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Quick answer: Buy the G40 if you want stronger suction and the option of adding a self-empty station later. Buy the G30 if a larger onboard dustbin matters more and you are happy emptying it by hand.
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Eufy G30 vs Eufy G40: Specs at a Glance
Highlighted rows show where the two products differ.
Suction, noise and dustbin figures are from eufy support pages; run time and weight come from independent reviews, and one review lists 0.6 L for the G40 bin against eufy’s 420 mL.
Feature-by-Feature Breakdown
Suction and carpet
The G40 raises maximum suction to 2,500 Pa from the G30’s 2,000 Pa, and Robotbox gives it higher scores on both hardwood and high-pile carpet. The G30 is no weakling: Vacuum Wars measured strong surface pickup and suction well above the average of robots it has tested, though deep carpet cleaning trailed the field. If your home is mostly rugs and carpet, the extra suction on the G40 is the most useful upgrade you can buy here.
Winner: eufy G40
Dustbin and self-emptying
This is the real trade-off. eufy lists a 0.6-liter bin on the G30 and a 420 mL collector on the G40, so the older robot holds more between empties. The G40, though, can work with an auto-empty station, which eufy sells separately and the G40+ includes. The G30 has no self-empty option. If you want to stop handling the bin at all, the G40 is the only path. If you empty it often anyway, the G30’s bigger bin is a plus.
Winner: eufy G40
Navigation
Both robots use eufy’s Dynamic Navigation 2.0, with a dual-gyroscope and path-tracking sensor that eufy says keep the robot on straighter lines and reduce repeated passes. Neither is a laser-mapping robot, so keep expectations modest for a budget gyro system. Vacuum Wars found the G30 to be the best in its price range for navigation but noted it wedged under furniture more often than others. Because the system is shared, expect similar behavior from the G40, and clear low clearances first.
Winner: Tie
Noise
Eufy rates the G30 at 55 to 68 decibels and the G40 at up to 67, and Robotbox lists the G40 range as 52 to 67. In practice that is a very small gap, and it mostly matters on the highest suction setting. Neither robot is silent on boost, so plan to run either one while you are out of the room. The difference should not decide your purchase, though the G40 does technically come out slightly ahead.
Winner: eufy G40
Design and everyday use
Dimensions and weight are effectively identical, including the 72.5 mm height, and both work with the app, Alexa and Google Assistant. Neither mops, so look at the G30 Hybrid or G40 Hybrid if you want that. Reviews list run time around 100 minutes for each. These are older models, so check how they compare with eufy’s current lineup, but as simple gyro-navigated vacuums they remain easy to live with.
Winner: Tie
Winner by Category
Who Should Buy Which?
Buy the Eufy G30 if:
- You want the larger 0.6-liter onboard bin
- You mostly have hard floors and light rugs
- You do not plan to add a self-empty station
Check Eufy G30 Price on Amazon
Buy the Eufy G40 if:
- You have carpet and want 2,500 Pa suction
- You may add an auto-empty station later
- You prefer the slightly quieter top setting
Check Eufy G40 Price on Amazon
Frequently Asked Questions
Does the G40 come with a self-empty station?
No. The plain G40 supports one, but eufy says the station is ordered separately. The G40+ includes it.
Do these robots mop?
No. eufy lists no mopping or water tank on either base model; Hybrid versions add mopping.
Do they use laser navigation?
No. Both use gyroscope-based Dynamic Navigation 2.0 with a path-tracking sensor.
Which is quieter?
They are very close. eufy lists up to 67 dB for the G40 and 55 to 68 dB for the G30.
Final Verdict
The eufy RoboVac G40 is the better choice for most buyers. More suction and a path to self-emptying outweigh the smaller onboard bin. Pick the G30 if you value bin size over features and find it in stock at a clearly lower price.