Anker SOLIX C800 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 $200 less. Whether that gap is worth closing depends on what you need to run.
- Anker SOLIX C800 holds 43% more energy (768Wh vs 538Wh), so it runs the same load proportionally longer.
- Anker SOLIX C800 has 400W more surge headroom (1600W vs 1200W) — that decides whether a fridge, pump or AC compressor will actually start.
- Growatt VITA 550 is 7.3 lb lighter (17.6 lb vs 24.9 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.
The C1000's smaller sibling. Same fast-charging DNA at a lower price, but the 768Wh capacity puts it firmly in weekend-trip territory.
Best for: Campers and van-lifers powering electronics, lights and a mini fridge — not home backup.
Where it falls short:
- 300W solar input is low — slow to top off off-grid
- 1600W surge rules out most motor-driven appliances
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 C800 | Growatt VITA 550 |
|---|---|---|
| Price | $599 | $399 |
| Capacity | 768 Wh | 538 Wh |
| Continuous output | 1200 W | 600 W |
| Surge output | 1600 W | 1200 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 3,000 |
| Weight (lighter wins) | 24.9 lb | 17.6 lb |
| Max solar | 300 W | 300 W |
| Recharge time (faster wins) | 58 min | 1h |
Runtime head-to-head
| Appliance | Anker SOLIX C800 | Growatt VITA 550 |
|---|---|---|
| Refrigerator | 10.9 hrs | 7.6 hrs |
| Mini fridge | 20.7 hrs | 14.5 hrs |
| Chest freezer | 8.2 hrs | 5.7 hrs |
| CPAP machine | 16.3 hrs | 11.4 hrs |
| Sump pump | ❌ | ❌ |