Yarbo Y40P Core Robot Lawn Mower Review

The Core is the chassis that does the driving. Two brushless hub motors sit in the tracks, a 36V, 38.4 Ah battery (1.38 kWh) feeds the machine, and the docking station charges it without a cable. Two RTK Antenna Pro units, a HaLow antenna and the tow hitch come in the box. The Core maps your property, drives itself, docks itself and pulls up to 500 lb. It has no cutting deck.

The Lawn Mower Pro module is the mowing attachment. It carries two 300 W cutting motors with a 2,500 W peak, a 20-inch cutting width, a cutting height from 1.2 to 4 inches, two cutting discs with five razor blades each, and rain detection. The same Core also takes a snow blower, a blower and a trimmer, which is what the four-season label refers to.

The practical consequence is simple: the mowing purchase is the Core plus the module, and the configuration shown on the product card decides whether the boxes that arrive can cut grass. The hub-motor drive, the 20-inch deck, the 7-acre weekly capacity and the module system are what justify this product's price: you pay for capability and for one machine that works all year, not for a first robotic mower.

Coverage for a big property

Yarbo rates the mowing setup at 0.3 acre per charge, 2 acres per day and 7 acres per week at two cuts. The product sheet lists 7,000 ft² per charge and a 7-acre weekly capacity. That is a machine for acreage, not for a suburban front lawn.

Slope handling

The mowing slope limit is 70% (35°), which the tracked chassis makes possible. Banks and ditches that stop a wheeled mower are within its range.

Speed and drive

Top drive speed is 1.2 m/s, about 2.7 mph, from gearbox-free hub motors. Yarbo puts the gain over the previous generation at roughly 15% better efficiency and 53% more ground covered per hour while mowing.

No boundary wire

Navigation combines AI vision, RTK positioning, NetRTK correction, an inertial sensor and odometry. Nothing gets buried in the lawn, which matters on properties split by a path, a driveway or a fence line.

Quiet running and weather range

The machine runs at about 60 dB, quiet enough for an early start. It works from −13°F to 113°F, the mower module is rated IPX6 against water, and rain detection sends it back to the dock.

Charging and towing

The wireless dock takes the battery from 20% to 80% in about 90 minutes, and a charge gives roughly Auto-Charge. The 500 lb towing capacity turns the Core into a small hauler between cuts.

The Core does not mow until the Lawn Mower Pro module is fitted, and that is the limit that catches most buyers.

Edges stay your job

The mower leaves an uncut strip along boundaries and obstacles, so you still need a string trimmer. The trimmer module is a separate attachment and a separate purchase.

Weight and setup

The Core alone weighs about 134 lb. Assembled with the mower module it is roughly 198 lb (88.2 kg), the figure the product sheet lists for that configuration. It arrives in several boxes, setup realistically takes two adults, and swapping modules is a lift, not a click. This is not a machine you carry up steps.

NetRTK coverage matters

The Y40P ships without a Data Center base station and relies on Yarbo's NetRTK correction service. Coverage depends on where you live, so check your address before ordering.

No track record yet

There are no owner reviews of the Y40P yet, and the efficiency gains from the hub-motor redesign are Yarbo's figures. The previous generation of the platform was already praised for climbing steep slopes, so the real-world gain may be smaller than the marketing suggests. There is also no upgrade path from the earlier Core: the decision is made once.

Warranty scope

The warranty runs 2 years and excludes commercial, professional and rental use, even though the platform is marketed for large properties.

The 7-acre weekly figure is the mowing number. The much larger coverage headline attached to the platform refers to towing and patrol work, not to cutting grass. On weight, plan around 198 lb (88.2 kg) for the assembled mowing setup.

The Y40P Core ships without a Data Center base station. Instead it takes its RTK correction from NetRTK, Yarbo's network service, which is free for life under the manufacturer's current policy but works only inside covered areas. Confirm coverage at your address before you order; this is the single most practical check on the whole purchase.

NetRTK supplies positioning, not the local radio link that a base station provides. The machine therefore depends on the correction service and on its own connectivity to know where it is. If your property sits outside coverage, the Data Center base station is the alternative, and it is a separate purchase that does not come in the Core box.

Maps are tied to a place. Moving the dock more than about 20 km, roughly 12 miles, means remapping the property, because the map does not travel with the machine.

The machine arrives in several boxes, the module has to be lifted onto the chassis, and at roughly 198 lb assembled the machine stays where you put it.

Dock and first map

Day to day

The machine leaves the dock on schedule, mows, returns and charges itself.

Connectivity and consumables

4G is included for the first year and becomes an optional annual subscription afterward. NetRTK itself stays free.

No owner reviews of the Y40P exist yet, so the record comes from the platform's previous generation. One research passage on owner-forum failure patterns reports GPS and RTK positioning problems, app and connection trouble, docking and charging faults, and issues with cut quality and missed strips. Treat that as the platform's history, not a forecast for this model.

The warranty runs 2 years and can be extended to 5 through the manufacturer's extended plan, but only when the machine is bought from the manufacturer or an authorized dealer. Tracks, antennas, blades, discs and caster wheels are excluded as consumables, along with weather and environmental damage, commercial or rental use, and use outside the country of purchase. Returns are accepted for 30 days, the buyer pays return shipping, and missing packaging is charged, so keep every box.

The machine has an emergency stop, obstacle detection through its cameras and AI vision, and lift and tilt sensors. At roughly 198 lb with the mower fitted, it should not run where children or pets are loose and unsupervised.

In 2026 researchers disclosed a serious flaw in the platform: a shared hardcoded credential that allowed remote access to units. The manufacturer confirmed the findings, revoked the factory accounts, issued per-device certificates and made remote diagnostics opt-in. A Y40P bought new ships with those fixes applied.

No UL, ETL or CSA safety listing was found for this product, and no CPSC recall exists. That is the state of the record, not an accusation.