Robotic lawn mower test results explained

This guide explains how robotic lawn mowers are tested, what common test criteria actually measure and, just as importantly, what the results do not tell you. By understanding factors such as cutting quality, area capacity, slope capability, obstacle handling, safety and noise, you can properly evaluate published tests and consider how relevant they are to you and your garden.  

This page does not rank or recommend specific robotic lawn mower models, or reproduce third-party test scores. Instead, it helps you understand what test results mean, so you can use them as a basis for your choice. 

Who tests robotic lawn mowers? 

National consumer organizations 

Consumer organisations are typically funded through subscriptions and usually purchase products anonymously. They tend to test multiple models using a published methodology and controlled conditions, making results relatively easy to compare and repeat. 

Technical and trade testing institutes 

Technical institutes usually carry out commissioned testing funded by a manufacturer, industry organisation or other client. Tests may cover one or several units and follow defined standards or protocols, supporting repeatable measurements. Whether the full methodology is publicly available varies. 

Magazine and specialist media tests 

Specialist publications generally fund tests through their editorial operations and may test a smaller selection of mowers. Their methods and level of detail vary, and faster test cycles can make results less repeatable between publications. 

Creator and long-term owner reviews 

Creators and owners usually test one or a few mowers, often using products they have bought themselves or received for review. Their experiences can provide valuable insight into everyday use over time, but conditions and methods are rarely standardised, so results can be difficult to repeat. 

Manufacturer testing 

Manufacturers fund extensive testing of their own products throughout development and validation, often across many units and conditions. This can provide a large and highly repeatable dataset, although detailed internal methods are not always published. Because the manufacturer is testing its own products, results should also be considered in light of that clear commercial interest.

Cutting quality and finish

Cutting quality measures how evenly and consistently a robotic lawn mower cuts the grass, including cutting-height accuracy and the overall finish it leaves behind. It matters if you want your lawn to stay neat and uniform throughout the mowing season. Tests typically assess the lawn after repeated mowing under defined conditions, looking for uneven areas, missed grass and variations in cutting height. A good result indicates an even, consistent finish. It does not guarantee the same result with different grass species, wet grass or periods of unusually fast growth. 

What gets tested, and what each result means 

Area capacity and mowing efficiency 

Area capacity and mowing efficiency indicate how effectively a robotic lawn mower can maintain a specified lawn area over a given period. This matters because two lawns with the same area in m² can require different amounts of mowing depending on their layout. Testing can consider how much ground the mower covers, how efficiently it navigates and how charging affects mowing time. A good result shows that the mower can maintain the stated area efficiently under the test conditions. It does not show exactly how it will perform on a fragmented lawn, through narrow passages or around numerous obstacles. 

Slope and traction performance? 

Slope and traction testing assess a robotic lawn mower's ability to climb, descend and maintain grip on gradients. This is a key consideration when your garden includes sloping areas where the mower needs enough traction to mow reliably without slipping or becoming stuck. Tests generally use gradients with a defined steepness, expressed as a percentage (%) or in degrees. For example, Husqvarna Automower® 435X AWD NERA has a maximum slope performance of 70%. A good result shows controlled, reliable operation on the tested gradient. It does not necessarily predict performance on wet, uneven or soft ground.  

Boundary accuracy: wire, satellite/RTK and camera-assisted systems 

Boundary accuracy measures how closely and consistently a robotic lawn mower follows the boundaries of its designated working area. This matters around lawn edges, flower beds, paths, and other areas where accurate navigation helps keep the mower where you want it. The test method depends on the navigation system and may assess physical boundary wires, satellite/RTK positioning or camera-assisted navigation. A good result means the mower repeatedly stays within the defined test boundary. It does not guarantee the same accuracy in every garden, particularly under dense tree cover or beside tall buildings, where positioning conditions can differ for satellite-based systems. 

Obstacle detection and avoidance 

Obstacle testing evaluates how reliably a robotic lawn mower can detect and avoid objects in its path instead of running into them. For example, Husqvarna Automower® 430V NERA uses AI vision technology and a camera to avoid objects. This matters in gardens where toys, furniture, tools and other objects may sometimes be left on the lawn. Tests generally place selected objects in the mower's path and record whether it detects and avoids them. A good result demonstrates reliable avoidance of the objects and conditions included in that particular test. It does not always prove that the mower will detect every possible obstacle, especially objects that are thin, small, moving or different from those in the test set. 

Edge and corner performance  

Edge and corner testing measures how much grass a robotic lawn mower leaves uncut around lawn boundaries and in hard-to-reach areas. This matters if you want to minimise manual trimming after mowing. Tests can assess the remaining uncut strip along different edge types and how effectively the mower reaches corners. A good result means less grass is left behind under the tested conditions. It does not guarantee the same finish along every border, as walls, raised edges, paths and irregular boundaries can lead to different results. 

Rain and wet-grass behaviour 

Rain and wet-grass testing examines how changing conditions affect mowing, traction, and mowing results. This matters because wet conditions can change both how the mower moves and how grass behaves during cutting. Tests may compare operation and cutting performance under defined dry and wet conditions. A good result indicates reliable performance when mowing during and after rain. It does not show how the mower will behave at every level of rainfall, or across different combinations of wet grass, soil and slopes. 

Noise 

Noise testing measures the sound a robotic lawn mower produces during operation, typically expressed in decibels (dB(A). For instance, Husqvarna Automower® R6V has a perceived sound level of 63 dB(A). This is relevant when mowing near home, neighbours, or other areas where operating noise may be noticeable. Tests measure sound under specified conditions and using a defined measurement method. A lower measured noise level indicates quieter operation within that test.  

Safety 

Safety testing examines how a robotic lawn mower responds to situations that could create a risk, including lifting, tilting and contact. This is essential because robotic mowers operate autonomously in gardens where people, pets and wildlife may also be present. Tests can assess features such as whether the blades stop automatically when lifted and how quickly this happens if the mower is lifted or tilted. A good result demonstrates that the tested safety functions perform as required under the specified conditions. It does not predict every unpredictable interaction with children, pets, or wildlife, so always follow the mower producer's safe operating guidance.   

Battery, charging and energy consumption 

Battery and charging tests assess how a robotic lawn mower uses energy while mowing and how it manages charging between mowing sessions. This matters because charging behaviour and energy use contribute to how efficiently the mower can maintain its working area. Testing may measure operating time, charging time and energy consumption under defined conditions. A good result means efficient, reliable battery and charging performance under test conditions. It does not provide an exact prediction for every garden, as terrain, grass growth, temperature and lawn layout can affect energy use. 

App setup, control and connectivity 

App and connectivity testing shows how easily a robotic lawn mower can be set up, controlled and monitored through its app and connected functions. This becomes particularly relevant if you want to manage and monitor your mower mainly through the app, including when you are away from home. Tests may assess setup time, connection stability and the reliability of controls under defined conditions. A good result indicates a straightforward and stable experience during the test period. It does not guarantee long-term app performance or how future software and firmware updates may affect the experience. 

Durability, serviceability and parts availability 

Durability and serviceability tests consider how well a robotic lawn mower is designed to withstand continued use and how practical it is to maintain or repair. This matters because a robotic mower is expected to operate regularly over many mowing seasons. Testing may examine construction, wear, maintenance requirements, repair access and the availability of replaceable components or spare parts. A good result suggests that the mower performs well against the particular durability or serviceability criteria being assessed. It cannot predict the exact service life of an individual mower, which depends on usage, conditions, maintenance intervals and other factors. 

Why two tests can reach different conclusions

Two tests can reach different conclusions about the same robotic lawn mower without either being wrong. Lawn conditions such as terrain, moisture, slopes and obstacles can affect performance. At the same time, different scoring weights mean that cutting quality, navigation, noise or other criteria may contribute differently to the overall result. Results can also vary because tests use different firmware versions, sample sizes or market variants of the same model. When comparing results, check when and where the mower was tested, which version was used, and how the test was carried out.

How to apply a test result to your own lawn

Test results describe performance under specific conditions. Before applying them to your own garden, consider:

• How large is my lawn, and is it one open area or divided into several sections?
• Is my lawn flat, or does it include slopes or uneven ground?
• Are there narrow passages, trees, buildings or other features that could affect navigation?
• What types of obstacles are normally found on my lawn?
• How important is edge cutting and the amount of manual trimming required?

Explore our wire free robotic lawn mowers for boundary wire-free mowing, or compare all robotic lawn mowers to find the solution that best suits your garden.

If you are ready to explore models by lawn size, discover our recommendations for robotic lawn mowers for large lawns or find the best robotic lawn mowers for small lawns.

Already decided on a wire free model? Follow our wire free robotic lawn mower installation guide to understand how installation works, or learn how Husqvarna EPOS® enables precise satellite-based navigation without physical boundary wires.