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Robot Vacuums · Head to head

Roborock Saros 20 Sonic 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
Value wins this one: the Shark PowerDetect ThermaCharged RV2920XE is the better buy even though the Roborock Saros 20 Sonic wins the spec sheet.
Shark PowerDetect ThermaCharged RV2920XE
Winner
Shark PowerDetect ThermaCharged RV2920XE
$1099.95$1199.998% OFF
Buy on Amazon USA
The Shark PowerDetect ThermaCharged RV2920XE is the more affordable of the pair, carries a two year warranty against one, and holds a larger 379 ml onboard bin. The Roborock Saros 20 Sonic is the stronger cleaner on paper: 36,000 Pa, a 79.8 mm body, 190 minutes against 180, automatic detergent dosing, 5 GHz Wi-Fi and Bluetooth, and support for Apple Home, SmartThings, Home Assistant and Matter. Both wash and dry their mops at the dock, self-empty and lift the mop over carpet. Pick the Shark PowerDetect ThermaCharged RV2920XE for a well-priced hands-off clean, and the Roborock Saros 20 Sonic for maximum power and platform reach.
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FeatureRoborock Saros 20 SonicShark PowerDetect ThermaCharged RV2920XEWinner
Price$1499.99$1099.95Shark PowerDetect ThermaCharged RV2920XE
Rating4.24.3Shark PowerDetect ThermaCharged RV2920XE
Warranty1 year2 yearsShark PowerDetect ThermaCharged RV2920XE
Battery Life190 minutes180 minutesRoborock Saros 20 Sonic
Connectivity2.4 GHz WiFi, 5 GHz WiFi, Bluetooth2.4 GHz WiFiRoborock Saros 20 Sonic
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Home AssistantRoborock Saros 20 Sonic
Onboard Dustbin Capacity228ml379mlShark PowerDetect ThermaCharged RV2920XE
Auto RechargeYESYESTie
Navigation TypeLaser (LiDAR)Laser (LiDAR)Tie
Obstacle DetectionYESYESTie
Cliff DetectionYESYESTie
Multi-Room MappingYESYESTie

What the differences mean

Warranty

The Shark PowerDetect ThermaCharged RV2920XE carries a two year warranty, against one year on the Roborock Saros 20 Sonic, on machines full of pumps, heaters and motors. For a robot doing wet work daily, that coverage is the structural difference the spec sheet makes easiest to read.

Onboard bin

The Shark PowerDetect ThermaCharged RV2920XE holds 379 ml onboard, ahead of the 228 ml on the Roborock Saros 20 Sonic. Both self-empty into their docks, so the larger onboard bin mostly matters in a home with shedding pets running long jobs.

Suction

The Roborock Saros 20 Sonic is rated at 36,000 Pa. Shark does not publish a suction figure for the Shark PowerDetect ThermaCharged RV2920XE, so the two cannot be measured against each other. The Roborock is the one built as the high-suction flagship.

Runtime and charging

The Roborock Saros 20 Sonic is rated for 190 minutes and recharges in about 2.5 hours. The Shark PowerDetect ThermaCharged RV2920XE is rated for 180 minutes and takes about 4 hours. The run times are close; the charging gap is not.

Connectivity and smart home

The Roborock Saros 20 Sonic joins 5 GHz Wi-Fi and has Bluetooth, and adds Apple Home, SmartThings and Matter to Alexa, Google Home and Home Assistant. The Shark PowerDetect ThermaCharged RV2920XE is 2.4 GHz only and stops at Alexa, Google Home and Home Assistant.

Detergent

The Roborock Saros 20 Sonic doses detergent automatically from a 4 L tank. The Shark PowerDetect ThermaCharged RV2920XE has no automatic dispenser, so cleaning solution goes into its reservoir by hand. Both wash and dry the mop at the dock.

Which one to buy if

Roborock

Roborock Saros 20 Sonic

12% OFF
Prime exclusive deal
$1499.99
$1699.99
Buy on Amazon USA
  • + Battery Life: 190 minutes
  • + Connectivity: 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth
  • + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
  • - Price: $1499.99 vs $1099.95
  • - Rating: 4.2 vs 4.3

What owners say

The Shark PowerDetect ThermaCharged RV2920XE is the only side of this pair with owner reviews, and they are notably positive. Parents describe running it every night once a baby started crawling, pet households say they rarely mop by hand any more, and reviewers praise quiet operation, accurate mapping and correct carpet-versus-hardwood detection. Whole-home coverage on a single charge is called out, with a recharge needed only when vacuuming and mopping run together, and mopping on wood and tile is described as outstanding. The failures owners report concern the dock and mop system: trouble leaving or returning to the dock, a mop self-cleaning cycle that falsely reports an obstruction, water dispensing stopping on some units within months, and instructions that are hard to follow.

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 Sonic
  • Shark PowerDetect ThermaCharged RV2920XE

Loading price history...

Frequently Asked Questions

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

The Shark PowerDetect ThermaCharged RV2920XE for most buyers: it costs far less, has a two year warranty and a larger onboard bin, and still heat-washes and dries its mop. The Roborock Saros 20 Sonic is the flagship with more suction, a slimmer body and Matter support.

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

Price and platform reach. The Roborock Saros 20 Sonic is a premium flagship with 36,000 Pa, automatic detergent and Apple Home, SmartThings and Matter, while the Shark PowerDetect ThermaCharged RV2920XE is the cheaper option with a longer warranty.

Do both robots wash and dry their mops?

Yes. The Roborock Saros 20 Sonic and the Shark PowerDetect ThermaCharged RV2920XE both wash and dry their mops at the dock, empty their dustbin and lift the mop over carpet. Only the Roborock doses detergent automatically.

Which runs longer on a charge?

The Roborock Saros 20 Sonic, rated for 190 minutes against 180 on the Shark PowerDetect ThermaCharged RV2920XE, and it recharges in about 2.5 hours instead of about 4.

Who should buy the Roborock Saros 20 Sonic?

Premium buyers with carpets and low furniture who want the most suction and support for Apple Home, SmartThings or Matter.

Who should buy the Shark PowerDetect ThermaCharged RV2920XE?

Families and pet owners with wood and tile floors who want heated mop washing and a self-emptying base at a sensible price, with a two year warranty.

Full comparison table

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