EGO Power+ ST1511T

After 32 hours of trimming everything from manicured lawn edges to waist-high weeds, the EGO ST1511T never disappointed. The PowerLoad system lets you load new line in under 10 seconds — just thread it through and press a button. The 15-inch cutting swath covers ground quickly, and the Rapid Reload bump feed works reliably even in thick grass. At just 9.5 lbs, it is light enough for extended use, yet the build quality feels premium. The split-shaft design also makes storage and transport easy. For most homeowners, this is the only trimmer you will ever need.

Full Specifications

PowerLoad Line System

If you have ever spent 10 minutes kneeling in grass, feeding trimmer line through tiny eyelets, and cursing as it tangles for the third time, the PowerLoad system will feel like magic. EGO eliminated the entire traditional reload process with a brilliantly simple mechanism: thread a length of line through the head, press a button on the side of the trimmer, and the motor winds it perfectly in under 10 seconds.

We tested the PowerLoad system 47 times over our review period, simulating everything from a careful homeowner reload to a rushed mid-job swap when the line snapped on a hidden fence wire. In every case, the system wound the line evenly and at the correct tension. There were no tangles, no uneven spools, and no waste. We compared it side-by-side with a traditional bump-head trimmer: the EGO reload took 8 seconds on average, while the bump-head took 4 minutes and 12 seconds including untangling and re-threading.

The 0.095-inch line diameter is the sweet spot for residential use — thick enough to handle moderate weeds and edging against hardscape without snapping every five minutes, yet thin enough to spin efficiently and not bog down the motor. We tested it against a competitor using 0.080-inch line and found the EGO line lasted roughly 40% longer before requiring replacement, simply because it did not break as easily on fence posts and pavers.

Cutting Performance

The 15-inch cutting swath strikes a practical balance. Wider swaths (17+ inches) cover more ground but add weight and make precise edging harder. Narrower swaths (12 inches) feel nimble but require more passes. At 15 inches, the ST1511T covers residential edges and bed perimeters efficiently without sacrificing the precision needed around trees and fence posts.

We tested cutting power across five real-world scenarios: manicured Kentucky bluegrass edges, overgrown fescue at 8 inches tall, thick crabgrass patches, light brush along a chain-link fence, and dense weed growth behind a detached garage. In every scenario except the dense brush, the ST1511T cut cleanly on the first pass. The brush required two passes, which is expected — trimmers are not brush cutters. No stallouts, no motor bogging, no visible slowing of the head speed.

The Rapid Reload bump feed is a backup to PowerLoad, not the primary system. When the line wears down during use, a light tap on the ground extends more line automatically. We found the bump feed reliable and responsive — no double-tapping required, and no over-feeding that wastes line. The line extends roughly 1.5 inches per bump, which is conservative and efficient.

One standout feature is the split-shaft design that lets you flip the head 90 degrees for edging. We tested this along 200 linear feet of concrete driveway border. The edging mode creates a clean, vertical cut that looks professional without requiring a separate edger tool. The only limitation is that the guard does not fully block debris in edging mode — expect some grass clipping spray onto your shoes.

Battery Runtime

The ST1511T runs on EGO's 56V ARC Lithium battery platform — the same batteries that power their mowers, blowers, and chainsaws. We tested runtime with three battery sizes: the 2.5 Ah compact battery, the standard 5.0 Ah battery, and the large 7.5 Ah extended battery.

On the 5.0 Ah battery (the most common choice), we averaged 42 minutes of continuous trimming in mixed grass conditions. That translates to roughly 1,200–1,500 linear feet of edging or about 3,500–4,000 square feet of perimeter trimming. For a typical 1/4-acre suburban lot, that is enough to edge the driveway, trim around beds and trees, and clean up fence lines on a single charge.

Runtime drops predictably in heavy conditions. Trimming through waist-high weeds and thick brush reduced runtime to about 32 minutes on the same 5.0 Ah battery — the motor draws more current under load, which is normal and expected. The battery fuel gauge on the tool handle gives a five-LED readout, and we found it accurate within about 5% throughout the discharge curve. No sudden drop-offs or surprise shutdowns.

Weight & Comfort

At 9.5 lbs with the battery, the ST1511T is lighter than most gas trimmers but slightly heavier than entry-level 20V competitors. The weight distribution is what matters, and EGO nailed it. The battery sits at the rear of the shaft, counterbalancing the cutting head and keeping the center of mass near your lead hand.

We tested comfort during a 45-minute continuous trimming session — longer than most homeowners ever trim in one go. At the 30-minute mark, wrist fatigue was minimal thanks to the padded overmold grip and the balanced weight. At 45 minutes, we felt some shoulder tension, which is unavoidable with any handheld tool at this weight. For comparison, a 12.5 lb gas trimmer we tested simultaneously caused meaningful wrist strain at the 20-minute mark.

The front handle is adjustable along the shaft, letting you set your grip width for your height and trimming style. Shorter testers (5'4") preferred the handle closer to the head for better leverage; taller testers (6'2") slid it rearward for a more natural stance. The trigger is large and responsive, and the safety switch is positioned naturally under your thumb. The only ergonomic quibble: the shaft is not telescoping, so overall length is fixed. At 68 inches total, it suits users from 5'2" to 6'0" comfortably. Taller users may prefer a longer shaft.

Build Quality

The ST1511T feels like a tool designed by people who actually trim lawns for a living. The shaft is a rigid aluminum tube with a matte black finish that resists scratches and does not show grass stains. After 32 hours of use including deliberate bumps against fence posts, concrete curbs, and tree trunks, the shaft finish is only slightly scuffed — no dents, no flex, no loosening of joints.

The cutting head housing is a glass-reinforced nylon that survived repeated impacts with pavers and rocks without cracking. We intentionally smacked the head against a concrete curb 20 times at full speed — the housing showed cosmetic scuffing but no structural damage. The line guide eyelets are metal, not plastic, which means they will not wear through after a season of heavy use.

The 5-year warranty is best-in-class for cordless trimmers. Most competitors offer 3 years, and budget brands offer 1–2 years. EGO's warranty covers the tool, motor, and battery (if purchased as a kit). We have long-term tested EGO tools from previous model years, and the build quality has been consistent — these are not disposable tools designed to last one season.

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Frequently Asked Questions