RoboMower RL850 Robotic Lawnmower
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Robotic lawnmower

Item #: 10328F

$1,999.00
Friendly Robotics RoboMower RL850 - - RoboMower® robotic lawn mower for people who want a beautifully manicured lawn effortlessly. RL850 is designed for lawns up to 10,800 sq ft. These lawns typically require traditional 52 cm mowers. (For larger lawns, see model RL1000 in Related Products area at right.)

Now you can do the things you really want to do (read the paper, sleep late, play golf) while RoboMower mows your lawn for you. RoboMower is the ultimate lawn maintenance tool: it mows the lawn completely by itself. All you have to do is press the GO button. RoboMower even mulches the grass and eliminates the need to collect the clippings. Safe, quiet, and environmentally friendly (no gas, no oil, no emissions).

RoboMower gives you a healthy lawn, too. Within each mowing session, RoboMower cuts the grass in several directions, resulting in a healthier lawn. And thanks to the mulching system, most valuable nutrients will return back to your lawn.

Automatic mowing and an optimal combination of cutting parameters (blade speed of 5800 RPM and driving speed of 0.5 meter/sec) result in a high quality of mowing and homogeneous beautiful-looking lawn.

  Important things to know before you order RoboMower      (1) RoboMower RL850 works best in yards up to 1/4 acre. If your yard is larger, RoboMower may not be for you (some customers with larger yards opt to purchase multiple RoboMowers). (2) RoboMower replaces a typical walk-behind mower; RoboMower does not replace a riding mower. (3) RoboMower does not like slopes greater than 15 degrees. If more than 1/3 of your lawn is sloped, RoboMower is not for you.

Some FAQs.
How does it work and how does it know where it is going?
A small wire is pegged to the ground below the grass level around the perimeter of your lawn, a similar type of technology that invisible pet containment systems use.

This is a one-time setup and takes about as long as it does to mow your lawn one time. This wire will virtually disappear from sight in 2 to 3 weeks in normal growing conditions. This wire forms the virtual fence for the Robomower, containing it to the area you are mowing.

The Robomower uses an onboard navigation system, monitoring its position relative to the wire around the lawn. In addition, it is always aware of its current driving direction and distance traveled. This is done by means of an internal compass-like device. This device provides the data to the mower and uses this information to determine the next most efficient path for the mower to take.

Does the Robomower know where it had mowed already?
No, it does not. Its special navigation method leads it in a triangular pattern that changes directions and covers the whole plot many times. Consequently, every square foot of the plot, unless it is too large for one operation, will be mowed from six to eight different directions, providing a fine groomed "carpet" appearance once done.

How long will it take to mow my lawn?
In general, Robomower takes from 2 to 3 times longer to mow than a walk-behind mower does. However, since you are not doing the pushing, the extra time should not be a concern. Generally, a setup will consist of one plot for the front yard and one plot area for the back yard. The side yards are often included with either the front or the back. For best results on average lot sizes, where the lot size is from 1/3 to 1/2 acre, one power pack operation is used to cut one plot and a second operation is used to cut the second plot.

How will RoboMower work with obstacles such as trees and rocks?
If the object is rigid and at least 6" tall, the mower simply bumps into it and change direction. Other areas, like a flowerbed or swimming pool, are excluded from the cutting area by using the same wire as installed on the perimeter. The object is simply looped out during setup of the perimeter wire. The inbound and outbound leads of the wire used to loop out the object are installed right next to one another. This arrangement causes the signal in this section of the wire to cancel, allowing the mower full access around the obstacle, but keeping it out of the area excluded.

What is the life of the power pack?
When properly maintained, two to three years/seasons on average.

Will Robomower work with an invisible pet containment system?
The Robomower has been tested with several systems, with little or no adverse effect. Worse case scenario from the manufacturer's experience is that the pet must be moved out of the area being cut, which is of course a normal safety precaution.

RL850 has 2 mowing modes, automatic and manual, and is recommended for lawns up to 10,800 sq ft.

  • Suitable for any grass type.
  • Mowing height: 6 settings at the front and 2 at the rear. High cut blade 1.75" to 3.25". Low cut blade 1" to 2.5".
  • Average area covered on a single charge is 5400 sq ft; charging time is approximately 20 hours.
  • Average work time is 3 hours.
  • Patented triple-chamber mulching system.
  • 3 blades and a total cutting width of 21".
  • Knobby drive wheels (recommended for lawns with high grass, sloping area, and bumpy ground).
  • Noise level: -85 db measured; -90 db guaranteed.
  • Durable in all weather conditions and UV protected.
  • LCD display panel with easy-to-use menus.
  • Mowing power: 5.5 HP equivalent.
  • Mowing motors: 3 x 150 watt motors.
  • Exclusive Drop and Go 24-volt batteries.

    Safety features: automatic operation, Child Guard, perimeter switch, lift sensor. Automatic operation means RoboMower is self-operated without user interference. Child Guard helps prevent children from operating the RoboMower. RoboMower cannot operate in automatic mode if Perimeter Switch is off. Lift sensor stops rotating blades immediately when RoboMower is lifted.

    Dimensions: 35"L x 26"W x 12.5"H; unit weighs 50 pounds; power pack weighs 28 pounds. 110 volts; 450 watts. UL/CE/CSA approved. 2-year mfg. warranty. Color: green.

    Please read all information about RoboMower carefully before you buy to make sure it is appropriate for your yard. RoboMower's technical support team is prepared to help you solve any start-up issues. No returns accepted on RoboMower, however, if your new RoboMower is determined to be defective, the manufacturer will repair or replace it.

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    RoboMower RL850 Robotic Lawnmower
    Item #: 10328F

    $1,999.00
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