Roborock E20 vs Roborock E35 – Review and Comparison

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In this article, we will talk about two very popular robotic vacuums – Roborock e20 vs e35.

Nowadays, robotic vacuums are getting more and more popular, thanks to constant technological advancements. The manufacturers continuously improve their products, in order to make them more convenient and affordable to the customers.

This has resulted in a new problem which is picking the right robotic vacuum for your household. Even though there are only a few top brands, they produce hundreds of series and thousands of models, that are available on the market right now.

Comparing all of them is impossible, therefore, for now, we will stick to the most popular models. Today, we will talk about two products from a reliable brand – Roborock E20 vs Roborock E35. They are quite common among many beginners to this type of cleaning.

While they may not be the most budget models, they are great entry-level robotic vacuums with mapping. If you prefer to get something with many features and an advanced navigation system, they are definitely something to consider.

Based on the opinions online as well as our own experience, we will give you a thorough review of each unit. At the end of the article, you can also find a winner of this comparison.

Roborock E20 vs E35

Main differences

NAME:Roborock E20Roborock E35
SIZE:13.9 x 13.9 x 3.6 in.13.8 x 13.8 x 3.6 in.
WEIGHT:7 lb.6.5 lb.
CAPACITY:640 ml.640 ml.
BATTERY LIFE:100 minutes150 minutes

In the beginning, we would like to address, that both vacuums are actually very efficient units. What’s more, they should be sufficient for most people, at least in terms of everyday cleaning. That being said, there are a few key differences, that you should keep in mind.

The first crucial difference is suction power. Most of the time, the more suction a vacuum has, the better it is at removing deeply embedded dirt and debris. Increased suction can be particularly useful for vacuuming all kinds of pet hair and carpet cleaning.

Roborock E35 is a more powerful unit boasting 2000 Pa suction while the Roborock E20 provides 1800 Pa suction. Nonetheless, both units are actually quite powerful, and the suction difference shouldn’t be a problem most of the time.

Another important dissimilarity is the runtime. The runtime will be the main aspect limiting maximum cleaning time, therefore, if you own a bigger household or you want to cover a large area in one go, it’s definitely something to take into account.

Once again, the newer model – Roborock E35 boasts a better performance offering 150 minutes of runtime. Its opponent, the Roborock E20 can operate only for up to 100 minutes. You need to keep in mind, that those numbers are measures on hardwood floors in standard conditions.

What’s more, you should also remember, that both vacuums boast a special auto-recharge function which allows them to go back to their docking station, recharge, and continue cleaning. This isn’t, unfortunately, present in all robotic vacuums so it’s a great advantage.

Those are pretty much all the important differences, that you should keep in mind. Based on the factors above, you can already make the final decision. Although, we highly recommend to continue reading, in order to learn more well-detailed information.

Cleaning performance

Cleaning performance is one of the most important aspects when choosing a new cleaning device. By this, we mean how well a particular product does, compared to other units from a similar price range. Honestly, we have to say, that both products do pretty well in terms of overall performance.

Both Roborock E20 and Roborock E35 boast both vacuum and mopping functions which is quite uncommon in robotic vacuums. Most of the manufacturers focus strictly on dry vacuuming and improving this function while in those models, you can quickly attach a wet mopping pad with a filled water tank.

This combination does a pretty good job, although, it won’t be as good as standard mopping. This is more for keeping the dust out of your hardwood floors, than for heavy cleaning. You also need to keep in mind, that the vacuum won’t stop when it finds any carpets.

Roborock implemented a very efficient, advanced navigation system that works great in both vacuums. Thanks to multiple sensors, the units can map out your entire house, in order to find the best possible cleaning path. This is much better compared to just randomly bouncing around the house.

Additionally, all the floors can be found in the special manufacturer’s app, which can be downloaded to your phone. Unfortunately, the map isn’t interactive, so you can’t set any no-go zones or special clean zones for the vacuum to focus on. 

Another great advantage of the Roborock vacuums is that they keep the map saved, even when they get stuck. This isn’t always the case, as the vacuums tend to clean the same area twice after getting them out of a tight spot.

The app alone is actually an advanced control panel, that allows you to change all the settings you want. It’s the place to schedule your next cleaning, choose the desired cleaning mode (mopping, silent, standard, strong, max), or even navigate the vacuum remotely using a few buttons.

Both vacuums also boast a carpet boost mode, that can be turned on in settings. This mode makes the vacuums increase their suction when they detect a carpeted area. It’s a useful feature, as you don’t have to run them constantly in the max mode to achieve clean carpets.

NOTE: Both Roborock E20 and Roborock E35 are very good in terms of cleaning carpets and removing pet hair. The hair doesn’t clog or get stuck, opposed to other popular robotic vacuums. The Roborock models also don’t have any problems entering or leaving carpets.

The special mopping function is available in both models, and it allows you to get the floor relatively clean from any small stains. You just have to attach the mopping pad and water tank, in order to start mopping. However, remember to keep the carpets away if you don’t want them to get wet.

Those are pretty much all the important aspects of the cleaning performance. Of course, there may be more indirect factors, that alter the cleaning performance, however, we will talk about those in the latter part of the article.


Capacity, most of the time, won’t be a factor limiting maximum cleaning time, as the vacuums tend to run out of battery sooner than from empty space in the dust bin. Nonetheless, it’s definitely something to take into account if you don’t fancy emptying the dust bin too often.

In this case, both Roborock E20 and Roborock E35 have the same capacity – They both can hold up to 640 ml. (21 oz.) of dirt and debris and around 150 ml. (5 oz.) of water when it comes to the water tank capacity.

This is actually a pretty standard capacity, that should be more than enough for most of the users. Of course, in the end, it depends on how often you want to empty the dust bin.

Noise level

Noise level is an aspect, that’s often skipped when comparing robotic vacuums, however, we always take this factor into account. After all, robotic vacuums were created in order to free up our time, therefore, an extra loud unit running in the background can be quite distracting.

The noise level in both Roborock E20 and Roborock E35 is around 60 dB, which is once again a pretty average score. Most of the units produce exactly this amount, and to make it more understandable, it’s similar to the noise level of a standard conversation or a microwave operating.

Remote control features

The manufacturers usually implement multiple remote control features, in order to make using their products easier and more convenient. Things such as voice commands, special smartphone apps, and remote controllers are standard.

In this case, we can also find multiple ways to operate our new robotic vacuums. Probably the most advanced and convenient one is the official manufacturer’s smartphone app. It allows you to change all the important settings as well as operate the vacuum with a few buttons.

The vacuums can also be operated using simple voice commands, after connecting them to Google Assistant or Amazon Alexa.

Battery life

The battery life is an important aspect, as it’s the main limiting factor in terms of maximum cleaning time. Therefore, if you want your new vacuum to operate as long as possible in one go, it’s definitely something to keep in mind. We also recommend taking this aspect into consideration if you own a big household.

Roborock E20 can operate only for 100 minutes while the Roborock E35 can run for as long as 150 minutes. It’s quite a significant difference, that definitely allows for more cleaning in one go.

You should also keep in mind, that there is a special auto-recharge function that allows the vacuums to go back to their docking station, recharge, and continue cleaning after. This is a big advantage, that makes the runtime difference a little less important.


Design is another important aspect of every robotic vacuum, as they need to fit under and around most of the furniture. What’s more, most of the time, the design has to remain convenient and easy to use. Thankfully, both units meet all the requirements mentioned above.

If you would like to learn some more technical information, Roborock E20 measures 13.8 x 13.8 x 3.6 in. and weighs 6.61 lb. while the Roborock E35 measures 13.8 x 13.8 x 3.6 in. and weighs 6.5 lb. As you can see, both products are quite portable which inevitably is an advantage.


Price is another crucial aspect, however, most people check the price difference right away. Therefore, you probably already know the price difference, nonetheless, we still decided to touch on this aspect.

Roborock E20 can be found on Amazon for the price of around $350.00 (Click here to see the price!) while the Roborock E35 can be found on Amazon for the price of $349.99 (Click here to see the price!).

We always highly recommend double-checking the price as it tends to fluctuate a lot. Even now, both products can be found discounted when you click the links above.


Maintenance is another aspect, that is often skipped by people who own robotic vacuums. It’s a huge mistake, as in order to keep your new Roborock product operating at the desired level, as well as to prevent permanent damage you should always take proper maintenance steps.

We won’t be getting into details here, as it would make the whole article too long. We will, however, give you a couple of basic maintenance tips, that should work for the majority of robotic vacuums.

In order to keep your new Roborock operating at the desired level, you should:

  • Regularly clean/rinse all the brushes
  • Regularly check the brush roll and side brushes for any stuck dirt and/or debris
  • At least once a week clean the cover of the vacuum/wheels
  • Replace any used or damaged elements as fast as possible
  • Regularly empty and check the vacuum’s dustbin for any stuck dirt or debris
  • Regularly empty and check the vacuum’s water tank for any stuck dirt or debris

Once again, we need to address, that those are only a couple of basic maintenance steps. If you want to learn all the essential details, you will have to read the user’s guide.


In conclusion, both Roborock E20 and Roborock E35 are very efficient units. Either one of them should meet most of your requirements, offering an advanced navigation system with great suction. Although, there are a few key differences, that you should know about before you make the final decision.

Some of the most important differences are suction (Roborock E35 has 200 Pa more suction), and runtime (Roborock E35 can operate for 50 minutes longer).

Based on the factors above, we can easily say, that the Roborock E35 is a winner of this comparison. It beats its competitor in almost every aspect – The only thing to be aware of is the price. This model can be often found more expensive, compared to the basic Roborock E20.

We hope, that after reading this article you will be satisfied with your final choice.