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Deebot OZMO 930 robot vacuum wet/dry in the house (review)
3.6Overall Score

Ecovacs Robotics released its latest Deebot OZMO 930 wet and dry robot vacuum cleaner late in 2017 – it is a formidable little vacu-bot in the right circumstances.

Having had experience now with another robot vacuum  (Samsung VR9300 review here) I now have a good baseline to compare features.

This review is not a shootout between the two – they are very different devices and suit different needs and house styles.

This Deebot has an OZMO mopping system, interchangeable suction inlets (one rotating brush and without brush), carpet identification mode (increases suction power) and an app that shows the house floor map, where it is and what it has cleaned.

Let’s start with specifications – Deebot OZMO 930

  • Weight: 4.6kg
  • Charge time: three to four hours (tested closer to 4 hours)
  • Runtime: claimed 110 minutes (in our tests 40 minutes was maximum with a 70/30 timber/carpet floor mix)
  • Maximum obstruction (door sill) negotiation height: 16mm (no water in the tank) – ambitious!
  • Minimum clean height under furniture 11cm
  • Brush size: 15cm plus side ‘whisker’ brushes extending reach out to 30cm (total)
  • Noise: Claimed 65 dBA max (typical 60dB but can reach 80dB on carpet)
  • Dustbin capacity: 470ml (.47 litre) with HEPA filter (brush, not wash clean)


  • Place the docking station adjacent to a power point and next to a wall leaving at least 500mm clear each side.
  • Charge the Deeboot – four hours from empty
  • Download the ECOVACS app
  • Ensure you are connected to a 2.4GHz (not 5GHz) Wi-Fi channel on your router
  • Turn the Deebot manual switch to on and press Wi-Fi pairing
  • It appears on your smartphone Wi-Fi list as ECOVACS XXXX – connect
  • If successful it is ready to go. I made the mistake of using a 5GHz Wi-Fi channel initially.
  • Press Auto, and it gives a voice indication it is cleaning

Smart Navi

It uses a low powered laser as well as a collision bumper and step sensors to map out the floorplan. The floorplan is updated if it subsequently finds new areas. It took three runs to fully map a single level 3-bedroom house.

It starts by backing out of the docking station, turns around 180° and proceeds until it encounters an obstacle. It then turns (left or right) to offset the cleaning area by 30cm and retraces the initial path.

Initially, I set it up on the ‘short’ side, e.g. smallest distance from left to right sides of the house. I realised that it is better to set it up on the long side as it gets a better run – fewer turns.

It avoided steps down (or it would have cascaded down one level).

Room setup

You cannot expect any robot cleaner just to work!

As a guide lift all chairs off the ground (if you want it to clean under tables); get rid of loose electrical cables; remove clothes/shoes/bags on the floor; build lower gradient ramps if the door sill is over 15mm (if you want it to clean in those areas); close doors to areas you don’t want cleaners, and if necessary set up virtual no-clean boundaries in the floorplan.

Floor types

It works well on timber (bamboo tested) and tiled floors with and without the spinning brush. The relatively narrow 15cm rotating brush is also fed by a whisker brush on each side. In theory, it cleans up to 30cm width. In practice, it can miss light debris under the whiskers. The whisker brushes are far from perfect for edge cleaning.