Question
Which Gardena robot mowers work without a boundary wire?
Two of Gardena's current UK models are wire-free: the GARDENA smart SILENO free and the GARDENA smart SILENO sense. The GARDENA SILENO minimo, GARDENA SILENO city and GARDENA SILENO life all need a boundary wire, even the versions with LONA mapping.
The two wire-free models take different approaches:
- SILENO free: satellite RTK positioning, with no antenna or beacons to install. It connects through the smart Gateway and your home broadband rather than a SIM. Gardena rates it for 1,200 m² and quotes about 140 minutes per charge. Obstacle sensing needs the optional radar accessory.
- SILENO sense: satellite RTK plus a camera with object recognition, and a built-in SIM with free lifetime data according to Gardena. It's rated for 600 m², mows for about 40 minutes per charge and only works in daylight.
As a rough guide, the free suits a larger, open lawn with a clear view of the sky, and the sense suits a smaller lawn near buildings or trees, or one where toys and pets are often on the grass. Neither has an anti-theft alarm listed.
Our wire vs wire-free guide explains what you gain and lose by dropping the wire.
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