Robot lawn mower for slopes & large gardens: how to find the right model
A robot lawn mower for a slope or a large garden has to do two things reliably: handle inclines and cover enough area per battery charge. This guide shows how to estimate your garden's slope correctly in percent, how much area is realistically possible per charge, and when the TerraMow V600 is enough – or when the larger V1000 is the better choice.
Step 1: estimate your garden's slope correctly
Depending on the source, slopes are given in degrees or in percent – which often causes confusion. The conversion is simple: percent = tangent of the angle × 100. Both TerraMow models handle up to 18°, i.e. around 32.5% slope. For orientation:
- 10° corresponds to about 18% – a gentle garden slope.
- 15° corresponds to about 27% – a noticeable but common slope.
- 18° corresponds to about 32.5% – the upper limit for TerraMow V600 and V1000.
- 20° corresponds to about 36% – the point at which most consumer robot mowers reach their limit.
You can measure it yourself without tools: hold a 1-metre board horizontally against the slope and measure how many centimetres the lower end floats above the ground. 30 cm over 1 m length is roughly a 30% slope. If your steepest section is below about 32%, it is suitable for the TerraMow.
Step 2: plan area & mowing rate
For large gardens, what matters is not only the raw square-metre figure, but the area per battery charge and the mowing rate per hour. After running low, the robot returns to the station on its own, charges and continues – so it doesn't have to do everything in one run. What matters is that it comfortably covers the total area over the week.
| Criterion | TerraMow V600 | TerraMow V1000 |
|---|---|---|
| Recommended lawn area | up to 600 m² | up to 1,200 m² |
| Area per battery charge | 130–250 m² | 160–300 m² |
| Mowing rate | solid for terraced-house gardens | 80–120 m²/h |
| Max. slope | 18° / 32.5% | 18° / 32.5% |
| Navigation | TerraVision™ AI camera | Tri-AI Vision (TerraVision™) |
| Price (net) | 899 € | 1,199 € |
Rule of thumb: up to around 600 m² and with one or two connected lawn areas, the V600 is enough. From about 600 m², with several separate sub-areas, or if you want to mow particularly quickly, the V1000 plays to its strength with a higher area rate per charge.
Step 3: why camera navigation wins in sloped and tree-filled gardens
Large gardens are rarely open lawns – there are usually trees, shrubs, terraces and winding corners. That is exactly where RTK robot mowers are weak: the satellite signal drops out under tree canopies, along house walls or on overgrown banks, and the robot stops. TerraMow instead navigates purely visually via camera and AI. There is no satellite signal that could be blocked – the camera "sees" the way even under trees and on a slope. For a detailed comparison with RTK and wire, read the guide Robot lawn mower without boundary wire and without RTK.
On the slope itself, traction is additionally decisive. Avoid tackling steep sections on wet grass – slippery ground reduces the grip of any drive type. On very steep banks beyond 32%, we recommend a short consultation first, so you don't buy a model that hits its limit.
Frequently asked questions (FAQ)
What slope can the TerraMow robot mower handle?
TerraMow V600 and V1000 handle inclines up to 18°, which corresponds to around 32.5%. Gentle to moderate slopes, as found in many gardens, are no problem. On very steep or wet, slippery banks, traction can reach its limits.
How do I convert degrees to percent of slope?
Percent = tangent of the angle × 100. 18° corresponds to approx. 32.5%. Rough rules of thumb: 10° ≈ 18%, 15° ≈ 27%, 20° ≈ 36%. A 30% slope therefore rises by 3 m over a length of 10 m.
Which robot mower for which lawn area?
The TerraMow V600 is designed for lawns up to 600 m² and manages 130–250 m² per battery charge. For larger or heavily divided gardens up to 1,200 m², the V1000 with 160–300 m² per charge and 80–120 m²/h is the better choice.
Is a camera robot mower more reliable on slopes than RTK?
On a slope, traction is the main factor. For navigation, camera vision beats RTK where trees or vegetation on banks block the satellite signal – the camera simply keeps seeing, while RTK systems can stop.
Conclusion
A robot lawn mower for slopes and large gardens is the right choice when the incline (up to approx. 32%) and the area per charge match your plot. With TerraMow's camera navigation, the typical RTK signal problems under trees and on banks also disappear. Read on: V600 · V1000 · Costs & power consumption · all guides.
View TerraMow V600 View TerraMow V1000