Best Stihl Robotic Mower of 2026
Stihl’s robotic mowers offer German engineering and reliable cut quality for medium to large lawns. We’ve compared the full 2026 lineup to help you choose the right model for your garden.
Quick answer
The Stihl iMow 632.0 is the best overall for large lawns thanks to its 1:4 slope handling and 1.25-acre capacity. For smaller gardens, the Stihl iMow 422.0 offers the same build quality at a lower entry price.
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Research updated June 2026.
Stihl iMow 632.0
Best for large lawns with steep slopes
| Product | Best For | Max Area | Slope Rating | Rating |
|---|---|---|---|---|
| Stihl iMow 632.0 | Large lawns, steep slopes | 1.25 acres | 45% | 4.6/5 |
| Stihl iMow 422.0 | Medium lawns, value | 0.75 acres | 35% | 4.4/5 |
| Stihl iMow 532.0 | Medium-large, extra features | 1.0 acres | 45% | 4.5/5 |
| Stihl iMow 322.0 | Small lawns, entry level | 0.5 acres | 35% | 4.3/5 |
| Stihl iMow 732.0 | Large lawns, smart features | 1.5 acres | 45% | 4.7/5 |
What to Look for in a Stihl Robotic Mower
Stihl’s iMow series is built around a modular platform. All models use the same cutting deck design and blade system, meaning cut quality is consistent across the range. The key differences are battery capacity, slope handling, and smart features.
Max area rating is the most important spec. Stihl rates each mower for a maximum lawn size based on typical grass growth. If your lawn is larger than the rating, the mower may run out of battery before finishing. Slope handling is also critical. The 632.0 and 532.0 handle 45% slopes, while the 422.0 and 322.0 are limited to 35%.
Mistakes to Avoid When Buying
Don’t buy a mower with a max area rating too close to your actual lawn size. If your lawn is 0.7 acres, the 422.0 (rated for 0.75 acres) will struggle during peak growth. Step up to the 532.0 or 632.0 for a buffer.
Avoid ignoring the boundary wire installation. Stihl mowers require a perimeter wire, and complex gardens with narrow paths or multiple islands need careful planning. Factor in installation time or professional setup costs.
Stihl iMow 632.0
Best Overall for Large LawnsPros
- Excellent slope handling up to 45%
- Large 1.25 acre capacity
- Quiet operation at 58 dB
Cons
- No GPS or cellular connectivity
- Boundary wire required for installation
The Stihl iMow 632.0 is the sweet spot in the 2026 lineup. It handles lawns up to 1.25 acres and climbs slopes as steep as 45%, making it suitable for most gardens with challenging terrain. Owner reviews consistently praise its reliability and consistent cut quality, even in wet grass.
It lacks the smart features of the 732.0, but for most users the manual scheduling and simple controls are more than adequate. The 18V lithium-ion battery provides enough runtime for a full mow on a standard lawn, and the automatic charging station means it returns to dock without intervention.
Stihl iMow 422.0
Best Value for Medium LawnsPros
- Lower entry price than 532.0/632.0
- Same cutting deck as larger models
- Easy to install and program
Cons
- Limited to 35% slopes
- No app control or smart features
The 422.0 is the most popular Stihl robotic mower for a reason. It covers up to 0.75 acres, which suits the average UK and US lawn, and uses the same 22 cm cutting deck as the flagship models. Build quality is identical, with the same weather-resistant housing and robust wheels.
Owner feedback highlights its quiet operation and reliable boundary wire following. The main limitation is the 35% slope rating, so if your lawn has steep banks, consider the 532.0 or 632.0. For flat to gently sloping lawns, the 422.0 delivers excellent value.
Stihl iMow 532.0
Best for Medium-Large Lawns with FeaturesPros
- 45% slope capability
- 1.0 acre capacity
- App control via Stihl Smart
Cons
- Price premium over 422.0
- App connectivity can be finicky
The 532.0 sits between the 422.0 and 632.0 in the lineup. It offers the same 45% slope handling as the 632.0 but with a slightly smaller 1.0 acre capacity. The addition of Stihl Smart app control allows scheduling and monitoring from your phone, a feature missing on the 422.0.
Owner reviews note that the app works well once connected, but initial pairing can take a few attempts. The mower itself performs identically to the 632.0 on slopes and cut quality. If you need app control but don’t require the full 1.25 acre capacity, the 532.0 is a strong middle option.
Stihl iMow 322.0
Best Entry-Level for Small LawnsPros
- Lowest price in Stihl range
- Same cut quality as larger models
- Compact and easy to store
Cons
- Only 0.5 acre capacity
- No app or smart features
The 322.0 is Stihl’s entry point into robotic mowing. It’s designed for smaller lawns up to half an acre and shares the same 22 cm cutting deck found on all iMow models. Build quality is identical to the more expensive units, with the same weather resistance and durable chassis.
Owner feedback is positive for small gardens, with users noting it handles narrow paths and tight corners well. The 35% slope limit is fine for most small lawns. The lack of app control is less of an issue at this price point, as the simple timer-based scheduling is straightforward to set up.
Stihl iMow 732.0
Best for Large Lawns with Smart FeaturesPros
- Largest 1.5 acre capacity
- GPS and cellular connectivity
- Full app control with scheduling
Cons
- Highest price in the lineup
- Cellular plan required for remote access
The 732.0 is Stihl’s flagship robotic mower for 2026. It handles up to 1.5 acres and includes GPS positioning, cellular connectivity, and the full Stihl Smart app suite. This allows remote monitoring, scheduling, and even geofencing to prevent theft.
Owner reviews highlight the convenience of the app and the mower’s ability to handle very large lawns without issue. The cellular connectivity requires a data plan, which adds ongoing cost. For most users with lawns under 1.25 acres, the 632.0 offers similar performance at a lower price.
FAQs
Do Stihl robotic mowers work on wet grass?
Stihl iMow mowers can handle damp grass, but very wet conditions may cause clumping. It’s best to mow when the grass is dry.
How long does the battery last on a Stihl iMow?
Battery runtime varies by model, but typical mowing time is 60-90 minutes before returning to the charging station.
Can Stihl robotic mowers handle steep slopes?
Yes, the 532.0, 632.0, and 732.0 handle slopes up to 45%, while the 322.0 and 422.0 are limited to 35%.
Do I need to install a boundary wire?
Yes, all Stihl iMow models require a perimeter wire to define the mowing area. Installation is straightforward but takes time.
Are Stihl robotic mowers quiet?
Yes, they operate at around 58 dB, which is quieter than a standard conversation and suitable for noise-sensitive areas.
Can I control a Stihl iMow with my phone?
The 532.0 and 732.0 offer app control via Stihl Smart. The 322.0, 422.0, and 632.0 use a manual control panel.
What is the warranty on Stihl robotic mowers?
Stihl offers a 2-year warranty on iMow models, with extended coverage available through authorized dealers.
How do Stihl mowers handle narrow paths?
The 22 cm cutting width allows them to navigate paths as narrow as 80 cm, but complex gardens need careful wire placement.
Can Stihl iMow mowers be used on multiple lawn zones?
Yes, you can create multiple zones with the boundary wire, but the mower must be manually moved between them.
Are replacement parts easy to find for Stihl iMow?
Yes, Stihl has a wide dealer network, and blades, wheels, and batteries are readily available online and in stores.
Our verdict
The Stihl iMow 632.0 is the best overall choice for most buyers, offering the ideal balance of capacity, slope handling, and price. For smaller lawns on a budget, the Stihl iMow 422.0 delivers the same build quality and cut performance at a lower cost.