Power For Robotic Mowers

Most robotic mowers use batteries to function.  These are rechargeable and most typically allow somewhere between a couple hours and the bulk of a work day in performance before needing recharging.  Most modern robotic mowers will return to the charging station automatically when batteries reach a certain level and then resume the task where they left off after recharging.  Some mowers offer a hot swap technology to minimize mower downtime and allow battery switching instead of waiting for recharging. 

There are some robotic mowers that utilize internal combustion engines for a power source but the vast majority of these are not autonomous in nature.  Right now the majority of the market for robotic mowers utilizing internal combustion engines is within larger units that are typically used for more of a brush type applications or major slope applications where more a bigger machine with more power and range/size is needed and the unit is controlled with a person operating a handheld remote.  These type of units are tens of thousands of dollars.  

Small residential mowers typically use very minimal wattage when charging and at idle when connected to a charging station.  The average cost for a residential mower hooked up to an outlet and powered through the grid runs between $6.00 and $10.00 per year, this number can vary depending on total usage, cost of power, and the length of your mowing season.  Larger commercial mowers with bigger batteries and more frequent and sizeable usage will draw more but the cost will not break the bank or be any sort of real high draw.  Some older mowers still use a boundary wire and that can also be a small draw even with nothing on the charging station.  More modern mowers often have a reference station for RTK which is something mounted near where the mower operates and communicates with satellites or other ground reference stations.  These are a very low draw as well that is separate from the charging station.  The most modern mowers are using some combination of a net based RTK system and/or LiDar which doesn’t require a separate device or separate power draw.

Another option other than a standard outlet for power is solar.  Solar is a great fit for robotic mowers for a couple reasons.  One reason being that it allows the mower to be set up and operate from anywhere the solar panels and solar battery system is set up.  This can be the side of a yard or wherever one wants it.  Many people only have power in certain areas near their garage or house so using solar gives one more freedom in determining the location of mower.  Solar can also prove to be a reliable source for remote power.  This is particularly useful for more remote applications like rural cemeteries, roadside parks/rest areas, or golf course holes where there may not be any source of grid supplied power within a reasonable distance.  There is some additional cost in setting up a solar power system to power a charging/base station but these are often seen for $500 - $2000 when you factor in a complete set up with battery, solar panel/s, and inverter system. One will also not have any recurring power charges to pay for once powered by solar. That cost is unlikely to every pay for the solar equipment needed but it is a factor. Modern solar batteries are often rated for several thousand cycles so this can be a long term solution.

Benificial Areas For Commercial Robotic Mowing

What areas really work the best for robotic mowing?  That is a fair question and while all areas work it is true certain areas and conditions surrounding areas do make the most sense to implement robotic mowing.  Robotic mowing can handle virtually any area but really do excel in certain areas compared to traditional mowing.  These areas include:

  • Remote or difficult to access areas
  • Areas with significant slope 
  • Hazardous areas like a golf range or shooting range 
  • Hazardous areas around roads or airports 
  • Areas with many obstacles to maneuver around like tree farms , cemeteries, or orchards.    
  • Areas that are noise or pollution sensitive - like wildlife refuges, zoos, or churches.
  • Areas that present hazards to people and heavier equipment - wetland, pond, or river edges.
  • Areas that require more frequent mowing like golf courses.

This isn’t to say a robotic mower won’t work great on a traditional yard or a wide open area of turf like a football field - it absolutely will.  There is just an even more significant time savings and reduction in hazards over traditional mowing when we look at the areas and conditions in the first paragraph.

Most robotic mowers for turf applications weigh between 50 and 400 pounds so they don’t tend to have the impact on turf that larger equipment does.  Nearly all of them mow a narrower pattern than gas or diesel engine driven equipment but when you can work 24 hours a day and don’t require a person to operate that is offset rather quickly.  The narrower width allows for more uniform cutting and maneuverability around objects.  Robotic mowers also have a much lower center of gravity than traditional mowing equipment.  This provides for more stability on slopes to begin with and adding control autonomously lets robotic mowers avoid situations where a person could get into trouble.

Is Robotic Mowing Worth It?

The benefits of autonomous robotic mowing are significant in many applications.

A home owner can free up time, reduce up front costs, keep the lawn at a cabin, second home, or rental property mowed without having to be there in person, reduce pollution, reduce noise, have their lawn mowed more frequently for aesthetic appeal with better turf health and quality, and minimize recurring costs associated with fuel and maintenance on traditional mowers.  Many homes are set up ideally for a single mower to handle multiple properties that are adjacent or close to each other.  When you have one mower taking care of multiple homes the benefits are even greater.  With the initial upfront cost of a residential mower handling .75 - 2.5 acres usually between $2,000 and $4,000 these mowers make sense for a single home but when considering they are able to handle multiple properties with next to no additional expenses the proposition is even more attractive.

Municipalities, golf courses, airports, campgrounds, cemeteries, resorts, school districts, parks, athletic facilities, and other areas with significant areas of turf to maintain and mow can also benefit from automation in terms of mowing.  We have models of autonomous lawn mowers designed to handle from less than an acre all the way to 30 acres in a relatively short time. While the costs with mowers able to handle 20-30 acres are in the tens of thousands of dollars the capabilities of them are immense.  Nearly all of these individual units can be combined and work together with other units in harmony so it is quite easy to accommodate mowing needs to the hundreds of acres.  Autonomous mowing doesn’t replace your maintenance staff, but it enables them to automate the most basic and time consuming parts of their days.  Autonomous mowing doesn’t handle 100% of your mowing and maintenance needs but it can typically handle 80-90% of your mowing tasks in a manner that is very high quality and very efficient with next to no time from a person and very low recurring costs once things are set up.  Mowing robotically with autonomous units allows for more frequent and stable maintenance of areas that were historically time consuming.  Staff can focus on more technical aspects of turf care and property maintenance allowing them to do more with less and add value.

An often overlooked segment of the population that can benefit from implementing some level of automation in mowing are commercial lawn and landscaping contractors.  Mowing grass is often the most basic function these companies perform and despite the relative simplicity of it, the time it takes is quite significant.  Automation in mowing isn’t going to replace the need for a person but it is going to enable them to handle more customers and provide better results.  Automation for a contractor who is mowing can be deployed on the most time consuming areas and easily handles obstacles that slow down traditional large scale mowing.  Automated mowing can allow a contractor to mow much more frequently than manned mowing.  By more frequent mowing long term you get stronger turf that is healthier and looks better.

By deploying some level of autonomous mowing a contractor can handle more customers and focus on higher end services that both residential and commercial customers demand - like fertilization, seasonal clean ups, trimming, edging, landscape refreshing, planting, aeration, and topdressing.  When dealing with customers in a subdivision or HOA the potential to market to groups of property owners in a single location is great.  Having a single autonomous mower, purchased at a wholesale rate by a contractor, mow multiple homes is very plausible and very attractive to your business model.   Your customers will love autonomous mowing because it is consistent, offers more frequent mowing, quiet, doesn’t pollute, and produces tremendous results  

We believe contractors benefit the most from deploying dedicated units to mow a property and leaving them on site.  This differs from the traditional mindset of route based property maintenance and traveling with all equipment from job to job.  While there is some potential in having an autonomous mower travel with a crew and perform mowing while a crew does ancillary tasks this requires a significant level of coordination and timing to be efficient and the units capable of this are significantly more expensive than dedicated units.  One could purchase 25-50 dedicated residential units for the cost of a single commercial robotic mower designed to travel with a crew. 

By having a dedicated unit at a property it is easy to offer mowing every 2-3 days and also very easy to set a single unit up to mow adjacent properties.  By utilizing this strategy a contractor can now spend less time at each site when doing inspections, cleaning, trim, & edging only compared to having all mowing to complete.  On site visits can typically be extended slightly also as the majority of mowing is done already and supporting services can be stretched out.  Autonomous mowers are not the enemy of lawn and landscaping contractors, they are tools that can be utilized to improve efficiency, profitability, and quality as part of your operation.  The technology is autonomous mowing is so good now you simply can’t afford to ignore it.

Dale Kleffman is the owner of LAWNAMATION, by Musson Landscaping.  LAWNAMATION is a full service B2C and B2B in both retail and wholesale as a seller of autonomous robotic lawnmowers and is the exclusive distributor of Mammotion products in Michigan, Wisconsin, & Minnesota. Musson Landscaping operates as a full service lawn company and landscaping company operating out of Northern Wisconsin.  LAWNAMATION provides sales, service, and customer support for Mammotion and other autonomous robotic mowing products throughout its territory.  Dale can be reached a dalek@mussonlandscaping.com or 715-891-0419.

Theft and Robotic Mowers

We field numerous questions from customers and prospective customers worried about someone stealing their mowers.  While not an expert on all brands we can speak to what Mammotion does for their mowers and address our commercial mowers.

We can start with the commercial mowers - first off good luck with stealing one.  These things are big and heavy, you’d need multiple people to even think about lifting or moving it and something pretty big to load it in to.  It is going to be constantly reporting its location to its owner so any theft or attempted theft is going to be short lived.  Our commercial mowers also have a pin required to access the app so even if it is a sophisticated thief they won’t have any luck.  Additionally our anti theft system includes an instant alarm if the unit is lifted or moved outside of its designated operating area.  Lastly the units provide immediate real time GPS tracking to its exact location.

Our residential mowers from Mammotion are tied to a master user, the person who originally bound the unit when it was new and just opened.  Only the master user can remove themselves from this role through “unbinding” the unit.  The only reason for this would be to transfer ownership or full authority over the mower to someone else.  The master user can share access with anyone they want but if someone tries to access or use the robot they will be unable to.  There is no way to over-ride this other than the master user voluntarily doing it so they will be carrying around a paperweight if they steal it.  Additionally if the mower is on it will provide a user notification that it was taken outside of its operating area and provide its location to the master user on the app via wifi or 4g.  There is a place in the Mammotion mowers to place an air tag or gps tag as well if that is desired for even more security.

We do place labels on mowers that advise any potential thief that the mower is useless to anyone other than its owner and reports its location to its owner for a passive deterrent also.  We are fortunate that we have not had any issues with theft

Commercial and Municipal Robotic Mowing

We get a lot of questions about larger areas of turf and being able to successfully implement autonomous robotic mowing.  There are certainly great options out there for places like golf courses, school districts, municipalities, cemeteries, campgrounds, parks, airports, resorts, summer camps, and other places that have large amounts of turf they need to mow regularly.   These facilities have high standards for mowing quality and much larger expenses to maintain their grounds then the rest of society.  

Autonomous robotic mowing makes a ton of sense, especially in Michigan, Wisconsin, and Minnesota where we primarily work.  Our mowing season is somewhat short so the work is seasonal for those willing to provide it.  Finding an employee or third party person or a company to take care of it is getting more difficult and more expensive.  Mowing is often the most basic task asked of grounds crew. Eliminating some or all of this time spent mowing could have your team focusing on more technical aspects of grounds maintenance where their knowledge and expertise is far more valuable.  

Traditional lawn care equipment has increased in cost and still requires labor, fuel, and some level of maintenance.  Autonomous mowers can be set to operate when and where desired and they don’t call in sick.   Autonomous mowing is able to work near continuously to keep things fresh and cleanly cut with little to no clippings to pick up.  These mowers will work at night and don’t require sleep.  Many commercial models have hot swap battery charging to even reduce or eliminate any time spent charging.  

We have the ability to provide autonomous mowing equipment to handle from less than an acre of grass up to hundreds of acres autonomously.  Our larger units can handle 20 - 30 acres of mowing area in a 3 day span per each unit.  You can use multiple units simultaneously or transfer units to other areas to increase capacity of acreage handled.   Mapping with commercial units can often be done with handheld scanners and 3D LiDar and is something we provide as a service for those customers who are evaluating or purchase units through us.   Mowers can share maps and data and work in tandem to cover larger areas.  Managing areas for mowing can be done digitally and monitored remotely.

Nearly everyone agrees the concept makes a ton of sense, yet the implementation remains somewhat limited for many of those with significant areas of turf to maintain.  Everyone is curious and interested while wanting to see others try it first.  We have tried it and spent countless hours with these machines evaluating their performance.  We are here and ready to back it up and not just tell you but show you.  We have multiple units ready to demo on your location with no cost or obligation.  The technology has improved vastly in recent years and none of our mowers require any buried wire, all have real time feedback on performance and location even when monitored remotely, and none of them have any subscription services required following purchase.

If you are curious about potential cost and applicability for your larger areas of turf mowing please reach out.  We are happy to talk on the phone or provide an in person demonstration of what equipment can do. Some of our mowers have capabilities that include striping athletic fields fully autonomously and even picking up golf balls.