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Official hardware profile for the Greenworks ST40L03.

String Trimmers & Weed Eaters Tier: flagship Audited: October 2026 Updated: October 24, 2026

Greenworks ST40L03

Name: Greenworks 40V 16 in Cordless String Trimmer, Tool Only
Brand: Greenworks
Rating: 3.8 (36 reviews)

Greenworks 40V 16 in Cordless String Trimmer, Tool Only - High-performance String Trimmers & Weed Eaters delivering empirical benchmark reliability.

Runner-Up Contender in "Most Powerful Gasoline - Powered String Trimmers" →

Spec Benchmark

ScoreMet Evaluation

75 /100

Perf: 83/100

Value: 82/100

Deterministic Spec Score

Buyer Signals

Owner Consensus

81%

Positive Consensus

26 verified owner reports

Data Integrity

Evidence Confidence

Moderate Confidence

Complete Specs Verified

MSRP Benchmark: $171.29

Check Prices & Where to Buy ↓ Explore Score Breakdown ↓ Compare vs Others

Faceted Tags:

#Brushless Motor #1/2" Metal Chuck #Compact Drill #Greenworks Cordless

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Quick Verdict

String Trimmers Benchmark Model v1 evaluation: Outstanding Performance score with verified metric-based benchmark calculations.

Key Strengths

+ Balanced all-around performance across key operational metrics

Key Limitations

− No severe disqualifying technical deficiencies observed

ScoreMet In-Depth Editorial

By ScoreMet Editorial Team • Updated: October 24, 2026

Greenworks ST40L03: Complete Engineering & Practical Evaluation

An exhaustive technical evaluation based on manufacturer engineering specifications, independent teardowns, and jobsite ergonomics.

1. Overview & Market Positioning

The Greenworks ST40L03 positions itself as a capable battery powered string trimmer engineered for residential property maintenance and light clearing operations. It serves discerning property owners who demand dependable zero - emission performance without the maintenance overhead of internal combustion engines.

2. Motor Performance & Power Delivery

The unit operates at a maximum rotational speed of 6000 rpm, driving a generous 16 - inch cutting swath to maximize operational efficiency during standard trimming cycles. Powered by a 40V platform architecture, it delivers strong sustained output and features a rapid line loading mechanism that facilitates quick reloads in seconds.

3. Ergonomics, Balance & Lighting

Weighing 11.3 pounds bare, the chassis features resilient material integrity designed to withstand regular property maintenance tasks. Greenworks reinforces structural confidence by backing the ST40L03 with a comprehensive 3 - year manufacturer warranty, which aligns with category benchmarks for consumer - grade battery tools.

4. Chuck Quality & Bit Retention

Retailing at an MSRP of 171.29 dollars as a tool - only package, this model delivers competitive utility through its universal attachment head system capability. While users must factor in the additional cost of a battery and charger if they lack existing 40V ecosystem hardware, the inclusion of rapid line loading enhances its overall feature - to - price ratio.

5. Battery Ecosystem & Runtime Stamina

User satisfaction is supported by balanced ergonomics that distribute the 11.3 - pound weight load effectively across its 65.35 - inch operational length. Although operators note a minor break - in period required for optimal control familiarity, the overall handling comfort meets expectations for extended weekend trimming sessions.

Owner Consensus & Verifiable Sentiment

Real-World Long-Term Reliability

Synthesized across 26 verified owner reports from retail and trade communities.Captured: Sep 16, 2026

81%

Positive
Consensus

Owner reports indicate the Greenworks 40V 16 - inch cordless string trimmer operates as a capable consumer - grade landscaping tool suited for standard residential yard maintenance. Field feedback highlights reliable power output and universal attachment compatibility, though long - term reliability concerns regarding proprietary power cells persist among specific users.

Aspect-Based Reliability Breakdown

Segmented positive vs. negative feedback distribution across verified owner reports

Empirical Buyer Consensus

Quality11

82% Pos (9)|18% Neg (2)

Owner reports indicate solid consumer - grade build tolerances that deliver reliable performance for typical home maintenance applications.

Battery Life6

67% Pos (4)|33% Neg (2)

Operational duration receives mixed reviews, balancing efficient discharge rates with occasional reports of premature power cell failure.

Functionality9

89% Pos (8)|11% Neg (1)

Field telemetry demonstrates high cutting efficiency and broad compatibility with third - party multi - tool attachments.

Most Common Praises (In the Field)

Balanced Structural Ergonomics

Owner feedback suggests the unit maintains a secure balance when loaded with a compatible 40V power cell, facilitating manageable handling during extended clearing tasks.

9 corroborating signals

Universal Attachment Integration

Field operation confirms the shaft accepts standard off - the - shelf universal lawn care attachments, expanding functionality beyond basic trimming without proprietary limitations.

8 corroborating signals

Sustained Runtime Efficiency

Reports indicate that pairing the tool with a 6Ah power source delivers sufficient operational duration, dropping only one of four charge bars after twenty minutes of active cutting.

4 corroborating signals

Reported Pain Points & Trade-offs

!Power Cell Replacement Expense

Owner logs note that acquiring OEM replacement batteries and charging hardware involves significant financial investment relative to the base tool cost.

2 corroborating signals

!Power Cell Long - Term Reliability

Isolated long - term feedback points to sudden cell failures or charging circuit faults, resulting in non - functional power units requiring complete replacement.

2 corroborating signals

Review Evidence & Platform Cross-Check

Cross-check customer reviews and inspect owner feedback directly on the original platforms.

Inspect on Amazon

Evidence Transparency & Historical Snapshot Notice: Scoremet does not republish copyright-protected customer review bodies or host unverified star ratings. Our Consensus Engine computes statistical topic clusters across verified buyer reports as an empirical snapshot captured on Sep 16, 2026. Manufacturing batches, hardware revisions, and user experiences evolve over time; ScoreMet disclaims representations beyond this capture date. Deep links above allow independent verification on original trade platforms.

Scoremet Metrics Breakdown

Every metric is computed deterministically from manufacturer specifications and deterministic scoring formulas. Click any metric to view calculation logic.

Scoring Engine:

Evidence Confidence:Moderate

Score Met

75/100

OVERALL SCORE

Performance & Power Output25% weight

83 / 100 (20.8 pts)

Build Quality & Structural Durability20% weight

70 / 100 (14.0 pts)

Value & Market Competitiveness20% weight

82 / 100 (16.4 pts)

Ergonomics & User Experience25% weight

68 / 100 (17.0 pts)

Brand Track Record & Reliability10% weight

70 / 100 (7.0 pts)

Technical Specifications & Catalog 100% Traceable Hardware Evidence

Audited hardware catalog with manufacturer specifications and deterministic scoring.

View Sources ↓

CUTTING SYSTEM

Cutting Swath

16 (in)

MFR

VERSATILITY

Attachment Head System

Yes

MFR

COMMERCIAL

MSRP

$171.29 (USD)

MKT

ADDITIONAL SPECS

Upc

195526041535 MFR

Asin

B0BFB1F3JM MFR

Size

16" Trimmer (Tool Only) Gen 2 MFR

Brand

Greenworks MFR

Color

Green MFR

Speed

6000 rpm MFR

Pattern

Trimmer MFR

Brand Name

Greenworks MFR

Style Name

String trimmer MFR

Unit Count

1 Count MFR

Item Weight

11.3 pounds MFR

Model Number

ST40L03 MFR

Power Source

Battery Powered MFR

Cutting Width

16 inches MFR

Item Type Name

String trimmer MFR

Manufacturer

Greenworks MFR

Model_number

ST40L03 MFR

Bare Weight Lbs

11.3 MFR

Number Of Items

1 MFR

Best Sellers Rank

#38,351 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #139 in String Trimmers MFR

Customer Reviews

4.4 4.4 out of 5 stars (39) MFR

Item Dimensions L X W

65.35"L x 11.81"W MFR

Manufacturer Part Number

ST40L03 MFR

Recommended Uses For Product

Trimming MFR

Manufacturer Warranty Description

3 year manufacturer MFR

Specification Audit Standard: Specifications are compiled from official manufacturer engineering documentation and corroborated against independent testing and trade consensus.

ScoreMet Methodology →

Source Tiers: MFR Manufacturer Official IND Independent Testing OWN Owner Consensus MKT Market Pricing SM-V ScoreMet Verified

Who Should Buy It?

Users seeking a balanced string-trimmers with proven performance scores.

Who Should Skip It?

Users requiring ultra-specialized niche capabilities outside standard category workloads.

ScoreMet Evaluated

Frequently Asked Questions: Greenworks ST40L03

Technical clarifications, battery compatibility, and practical purchase guidance based on ScoreMet's evaluation data.

1 How does the Greenworks ST40L03 rate in the String Trimmers & Weed Eaters specification scoring?

The Greenworks ST40L03 achieved an overall ScoreMet rating of 75/100, positioning it among the competitive contenders in the String Trimmers & Weed Eaters category with specification-based evaluation.

2 What are the key advantages and drawbacks of the ST40L03?

Key strengths include balanced all-around performance across key operational metrics. Notable limitations to consider before buying: no severe disqualifying technical deficiencies observed.

3 Does the Greenworks ST40L03 come with a battery and charger?

The standard retail package is typically sold as a bare tool (tool body only) unless designated with a kit SKU. Check specific retailer bundles if you require included lithium-ion battery packs and a rapid charger.

4 Is the Greenworks ST40L03 suitable for professional jobsite use?

The Greenworks ST40L03 is best suited for serious DIYers and moderate trade applications where extreme continuous industrial duty cycles are not required daily.

Verified Field Consensus

Community Reviews & Reputation Index

Real-world observations from verified professionals, field specialists, and hands-on owners.

How Reputation Works

+10 pts / helpful upvote

•Earn +10 Reputation Points whenever other members upvote your hands-on field report as helpful.

•Accumulate points to unlock higher contributor tiers, verified trade badges, and Master Craftsman credentials.

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Video Review & Demonstration

Workshop and jobsite demonstration

Independent creator demonstrationsMore Tests

Price Check

Current Amazon price against the history we have recorded

Real Deal

Current price vs baseline

-10.1%

10.1% below the Amazon typical price

Price tracking started. The chart appears after two days of observations.

Priced well below its observed baseline and at or near the lowest price we have recorded.

Current price is 10.1% below the typical reference.
Current price is at or near the lowest observed in 90 days.
Limited price history (1 observations over 22.3 days).

Early signal based on 1 observations over 22.3 days.

All string trimmers & weed eaters deals, checked against price history

Price checked 22 days ago. Prices change; confirm at checkout.

Check current price

Where to Buy

Authorized retailers and merchant availability

Amazon Popular Choice

Check Live Availability

Check Live Price

Direct on Amazon.com

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Head-to-Head Comparisons

Empirical metric showdowns against String Trimmers & Weed Eaters alternatives.

Verified

Key Benchmark Matchups

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Score: 75 Rival: 76

Full Report

Custom Matchup Selector

ScoreMet Telemetry Guarantee

Our ratings are strictly calculated from manufacturer specifications using deterministic scoring formulas. Retailer commissions never alter any score or editorial ranking.

Read Verification Methodology →