Everyone in this category says they tested twenty vacuums. We have not tested any, and we say so. What we do instead is read the manuals, compile the published specifications, and work out what each machine costs to run for three years — the method is written out in full.
We earn a commission if you buy through the links on this page, at no extra cost to you. It never changes what we recommend or the order we recommend it in. Full disclosure.
Worth it if a pet lives there. Probably not otherwise. A dock converts emptying from a task you do after every run into one you do five or six times a year. In a shedding household the on-board bin fills every single run, so the dock is transformative. On lightly-used hard floors, the on-board bin lasts a week anyway and the dock is solving a problem you do not have.
What the dock actually changes
Robot bins are small — 200 to 270 ml on most mapped machines. A dock takes that 200 ml buffer and empties it into a 2.5 to 2.7 liter bag, which is roughly ten times the volume. The manufacturers publish the resulting interval: iRobot states 75 days, Lefant states 75 days, Roborock states 7 to 9 weeks, Shark states 60 days, and ILIFE states up to 280 days across the five bags in the box.
That is the whole feature. It does not clean better, it does not navigate better, and it does not extend runtime. It changes how often the machine demands your attention, from roughly daily to roughly bi-monthly.
The cost the sticker price hides
Every one of those docks except Shark's is bagged, and bags are a consumable you buy forever. At the manufacturers' own stated intervals, a self-emptying robot goes through roughly five bags a year (iRobot and Lefant, at 75 days) to six or seven (Roborock, at 7-9 weeks). Over three years that is fifteen to twenty-one bags.
We are not going to print a dollar total, because bag prices move and this site only shows prices that come from the live layer. What we will do is state the quantity clearly, because that is the number nobody puts next to the machine's price — and because fifteen to twenty-one of anything is a real recurring purchase.
The published comparison
Manufacturer-published dock specifications.
Machine
Dock type
Stated interval
Dock filtration
Bags per year
Shark AV2501AE
Bagless
60 days
True HEPA, 99.97% to 0.3 microns
None
Roomba 105 Vac + AE
Bagged
75 days
99% of allergens to 0.7 microns
About 5
Roomba 105 Combo + AE
Bagged
75 days
99% of allergens to 0.7 microns
About 5
Roborock Q7 M5+
Bagged, 2.7 L sealed
7-9 weeks
Not published
About 6-7
Lefant M2 Plus
Bagged, 2.5 L
75 days
Not published
About 5
ILIFE A30 Pro
Bagged, 2.5 L
Up to 280 days across 5 bags
Not published
About 5
Bags-per-year is arithmetic from each manufacturer's own stated interval, not a measurement.
#
Product
Best for
Score
Price
01
Shark AI Robot with XL HEPA Self-Empty Base (AV2501AE)The only self-empty dock here with no bags to buy — bagless, HEPA-filtered and rated at 60 days, which changes the three-year arithmetic completely.
iRobot Roomba 105 Vac with AutoEmpty DockThe same robot as the 105 Vac with the dock that changes how you live with it: 75 days between bag changes instead of an emptying chore every run.
Roborock Q7 M5+ Robot Vacuum and Mop10,000 Pa published and a 2.7-liter sealed dock bag rated at seven to nine weeks: the pet-hair answer, at a real price.
ILIFE A30 Pro Robot Vacuum and Mop10,000 Pa and a five-bag box that ILIFE rates at up to 280 days of hands-free running — the longest published interval on the site.
Scores are ours, from the published rubric on the How We Pick page. They are editorial judgments about published specifications — not test results. We have not handled these machines.
01 · Best bagless self-empty
Shark AI Robot with XL HEPA Self-Empty Base (AV2501AE)
The only self-empty dock here with no bags to buy — bagless, HEPA-filtered and rated at 60 days, which changes the three-year arithmetic completely.
True HEPA, rated to capture 99.97% of dust and allergens down to 0.3 microns
Rated runtime
120 minutes with recharge and resume
Navigation
360-degree LiDAR with Matrix Clean grid coverage
Brushroll
Self-cleaning
Weight
15.3 lb
Suction in Pa
Not published
Every figure above is the manufacturer's own published number. Where a manufacturer publishes nothing, the row says "Not published" rather than an estimate.
What the numbers say
+Bagless dock — no consumable at all, which no other self-empty robot on this site can say
+True HEPA on the dock, so emptying does not re-release what it collected
+Matrix Clean makes multiple passes over dirty areas rather than one
+Self-cleaning brushroll
Where it stops
−Emptying a bagless dock does put you back in contact with the dust, HEPA or not
−No published suction figure in any unit
−15.3 lb with the base is the heaviest robot package here
Who it is for
Anyone who has done the maths on dock bags over five years and did not like the answer.
Skip it if
Allergies are the reason you are buying a self-empty robot at all. A bagged dock is the better answer for that specific problem, even though it costs more to run.
Our score: 8.1 out of 10
Published suction6.0
Navigation8.5
Runtime8.0
Bin and dock9.0
Running cost9.0
Scored against the published rubric on How We Pick. These are judgments about spec sheets, not measurements.
02 · Best self-empty under $400
iRobot Roomba 105 Vac with AutoEmpty Dock
The same robot as the 105 Vac with the dock that changes how you live with it: 75 days between bag changes instead of an emptying chore every run.
Ongoing consumable — roughly five bag changes a year at the stated 75-day interval
Suction in Pa
Not published
Every figure above is the manufacturer's own published number. Where a manufacturer publishes nothing, the row says "Not published" rather than an estimate.
What the numbers say
+75 days between interactions is the single biggest quality-of-life feature in this category
+Bagged dock means emptying does not put dust back in the room, which matters for allergies
+Identical mapping and runtime to the cheaper 105 Vac — you are paying only for the dock
Where it stops
−Dock bags are a permanent running cost that the dockless version does not have
−The dock is bulky and needs clear floor space either side
−0.1-gallon on-board bin is small, which is fine only because the dock exists
Who it is for
Pet households and larger homes, where the on-board bin fills every single run.
Skip it if
Your floor is mostly hard surface and lightly used. At that dirt load the on-board bin lasts a week anyway, and the dock is solving a problem you do not have.
Our score: 8.4 out of 10
Published suction6.5
Navigation9.0
Runtime10.0
Bin and dock9.5
Running cost6.0
Scored against the published rubric on How We Pick. These are judgments about spec sheets, not measurements.
03 · Best self-empty for pet hair
Roborock Q7 M5+ Robot Vacuum and Mop
10,000 Pa published and a 2.7-liter sealed dock bag rated at seven to nine weeks: the pet-hair answer, at a real price.
JawScrapers main brush plus zero-tangle side brush
Mopping
Three adjustable water levels, simultaneous with vacuuming
Rated noise
65 dB
Every figure above is the manufacturer's own published number. Where a manufacturer publishes nothing, the row says "Not published" rather than an estimate.
What the numbers say
+Highest published suction figure on the site, at 10,000 Pa
+2.7-liter dock bag is larger than the iRobot's and rated for a comparable interval
+Anti-tangle on both brushes, which is the pet-hair spec that matters
+150 minutes plus recharge-and-resume covers a large floor
Where it stops
−Dock bags are a permanent consumable
−The dock is large and 65 dB when emptying is genuinely startling the first time
−Pa figures remain incomparable between brands, however impressive 10,000 sounds
Who it is for
Pet households with real square footage, where the on-board bin is the daily annoyance.
Skip it if
You live in a studio. This is a whole-floor machine with a dock the size of a wastebasket and you will resent the footprint.
Our score: 8.5 out of 10
Published suction9.5
Navigation9.0
Runtime8.5
Bin and dock9.5
Running cost6.0
Scored against the published rubric on How We Pick. These are judgments about spec sheets, not measurements.
04 · Best mapping under $300
iRobot Roomba 105 Vac
LiDAR mapping, keep-out zones and a 200-minute rating from the brand that will still be supporting the app in five years.
70x more power-lifting suction, compared by the manufacturer against the Roomba 600 series
Control
Roomba Home app, on-device buttons, voice assistants
Wi-Fi
2.4 GHz required for setup and operation
Suction in Pa
Not published
Every figure above is the manufacturer's own published number. Where a manufacturer publishes nothing, the row says "Not published" rather than an estimate.
What the numbers say
+200 minutes rated, the longest published runtime of any robot on this site
+Real LiDAR mapping, keep-out zones and room targeting at a budget price
+Recharge-and-resume, so a large floor completes without you
+iRobot's app and parts supply are the most durable bet in the category
Where it stops
−The 70x suction claim is measured against iRobot's own decade-old 600 series, not against a competitor
−No self-empty dock in this configuration — you empty the on-board bin
−No published bin volume
Who it is for
Multi-room homes that want scheduled, mapped cleaning without a self-empty dock's price.
Skip it if
Nobody in the house will install an app. Half of what you are paying for is mapping, zones and scheduling, and none of that exists without the phone.
Our score: 8.0 out of 10
Published suction6.5
Navigation9.0
Runtime10.0
Bin and dock6.0
Running cost7.5
Scored against the published rubric on How We Pick. These are judgments about spec sheets, not measurements.
05 · Cheapest self-empty
Lefant M2 Plus Robot Vacuum and Mop
6,000 Pa, LiDAR mapping and a 2.5-liter self-empty station rated at 75 days, from the least-known brand here.
2.5 liters, rated up to 75 days hands-free; ships with two bags
Dustbin
250 ml on-robot
Water tank
300 ml, three suction levels
Navigation
360-degree LiDAR with multi-floor mapping and no-go zones
Obstacle detection
190-degree PSD detection, stated to avoid objects from 1.6 inches away
Wi-Fi
Dual-band 2.4 GHz and 5 GHz
Every figure above is the manufacturer's own published number. Where a manufacturer publishes nothing, the row says "Not published" rather than an estimate.
What the numbers say
+Self-empty dock at the bottom of the price band, which is where the genuine saving is in this category
+Carpet detection lifts or avoids depending on whether the mop holder is fitted
+Dual-band Wi-Fi — the only robot here that does not force you onto 2.4 GHz
+Two dock bags in the box
Where it stops
−6,000 Pa is the lowest published suction of the self-empty machines here
−250 ml on-robot bin is tiny, which the dock only partly excuses
−Small brand: app longevity and dock-bag availability in year four are unknowns
Who it is for
Buyers who want self-emptying at the lowest possible entry price and accept the brand risk.
Skip it if
You want the app to still work in 2032. iRobot and Roborock are safer bets on software support, and a self-empty robot is worthless once its dock bags stop being sold.
Our score: 7.7 out of 10
Published suction7.0
Navigation8.5
Runtime8.5
Bin and dock8.5
Running cost6.0
Scored against the published rubric on How We Pick. These are judgments about spec sheets, not measurements.
06 · Longest dock interval
ILIFE A30 Pro Robot Vacuum and Mop
10,000 Pa and a five-bag box that ILIFE rates at up to 280 days of hands-free running — the longest published interval on the site.
2.5 liters, five in the box, rated up to 280 days hands-free in total
Tank
2-in-1 integrated: 200 ml dustbin plus 200 ml water tank
Navigation
LDS LiDAR with SLAM mapping, no-go zones and virtual walls
Weight
10.4 lb
Rated noise
72 dB
Every figure above is the manufacturer's own published number. Where a manufacturer publishes nothing, the row says "Not published" rather than an estimate.
What the numbers say
+Five bags in the box is real money that the competition charges separately for
+Full LiDAR SLAM mapping with virtual walls at a budget price
+10,000 Pa published, matching the dearest robot here
Where it stops
−72 dB is the loudest robot figure on the site
−200 ml dustbin is the smallest here — the 2-in-1 tank splits capacity with the water
−The 150-minute rating is explicitly the gentle-suction number
Who it is for
Buyers optimizing for the longest possible gap between touching the thing.
Skip it if
You want to run it while you are home. At 72 dB it is a run-it-when-you-are-out machine.
Our score: 8.2 out of 10
Published suction9.0
Navigation8.5
Runtime8.0
Bin and dock8.5
Running cost7.0
Scored against the published rubric on How We Pick. These are judgments about spec sheets, not measurements.
The allergy case cuts the other way
If dust allergy is why you want a dock, the bagged ones are the right answer despite their ongoing cost. A sealed bag goes into the bin closed. iRobot publishes bag filtration at 99% of allergens as small as 0.7 microns, which is a specific, checkable claim. Shark's bagless dock has excellent filtration while it is running and still requires you to open a bin of concentrated fine dust to empty it.
This is exactly the same trade as bagged versus bagless vacuums, in miniature, and it resolves the same way: bags cost money and protect you at the moment of emptying; bagless saves money and does not.
Who should buy a dock
Pet households. The on-board bin fills every run. This is the case the dock was built for.
Anyone over about 1,500 square feet. More floor means more debris per run, whatever is shedding.
Allergy households — but buy a bagged dock, and treat the bags as part of the price.
Anyone who has stopped using a robot because the daily emptying became a chore. That is a very common failure mode and the dock is the fix.
Who should not
Small hard-floor homes. The 600 ml eufy 11S MAX bin goes a week at that dirt load; a dock adds cost and floor space for nothing.
Anyone short of floor space. These docks are bulky and need clearance either side.
Light sleepers, if it runs at night. Roborock publishes 65 dB for the Q7 M5+, and the emptying cycle is startling the first time.
What we cannot tell you
Whether the stated intervals hold in your house. 75 days assumes a particular dirt load and nobody publishes the assumption behind it. A shedding shepherd will fill a bag faster than a single person on tile, and the difference is likely large. Treat the published intervals as the manufacturers' best case.
Common questions
Is a self-emptying robot vacuum worth the extra money?+−
In a pet household, yes — the on-board bin fills every run, so the dock changes the machine from a daily chore to a bi-monthly one. On lightly-used hard floors, the on-board bin lasts a week anyway and the dock solves a problem you do not have.
How often do you change the bag in a self-emptying dock?+−
At the manufacturers' stated intervals — 75 days for iRobot and Lefant, 7 to 9 weeks for Roborock — roughly five to seven bags a year, or fifteen to twenty-one over three years. That is the running cost the sticker price hides.
Is there a self-emptying robot without bags?+−
Yes: the Shark AV2501AE publishes a bagless self-empty base with true HEPA filtration and a 60-day capacity. No consumable at all. The trade is that emptying a bagless dock puts you back in contact with the dust.
Are self-emptying docks loud?+−
The emptying cycle is a short burst of high suction and it is startling the first time. Roborock publishes 65 dB for the Q7 M5+ and ILIFE 72 dB for the A30 Pro — both well above the 45 to 55 dB of the quiet unmapped robots.
Which dock is best for allergies?+−
A bagged one, despite the cost, because the bag goes into the bin sealed. iRobot publishes bag filtration at 99% of allergens as small as 0.7 microns, which is a specific and checkable claim.
Sources
Manufacturer-published specifications — Every runtime, wattage, capacity, weight, filtration and warranty figure quoted on this page is the manufacturer's own published number for that model, retrieved September 1, 2026. Where a manufacturer publishes no figure, the page says 'Not published' rather than estimating one.
Sweep & Suction — How We Pick — Our published method, including the scoring rubric, the three-year running-cost formula and an explicit statement of what published specifications cannot tell you.
