Compare Mowers
List prices are the manufacturer’s published figures, re-checked daily; they exclude tax, freight and dealer setup.
A side-by-side reference of each model's stated specifications. MowerFacts doesn’t give opinions: where a published, spec-derived rule can separate machines we mark a Data Pick and show the rule; here, read the values and decide what fits your needs.
Best suited for
What each model is built for, from its duty class and key specs. This is a neutral reference — MowerFacts does not rank one model above another.
- Husqvarna Automower 450X NERA — residential: typical home lawns; 9-inch deck; battery (no fuel or engine maintenance)
- Husqvarna Automower 550 — residential: typical home lawns; 9-inch deck; battery (no fuel or engine maintenance)
What’s different? The 5 differences that matter most, from the published figures.
- Automower 450X NERA runs 145 min per charge; Automower 550 runs 270 min per charge, a 125 min difference. Stated run time is under the maker's conditions. Thick or wet grass shortens it.
- Automower 450X NERA ships with a 7.5 Ah battery; Automower 550 ships with a 10 Ah battery, a 2.5 Ah difference. Amp-hours is stored energy at the pack's voltage. Run time also depends on load, so a bigger pack lasts longer under the same conditions, not a fixed time.
- Automower 450X NERA charges in 40 min; Automower 550 charges in 60 min, a 20 min difference. Charge time is with the supplied charger; another charger changes it.
- Automower 450X NERA weighs 33 lbs (15 kg); Automower 550 weighs 30 lbs (13.5 kg), a 3 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What Automower 450X NERA's weight means for a trailer ›
- Automower 450X NERA is rated for slopes to 50%; Automower 550 is rated for slopes to 45%, a 5 points difference. The slope rating is the maker's limit for safe operation, not a measure of performance.
1 more difference
Other verified differences
- Automower 450X NERA is rated at 58 dB; Automower 550 is rated at 67 dB, a 9 dB difference.
Verified means each manufacturer publishes the figure. A bigger number is only a bigger number; nothing here says which machine is better. The full specification table is below.
Which is faster on your property? › Measure your lawn once and MowerFacts times all 2 against it.
| Spec | Automower 450X NERA Husqvarna · Robotic |
Automower 550 Husqvarna · Robotic |
|---|---|---|
| List price | dealer quote | dealer quote |
| Engine | ||
| Power Source | battery | battery |
| Electrical | ||
| Battery Capacity | 7.5 Ah | 10 Ah |
| Deck | ||
| Cutting Width | 9.4 in (240 mm) | 9.4 in (240 mm) |
| Dimensions | ||
| Weight | 33 lbs (15 kg) | 30 lbs (13.5 kg) |
| Width | 21.3 in (540 mm) | 22 in (560 mm) |
| Length | 29.5 in (750 mm) | 28.3 in (720 mm) |
| Height | 11 in (280 mm) | 12.2 in (310 mm) |
| Robotic | ||
| Work Area | 5000 ft2 | 5000 ft2 |
| Max Slope | 50 pct | 45 pct |
| Boundary | Physical wire | Physical wire |
| Run Time | 145 min | 270 min |
| Charge Time | 40 min | 60 min |
| Noise Level | 58 db | 67 db |
| Theft Protection | Yes | Yes |
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.