Most cordless string trimmers cap at 40V or 60V. So why does 80V exist? Because 60V starts to struggle on thick weeds, ditch banks, and continuous heavy use — and homeowners who deal with those conditions don't want a trimmer that bogs.
80V is the cordless tier that delivers gas-equivalent torque without the gas hassle. This guide covers when 80V is actually the right call, when 60V is enough, the spec differences that matter, and the Greenworks 80V model that hits the sweet spot for serious residential users.
What 80V Cordless Actually Delivers
Voltage in a cordless tool is the closest proxy to engine displacement in a gas tool. More voltage = more torque available at the cutting head = better performance under load. Here's what 80V delivers that lower voltages don't:
- 27cc gas-equivalent power. 80V brushless string trimmers deliver torque comparable to a 27cc gas trimmer — the size most pro landscapers use for residential cutting.
- Better performance under load. Thick weeds, wet grass, tall growth — 80V doesn't bog. The motor maintains line speed where lower-voltage motors slow down.
- Longer runtime per amp-hour. Higher voltage delivers the same work with less current draw, which extends runtime on a given battery size.
- Heavier line capability. 80V trimmers support 0.080" dual-line minimum, with some supporting 0.095" — the line diameter range that cuts through real weeds, not just grass.
- Cross-platform battery sharing. 80V batteries power 75+ Greenworks tools — mowers, blowers, chainsaws, hedge trimmers, snow throwers, pressure washers. The battery investment pays back across the entire yard kit.
Who Should Buy an 80V String Trimmer
80V is purpose-built for specific use cases. You should consider it if:
- Your yard has real weeds. Knee-high overgrowth, ditch-bank vegetation, fence-line weeds that grow between cuts — 80V cuts through without bogging.
- You have a large property (half-acre+). Larger areas mean longer trimming sessions. 80V brushless motors run cooler under continuous use than lower-voltage trimmers.
- You're already in the 80V platform. If you own a Greenworks 80V mower or blower, you already have the batteries. Adding a tool-only 80V trimmer is the cheapest path to a premium trimmer.
- You want gas-equivalent power without the gas. No fuel mixing, no pull-starting, no exhaust fumes — but the same cutting torque.
- You'll buy more 80V tools. The 80V battery investment is the most expensive part. Buy once, use it across your entire 80V tool collection.
Who Doesn't Need 80V
Honesty matters more than upselling. 80V isn't right for every yard:
- Light residential trimming on a small lot. If you cut light grass around landscaping for 15 minutes once a week, 40V or 60V is plenty. Save the money.
- Tight yards with lots of detail work. 80V trimmers are slightly heavier than 60V. If you're doing precise edging around flower beds, a lighter trimmer may feel better.
- Buyers not already in the 80V ecosystem. If you don't own other 80V tools and don't plan to, the kit cost may not be worth it vs. a quality 60V trimmer.
80V is the right buy for homeowners who deal with real overgrowth, have larger properties, or are already invested in (or planning to invest in) the 80V battery platform.
80V vs 60V vs 40V — The Real-World Difference
The voltage decision is the most important spec choice for a string trimmer. Here's what each tier delivers in actual use:
| Tier | Gas Equivalent | Line Capability | Best Use Case | Where It Struggles |
|---|---|---|---|---|
| 40V | ~20cc | 0.065"–0.080" | Light residential, small yards | Thick weeds, continuous heavy use |
| 60V | ~24cc | 0.080"–0.095" | Standard suburban, occasional weeds | Dense brush, ditch banks |
| 80V | ~27cc | 0.080"–0.095" (some 0.105") | Heavy weeds, large yards, brush | Premium pricing, slightly heavier |
For homeowners moving from a 27–30cc gas trimmer to cordless, 80V is the only tier that matches the performance you're used to. 60V will feel like a slight downgrade. 80V doesn't.
The Best 80V String Trimmer from Greenworks
For homeowners who want the strongest cordless trimmer in the Greenworks lineup — gas-equivalent torque, brushless reliability, and the option to buy tool-only if you're already in the 80V platform — the Greenworks 80V 16" Brushless String Trimmer (Tool Only) is the flagship 80V trimmer:
| Spec | Greenworks 80V 16" Brushless (Tool Only) |
|---|---|
| Voltage | 80V (27cc gas equivalent) |
| Motor | Brushless, front-mounted |
| Cutting width | 16" |
| Line diameter | 0.080" dual-line bump feed |
| Shaft | Straight aluminum |
| Trigger | Variable speed |
| Battery included | No (tool only) |
| Compatible batteries | All Greenworks 80V batteries (2.0Ah – 8.0Ah) |
| Runtime | Up to 45 min (2.0Ah) / up to 90 min (4.0Ah) / up to 180 min (8.0Ah) |
| Warranty | 4-year tool |
A few details that matter specifically for the 80V buyer:
Tool-only purchase saves money if you're already in the platform. A kit with battery and charger runs ~$200 more than the tool-only version. If you already own an 80V mower, blower, or chainsaw, you don't need another battery — buy the tool only and save.
27cc gas-equivalent performance. The 80V brushless motor delivers torque comparable to a 27cc gas trimmer — the size most pro landscapers use for residential brush. This isn't marketing copy; it's an industry-standard performance benchmark.
0.080" dual-line bump feed. Dual line means twice the cutting surface per rotation, which translates to faster cuts in heavy material. The bump-feed head releases fresh line on demand — no automatic feed electronics to fail.
Brushless front-mounted motor. Brushless motors run cooler under heavy load, last 2–3x longer than brushed motors, and deliver more torque per watt. The front-mount design shifts weight forward, making the trimmer feel lighter during longer sessions.
Battery flexibility. The tool runs on any Greenworks 80V battery — 2.0Ah for short jobs, 4.0Ah for normal use, 8.0Ah for half-acre+ properties or commercial-grade runtimes. Pick the battery to match your yard, or use the batteries you already own from other 80V tools.
Battery Ecosystem Advantage
The hidden value of buying into 80V isn't the trimmer — it's everything else.
The 80V battery powers 75+ Greenworks 80V tools: lawn mowers, leaf blowers, chainsaws, pole saws, hedge trimmers, snow throwers, cultivators, pressure washers, and more. Buy a single 80V battery once, and you've already paid for the batteries you'd need for any of those tools — saving $150–$300 per additional tool purchase.
Tool-only purchases (like this trimmer) are how serious 80V users build out their tool collection. Buy the first 80V tool as a kit with battery and charger, then add additional tools as tool-only purchases. The math works out dramatically better than buying every tool as a kit.
FAQ
Is 80V really better than 60V for a string trimmer?
If you have real weeds, brush, or trim large areas — yes. 80V delivers ~13% more torque equivalent and noticeably better performance under continuous load. If you cut light grass on a small lot, 60V is plenty.
Can an 80V cordless trimmer replace my gas trimmer?
For most residential users, yes. The Greenworks 80V 16" delivers 27cc gas-equivalent power, handles thick weeds without bogging, and runs up to 3 hours on a single 8.0Ah battery. Where gas still wins: 8-hour commercial use and off-grid applications.
How long does an 80V string trimmer run on one battery?
Depends on the battery: ~45 minutes on a 2.0Ah, ~90 minutes on a 4.0Ah, and up to 3 hours on an 8.0Ah battery. Light grass extends runtime; heavy weeds shorten it.
Should I buy a tool-only or a kit?
If you already own a Greenworks 80V battery from another tool — buy tool-only and save $200+. If this is your first 80V purchase, buy the kit so you get the battery and charger included.
Can I use any Greenworks battery with the 80V trimmer?
Only 80V batteries. Voltages aren't interchangeable across the Greenworks 24V/40V/60V/80V platforms — you can't run an 80V tool on a 60V battery or vice versa. But any 80V battery (2.0Ah, 4.0Ah, 8.0Ah) works in any 80V tool.
Is the trimmer too heavy for older or smaller users?
The 80V 16" weighs ~10 lbs with a 2.0Ah battery — slightly heavier than 40V or 60V trimmers but not significantly. The front-mount design balances the weight forward, which feels lighter than the spec suggests. Try it in-store if you're unsure.
The Strongest 80V Trimmer Buy
If you need gas-equivalent torque, deal with real weeds, or you're already in the 80V battery platform, the Greenworks 80V 16" Brushless String Trimmer (Tool Only) is the right pick. 27cc gas equivalent, 0.080" dual-line, brushless front-mount motor, variable speed trigger, and full compatibility with the entire Greenworks 80V battery ecosystem. Tool-only pricing means you save by skipping a battery you don't need.
Keep reading:
- One Battery System Saves You Money — The Greenworks Ecosystem — Why staying inside one battery platform saves Canadian homeowners hundreds.
- Greenworks 80V vs EGO 56V — The Battery Showdown — Battery technology, power delivery, and ecosystem compared.
- Greenworks vs Ryobi — A Canadian Buyer's Comparison — Power, price, battery tech, and Canadian availability compared.
- Greenworks Lawn Mower Review — Every Model for 2026 — Pair your 80V trimmer with the right 80V mower.