Guides
A cordless yard tool kit for an acre
An acre is about 110 minutes of walking behind a mower. That one number decides the whole kit.
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.
An acre is the size at which a cordless yard changes shape. Below it, the kit is a mower, a trimmer and a blower, and the only question is which platform. At an acre, the mower question splits in two and takes the rest of the budget with it.
The short answer
The mower decision, in minutes
Both machines cut the acre. What separates them is how long you spend doing it.
The energy runs the other way: about 640Wh per acre for the walk-behind against about 1,120Wh for the zero turn. You are buying time with energy and money, which is a perfectly reasonable trade at an acre — it is simply worth making deliberately.
1. The mower, sized to the acre
If you will walk it: the Kobalt 80V self-propelled carries two 80V 4.0Ah packs — 640 nameplate watt-hours — and is the only walk-behind in our registry its maker rates for a full acre. Seven drive speeds, a 21 inch steel deck, and a 60 to 90 minute recharge.
#ad Check the Kobalt 80V Max 21" Self-Propelled (dual-port) price on Amazon — how we're funded.
If you will ride it: the RYOBI ZR3 42 inch zero turn carries two 80V 14Ah packs (2,240Wh) and publishes up to 2 acres in ECO mode, with four brushless motors and a 5-year warranty. That is double the coverage an acre needs, which is the margin that makes a rider comfortable rather than marginal.
#ad Check the RYOBI ZR3 80V HP Brushless 42" Zero Turn Riding Mower price on Amazon — how we're funded.
The full comparison of electric riders is in best electric zero turn mowers; the walk-behind alternatives are in best mowers for large yards.
2. The trimmer, for what the mower cannot reach
An acre has a lot of edge: fence lines, tree rings, a mailbox post, the awkward strip by the shed. The RYOBI RY402110 adjusts its swath from 15 to 17 inches, claims up to 67 minutes on a 40V 6.0Ah pack and weighs 8.8 lb bare on a carbon fiber shaft.
Sixty-seven minutes is generous for an acre's edges, which is the point: the trimmer should not be the tool that runs out.
#ad Check the Ryobi 40V HP Whisper 17" Carbon Fiber RY402110 price on Amazon — how we're funded.
3. The blower, for the hard surfaces
Clippings on a drive and leaves on a path are what a blower is for. The RYOBI RY404100 publishes 730 CFM, 190 MPH across three speed tips, 57 dB and 30 minutes on high or 120 on low from two 40V 4.0Ah packs.
Fifty-seven decibels is the quietest published figure in our blower registry, which matters more on an acre than on a small lot — you will be out there longer.
#ad Check the Ryobi 40V HP Whisper Series 730 CFM RY404100 price on Amazon — how we're funded.
The platform question at this size
At an acre the mower and the handhelds often end up on different platforms, and that is acceptable in a way it is not on a small lot. A rider is a standalone purchase with its own packs; the trimmer and blower want to share with each other.
| Tool | What the acre needs | Published figure on our pick |
|---|---|---|
| Mower (walk-behind) | About 640Wh of energy, 2 hours of walking | Kobalt 80V: 640Wh, rated up to 1 acre |
| Mower (zero turn) | About 1,120Wh, around 40 minutes | RYOBI ZR3: 2,240Wh, up to 2 acres in ECO |
| Trimmer | An hour of edge work | RYOBI RY402110: up to 67 min, 15-17 in swath |
| Blower | Drives, paths and a patio | RYOBI RY404100: 730 CFM, 57 dB, 120 min low |
Figures transcribed from the manufacturers' pages cited in the sources below; energy-per-acre and timing figures are our arithmetic, with the speed assumptions stated above.
What an acre does not need
- A backpack blower. Handheld airflow at 730 CFM covers an acre's hard surfaces; the backpack format is for leaf volume, not lawn size.
- A second mower. One machine sized correctly beats two compromises, and storage at this size is already a problem.
- A robot mower, in most cases. Only one robot in our registry publishes a working area above an acre — see robot mowers for one acre.
The order to buy in
- Measure the grass, not the lot. An "acre" is often two thirds of one once the house, drive and beds come out.
- Decide walk or ride, using the 126 minutes against 39 minutes above.
- Buy the mower with the largest pack configuration offered.
- Add the trimmer, then the blower, on one shared handheld platform.
- Add a spare pack before you add a fourth tool.
The smaller version of this kit is a cordless kit for a small property, and the general buying order is in your first cordless yard kit.
What we cannot tell you
We have not run this kit across a season. The mowing-time figures rest on our own speed assumptions, stated above, because no manufacturer publishes a walking pace. The 640Wh-per-acre figure comes from two manufacturers' acreage ratings, not from a measurement, and neither states the grass conditions behind it. And no maker publishes how any of these runtimes degrade as packs age.
The products discussed
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.
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.
RYOBI ZR3 80V HP Brushless 42" Zero Turn Riding Mower
RYOBI · Ryobi 80V · Our score 8.5/10
#ad No verified live price right now, so we show none rather than a stale one. How we're funded.
Two 80V 14Ah packs and a published 2 acres in ECO mode -- the same 1,120 watt-hours per acre the EGO Z6 implies.
Published specs
| Deck | 42 in, 12-gauge fabricated steel |
|---|---|
| Motors | Four brushless |
| Batteries | 2 x 80V 14Ah (2,240Wh) |
| Coverage claim | Up to 2 acres in ECO mode |
| Gas-equivalent claim | Power of a 25 HP gas engine |
| Towing | Front and rear 2 in hitch, up to 250 lb |
| Charging | On-board charging |
| Warranty | 5 years |
| Top speed / blade speed / weight | Not published |
| Cut height range | Not published |
Source: ZR3 80V HP Brushless 42" Zero Turn Riding Mower Kit, ryobitools.com
80V x 14Ah = 1,120Wh per pack, and the machine carries two: 2,240Wh. RYOBI publishes up to 2 acres in ECO mode, so 2,240 / 2 = 1,120 watt-hours per acre. The EGO Z6 carries the same 2,240Wh for the same published 2 acres. Two manufacturers, two platforms, identical energy per acre -- which is the strongest evidence we have that 1,120Wh per acre is what an electric zero turn actually costs.
What the numbers favor
- 2,240Wh on board, the largest pack set in our registry
- Coverage claim is qualified with the mode it was measured in (ECO), which EGO does not do
- Four independent brushless motors
- 5-year warranty, the longest of the three zero turns
- On-board charging -- no separate charger to find shelf space for
What they don't
- No published top speed, blade speed, weight or cut-height range
- Ryobi 80V is a separate platform from Ryobi's 40V handheld line, so nothing shares packs
- 2 acres is the ECO figure; RYOBI publishes no runtime for its other modes
your lawn is under about half an acre. A zero turn is a storage and money commitment that a walk-behind answers for a fraction of both.
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.
Ryobi 40V HP Whisper 17" Carbon Fiber RY402110
Ryobi · Ryobi 40V · Our score 8.6/10
#ad No verified live price right now, so we show none rather than a stale one. How we're funded.
67 published minutes and a swath you can dial from 15 to 17 inches -- the only adjustable-swath trimmer here.
Published specs
| Cutting swath | Adjustable 15-17 in |
|---|---|
| Line | 0.095 in bump feed |
| Shaft | Carbon fiber |
| Battery (kit) | 40V 6.0Ah |
| Runtime claim | Up to 67 min |
| Weight | 8.8 lb bare / 12.9 lb with 6.0Ah |
| Length | 72.25 in |
Source: 40V HP Brushless 17" String Trimmer (RY402110), ryobitools.com
40V x 6.0Ah = 240Wh. 67 minutes from 240Wh is about 3.6Wh per minute -- the most efficient published figure of the three trimmers here.
What the numbers favor
- 67 minutes published, more than double the EGO kit's 30
- Swath adjusts 15-17 in, so tight borders and open verge get the same tool
- Best published watt-hours per minute of the trimmers on this page
- Whisper Series noise engineering, same line as the 57 dB blower
What they don't
- 12.9 lb with the 6.0Ah pack fitted -- the heaviest trimmer here, and it is held at arm's length
- Ryobi publishes no noise figure for this specific model
- Bump feed, not an automatic reload head
you have wrist or shoulder trouble. 12.9 lb on the end of a 72 in shaft is a lot of leverage, whatever the runtime says.
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.
Ryobi 40V HP Whisper Series 730 CFM RY404100
Ryobi · Ryobi 40V · 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.
57 dB published at 730 CFM. That is the lowest published noise figure on this page and it is not close.
Published specs
| Max air volume | 730 CFM |
|---|---|
| Max air speed | 190 MPH |
| Speed tips | 160 / 175 / 190 MPH |
| Noise | 57 dB |
| Batteries (kit) | 2 x 40V 4.0Ah |
| Runtime | 30 min high / 120 min low |
| Weight | 9.4 lb |
Source: 40V HP Brushless Whisper Series 730 CFM Blower (RY404100), ryobitools.com
Decibels are logarithmic: a 7 dB drop is roughly a 5x reduction in sound intensity, and is perceived as roughly half as loud. Both figures are manufacturer-published under their own test conditions, so treat the gap as directional, not lab-comparable.
What the numbers favor
- 57 dB published -- the quietest figure any manufacturer on this page publishes
- 730 CFM while doing it, second only to the 765 CFM EGO
- Ships with two 4Ah packs (320Wh total) in the kit
- Publishes high AND low runtimes rather than an average
What they don't
- 9.4 lb is the heaviest published handheld weight here, roughly double the EGO LB7650 bare
- Manufacturer noise figures are measured under each brand's own conditions -- not a like-for-like lab comparison
you need to move soaked leaves off a large property fast. Quiet costs air speed, and 190 MPH is the lowest peak here.
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 two-bay runtime
Kobalt 80V Max 21" Self-Propelled (dual-port)
Kobalt · Kobalt 80V Max
Best documented acreage claim
RYOBI ZR3 80V HP Brushless 42" Zero Turn Riding Mower
RYOBI · Ryobi 80V
Best runtime
Ryobi 40V HP Whisper 17" Carbon Fiber RY402110
Ryobi · Ryobi 40V
Best quiet blower
Ryobi 40V HP Whisper Series 730 CFM RY404100
Ryobi · Ryobi 40V
#ad As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. How we're funded.
Common questions
What yard tools do I need for an acre?
Can a cordless walk-behind mower handle an acre?
Is a zero turn worth it for one acre?
How many batteries do I need for an acre?
What should I buy first?
Sources
- Kobalt 80-volt Max Brushless 21-in Self-propelled Cordless Lawn Mower, lowes.com
- ZR3 80V HP Brushless 42" Zero Turn Riding Mower Kit, ryobitools.com
- RYOBI 40V HP Whisper Series 17" Carbon Fiber String Trimmer (RY402110), ryobitools.com
- RYOBI 40V HP Whisper Series 730 CFM Blower (RY404100), ryobitools.com
Read next
- Guides
The questions that come before the shopping. Answered in the first paragraph, then explained.
- Your first cordless yard kit, in the order to buy it
The buying order, why the mower sets the platform, and the watt-hours a full Saturday needs.
- The cordless yard kit for a small property
Fewer tools, smaller packs, one platform. What a small lot actually needs.
- What size mower do I need for my yard?
Deck width and watt-hours by lawn size, with the mowing-time arithmetic for each.
- Best electric zero turn mower
Deck, battery capacity and acreage for three electric zero turns, converted to watt-hours 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.