Verdict
Head-to-head · Best Electric Lawn Mowers Under $500

Greenworks MO48L4422 21" Self-Propelled vs Sun Joe MJ403E Corded

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

Greenworks MO48L4422 21" Self-Propelled comes out ahead by a narrow margin (4.7 vs 4.5). The gap is mostly about larger suburban lawns (1/4 to 1/2 acre) — read the strengths below before deciding.

Greenworks MO48L4422 21" Self-Propelled
Higher ratedRanked #1 in Best Electric Lawn Mowers Under $500
Greenworks MO48L4422 21" Self-Propelled
$499

The MO48L4422 is the best-overall pick — Greenworks' self-propelled cordless for lawns up to half acre.

Strengths
  • Self-propelled — best for sloped or larger lawns
  • 70-min runtime on 4× 24V 4Ah batteries
  • Up to 1/2 acre coverage
Watch-outs
  • At $499 just under the budget ceiling
  • 4-battery system to manage
  • Heavier than push-only mowers
Sun Joe MJ403E Corded
Ranked #5 in Best Electric Lawn Mowers Under $500
Sun Joe MJ403E Corded
$150

The MJ403E is the corded value pick — Sun Joe's 17" corded mower at $150. Best for small yards near outlets.

Strengths
  • Cheapest electric mower under $500
  • 17" deck with 13-amp motor
  • No battery to manage
Watch-outs
  • Corded — cord management for whole-yard mowing
  • Smaller 17" deck
  • Less power for tall grass

How they stack up

Greenworks MO48L4422 21" Self-Propelled

Only self-propelled pick. Largest coverage. 4-battery system.

Sun Joe MJ403E Corded

Cheapest. Corded. Smaller deck.

Specs side-by-side

SpecGreenworks MO48L4422 21" Self-PropelledSun Joe MJ403E Corded
Width21"17"
DriveSelf-propelledPush
Battery4× 24V 4Ah
Runtime70 min
PowerCorded 13-amp
MulchingYes
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