Lawn & Garden

RYOBI 40V HP Brushless 15" Cordless String Trimmer (RY40290VNM)

Name: RYOBI 40V HP Brushless 15" Cordless String Trimmer (RY40290VNM)
Rating: 8.2 (1 reviews)

Best Ryobi Battery Trimmer

The RYOBI 40V HP Brushless 15" String Trimmer is designed for the RYOBI 40V battery ecosystem — sharing batteries with RYOBI 40V mowers and blowers. Available on Amazon.ca (ASIN B09FN5M4PG) at around $149 CAD.

ClearPick Score

8.2 / 10

Very Good

Cut Power

8.0

Ecosystem

8.5

Value

8.5

Weight

8.5

Build Quality

8.0

Full Specs

Voltage	40V HP
Cutting Swath	15"
Line Diameter	.080" dual line
Line Feed	Bump feed
Motor	HP Brushless
Shaft	Straight composite shaft
Weight	~6.7 lb with battery
Variable Speed	Yes
Battery	Compatible with RYOBI 40V (NOT 18V ONE+ — different system)
Ecosystem	RYOBI 40V

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🏆 Best Ryobi Battery Trimmer

RYOBI 40V HP Brushless 15" Cordless String Trimmer (RY40290VNM)

~$149 CAD est. on Amazon.ca

View on Amazon.ca → Opens Amazon.ca · Affiliate link

✅ Ships to Canada

✅ Prime eligible (most orders)

✅ 30-day Amazon returns

✅ No extra cost to you

📖 See our guideBest Lawn Mowers in Canada: Gas, Electric, and Robot — Ranked by Real Owners (2025)

✅ What Works

Integrates with the RYOBI 40V ecosystem — buyers who own the RYOBI 40V HP Brushless mower or 40V blower share batteries across tools without extra chargers or purchase cost.
At ~6.7 lb with battery, it's slightly lighter than the EGO ST1521S — a small but noticeable difference during extended edge trimming along long fence lines or driveways.
Variable speed trigger gives control for different tasks — slow for careful trimming near garden beds where flying debris could damage plants, fast for open overgrowth along fences.
15" cutting swath handles typical residential edging and trimming at a pace appropriate for urban and suburban Canadian lots.

⚠️ Worth Knowing

RYOBI 40V and RYOBI 18V ONE+ batteries are physically different and not interchangeable. This is one of the most common buyer errors — many RYOBI 18V users assume compatibility and are disappointed. Confirm you're buying 40V.
.080" line diameter is lighter than EGO's .095" — it handles standard grass and light weeds well but will struggle with thicker brush or heavy overgrowth. Line replacement spools in .080" are widely available.
Battery inclusion varies by listing — tool-only models are common. Existing 40V users get excellent value; new buyers must budget for a 40V battery and charger separately.
Not compatible with RYOBI attachment accessories the way EGO's split shaft is — this is a straight shaft trimmer with no attachment expansion option.

What Real Buyers Are Saying

What buyers love

"Already own a RYOBI 40V mower and blower — this trimmer added to my setup for under $150 and uses the same batteries. No-brainer."
Source: Amazon reviewer

"Lightweight and easy to handle for extended edge trimming. My older corded trimmer was exhausting by comparison."
Source: Amazon reviewer

"Clean edge along my fence line on the first pass. Works exactly as expected for a weekly maintenance trimmer."
Source: Reddit

"Easy line loading once you figure it out. The bump head works reliably on my third season."
Source: Amazon reviewer

Common complaints

40V and 18V batteries are not…

40V and 18V batteries are not compatible — I wasted a week thinking my 18V ONE+ batteries would work in this trimmer. They look different but I didn't notice until I tried to charge.

Source: Amazon reviewer

Line diameter is lighter than EGO…

Line diameter is lighter than EGO — struggles on thicker weeds along my back fence. Fine for regular maintenance trimming though.

Source: Reddit

Battery not included in tool-only listing…

Battery not included in tool-only listing — make sure you already have a 40V battery. The kit version is the safer purchase.

Source: Amazon reviewer

Can't handle heavy overgrowth after…

Can't handle heavy overgrowth after a missed week in August. Had to make two passes. EGO would handle it in one.

Source: Amazon reviewer

ClearPick Verdict

The RYOBI 40V HP Brushless string trimmer is the right choice for buyers already in the RYOBI 40V ecosystem — battery sharing with the mower and blower makes the total cost compelling. For fresh buyers comparing it to the EGO ST1521S, the lighter .080" line, lack of attachment compatibility, and similar price make the EGO the stronger standalone purchase. The 40V/18V battery confusion is genuinely common and worth flagging clearly before any RYOBI purchase.

RYOBI 40V HP Brushless 15" Cordless String Trimmer (RY40290VNM)

✅ What Works

⚠️ Worth Knowing

What Real Buyers Are Saying

What buyers love

Common complaints

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