Gardena SILENO Life 750 Robotic Lawnmower (Bluetooth App Control, Up To 750m²)

What size garden is this mower suitable for?

This mower is rated for lawns up to 750m². That's a medium-sized garden. The boundary wire included in the box is 250m long which gives you enough to mark out the perimeter of a lawn this size. If your garden is smaller it will simply work more efficiently and finish faster before returning to its charging station.

Does it come with everything needed for installation?

Yes. The box includes the mower itself, 250m of boundary wire, 300 pegs/hooks, 4 connectors, 5 terminals, a charging station with UK plug and an English user manual. You will need to install the boundary wire around the perimeter of your lawn before the mower can operate. This takes time but is a one-off task. Some buyers choose to bury the wire slightly below the surface so it sinks into the lawn over time and becomes invisible.

How steep a slope can it handle?

It can handle gradients up to 35%. This is above average for robot mowers in this price bracket. The large grippy wheels provide traction on wet grass as well as dry. If your garden has terraced sections or a sloped bank this mower should manage them without difficulty. Customer reviews confirm good performance on inclines even in damp conditions.

How loud is it during operation?

The operating noise level is 57dB. A normal conversation between two people is roughly 60dB. This makes the mower very quiet in practice. You can run it while people are in the garden without it being intrusive. It can also operate early in the morning or in the evening without disturbing neighbours. The silent drive motor is a key part of the design.

Does it work in the rain?

Yes. It is designed to operate in any weather including rain. There is a rain sensor built in. Some buyers prefer to let it run in all conditions while others adjust settings based on preference. The unit itself is weatherproof so leaving it outdoors is fine. One reviewer noted it cut wet grass without any problems even on its highest cutting height setting.

How does the Bluetooth app work and what can you do with it?

The app is the Gardena Bluetooth app and it works within a 10m range of the mower. Online registration is required. Through the app you can control mowing schedules, adjust settings and monitor the mower. The app also allows you to adjust how far over the boundary wire the mower cuts - in 1cm increments - which helps reduce the amount of manual edge trimming needed. Note that some advanced app features may require an optional gateway for Wi-Fi connectivity beyond the 10m Bluetooth range.

Is it safe around children and pets?

Two sensor systems protect people and animals. Collision sensors detect when the mower hits an obstacle and it reverses and changes direction. Lift sensors are arguably more important - the moment the mower is picked up or tilted the blades stop immediately. This is a critical safety feature. The mower also has a four-digit PIN code so it cannot be operated by anyone who doesn't know the code. As with any garden machinery it is sensible to keep young children away from it while it is running.

How much does it cost to run and how often does it need charging?

Energy consumption is just 2.5kWh per month. At current UK electricity rates that is a very low running cost compared to a petrol mower or even a corded electric mower used weekly. The mower returns to its charging station automatically when the battery runs low and then heads back out to continue the job. It does not collect grass clippings - instead it mulches fine cuttings back into the lawn. Because it mows frequently the clippings are tiny and disappear into the grass within hours.