Robot Mower End of Season Checklist

A robot mower does not need a dramatic shutdown at the end of the season. It needs a planned last few weeks: a schedule that tapers off as the grass slows, a clean last cut on a dry day, and a tidy pack-up of the mower, the charging station, and anything mounted outdoors. This end of season checklist covers that whole routine, from the last cut to robot lawn mower winter storage, using the Sunseeker S4 LiDAR robot mower and the Sunseeker X5 AWD robot mower as worked examples.

One rule runs through every step: your user manual has the final say on storage temperature, battery charge level, and charging station care for your model. Where this guide sends you to the manual, that is on purpose.

When to Put a Robot Mower Away for Winter

There is no single date. The better signal is the grass itself. Robot mowers work by cutting a little and often, so they stay useful for as long as the lawn is still growing. Once growth slows to the point where a week of mowing barely changes anything, the mower is mostly wearing down blades and wheels for no visible result.

Three signs it is time to wind down:

• The grass has stopped growing. In most northern and midwestern states, this happens in late fall, around the first run of hard frosts.
• Frost is becoming regular. Frozen grass blades are brittle and bruise when they are cut, and wheels leave tracks on frosted turf.
• Wet days outnumber dry ones. The S4 is a good example. Its rain sensor sends it back to the charging station when it detects rain or fog, because water droplets interfere with LiDAR distance measurement. In a long wet spell, it will spend more time docked than mowing anyway.

If your lawn keeps growing through the winter, read the section on year round lawns near the end before you pack anything away.

The End of Season Checklist

Work through these eight steps over the last two to three weeks of the season. Steps 1 to 4 happen while the mower is still working. Steps 5 to 8 are the pack-up.

Step 1: Taper the Schedule, Not the Cutting Height

As growth slows, cut back the number of mowing days in the app before you touch the height. Keep to the one-third rule: never remove more than a third of the grass blade in a single pass. Dropping the height sharply for the last cut can scalp the lawn right before it goes dormant.

If you want cool-season grass a little shorter going into winter, lower the height one step at a time over the last few runs. On the X5, cutting height is set in the app anywhere from 1.6 in to 3.2 in, so a gradual step down takes a few taps rather than a trip to the garage.

Step 2: Clear the Lawn Before the Last Runs

Fall drops a lot onto a lawn in a short time: leaves, twigs, fallen fruit, and the odd forgotten toy or hose. Rake or blow heavy leaf cover off before the final runs. A thick, wet mat of leaves hides the grass the mower is meant to cut and packs debris under the deck.

Both mowers are built to steer around everyday obstacles. The S4 combines 3D LiDAR with Vision AI, and the X5 pairs AI obstacle recognition with anti-collision sensing for taller objects. That helps with hoses and toys, but it does not rake the lawn for you, so a quick clear-up still pays off.

Step 3: Save the Last Cut for a Dry Day

Plan the final cut for a dry afternoon. Wet clippings clump, stick to the underside, and are harder to clean off once they dry. The S4 already sits out rain and fog, but it is still worth watching the forecast so the last run happens on dry grass rather than in the first short break between showers.

Step 4: Record Your Map, Zones, and Schedule

Before you power anything down, take screenshots in the app of your map, zones, no-go areas, and schedule. It takes two minutes and makes spring setup easier if anything needs redoing.

This matters most on multi-zone yards. The S4 manages up to 100 zones across 5 maps, and the X5 up to 100 zones, so a front yard, back yard, and side strip can each keep their own settings. A set of screenshots is a quick record of how you had it all arranged.

While the app is open, check for firmware updates and install any that are waiting, so the mower starts next season on current software.

Step 5: Clean the Mower by Hand

Switch the mower off as the manual describes and wear gloves before you go near the blades. Then:

• Brush dried grass off the wheels, the underside, and the cutting disc. The S4 ships with a cleaning brush for exactly this job.
• Wipe the sensors with a soft, dry microfiber cloth. On the S4, that means the LiDAR unit and the front camera. On the X5, it means the binocular camera module.
• Skip the hose and the pressure washer. Water forced into seams and connectors is the kind of damage that shows up in spring. Use a damp cloth for stubborn dirt instead.
• Let the mower dry completely before it goes into storage.

Step 6: Check the Blades and Order Spares Now

Look over every blade for chips, bends, and dull edges, and check that the blade screws are secure. The X5 product page gives a useful rule of thumb: on lawns new to a robot mower or with longer grass, plan on fresh blades every one to two months, and once the lawn is kept at a steady height, blades last considerably longer.

The end of the season is the easiest time to deal with this. Blades, wheels, and casters for the X5 are stocked and can be ordered directly, so a set ordered now means the mower starts spring with sharp blades instead of waiting on a delivery in the first busy week. The S4 box includes six blades with screws, so check whether you still have spares before you order.

Step 7: Charge, Power Down, and Bring the Mower Inside

Robot mowers are built to work outdoors, not to spend the winter there. Freezing temperatures and months of damp are hard on lithium-ion batteries and electronics, so the mower should go indoors to a dry, frost-free spot such as a garage shelf, a utility room, or a basement.

• Charge level: charge the battery to the storage level your manual recommends before you switch it off, and avoid putting it away with an empty battery.
• Temperature: keep to the storage temperature range in your manual, and keep the mower away from heaters, furnaces, and direct sun as well as from freezing spots.
• Power: turn the mower fully off as the manual describes, rather than leaving it in standby.
• Cover: keep dust off with a breathable cover. The S4 comes with a protective cover in the box.
• Placement: store it flat, off a cold concrete floor if you can, with nothing heavy stacked on top.

If your manual asks you to check the battery partway through winter, set a phone reminder now so it does not get missed.

Step 8: Pack Up the Charging Station and Antenna

• Mark the spot. Before you lift the charging station, photograph it from two angles and mark its corners, for example with golf tees. Putting it back exactly where it was is the simplest way to keep it lined up with your saved map.
• Unplug and dry. Unplug the power supply, wipe the metal charging contacts with a dry cloth, and store the station, charger, and power adapter indoors somewhere dry.
• Coil cables loosely. Avoid tight loops and sharp bends, which stress the insulation in the cold.
• X5 owners, the RTK antenna. The X5 combines RTK-GNSS positioning with VSLAM vision, and its RTK antenna needs a clear view of the sky. If you take the antenna down for winter, note exactly how and where it was mounted and follow the manual for removing and refitting it. Refitting it in the same position, with the same open sky view, is the simplest way to get accurate positioning back in spring.

If Your Lawn Grows All Year

Not every yard gets a winter shutdown. In Florida, along the Gulf Coast, and in parts of California, lawns tend to slow down rather than stop, and some cool-season lawns keep growing through mild winters. In that case, skip the pack-up and scale back instead:

• Cut the schedule to the days the lawn actually needs, and keep the height steady.
• Keep leaves and debris cleared, since fall and winter storms bring down more of both.
• Do Steps 5 and 6 anyway at the end of the main season. A clean and a blade check are worth it on a mower that never gets a break.
• Expect the S4 to sit out rainy or foggy days. That is the rain sensor doing its job, not a fault.

Getting Back to Mowing in Spring

The work you do now pays off in a few months. When the grass starts growing again:

1. Put the charging station back on the marks you left and reconnect power. On the X5, refit the RTK antenna in its old position.
2. Charge the mower fully on the station before the first run.
3. Compare the map in the app with your screenshots. If a boundary no longer lines up, edit it or walk it again in the app. Both the S4 and the X5 let you change boundaries, no-go zones, and channels anytime without digging up the lawn.
4. Start with a higher cut and a light schedule, then step down to your summer height over the first few weeks.

Frequently Asked Questions

When should I put my robot mower away for winter?

When the grass has stopped growing and frost is becoming regular. For most northern and midwestern lawns, that means late fall. Until then, reduce the schedule rather than stopping, so the lawn goes into winter at an even height.

Can I leave a robot mower outside over winter?

It is not recommended. Robot mowers are designed to work outdoors during the season, but freezing temperatures and months of moisture are hard on the battery and electronics. Store the mower, the charging station, and the power supply indoors in a dry, frost-free place, following your manual.

How much charge should the battery have in storage?

Use the storage charge level in your model's manual. As a general rule for lithium-ion batteries, avoid putting the mower away with an empty battery, and follow any instruction to check or top up the charge during winter.

Will I need to remap my lawn in spring?

Putting the charging station, and on the X5 the RTK antenna, back exactly where they were is the best way to avoid it. If something has moved, compare the map in the app with your screenshots and edit or walk again any boundary that no longer lines up.

Planning for Next Season

If this season showed that your yard needs something different, the off-season is a calm time to compare. The Sunseeker S4 is built for complex yards up to 0.25 acre with trees, narrow passages, and multiple zones, and its 3D LiDAR keeps it working in heavy shade. The Sunseeker X5 covers yards up to 0.5 acre and uses all-wheel drive on slopes up to 60% (30°). You can see the full lineup in our robot lawn mower collection.