. Shark suction is not documented.

What is the biggest difference between the Roborock Saros 20 and the Shark PowerDetect ThermaCharged RV2920XE?

Smart home reach, not the mop. The Roborock Saros 20 supports Matter, Apple Home, SmartThings, a child lock and 5 GHz Wi-Fi. The Shark PowerDetect ThermaCharged RV2920XE does not. Both mop, wash, dry, lift and self-empty.

Which robot vacuum has the higher published suction?

Only the Roborock Saros 20 publishes one, at 36,000 Pa. The Shark PowerDetect ThermaCharged RV2920XE leaves suction undocumented, so it is not scored as weaker. Runtime is 200 minutes for the Roborock and 180 for the Shark.

Does the Shark PowerDetect ThermaCharged RV2920XE work with Apple Home?

No. It works with Alexa, Google Home and Home Assistant, and it does not support Apple Home, SmartThings or Matter. The Roborock Saros 20 supports all of those, including Matter.

Who should buy the Shark PowerDetect ThermaCharged RV2920XE?

Buyers who want the more affordable robot vacuum, a two-year warranty, a larger onboard bin, and heated mop washing, and who are fine with Alexa, Google Home or Home Assistant on 2.4 GHz.

Who should buy the Roborock Saros 20?

Buyers who want a published 36,000 Pa, Matter with Apple Home, 5 GHz Wi-Fi, a child lock and the longer 200 minute rating, and who will pay more for that.

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