Robotic lawnmower test: The best robotic lawn mowers

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Mähroboter kaufen: So finden Sie den richtigen

Robotic lawnmowers are comfortable and – when used correctly – also good for the environment. The way you mow promotes biodiversity in the garden. CHIP looked at eight current devices. This time we were particularly interested in how safe the devices are for humans and animals. And what the apps and voice assistants offered to operate them are really good for. We give tips for safe and ecologically correct use.

Playground, lawn, living space, food source – the green anteroom has many tasks. To do this, it needs to be ventilated, weeded, de-moistened, fertilized. A lot of work if you have to do everything yourself. Or if you buy a robotic lawnmower, the lawn care is almost done by itself. Because they mulch, there is no clippings to clear. They fertilize the soil, demonstrably promote biodiversity and prevent moss and matting. To the delight of all the neighbors, almost noiselessly and without exhaust fumes. You don't even have to worry about installing and laying the perimeter wire if you buy the digital gardener from a specialist dealer and negotiate it skillfully. There are models that do not need a perimeter wire, but they are devices for very special applications. More about this towards the end of the article.

As is common in the electrical industry, prices for robotic lawnmowers are also falling. Compared to the previous year, they all fell by a few hundred euros on average.

You can read this in this entry: First we will test all models in detail in front. Then we go into our test procedure. Then we explain the important advantages and disadvantages of robotic lawnmowers and summarize buying and operating tips in a buying guide.

The best robotic lawnmowers in the test

test winner Price tip Area supervisor


Husqvarna Automower 315 X

Worx Landroid S 300

Honda Miimo HRM 3000

Overall grade

1.4 (very good)

2.1 (good)

1.6 (good)


3.2 (satisfactory)

3.6 (sufficient)

2.6 (satisfactory)


1.0 (very good)

2.0 (good)

1.1 (very good)


1.0 (very good)

1.1 (very good)

1.4 (very good)

Documentation & Service

1.9 (good)

3.4 (satisfactory)

2.3 (good)

Recommended area

1.600 m²

300 m²

4. 000 m²

Special equipment


removable battery

blade gripper




spinning top

cutting width

214 mm

180 mm

250 mm

Average mowing time

71 min

85 min

243 min


connection: GSM / WLAN / BT

● / ○ / ●

Optional / ● / ○

○ / ○ / ●

voice control: Alexa / Google Home

● / ○

○ / ○

○ / ○

Immediate knife stop

PIN / GPS location / game stop

● / ● / ○

● / ○ / ○

● / Optional / ○


1.800 Euro

500 Euro

2. 830 Euro

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Test winner: Husqvarna Automower 315 X

  • Automower 315X

    Source: offer

    Husqvarna Automower 315 X

    Overall grade: 1.4 (very good) ; Power: 3.2; Features: 1.0; Ergonomics: 1.0; Documentation & Service: 1.9

Uses GPRS for location
Automatically adjusts mode
Very quiet
Integration into Gardena-Smart -Home system
No rain sensor
Headlights can only be switched on on the device

In the test, the Husqvarna Automower 315 X best of all, because it cuts a good figure on any terrain. It reports the location via GPRS, which is useful on extensive latifundia or in the event of theft. If it detects an increased power consumption of the engine, it closes on tall grass and goes into spiral mode. If this happens more often, he even adjusts the mowing intervals independently. In steep terrain, it also switches to zigzag mode, making it more energy-efficient to manage vegetation on the slope. The robot is the quietest in the test.

The Husqvarna also offers an additional search cable. You have to lay this across the mowing area, which means more effort. But the mower can easily be moved to far corners later in operation. It also finds its way back to the base station more quickly via this guide wire. Other mowers have to shimmy along the edge back to the base. It can be integrated into the Gardena smart garden system. He can then coordinate his work with the automatic irrigation system or the Gardena soil and rain sensor.

If you don't have a smart system, the rain sensor is missing, which is a pity The model also offers headlights, but they can only be switched on and off on the device. If that were possible via the app, it would be easier to find him in the dark.

The Husqvarna Automower 315 X is exemplary with obstacles. Picture: CHIP

The area master: Honda HRM 3000

  • Source: Honda

    Honda Miimo HRM 3000

    Overall grade: 1 , 6 (good) ; Power: 2.6; Features: 1.1; Ergonomics; 1.4; Documentation & Service: 2.3

For large areas
Great battery performance
Knives rotate a long time
Quite rude
High energy consumption in idle

The Honda HRM 3000 is for 4. 000 m² designed, so also copes with very large areas. With a total of four wheels, two drive wheels and two guide wheels, it is more off-road than models with only one steering wheel at the front, and it doesn't get stuck so easily in mole holes. On our test site, he still got stuck helplessly on a tree root. Unsurprisingly, the 4th 000 m² model has a very long battery life, but even loads in 54 minutes again completely.

However, the safety aspect is critical: when you lift the Honda, the knives turn dangerously long. He is also a bit of a bully and wastes energy in idle mode (10 Watt).

The Honda HRM 3000 turns dangerously long when you lift it. Picture: CHIP

Small powerhouse: Stihl RM 422 PC

  • Source: Stihl

    Stihl RM 422 PC

    Overall grade: 1.7 (good) ; Power: 2.2; Features: 1.8; Ergonomics: 1.2; Documentation & Service: 2.6

Powerful bar mower
GPS tracking
Mode for wire break search
installation material costs extra

Der Stihl RM 422 PC is for mowing areas up to 1. 000 m² designed. Thanks to its compact dimensions, it can also cope with small plots and especially winding lawns. His bar mower gets everything he can run over. This makes it ideal for orchards. But that's why he also makes small wood out of children's toys lying around.

We liked the robot, that he can drive from different starting points. This promotes even mowing of crooked areas. He also avoids ruts by moving offset to the limit. If it is raised more often, it switches to play mode, switches the knives off completely and searches for the distance. For problem gardens, he has an anti-stucco mode with which he tries out special avoidance routines. Overall, it is very quiet. His mowing time per battery charge is a good 92 minutes, and in standby mode it uses the least energy.

There is little to complain about. For example, that the installation material costs extra, and that commissioning and documentation could be better.

If the Stihl RMI 422 Swallowing the PC, he tries to work around the problem with sophisticated evasive routines. Picture: CHIP

The Pedant: Bosch Indego S + 400

  • Indego S+ 400

    Source: Offer from

    Bosch Indego S + 400

    Overall grade: 1.7 (good) ; Power: 2.2; Features: 1.8; Ergonomics: 1.2; Documentation & Service: 2.6

Very nice mapping function
Fast loading time
Does not come coping well with changes
Short battery life

The Bosch Indego S + 400 mows as the only robot in orderly paths. It takes a long time to get used to it, i.e. three mowing cycles, to get to know and map its area of ​​work. We could not find any advantage over the chaotic model, but the device leaves lanes in the lawn. The app has a very nice mapping function that is even ideal for garden planning.

The robot only pays off in areas where the obstacles are not often to change. Because every converted garden armchair gets him out of step and he starts mapping again. With average 47 minutes its battery life is very short, but it is also after 45 Minutes already loaded and ready for the next round. The base station is very picky: it must be set up parallel to the boundary and must not be installed concealed. The robot mows at an average volume, and its hum can still be heard from a distance of ten meters. And with his rotary mower, he leaves unusually clear injuries to toys.

The Indego rotary mower can be quite rough. Picture: CHIP

For the city garden: Gardena Smart Sileno City 500

  • smart Sileno city 500 Set

    Source: offer

    Gardena Smart Sileno City 500

    Overall grade: 2.0 (good) ; Performance: 3.9; Features: 2.2; Ergonomics: 1.2; Documentation & Service: 1.0

Will cope with tall grass despite compactness
Compatible with Gardena -Smart system
Very quiet
Overall performance sufficient

The Gardena Smart Sileno City is small and agile and is on 500 m² laid out. Despite its supposed slowness, it can also cope with calf-high vegetation, as it has impressively shown in the test. It just takes time. It integrates seamlessly into the Gardena Smart system. Then he aligns his work according to the specifications of the rain and soil moisture sensor and the irrigation.

Thanks to the extra guide cable, he masters narrow corridors, can be quickly sent to distant starting points at the start and, above all, quickly finds his way back to the charging station when his battery is running low . In addition, it is whisper-quiet and does not bother the neighbors even when they are having an afternoon nap. Should it still make a loud hum, it is time to clean the undersurface of the grass and replace the blades. Replacement blades are included.

For areas that the Sileno does not automatically work well, it can be carried manually. With the “Precise Mowing” or “Spot Cutting” function, he mows this section of lawn in a spiral. A useful function for hard-to-reach places such as under a trampoline or garden furniture. This saves tedious rework.

It takes a while in the calf-high grass, but sooner or later the Smart Sileno will also get this growth small. Picture: CHIP

The Modular: Worx Landroid S 300

  • Landroid S300 - WR130E

    Source : Offer from

    Worx Landroid S 300

    Overall grade: 2.1 (good) ; Power: 3.6; Features: 2.0; Ergonomics: 1.1; Documentation & Service: 3.4

Expandable with GPS, GSM and ultrasound
User-friendly app
removable battery
Very long charging time
Unreliable Charging contact
Very aggressive without ultrasonic module
Seven-segment display not up to date

The Worx Landroid S 300 is with his 300 m² area well suited for small gardens and thanks to its low price at good overall performance, it is also our price-performance winner. Its specialty is its modularity: it can be equipped with additional GPS, GSM and ultrasonic sensors. The app is very clear and tidy. The use of the robotic lawnmower can even be based on the weather forecast. It also offers a removable battery that is compatible with the Worx power tools.

But its charging time is miserably long: 250 minutes it takes to be operational again. Especially at the beginning of the season, it is therefore advisable to always have a charged removable battery, e.g. from a Worx cordless screwdriver. A separate charger for the battery is unfortunately not included. In addition, the charging station only connects to the mower via a spring contact. A light push against it is enough to interrupt the current flow.

Without optional ultrasonic sensor, it behaves very rough. Its housing is not suspended swinging. Therefore, he only recognizes obstacles when they offer him solid resistance. He knocks over the coffee pot on the garden table.

Compared to the great app, the Worx on the control panel with its seven-segment display is almost ancient. It only outputs cryptic number codes and letter combinations. This robotic lawnmower can only be operated properly with the app.

If you have a Worx tool at home, you may have a suitable replacement battery for the robotic lawnmower. Picture: CHIP

The bully: Robomow RC 312 Pro S

  • RC312 Pro S schwarz/grün

    Source: offer

    Robomow RC 312 Pro S

    Overall grade: 2.4 (good) ; Power: 4.1; Features: 2.0; Ergonomics: 1.8; Documentation & equipment: 2.3

Reasonable app with voice control
Rain sensor
Very aggressive
Segment display not up to date
Knives rotate for a long time
High energy consumption in idle

For Robomow RC 312 Pro S, the app and the rain sensor are the most positive things that can be mentioned. With its star-shaped mower, the Robomow knows no mercy and cuts down everything that gets under its wheels. Therefore, it is more suitable for rough terrain. Because its shock sensor is also very insensitive. He roughly pushes garden furniture or a child's foot aside. The knife of the Robomow RC 312 Pro S rotates dangerously long after. The segment display on the device only provides cryptic numerical codes that cannot be understood without a manual. On the other hand, it can be operated conveniently via its app.

Robomow only communicates via Bluetooth. An advantage for careful natures who shy away from manipulating the robotic lawnmower through the Internet. At the time of testing, there were Alexa skills for Robomow. The operation with it is currently still on a very infantile level. With an energy intake of 10 Watts in sleep mode Robomow must also urgently work on its energy management.

With its ludicrous nature, the Robomow makes rough holes in the toy. Picture: CHIP

The outdated: Kärcher RLM 4

  • Source: Kärcher

    Kärcher RLM 4

    Overall grade: 2.9 (satisfactory) ; Power: 3.5; Features: 1.7; Ergonomics: 4.1; Documentation & Service: 2.1

No app
Very loud
Unstable connection to the charging station

The experience with the Kärcher RLM4 can be summarized as pre-Flood. Simply because of the lack of an app connection, it is not even recommended as a bargain. But it is rarely a bargain, as a rule the price is very high. After all, it offers a rain sensor.

The robot rumbles across the meadow like an old vacuum cleaner, making it the loudest in the test. The charging station does not establish a fixed mechanical connection to the robotic lawnmower. He only leans against two spring contacts for charging. A small mechanical shock is enough to interrupt the power supply.

Where other, and also cheaper, models offer a convenient app, m Set the Kärcher RLM4 completely on the display. Picture: CHIP

This is how CHIP tests robotic lawnmowers

We're examining and evaluate the robotic lawnmowers in the categories of mowing performance, features, ergonomics as well as service and documentation. Our test area on the Alm measures around 250 m². An angled floor plan, two closely spaced fruit trees and slopes up to 35 degrees offer robotic lawnmowers a challenging course.

Mowing performance (35 percent)

Using GPS, we record the mowing path of the test candidate. Each robotic lawnmower is sent to the pasture three times. Divided by the battery life, this gives the average mowing performance.

Ergonomics (35 percent)

The knife must stop immediately when the mower is raised. Other important parameters are understandable documentation, a clear menu structure and an individually configurable mowing plan. An app for remote control brings additional points, but only if it works correctly.

Furnishing (30 percent)

Adjusted to the maximum mowing area, sufficient boundary wire and fixing nails should be included, as well as a distance gauge as well as replacement blades and other wear parts . We honor rain sensors, theft protection and long warranty periods.

Sketch of the mowing plot with all baffles and facilities Picture: CHIP

Advantages of robotic lawnmowers: gentle on flora and fauna

Also the Animal roommates in the garden benefit from the use of robo lawnmowers, provided that the frequency and cutting length are not exaggerated. With a robotic lawnmower shrugging across the meadow, nectar-gathering flower visitors have enough time to escape and from a cutting height of five centimeters, reptiles are also protected from cutting injuries. Even the much-quoted hedgehog does not have to become a robot victim if the electrical device is only used during the day and has a rotary mower with short blades.

A wide edge strip and some flower islands also promote ecology in the green living room. Both are easy to set up using the perimeter wire – a robotic lawnmower keeps to its limits more reliably than any family member. Bees in particular will thank you if you wait until the meadow blooms for the first time before using it for the first time. Even if the manufacturers are very cautious, a seventeen-year test experience has shown that even small robotic lawnmowers can cope with knee-high grass, you just have to give them some time.

Robotic lawnmowers can also get stuck. With location tracking and an internet connection, the devices can be helped quickly. Picture: CHIP

For a beautiful lawn, lawn fertilizer is also required: Read the article

What is the risk of injury to robotic lawnmowers?

If rotating Knives jerking independently across the meadow are per se a veritable source of danger. The robotic lawnmowers therefore have some passive and active safety elements. The shortest distance between knife tips and housing for all test candidates is at least 85 millimeters. All mowers are also surrounded by a circumferential bead. If you change the cutting height, the entire mower is raised or lowered, while the outer ground clearance (50 to 65 millimeter) remains the same . A foot that has been hit remains unharmed. Especially since none of the test candidates pushed up on the toddler shoe that was held for this test, but changed direction after a little pushing. Most models react very sensitively to obstacles with their shock sensors. If the shock sensor on the Stihl robot is triggered several times in quick succession, it even interprets it as child's play. He switches off his mower and searches for the distance.

If our test candidates are raised, almost all of them stop their mower immediately – only Robomow and Honda turn dangerously long. If a toy or animal is so small that it can be run over – embodied in the test by a tennis ball – there are no injuries in all devices. The severity of the injury depends crucially on the mower. Fixed knives plan whole pieces out. The small, movable blades of the rotary mowers, on the other hand, only give our rollover victim superficial cuts. In an untidy family garden, it is therefore better to use a rotary mower with short blades. On the other hand, log mowers are the right choice when it comes to shredding coarser things than grass, such as fallen branches or fruit from an orchard.

A star-shaped or bar mower chops everything short and small. Picture: CHIP

Lawn seeds in the test: The test winners of the Stiftung Warentest

Robotic lawnmower with app connection: Convenient operation

Compared to the Predecessors have become more comfortable to use with all test candidates. Individual working hours can now be set separately for each day of the week. There are also models that coordinate with the weather service or recognize rain and then prefer to stay in the base.

Almost all robotic lawnmowers now offer an understandable setting Menu in German. Only occasionally is a segment display with cryptic codes delivered, which can only be understood with the help of the manual. A blessing that most modern devices can also be configured and operated using an iPhone or Android app.

The connection between smartphone and robotic lawnmower happens either via mobile radio or via the local WLAN. The robots can then also be addressed remotely via the manufacturers' servers. For those who are not comfortable, it is better to drive with Bluetooth-exclusive models.

With all apps, detailed mowing plans can be easily set up, the robotic lawnmowers can be started, stopped or turned on Bring the charging station back. In the event of problems, the devices send more or less detailed messages to the smartphone. At Gardena, the robotic lawnmower becomes part of the Smart Garden network via the supplied gateway, in which, among other things, soil sensors, drip irrigation, sprinkling and domestic water pumps can also be integrated. The Honda can also adapt its mowing intensity to different growing periods.

After an alarm message, for example because the robotic lawnmower has been lifted up or when the stop button has been pressed, is then but again asked the physical presence. For safety reasons, a new start can only be carried out on the device. For child and theft protection, robotic lawnmowers are usually secured with a PIN.

Of course, the voice control should not be missing in smart times. At the time of testing, there were Alexa skills for Robomow, Bosch and Husqvarna, the latter also with Google Home. The operation with it is currently still on a very infantile level. An example:

  • Question: “Alexa, how is Robomow?”

    Alexa: “Robomow is doing well, he is happy that he can take care of your lawn.”

A sober status message with a specific charge status would be more useful here. But at least it usually works with the commands “Start”, “Stop” and “Return”.

Another feature that gives away potential are the headlights of the Husqvarna, which can only be switched on on the device. If the app were also available, it would be easier to find the mower in the dark. The GPS receivers also make it easier to locate, especially after theft.

The Worx app shows all relevant data very clearly and dispenses with unnecessary bells and whistles Picture: CHIP

Energy consumption and navigation: only one mower works with a removable battery

Da in In this test, robotic lawnmowers with different acreage performance are naturally also different from each other. The Honda has a measured average running time of 243 minutes the longest breath . The Bosch Indego sS + 400 on the other hand, had to be tested on average 47 minutes to his charging station. But after three quarters of an hour he is fit for the next round. The others take between one and one and a half hours to charge, depending on the battery capacity. The exception is the Worx, which for its 2 Ah battery has a long 250 Minutes needed. Conveniently, however, it is equipped with a standard exchangeable battery that also fits into other manufacturer's cordless tools. The battery of the other candidates is permanently installed and can be replaced in the specialist workshop.

During mowing, between 1.6 and 6.5 watts flow through the boundary wire. The differences are more serious, however, while the devices in the charging station are waiting for their next use. While Stihl, Bosch and Worx are content with less than one watt, the Honda also sucks 12 hours in standby mode still eleven watts from the line. The Robomow was not much better at ten watts.

Except for the Bosch, which mows train by train, all other robotic mowers continue to rely on the random principle. The evaluation of our movement records shows that they also achieve even coverage. In addition, some robots allow multiple starting points. As a result, they start grazing at certain intervals, even in more distant areas.

robotic lawnmowers have the option of automatically adapting the mowing behavior. If the resistance is increased for a short time, the better robots automatically switch to spiral mode to put down particularly unruly vegetation.

Rotary mowers with short blades leave only minor injuries on objects run over Picture: CHIP

Setup and operation

Before the electronic gardener can get started, his workplace must be set up accordingly. The base station, in which the robot is loaded and to which it loops back on the boundary wire, should generally be placed at a level location that allows the robot about two meters straight feed from both sides.

With the boundary wire you not only enclose the entire mowing area, you can also exclude problem areas such as flower discounts or the garden pond. When installing, also consider a wide field area as a shelter and food source for your animal roommates.

Our test candidates are for gradients of 27% to 40% designed. On short distances, however, they also create steeper passages, provided the terrain is dry and flatter at the turning points. Some robots even have stud tires as accessories. With the Automower 435 X AWD Husqvarna now even has a robotic lawnmower in its range that 70% steep slopes coped. He could even mow ski jumps.

Wireless alternative?

For all who shy away from the installation effort of the wire limitation, we have the L 56 DELUXE from the Italian manufacturer Ambrogio under the microscope. This robotic lawnmower has six grass sensors on its underside, with which it independently delimits its mowing area. In order for this to work reliably, however, he either needs a 35 centimeter wide strips without vegetation or 90 millimeter high obstacles. As a semi-automatic, it does not drive autonomously to a charging station. If the battery is exhausted after two hours at the latest, the device, which weighs around eight kilograms, must be carried to its power supply and charged there for a good three and a half hours. With these restrictions, the Ambrogio is only an option for very special purposes. For example, in residential complexes with several small, separate lawns that cannot be covered by a common boundary wire and transit corridors.

Husqvarna's EPOS system already seems more promising , which works with GPS support with reference station and correction signal with an accuracy of up to three centimeters. It should come this year, but is intended for professional use on sports fields, parks or industrial plants.

The Ambrogio L 60 also mows without a wire, but otherwise requires navigation aids. Picture: CHIP

Tips for buying and operating

Whether and The right robotic lawnmower for you depends on many factors. With these buying and usage tips, we would like to point out the most important considerations:

  • The recommended area by the manufacturer is a guide. Even small robotic lawnmowers can handle larger areas. You only need a little longer because of the weaker battery.
  • Corridors and secondary areas: If your garden is very winding, then pay attention to the recommended corridor width and whether it can also be used on separate secondary areas.
  • A robotic lawnmower with a separate guide wire can get to distant and angled corners more easily and return to the charging station more quickly.
  • Bar or rotary mowers: Mowers with fixed bar or star blades are the right choice for parks or orchards. You can also cope with falling fruit or branches lying around. The movable blades of the rotary mowers cut delicate stalks, but fold in on harder objects. Therefore, they are ideal for the family garden.
  • Terrain conditions: If the mowing area is very irregular or, for example, full of molehills, a robotic lawnmower can do better with two steering wheels.
  • Incline: robotic lawnmowers also master inclines larger than those specified by the manufacturer, provided the grass is dry and facing obstacles or the boundary 50 centimeters of flat terrain for turning.
  • Single-variety limitation: Use only the material offered by the manufacturer as a boundary wire. Do not mix, for example with copper residues, because the more noble metal dissolves the less noble metal under power.
  • A cheap multimeter works well as a continuity tester to find breaks in the perimeter wire. Use leftover perimeter wire as measuring leads.
  • Wait with the first use until your meadow has flowered and has provided the bees with first food.
  • Remove all objects that are less than six centimeters from the mowing surface.
  • Cutting height: Set the cutting height of the robotic lawnmower not less than five centimeters. In this way, you not only protect small pets that are swearing around, but also the turf from injury.
  • Only let the robotic lawnmower run during the day. How to protect nocturnal animals like the hedgehog.
  • Do not let the robotic lawnmower work on wet meadows when it rains.

Which robotic lawnmowers are the best?

In the test, the Husqvarna Automower cuts 315 X best off. It is well suited for all terrains and is particularly excellent in terms of equipment. But it costs around 1. 800 Euro. For significantly less money, the Worx Landroid S is in a small garden recommended. Price: round 500 Euro.

Which robotic lawnmower to buy?

Which robotic lawnmower you should buy depends on the area and the type of G kind of. Some robots can cope better with obstacles and deal more gently with the family garden, others are more suitable for orchards. The slope and the angle also play a role.

What does a good robotic lawnmower cost?

From around 500 Euro you get a good robotic lawnmower for small gardens. These can also be used on larger areas, but then also take much longer than robots that are used for 1. 000 to 4.000 m² are designed. For medium-sized gardens you should have around 1. 500 Take the euro in your hand.

How to lay boundary wire for robotic lawnmowers?

For some models you have to the boundary wire is buried a few centimeters below the surface of the earth. Often, however, the cable only has to be plugged into the ground and laid above ground. After a few weeks the cable has waxed in and can no longer be seen. Tip: Cut the grass in the laying area very briefly so that the cable is as close to the floor as possible.

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