It Is Worth Getting a Robot Lawn Mower

Sick of spending hours mowing the lawn every week?

A robot lawn mower handles the work for you, saving time, reducing effort, and keeping your grass evenly trimmed with minimal electricity use.

When I first started exploring smart garden tools, the robot lawn mower stood out. I’ve tested, sold, and supported hundreds of models. The one question I always get from customers is: is it really worth it? Let’s break it down from power usage to rainy-day performance.

Do robot mowers use a lot of electricity?

If you’re switching from gas or manual mowing, energy cost might be your first concern.

Robot mowers are energy-efficient and use very little electricity—on average, less than 20 kWh per month depending on lawn size and model.

Dive Deeper: How Much Power Does a Robot Mower Really Use?

One of the biggest benefits of robot lawn mowers is their low energy cost. They run on rechargeable lithium-ion batteries and draw power from a charging station that plugs into a standard outlet. Let’s put that into perspective.

1. Average Power Consumption

Most robot mowers use between 15 to 25 kWh per month. To compare, that’s about the same as running a small household appliance, like a fan. Even larger models designed for commercial lawns won’t exceed 35 kWh/month.

2. Charging Efficiency

Most robot mowers return to their charging station automatically. They charge slowly and steadily, which extends battery life and reduces power surges. Energy use is even lower if the mower has smart scheduling and rain sensors that stop mowing when it’s not needed.

3. Power vs. Performance

Unlike gas mowers, robot mowers don’t waste energy idling. They only use power when cutting. That means you’re not just saving time—you’re also keeping electricity bills low while maintaining a perfect lawn.

For anyone concerned about long-term operating costs, the robot mower is one of the most efficient tools you can use outdoors.

Can robot mowers cut wet grass?

You wake up, it rained last night—can the robot mower still run?

Most robot mowers can cut wet grass, but it’s not recommended for best results. Wet conditions may affect cut quality and mower traction.

Dive Deeper: What Happens When It’s Wet Outside?

I’ve seen robot mowers running in every kind of weather. While many models are waterproof or weather-resistant, there are some important things to know about how they perform in wet grass.

1. Slippery Lawns

Wet grass reduces traction. Robot mowers can slip, especially on slopes. This may cause uneven patterns or repeated mowing in the same spot. If your lawn has soft soil or heavy grass, the wheels may also leave tracks.

2. Cutting Quality

Wet grass clumps together. This leads to uneven cutting¹, clogging, or bunching under the mower deck². It won’t damage the machine, but the final look might not be as clean.

3. Blade Lifespan

Mowing wet grass can dull blades faster. When the grass is wet, more resistance is created. Dirt and moisture stick to the blades, which affects long-term performance.

Many models come with rain sensors³ that delay mowing when it’s too wet. If yours doesn’t, you can set the mower to skip a cycle or manually pause it after a downpour. Waiting a few hours until the lawn dries out is usually best.

Where does the grass go with a robot mower?

There’s no bag, no clippings to collect—so where does the grass go?

Robot lawn mowers mulch the grass into tiny clippings, which fall back into the soil and act as a natural fertilizer.

Dive Deeper: The Mulching System Explained

Robot mowers don’t just cut your lawn—they improve it. Instead of collecting grass like traditional mowers, they mulch it. Here's how that works and why it’s a benefit, not a problem.

1. Continuous Mowing = Short Clippings

Since robot mowers run frequently, they only cut a few millimeters at a time. The grass clippings are so small they fall deep into the turf and disappear. You never see them, and there’s no mess to clean up.

2. Natural Fertilizer

The clippings break down quickly and return nutrients to the soil. This supports a healthier lawn by reducing the need for synthetic fertilizer. It's better for your garden, and better for the environment.

3. Cleaner Operation

With no collection bag, there’s nothing to empty or dump. This makes the robot mower truly automatic—set it, forget it. There’s also less odor and fewer piles of waste to manage.

For customers like Sophia who value clean garden presentation and low maintenance, the mulching system is one of the top reasons they switch to robot mowers. It’s efficient, invisible, and helps the lawn grow stronger over time.

Conclusion

Robot lawn mowers use little power, need almost no cleanup, and keep your lawn tidy—making them a smart, time-saving investment for both home and commercial gardens.