EGO
EGO Power+ 56V 15" String Trimmer with POWERLOAD (ST1521S)
$200 - $300 (kit)
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Pros & Cons
What We Like
- POWERLOAD line winding is a category-defining feature
- 56V battery delivers genuine gas-rivaling torque
- Shares battery with the entire EGO 56V outdoor ecosystem
- Variable trigger gives fine control for edging work
Watch Out For
- Premium price vs entry battery trimmers
- Heavy compared to corded or smaller-battery competitors
- Replacement batteries are $200+ when they wear out
Best For
Homeowners who already own or want to start an EGO 56V battery ecosystem and want gas-level performance.
The Owner-Style Take
Opinion
My read: EGO Power+ 56V 15" String Trimmer with POWERLOAD (ST1521S) is not a universal recommendation. It earns its place when the use case is narrow and real: Homeowners who already own or want to start an EGO 56V battery ecosystem and want gas-level performance.
The reason to keep it on the shortlist is POWERLOAD line winding is a category-defining feature. The reason to slow down before buying is premium price vs entry battery trimmers. I would not treat the star rating as the decision; I would treat the yard, storage, maintenance tolerance, and five-year cost as the decision.
If you are deciding between this and DeWalt 60V FlexVolt 17" Brushless Cordless String Trimmer (DCST972), start with the failure mode you are trying to avoid. Pick EGO Power+ 56V 15" String Trimmer with POWERLOAD (ST1521S) when the notes below describe your lawn more closely; pick DeWalt 60V FlexVolt 17" Brushless Cordless String Trimmer (DCST972) when its compromises sound easier to live with.
Pick It Over
- Pick EGO Power+ 56V 15" String Trimmer with POWERLOAD (ST1521S) over DeWalt 60V FlexVolt 17" Brushless Cordless String Trimmer (DCST972) when you want a dedicated outdoor battery platform and do not need DeWalt attachments or a 17-inch swath.
- Pick EGO Power+ 56V 15" String Trimmer with POWERLOAD (ST1521S) over Milwaukee M18 FUEL Quik-Lok String Trimmer (2825-21ST) when you want the easiest standalone trimmer and are not already invested in M18 packs or Quik-Lok attachments.
- Pick EGO Power+ 56V 15" String Trimmer with POWERLOAD (ST1521S) over Greenworks Pro 80V 16" Brushless String Trimmer (ST80L210) when POWERLOAD and EGO ecosystem breadth matter more than Greenworks value pricing.
Skip If
- - You are already locked into a different battery platform and do not want another charger and pack family.
- - Premium price vs entry battery trimmers
- - Heavy compared to corded or smaller-battery competitors
Five-Year Cost
Estimated five-year cash outlay: $290-$550. That includes the current street-price range plus string, blades or heads, and a possible battery refresh if this becomes your main yard tool; it does not assume a paid repair shop unless the category commonly forces one.
EGO Power+ 56V 15" String Trimmer with POWERLOAD (ST1521S): Editorial Assessment
The ST1521S is the trimmer I would put in front of a homeowner starting a serious outdoor battery platform. POWERLOAD is not a gimmick: feeding line through the head and letting the motor wind it removes the worst little chore in string-trimmer ownership. The honest caveat is that it adds a mechanism. If a short line fragment or debris jams the head, you are troubleshooting a convenience feature rather than tapping a simple bump head.
Pick it over DeWalt when you want a dedicated outdoor ecosystem and do not need a 17-inch swath or attachment-capable shaft. Pick it over Milwaukee when you are not already deep in M18 batteries or Quik-Lok attachments. Pick it over Greenworks when POWERLOAD and EGO's broader mower/blower/edger platform are worth the price premium.
The runtime copy needs discipline. EGO's own kit rating is up to 30 minutes on the 2.5Ah battery, and heavy edging or thick weeds can burn through that faster. For a normal suburban weekly trim, that is fine. For fence lines, drainage ditches, and neglected weeds, budget a larger battery or a second pack. Skip it if you already own DeWalt, Milwaukee, Ryobi, or Greenworks batteries and do not want charger clutter. The best version of this purchase is EGO as the whole outdoor system, not EGO as one orphan tool.
Purchase Options
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