Sileno City Gardena review, the lawn mower robot that cuts even where others can’t

Gardena is Husqvarna, Husqvarna means years and years of experience in the sector. Sileno range of automatic lawn mowers for the garden today represents one of the best solutions for its value for money, the price of which varies significantly according to the needs and dimensions of the garden. For electric cars, This difference is mainly due to the battery, which is a large part of the cost of the robot: 600 AD version2 In Sileno City it has a faster battery and charging system, because it should be able to cut an area twice the size of Sileno City 250 m2 . Apart from this, the two robots are identical, in terms of size and performance: same cutting area, same wheels, same brushless motors and same functionality, nothing really changes except for the battery and price.

The differences in the range of Gardena robots are very few, and this facilitates the choice: in addition to the size of the lawn, in some models the width of the cutting area changes and there is also a “smart” system: some robots can be connected to a phone via Bluetooth, while in “smart” devices their price is much higher , There is also a gateway for Wi-Fi connection.

The intelligent system is much more than a simple portal: the “smart” bot also has a card inside with a dedicated processor that enables some advanced mapping functions, guided by a system called Luna Intelligence. somewhat similar to home robots, which using computer vision and lidar are able to map rooms allowing different areas to be identified, Thanks to Lona Intelligence, Gardena Smart also has a similar management via the app, the garden map.

The version we tested is the City 300 with Bluetooth, more affordable: 699 euros. Some advanced functions are also present in ours, such as CorridorCut, which allows passage and cutting of narrow spaces and Spotting, a spiral cutting pattern that facilitates cutting of certain areas, for example those under a garden table.

There are also several sensors, such as a temperature sensor that detects, for example, frozen grass and avoids cutting, and a growth sensor that adapts the cutting time to the actual growth of the grass.

Installation is very simple, as with all robotic lawn mowers

Installing an automated lawn mower from surrounding wires can be confusing at first, but just read the instructions to realize that in the end, in less than two hours, you can do everything.

Obviously, the time varies with the size of the garden, because the longest and most boring thing is to plant the circumferential wire that marks the area the robot can’t get out of. Gardena provides a paper ruler that helps in tracing different distances, 32cm or 10cm. The last, for example, is the distance of the wire from a possible path at the same level as the grass: this way the robot walks the path with the front wheels, cutting to the edge without damaging the blades. If we wanted, from the application, we could say to go a little further, but we found it to be incredibly accurate in optimizing the edges.

If the grass and the path are at the same level, the robot with a wire placed at a height of 10 cm rises and cuts the edge perfectly

If there are obstacles over which the robot cannot climb, the wire should be kept at about 30 cm to avoid the risk of stopping the robot by taking a step. Installation may also require several adjustments, and after the first hours of operation you will immediately notice if necessary, at some points move the wire a few centimeters or closer.

The wire must be pressed with plastic wedges fitted with a grass blade: it is green, you can hardly see it and as soon as the grass grows, it almost completely disappears. With a little effort and using a small blade, it can be buried up to 10 cm deep to completely conceal it even if only in some places.

In this, Sileno City Gardena is not much different from many other robots on the market: with the exception of those with GPS, which are quite expensive, They all have the perimeter wireAnd the.

What makes the difference, for these models, is a second wire called a “guide wire”: this wire has the dual function of guiding the robot in and out of the charging base and moving the robot into hard-to-reach areas.

The guide wire comes out from the center of the charging base

Let’s explain better: Lawn mower robots can’t have the rooms as a reference, nor the ceiling when working outdoors, so while the domestic robot is able to understand where it is, thanks to the fixed references, the lawn mower robot moves on the ground according to the type of automatic path that It tries to cover the ground evenly, but without precise orientation points.

There are more advanced models that use computer vision and keep track of trees, shrubs and various elements, but in the most popular versions, those under €1,000, The movement was completely random. This means that it is really difficult for the robot to pass in a narrow space of less than 50 cm: He must enter the hole perfectly, because if he only gets close to the ocean he returns.

Not many robots have access to all specially arranged garden areas, and if it does, it won’t always. Thanks to the guide wire, Silenus can be precisely routed in even remote garden areas and separated from the main area, as long as they are connected.

If desired, if you can bring the cable to an area not connected to the garden, using an air duct for example, it is possible to manage the garden in front of the house and the back area with one unit by moving the robot by hand. Just take him to zone two, tell him to cut that zone off and he’ll do his work until the battery runs out. Of course, the comfort is lost in not having to do anything, But it can be useful for those areas that do not need constant maintenance.

The presence of a guide wire is also useful in placing the charging station: while with other robots this has to be located in a certain place, with enough space in front and behind the robot to exit, which may limit, in the case of Silenus the base can also be hidden inside a wooden house, in a certain place or in a suitable location. The robot will follow the cable for a distance that the user can select from the list before starting to cut.

Very quiet and not afraid of holes

Pulling it out of the box, one immediately realizes that the Gardena robot It is built with high quality materials. From the wheels to the plastic, they are light but very strong, and they are also well protected from water splashes. They can be kept in a garden that has an irrigation system, they can be cleaned by lifting and wet with a hose and have no problems under heavy rain, even if your gardena provides a box to protect them from UV rays and spills. rain.

On the robot, at the top, there is an LED management panel in which each option can be configured, a router installation system is also included that helps with the first configuration, where the guide wire, perimeter wire and connection are checked.

The system also has bluetooth: the first connection must be made within three minutes of turning on the bot, then once it’s paired, just open the app and connect to the bot. Through the application you can organize all the functions also present in the small top panel, obviously in a simpler, more immediate and more visible way.

His main job is still to cut the lawn, and after two weeks we can only be completely satisfied with the work done. in one pass per day except for Sundays, In less than two hours, the robot maintains a garden of 180 square meters at an ideal level, cutting 5 cm.

The height can be adjusted with an inside knob, but the lawn should ideally be under four, not the one we used for testing. While cutting, the robot is very silent, and you only hear very slight noises as it cuts if you are at close range, but even when using it at night it is almost imperceptible.

The three blades are in the lower area

The choice to put two large wheels in front, accompanied by a very wide rear wheel, proved to be a winner: despite having many holes in the lawn to eliminate weeds, Within two weeks of use, he has never sprinted once, and has always been back to base on his own.

The fairly high structure allows it to pass with the rear wheel on holes up to 3/4 cm and get out of it without problems. If you keep the cable 10cm from a flowing driveway, it can also go down the driveway with one wheel on the grass and one on concrete that cuts the edge, however it can’t do that if the edge is close to a large obstacle: the position of the cutting blades, three, central and this This means that next to the walls there will always be 5/10 cm of grass to be finished with an edge trimmer.

Regarding the running cost of the 300sqm city model we tested, not currently listed on the Gardena website (there are 250sqm and 600sqm) We calculated the consumption for recharging the battery and for running the surrounding wire of about 60 watts per day, which means in a month of continuous daily use about 1.6 kWh of energy consumed. Obviously, it all depends on how long you turn it on: if the battery is almost exhausted almost every day and the lawn is mowed every day, the consumption rises to 2.5 kWh, which is still insignificant even with the high price of energy: 1 euro each Month.

Interesting is the possibility to activate the energy saving mode, which turns on the surrounding casing and the guide wire only in the event of a programmed cutoff, which allows you to save about ten watts per day.

A little robot that does a really cool job

Sileno City Gardena is able to do practically everything that is required of a robot well, except for cutting edges along the surrounding walls where they leave a 10 cm band. Unfortunately, even models that have a long cut at the edges today can’t eliminate every tuft of grass, and a little manual work of finishing once a week is necessary.

We are facing a very silent robot, 57 dB(A) which also works well in a meadow that doesn’t have to be as smooth and regular as a pool court. The pilot wire may be the reason for choosing this model over other systems on the market: the base can be placed anywhere and the robot can also go through very narrow lanes following this cable, which is not always given.

Silenus base can be placed in a convenient place, and the robot comes out thanks to the guide wire

The price varies according to the models: on the Internet, the 300 m² version, ideal for most homes with small gardens, is sold for 699 euros with everything you need for installation from the inside: 150 m of cable, pegs, connections and instructions.

There is also an extra cover, which is mounted on top of the base which isn’t very cheap: it’s not necessary, it’s something that can help preserve the color of ABS which can discolor over time with UV rays.

We point out that the versions for sale on Amazon Warehouse at a much lower price, around 500 euros, were reported as “Small cosmetic defects on the top, front, or side of the item“But they actually get home as if they are all newstill fitted with all protective plastic materials and accessories.

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