Anker SOLIX C1000 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 SOLIX C1000 holds 96% more energy (1056Wh vs 538Wh), so it runs the same load proportionally longer.
- Anker SOLIX C1000 has 1200W more surge headroom (2400W vs 1200W) — that decides whether a fridge, pump or AC compressor will actually start.
- Growatt VITA 550 is 10.8 lb lighter (17.6 lb vs 28.44 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.
The default recommendation for most people. It clears the 1kWh bar, recharges in under an hour, and undercuts almost everything with comparable specs.
Best for: First-time buyers who want one unit for camping and short outages without overpaying.
Where it falls short:
- 2400W surge won't start a sump pump or well pump
- Only 1056Wh — a fridge-plus-devices outage tops out around a day
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 SOLIX C1000 | Growatt VITA 550 |
|---|---|---|
| Price | $999 | $399 |
| Capacity | 1056 Wh | 538 Wh |
| Continuous output | 1800 W | 600 W |
| Surge output | 2400 W | 1200 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 3,000 |
| Weight (lighter wins) | 28.44 lb | 17.6 lb |
| Max solar | 600 W | 300 W |
| Recharge time (faster wins) | 58 min | 1h |
Runtime head-to-head
| Appliance | Anker SOLIX C1000 | Growatt VITA 550 |
|---|---|---|
| Refrigerator | 15.0 hrs | 7.6 hrs |
| Mini fridge | 28.5 hrs | 14.5 hrs |
| Chest freezer | 11.2 hrs | 5.7 hrs |
| CPAP machine | 22.4 hrs | 11.4 hrs |
| Sump pump | ❌ | ❌ |