Riding & Robot Mowers
Best electric mower for two acres
Only one machine we hold specs for publishes a two-acre figure. Here is what it takes to get there, and what the alternatives actually cost you in time.
Affiliate disclosure: we earn a commission if you buy through our links, at no extra cost to you. It never changes which product we rank first — here is how we're funded.
We have not tested these units. Every spec on this page comes from the manufacturer's own documentation and is linked to it. Every computed figure is arithmetic you can redo. Prices are checked daily — last verified January 1, 1970. Here is exactly how we pick.
Quick picks
Ranked on the published specs and the arithmetic below. Tap any row to jump to the full write-up. We have not tested these units -- here is exactly how we pick.
| # | Product | Best for | Score | Price |
|---|---|---|---|---|
| 1 | No photo EGO Power+ Z6 42" Zero Turn ZT4204L 2,240Wh of the same 56V packs that run the rest of your yard, and a published two acres on a charge. | Best overall | 8.8 | |
| 2 | No photo Kobalt 80V Max 21" Self-Propelled (dual-port) Two 4Ah bays, 80 published minutes and an acre rating -- the most runtime per purchase of any 80V walk-behind here. | Best two-bay runtime | 8.4 | |
| 3 | No photo EGO Power+ 21" Select Cut LM2135SP The most watt-hours in the box of any flagship walk-behind here, on the platform with the widest tool range to grow into. | Best overall | 9.1 |
#ad Buy links are affiliate links. Prices come from a live daily check; where we have no verified price we say "check price" rather than print a stale one.
Two acres is the size where the cordless category thins out fast. Walk-behind ratings stop at one acre, robot ratings stop at an eighth, and exactly one machine in our registry publishes a figure that reaches two. This page is about that machine and about what the alternatives really cost.
The short answer
1. EGO Z6 ZT4204L — the only published two-acre figure
| Spec | Published figure |
|---|---|
| Deck | 42 in |
| Coverage | Up to 2 acres per charge |
| Batteries included | 4 x 56V 10.0Ah |
| Bay capacity | Up to 6 packs |
| Top speed | 8 MPH |
| Power claim | 22 HP gas equivalent |
| Lighting | 32 LED |
| Warranty | 5-yr tool, battery and charger |
From the EGO Z6 ZT4204L product page, checked 3 September 2026.
That premium is the honest cost of the class. A 42 inch deck moving at speed does more work per minute and pays for it in watt-hours. What you buy back is time, and on two acres the time difference is measured in hours rather than minutes — the arithmetic is in how long it takes to mow an acre.
Two details on this machine matter more than they sound. The six bays mean range is expandable rather than fixed, and the packs are the identical 56V ARC Lithium units that run EGO's handheld tools — so a household already on the platform is not starting from zero. The five-year warranty covering charger as well as tool and battery is the broadest term in our registry.
#ad Check the EGO Power+ Z6 42" Zero Turn ZT4204L price on Amazon — how we're funded.
2. Kobalt 80V dual bay — the walk-behind ceiling
If a rider is out of the question, this is the largest published walk-behind rating we hold: one acre, from 640Wh installed across two 80V 4.0Ah bays, with 80 published minutes and seven drive speeds.
On two acres it becomes a two-session machine. That is not a criticism — it is what the rating says, and Kobalt is one of only two brands willing to publish an acreage figure at all. Plan on charging between halves, or on a spare pair of packs.
#ad Check the Kobalt 80V Max 21" Self-Propelled (dual-port) price on Amazon — how we're funded.
3. EGO LM2135SP — the platform-sharing fallback
There is one situation where a 21 inch walk-behind is the right answer on two acres: when most of the two acres is not lawn. Plenty of large lots are a mown half-acre plus paddock, orchard or rough ground that gets cut twice a year, and buying a zero turn for that is buying a lot of machine for a small job.
The LM2135SP carries 420Wh, publishes 60 minutes, has the widest cut-height range here at 1-4 inches over eight positions, and — the reason it is on this page — runs the same 56V packs as the Z6. If you later buy the rider, nothing you own is stranded.
#ad Check the EGO Power+ 21" Select Cut LM2135SP price on Amazon — how we're funded.
The published ratings, ranked
| Machine | Deck | Published coverage | Energy installed |
|---|---|---|---|
| EGO Z6 ZT4204L | 42 in | Up to 2 acres per charge | 2,240Wh (up to 3,360Wh) |
| Kobalt 80V dual bay | 21 in | Up to 1 acre | 640Wh |
| Greenworks LM2108S | 21 in | Up to 1/2 acre | 320Wh |
| Greenworks LM2054 | 20 in | Up to 1/3 acre | 160Wh |
| EGO LM2135SP | 21 in | Not published | 420Wh |
| Segway Navimow i105N | 7.1 in | Up to 1/8 acre | Not published |
Every figure transcribed from the manufacturer's own product page, checked 3 September 2026. Coverage ratings are manufacturer claims under conditions none of them publish.
Who should not buy any of this
- If only half an acre of the two is actually mown: buy for the mown half. The rest is a brush-cutting problem, not a mowing one.
- If the ground is steep: no manufacturer of any riding mower in our registry publishes a slope limit. The only gradient figure we found from any mower manufacturer of any type is Segway's 16 degrees for a robot. Absence of a figure is not permission.
- If storage is the constraint: a 42 inch deck needs somewhere to live for fifty-one weeks a year.
What we cannot tell you
We have not driven the Z6 or pushed either walk-behind. Coverage ratings are best-case claims, and two acres of real ground with trees, beds, slopes and a fence line is not two acres of open test field. Nobody publishes a figure for how much coverage those obstacles cost.
What is published is one two-acre claim, one one-acre claim, and the energy arithmetic that connects them. That is enough to size the purchase and to know which claims came from whom.
The picks in full
Specs are the manufacturer's own and linked to the page they came from. Prices come from a live daily check; where we have no verified price we say so rather than print a stale one.
EGO Power+ Z6 42" Zero Turn ZT4204L
EGO · EGO 56V ARC Lithium · Our score 8.8/10
#ad No verified live price right now, so we show none rather than a stale one. How we're funded.
2,240Wh of the same 56V packs that run the rest of your yard, and a published two acres on a charge.
Published specs
| Deck | 42 in |
|---|---|
| Power claim | 22 HP gas equivalent |
| Top speed | 8 MPH |
| Batteries included | 4 x 56V 10.0Ah |
| Bay capacity | Up to 6 packs |
| Coverage | Up to 2 acres per charge |
| Warranty | 5-yr tool, battery and charger |
Source: POWER+ 42" Z6 Zero Turn Riding Mower (ZT4204L), egopowerplus.com
56V x 10.0Ah = 560Wh per pack. Four packs = 2,240Wh; six bays filled = 3,360Wh. Against the published 2 acres on four packs, that is roughly 1,120Wh per acre -- the number to size any electric riding mower against.
What the numbers favor
- Uses the identical 56V ARC Lithium packs as EGO's handheld tools -- the batteries are not stranded
- Six battery bays, so range is a purchase decision rather than a fixed limit
- 5-year warranty covering tool, battery AND charger
- 32 published LED lights, which matters more than it sounds for dusk mowing
What they don't
- Four 10.0Ah packs is a substantial share of the purchase price on its own
- EGO's published watt-hour figure for this configuration does not reconcile with 56V x 10.0Ah x 4; we publish our own arithmetic (2,240Wh) and show the working rather than repeat a number we cannot verify
your lot is under an acre. A 21 in walk-behind finishes a half acre in the time it takes to get a zero turn out of the shed, and costs a fifth as much.
How it scores
Scores are our editorial weighting of the published specs above, not a test result. They are deliberately kept out of this page's structured data.
Kobalt 80V Max 21" Self-Propelled (dual-port)
Kobalt · Kobalt 80V Max · Our score 8.4/10
#ad No verified live price right now, so we show none rather than a stale one. How we're funded.
Two 4Ah bays, 80 published minutes and an acre rating -- the most runtime per purchase of any 80V walk-behind here.
Published specs
| Deck | 21 in, steel |
|---|---|
| Motor | Brushless |
| Batteries included | 2 x 80V 4.0Ah (dual port) |
| Runtime claim | Up to 80 min |
| Rated for | Up to 1 acre |
| Drive | Self-propelled RWD, 7 speed settings |
| Recharge | Approx. 60-90 min |
Source: Kobalt 80-Volt 21-in Self-propelled Battery Mower (2 batteries), lowes.com
80V x 4.0Ah = 320Wh per pack; two bays = 640Wh installed. Kobalt's listing does not state whether the two ports discharge simultaneously or in sequence, so we do not claim either -- what is verifiable is that 640Wh is on the machine when you start.
What the numbers favor
- 640Wh installed across two bays, the most of any walk-behind on this page
- Rated to 1 acre, twice the Greenworks 80V flagship's half-acre rating
- Seven published speed settings on the self-propel drive
- All Kobalt 80V packs are cross-compatible across the 80V outdoor line
What they don't
- Sold through Lowe's only, so availability and price track one retailer
- The listing does not publish weight, cut-height range or a noise figure
- Kobalt's 80V outdoor range is narrower than EGO's or Ryobi's
you want a platform rather than a mower. Kobalt is a single-retailer house brand -- fine for the tool, thinner as a decade-long ecosystem bet.
How it scores
Scores are our editorial weighting of the published specs above, not a test result. They are deliberately kept out of this page's structured data.
EGO Power+ 21" Select Cut LM2135SP
EGO · EGO 56V ARC Lithium · Our score 9.1/10
#ad No verified live price right now, so we show none rather than a stale one. How we're funded.
The most watt-hours in the box of any flagship walk-behind here, on the platform with the widest tool range to grow into.
Published specs
| Deck | 21 in |
|---|---|
| Cutting torque | Up to 7.0 ft-lbs |
| Battery included | 56V 7.5Ah |
| Cut height | 1-4 in, 8 positions |
| Self-propel speed | 0.9-3.1 MPH |
| Runtime claim | Up to 60 min |
| Warranty | 5-yr tool / 3-yr battery |
Source: EGO POWER+ 21" Select Cut System (LM2135SP), egopowerplus.com
56V x 7.5Ah = 420Wh, using EGO's advertised pack voltage.
What the numbers favor
- 420Wh in the box -- the largest included pack of any flagship walk-behind on this page
- Eight cut-height positions from 1 to 4 in, the widest published range here
- Three interchangeable lower blades (mulching, high-lift bagging, extended runtime)
- 5-year tool warranty, the longest published on this page
What they don't
- EGO publishes torque (7.0 ft-lbs), not motor wattage, so it cannot be compared directly against Greenworks' 1500W figure
- The 7.5Ah pack that earns the runtime claim is also the expensive one to replace
your yard is under a quarter acre. You would be paying for 420Wh of headroom you will never discharge, and a 20 in push mower cuts the same grass.
How it scores
Scores are our editorial weighting of the published specs above, not a test result. They are deliberately kept out of this page's structured data.
Where to buy the tools on this page
Every link below is an Amazon affiliate link. We show no price we have not verified today, so where there is no live figure the link says "check price" and takes you to the listing to read it there.
Best overall
EGO Power+ Z6 42" Zero Turn ZT4204L
EGO · EGO 56V ARC Lithium
Best two-bay runtime
Kobalt 80V Max 21" Self-Propelled (dual-port)
Kobalt · Kobalt 80V Max
Best overall
EGO Power+ 21" Select Cut LM2135SP
EGO · EGO 56V ARC Lithium
#ad As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. How we're funded.
Common questions
What electric mower can cut two acres?
Can a walk-behind mower do two acres?
How much battery does two acres need?
Is a zero turn better than a lawn tractor for two acres?
How long does two acres take to mow?
What if my lot is bigger than two acres?
Sources
Read next
- Riding & Robot Mowers
Above an acre the question stops being which mower and starts being how many watt-hours.
- How many acres can an electric mower cut on one charge?
About 1,120Wh per acre on a 42-inch deck. How to size any electric mower to your acreage.
- Best electric riding mower for 2026
Electric zero turns ranked on installed watt-hours and the energy-per-acre figure.
- How long does it take to mow an acre?
Deck width x ground speed = square feet per minute. Worked out for 20, 21 and 42 inch decks.
- Zero turn or walk-behind: where does riding start to pay?
42 inches against 21 on the same battery platform. Coverage, energy per acre and time per acre.
- Best electric mower for a half acre to an acre
Half an acre and up, runtime is the whole problem. Ranked on installed watt-hours and acreage rating.