The cheapest machine from any brand that maps with LiDAR and empties itself. Two years ago that combination started at around $400.
By Scooter M., Enthusiast - published September 2, 2026
We have not tested these machines. Everything here comes from published specifications, manufacturer manuals and retailer listings, all cited below. Prices last verified September 2, 2026.
How this is funded: if you buy through a link here we may earn a commission, at no extra cost to you. It does not change which machines we recommend or what we say about them. Full disclosure.
The Tapo RV20 Max Plus is the cheapest machine from any brand that combines LiDAR mapping with a self-emptying dock, at around $168. It publishes 5,300Pa in Ultra mode, a 3-liter bag rated for up to 60 days, a 3.27-inch body and a 0.87-inch threshold climb. It is the machine most responsible for that combination no longer costing $400.
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Tapo RV20 Max PlusLiDAR mapping and a 3-liter self-emptying dock, together, under $170. Two years ago that combination started at three times the price.
Scores come from the published rubric on How We Pick: suction 25%, navigation 25%, pet hair 20%, running cost 20%, setup 10%. Editorial judgments about published specifications, not test results.
What the specifications mean in a real home
LiDAR plus a dock, under $170. These are the two features worth paying for in this whole category, and this is the cheapest route to having both. If your budget is around $170 and you were choosing between features, this machine removes the choice.
3.27 inches tall. Slim for a machine carrying a LiDAR turret, which necessarily adds height. It will not clear what the 2.85-inch eufy clears, and it clears more than most mapping machines. As always, measure your lowest furniture first.
0.87-inch threshold climb. A real figure, published, and it clears most interior door saddles and rug edges. Only the Ecovacs N20 Plus's 20 mm beats it here.
Carpet boost plus carpet avoidance in mop mode, both automatic. That is the pair of behaviors that make a vacuum-and-mop machine usable in a home with rugs without you having to draw zones perfectly.
5,300Pa in Ultra mode. Tapo is explicit that this is the Ultra-mode figure rather than a running one, which is a more honest presentation than several rivals manage. It is a mid-range number and it is enough for hard floors and low pile.
The manufacturer figure to treat carefully
Tapo advertises over 97% dust pickup from its DeepVac system. There is no published test standard behind that number - no stated surface, no stated debris type, no stated method. It is a marketing figure rather than a specification, and we report it as one.
That is not an accusation of dishonesty; it is the norm in this category and Tapo is no worse than most. But a percentage with no method behind it cannot be compared to anything, and it should not carry weight in a purchase decision.
The bag question
The 3-liter bag lasts a published 60 days, which over three years is roughly 18 bags. The Ecovacs N20 Plus at around $215 has no bag at all, and over three years that difference in consumables is comfortably larger than the price gap between the two machines. If you are optimizing total cost rather than purchase price, that comparison is the one to run - the arithmetic is here.
Who should buy it
Anyone whose budget is around $170 who wants to stop thinking about the machine. It is the least expensive way to get the two features that actually change daily life.
Who should not
Anyone in a small flat, where the dock takes real floor space and the bin fills slowly enough that it is not earning its footprint - buy the dock-less RV20 Max instead. And anyone optimizing for running cost, who should look at the bagless docks.
What we did not verify
We have not handled this machine. Everything above is read from published specifications and the manufacturer's own documentation, cited below. These are the specific claims we could not check:
The 97% dust pickup claim. No test standard, surface or debris type is published, so there is nothing to check it against.
Whether the 60-day bag interval holds with pets or on carpet. It is Tapo's own figure for typical use.
How well the LiDAR handles dark or glossy flooring, which can defeat basic laser sensors. No detection data is published.
Whether 5,300Pa in Ultra mode is sustainable for a full run, or briefly available. Tapo does not say.
Battery capacity, runtime and longevity - none of the three is published for this model.
Noise - no decibel figure published.
App map stability after furniture moves, and long-term cloud service support.
That list is not a disclaimer bolted on at the end. It is the actual scope of this review, and anywhere a competitor's confident phrasing implies they checked these things without saying how, it is worth asking the same question of them.
LiDAR mapping and a 3-liter self-emptying dock, together, under $170. Two years ago that combination started at three times the price.
Published specifications
Suction
Up to 5,300Pa in Ultra modeSource: Manufacturer listing
Navigation
LiDAR with route planning and 2D house mappingSource: Manufacturer listing
Self-emptying
3 L sealed disposable bag, typically up to 60 daysSource: Manufacturer listing
Water tank
300 ml, 3 flow levelsSource: Manufacturer listing
Height
3.27 inSource: Manufacturer listing
Threshold climbing
Up to 0.87 inSource: Manufacturer listing
Dust pickup
Over 97% (manufacturer-reported, DeepVac)Source: Manufacturer listing
What it gets right
A self-emptying dock at this price is the single biggest quality-of-life feature in the category, and almost nothing else under $200 has one
Carpet boost plus carpet avoidance in mop mode, both automatic
0.87 inches of threshold climb clears most interior door saddles and rug edges
3.27 inches is slim for a machine with a LiDAR turret on top
What it gives up
The 3 L bags are a recurring cost the bagless docks do not have
97% dust pickup is a manufacturer-reported figure with no published test standard behind it
5,300Pa is the Ultra-mode peak, not what it runs at by default
The mop is a damp pad, not a scrubber
Our scoring
Suction7.5
Navigation8.0
Pet hair6.5
Running cost6.0
Setup8.0
Weights and the arithmetic behind the total are published on How we pick so you can recompute this yourself.
Who it is for: Anyone who wants to stop thinking about the machine entirely, on the smallest budget that makes that possible.
Skip it if: you object to buying dust bags forever. The Ecovacs N20 Plus and the Shark Matrix Plus both empty themselves without any consumable at all, and over three years that gap is real money.
Questions people actually ask
+−Is the Tapo RV20 Max Plus worth it?
At around $168 it is the cheapest machine from any brand combining LiDAR mapping with a self-emptying dock - the two features that most change how you live with a robot vacuum. If your budget is around that figure, it removes the need to choose between them.
+−What is the difference between the Tapo RV20 Max and the RV20 Max Plus?
The Plus adds the self-emptying base station with a 3-liter sealed bag. The robot itself is identical - same 5,300Pa, same LiDAR, same 3.27-inch body. When the price gap is small the dock is worth it for most people; in a small flat it often is not.
+−How long does the Tapo RV20 Max Plus bag last?
Tapo states up to 60 days on the 3-liter bag, which over three years works out to roughly 18 bags. The Tikom L8000 Plus publishes 90 days on the same capacity, and the Ecovacs N20 Plus uses no bag at all.
+−Is Tapo a good robot vacuum brand?
Tapo is TP-Link's smart-home line, so a large established networking manufacturer stands behind the app and the parts supply. For a cloud-connected appliance you expect to own for years, that is a genuine advantage over a small single-category brand.
+−Have you tested the Tapo RV20 Max Plus?
No. This review is built from Tapo's published specifications and product documentation, cited on this page, with an explicit list of the claims we could not verify - including its 97% dust pickup figure, which has no published test standard.
Sources
Every specification quoted above was read off one of these documents on the date shown. Where a manufacturer does not publish a figure, this site says "Not published" rather than estimating it.
