Anker 757 PowerHouse vs Growatt VITA 550
Side-by-side on the specs that decide it — surge, capacity, runtime and price.
Both models' specs verified against manufacturer listings · Last updated
The short answer
Growatt VITA 550 costs $600 less. Whether that gap is worth closing depends on what you need to run.
- Anker 757 PowerHouse holds 128% more energy (1229Wh vs 538Wh), so it runs the same load proportionally longer.
- Anker 757 PowerHouse has 1200W more surge headroom (2400W vs 1200W) — that decides whether a fridge, pump or AC compressor will actually start.
- Growatt VITA 550 is 26.3 lb lighter (17.6 lb vs 43.9 lb).
Neither of these will start a sump pump or well pump — both surge below the ~3,400W those motors need. If home backup with pumps is your use case, look at higher-surge models instead of either of these.
Anker's older flagship, now a discount play. Solid and durable, but heavy for its capacity and outclassed on charge speed by the newer C-series.
Best for: Buyers who find it discounted below the newer Anker C1000.
Where it falls short:
- 43.9 lb for 1.2kWh is heavy
- 300W solar input is low
- Outclassed by the newer C1000
A tidy half-kWh unit with fast charging and a 1,200W surge that lets it start small appliances a 600W rating wouldn't suggest.
Best for: Campers who want fast charging and a bit of surge headroom at half a kWh.
Where it falls short:
- 538Wh is weekend-scale
- 3-year warranty
| Spec | Anker 757 PowerHouse | Growatt VITA 550 |
|---|---|---|
| Price | $999 | $399 |
| Capacity | 1229 Wh | 538 Wh |
| Continuous output | 1500 W | 600 W |
| Surge output | 2400 W | 1200 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 3,000 |
| Weight (lighter wins) | 43.9 lb | 17.6 lb |
| Max solar | 300 W | 300 W |
| Recharge time (faster wins) | 1h 30m | 1h |
Runtime head-to-head
| Appliance | Anker 757 PowerHouse | Growatt VITA 550 |
|---|---|---|
| Refrigerator | 17.4 hrs | 7.6 hrs |
| Mini fridge | 33.2 hrs | 14.5 hrs |
| Chest freezer | 13.1 hrs | 5.7 hrs |
| CPAP machine | 26.1 hrs | 11.4 hrs |
| Sump pump | ❌ | ❌ |