Monarch Tractor MK-V Review: Specs, Price, and 2026 Status

What Is The Monarch Tractor MK-V?

The MK-V is a compact, four-wheel-drive electric tractor built by Monarch Tractor, a Livermore, California startup founded in 2018 by Praveen Penmetsa (CEO), Carlo Mondavi, Zachary Omohundro, and Mark Schwager. Monarch marketed it as the world's first fully electric, driver-optional, smart tractor: you can drive it manually like a normal tractor, or let it run autonomous rows on its own.

It is built for specialty agriculture — vineyards, orchards, and row crops — where its tight turning radius, 360-degree cameras, and precision computer vision fit narrow rows better than a full-size row-crop tractor. Early commercial deployments went to Wente Vineyards and Constellation Brands' To Kalon Vineyard in Oakville, California, and Monarch says it has shipped roughly 500 tractors to date.

This page covers the MK-V's real specs, its actual price, how the autonomy works, and — because the story changed dramatically in 2025-2026 — an honest account of where Monarch Tractor stands today after its acquisition by Caterpillar.

MK-V Specs And Autonomy Features

The MK-V pairs a 40 hp rated (70 hp peak) electric powertrain with a standard CAT I/II three-point hitch and 540 RPM PTO, so it accepts the same mowers, tillers, sprayers, and weeders a diesel compact tractor would use. Monarch lists up to 14 hours of runtime depending on the implement, an 8-year/8,000-hour battery warranty, and charge times of roughly 5-6 hours on an 80-amp charger or 10-12 hours on a standard 40-amp circuit.

The autonomy layer runs through Monarch's WingspanAI platform: roof-mounted 360-degree cameras and computer vision handle row-following and collision detection, a camera above the hitch monitors what the implement is doing, and the PTO cuts off automatically if an object comes within about a foot. Monarch says one operator can supervise up to eight tractors running autonomous rows at once, with the option to jump in and drive manually at any time — the 'driver-optional' part of the pitch.

For how this compares with other autonomous work vehicles rather than tractors specifically, see our robot vehicle price roundup, which tracks Monarch alongside Waymo, Zoox, and Bear Flag Robotics-style retrofit autonomy.

• 40 hp rated / 70 hp peak electric drivetrain, 4WD.
• CAT I/II 3-point hitch, 540 RPM PTO — standard implement compatibility.
• Up to 14 hours runtime; 5-12 hour recharge depending on charger amperage.
• 360° camera-based row-following, collision detection, and PTO auto-cutoff.
• One operator can supervise up to 8 tractors simultaneously via WingspanAI.

How Much Does The Monarch Tractor MK-V Cost?

Monarch has publicly quoted the MK-V starting around $68,000-$78,000 for a base unit, with dealer listings and used/founder-series units ranging roughly $58,000 to $89,000 depending on configuration, year, and condition. That figure is before any software subscription for the autonomy features, which Monarch sold separately from the hardware.

US buyers in some states could offset part of that cost through incentive programs such as California's Clean Off-Road Equipment (CORE) voucher project, though eligibility and voucher availability vary and should be confirmed directly with the program, not assumed from marketing copy.

Given the company's 2025-2026 collapse (next section), treat any 'buy a new MK-V' price as unverified until you can confirm an actual selling entity — Monarch's own hardware business no longer exists as a going concern.

Monarch Tractor's 2025-2026 Collapse And The Caterpillar Acquisition

Monarch raised roughly $220 million across five rounds, including a $133 million Series C in mid-2024 that valued the company at about $518 million, with backers including Astanor, HH-CTBC Partnership, At One Ventures, CNH Industrial, and Musashi Seimitsu. Despite that funding, the company could not turn deployments into a sustainable business.

Monarch cut over 10% of staff in late 2024, lost its contract manufacturer when Foxconn sold the Ohio plant building its tractors to SoftBank in August 2025, and was sued by at least three dealers — including one, Burks Tractor, alleging nearly $800,000 of tractors that didn't actually operate autonomously as sold. A further round of roughly 100 layoffs followed in late 2025, and by early 2026 Monarch had vacated its Livermore headquarters and auctioned off remaining equipment.

In April 2026, Monarch confirmed its core software-defined vehicle platform, perception stack, and electrification technology had been acquired by Caterpillar, ending the company's run as an independent hardware maker. Caterpillar's acquisition covers Monarch's technology and IP, not a continuation of the MK-V as a retail product — as of this writing there is no public statement on ongoing service, parts, or warranty support for tractors already in farmers' hands, so existing owners should contact Caterpillar directly for support status rather than assume continuity.

Should You Buy A Used MK-V Today?

If you already own an MK-V, the practical questions are support and parts, not marketing promises — verify with Caterpillar (or any successor entity) whether software updates, the WingspanAI subscription, and hardware service are still available before relying on the autonomy features for a working season.

If you're shopping for an electric or autonomous tractor new, the MK-V's used and auction-market units are worth evaluating on hardware alone — 4WD electric drivetrain, standard 3-point hitch, real runtime — but budget for the real chance that Monarch-branded software support fades out, and confirm any 'autonomous' claims independently given the dealer lawsuits over that exact feature.

For where the MK-V sits among other farm and industrial autonomy, see our agricultural robots overview, and for the broader field of self-driving and autonomous vehicles we track, see our robotics news hub.