Heavy Duty Brushless String Trimmers for Tough Yards
For most large properties, the DEWALT 20V MAX XR is our top pick because it pairs a high-output brushless motor with a dual-line feed that handles thick growth, but its battery runtime can be a limiting factor for very extensive areas.
A heavy duty brushless string trimmer must power through thick grass and stubborn weeds without bogging down. These models also need to resist dust and heat for years of service. We looked at specifications and owner feedback to find the most reliable options.
Brushless motors offer more torque and longer life than brushed types. They also use battery power more efficiently, which translates to longer runtime per charge. The best heavy duty models feature professional grade construction and thoughtful ergonomics.
The shortlist, ranked
DEWALT 20V MAX XR Brushless String Trimmer (DCST972X1)
The DEWALT DCST972X1 is a powerful brushless trimmer with a 15 inch cutting swath. It features a dual feed bump head that advances line with a tap. The variable speed trigger and high power mode deliver up to 6,300 RPM. It comes with a 6 Ah battery and charger.
Pros
- Excellent power for thick vegetation
- Durable construction with metal gear case
- Battery gauge on tool
Cons
- Heavier than some competitors
- Requires separate battery for extended runtime
EGO Power+ 15-Inch Commercial Grade Cordless String Trimmer (ST1623T)
The EGO ST1623T is a commercial grade trimmer with a 15 inch cutting width and a weather resistant build. It uses a 56V arc lithium battery (sold separately) and features a variable speed trigger, constant power output, and a 5 year tool warranty. Includes a rapid reload line head.
Pros
- High torque brushless motor
- Weather resistant for all seasons
- Commercial grade durability
Cons
- Battery not included
- Premium price point
Milwaukee M18 FUEL 15″ String Trimmer (2825-21HD)
Milwaukee’s M18 FUEL trimmer delivers best in class power with a brushless motor that generates up to 10,000 RPM. It has a 15 inch cutting swath and a bump feed head. The kit includes a high output 12.0 Ah battery and charger. Features a Quik-Lok system for attachments.
Pros
- Exceptional power and speed
- Accepts Quik-Lok attachments
- Flexible with M18 platform
Cons
- Heavy with large battery
- Expensive kit
Makita 36V (18V X2) LXT Brushless String Trimmer (XRU15PT1)
Makita’s XRU15PT1 uses two 18V LXT batteries to deliver 36V of power. It features a 15 inch cutting swath, a bump and feed head, and a variable speed trigger. The brushless motor provides up to 6,600 RPM. Includes a shoulder strap and two 5.0 Ah batteries.
Pros
- Balanced power from dual batteries
- Makita build quality
- Variable speed control
Cons
- Requires two batteries
- Heavier because of two batteries
Greenworks Pro 80V Brushless String Trimmer (ST80L01)
Greenworks Pro 80V trimmer offers heavy duty performance at a lower price. It has a 16 inch cutting swath and a brushless motor that delivers up to 7,000 RPM. The trimmer features a variable speed trigger and an automatic feed head. Includes a 2Ah battery and charger.
Pros
- Large cutting width
- Affordable compared to pro models
- Lightweight at 9.9 lbs
Cons
- Battery runtime may be short
- Auto feed can be less reliable
Ryobi ONE+ HP 18V Brushless String Trimmer (P20117)
Ryobi’s HP trimmer is a versatile 13 inch trimmer with brushless power. It has a variable speed trigger and a bump feed head. The attachment capable design allows use with edger, blower, and other attachments. Sold as a bare tool or kit.
Pros
- Attachment capable
- Lightweight and easy to maneuver
- Fits existing Ryobi batteries
Cons
- Narrower cutting width
- Not as powerful as bigger models
Craftsman V60 Brushless String Trimmer (CME600)
Craftsman V60 trimmer offers a comfortable grip and an adjustable handle. It features a brushless motor and a 15 inch cutting path. The bump feed head is simple to use. Includes a 2.5 Ah battery and charger. Lightweight design reduces fatigue.
Pros
- Ergonomic handle reduces fatigue
- Good power for its class
- Battery and charger included
Cons
- Not as durable as pro models
- Limited to Craftsman V60 platform
What to look for
Compared at a glance
| # | Model | Motor | Best for | Score | Price |
|---|---|---|---|---|---|
| 1 | DEWALT 20V MAX XR Brushless String Trimmer (DCST972X1) | Brushless | Best overall for most homeowners with large yards | 9.4 | Check price |
| 2 | EGO Power+ 15-Inch Commercial Grade Cordless String Trimmer (ST1623T) | Brushless | Best for commercial and large property use | 9.2 | Check price |
| 3 | Milwaukee M18 FUEL 15″ String Trimmer (2825-21HD) | POWERSTATE Brushless | Best for heavy duty cutting with high output battery | 9.0 | Check price |
| 4 | Makita 36V (18V X2) LXT Brushless String Trimmer (XRU15PT1) | Brushless | Best for users who prefer Makita ecosystem | 8.8 | Check price |
| 5 | Greenworks Pro 80V Brushless String Trimmer (ST80L01) | Brushless | Best budget friendly heavy duty option | 8.6 | Check price |
| 6 | Ryobi ONE+ HP 18V Brushless String Trimmer (P20117) | Brushless | Best for DIYers with Ryobi battery collection | 8.4 | Check price |
| 7 | Craftsman V60 Brushless String Trimmer (CME600) | Brushless | Best for ergonomic comfort | 8.2 | Check price |
Common questions
What makes a string trimmer heavy duty?
Heavy duty trimmers have brushless motors, metal gear cases, and higher cutting speeds. They handle thick grass and weeds without stalling. They are built with durable materials to withstand frequent use.
Is a brushless motor worth the extra cost?
Yes, brushless motors are more efficient, produce more torque, and last longer. They run cooler and require less maintenance. For heavy use, the investment pays off in performance and longevity.
How long does a battery last on a heavy duty trimmer?
Battery runtime varies by voltage, amp hours, and load. Typically, a 5Ah battery can last 20 to 40 minutes under heavy load. Lighter trimming extends runtime. Consider buying extra batteries for large yards.
Can I use attachments with these trimmers?
Many models are attachment capable. Brands like Ryobi, Milwaukee, and Makita offer attachment systems. Check compatibility with your trimmer model. Attachments include edgers, blowers, and pole saws.
What is the best line thickness for heavy duty trimming?
For thick grass and weeds, use line between 0.080 and 0.105 inches. Thicker line cuts better but requires more power. Most heavy duty trimmers accept up to 0.105 inch line. Check your trimmer’s specifications.
Are cordless trimmers as powerful as gas models?
Modern brushless cordless trimmers can match or exceed gas models for most tasks. They offer instant torque and no engine maintenance. For very large commercial properties, gas may still have an edge in runtime, but batteries are improving.
How do I maintain a battery powered trimmer?
Keep the trimmer clean and dry. Inspect the line head for wear. Store batteries in a cool place and avoid full discharge. Regularly check and tighten screws. Follow the manufacturer’s maintenance guide.
What is the advantage of a variable speed trigger?
A variable speed trigger allows you to adjust power to the task. For light trimming, lower speed saves battery. For thick growth, full power is available. It also improves control and reduces fatigue.
The verdict
For most homeowners with large yards, the DEWALT 20V MAX XR offers the best balance of power, durability, and brand reliability. If you need commercial grade performance and are willing to invest in a separate battery, the EGO Power+ is the top choice. Budget conscious buyers should consider the Greenworks Pro 80V.
