Anker SOLIX F2600 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 $1100 less. Whether that gap is worth closing depends on what you need to run.
- Anker SOLIX F2600 holds 376% more energy (2560Wh vs 538Wh), so it runs the same load proportionally longer.
- Anker SOLIX F2600 has 1600W more surge headroom (2800W vs 1200W) — that decides whether a fridge, pump or AC compressor will actually start.
- Growatt VITA 550 is 44.1 lb lighter (17.6 lb vs 61.7 lb).
- Anker SOLIX F2600 is rated for 4,000 cycles vs 3,000 — meaningful if you cycle it daily.
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.
An odd spec sheet: 2560Wh of capacity but only 2800W surge — the lowest surge-to-capacity ratio here. Capacity without starting power.
Best for: Long-duration backup of steady loads (lights, electronics, CPAP) rather than motor-driven appliances.
Where it falls short:
- 2800W surge is barely above its 2400W continuous — it will struggle with pumps
- 61.7 lb
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 F2600 | Growatt VITA 550 |
|---|---|---|
| Price | $1499 | $399 |
| Capacity | 2560 Wh | 538 Wh |
| Continuous output | 2400 W | 600 W |
| Surge output | 2800 W | 1200 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,000 |
| Weight (lighter wins) | 61.7 lb | 17.6 lb |
| Max solar | 1000 W | 300 W |
| Recharge time (faster wins) | 1h 30m | 1h |
Runtime head-to-head
| Appliance | Anker SOLIX F2600 | Growatt VITA 550 |
|---|---|---|
| Refrigerator | 36.3 hrs | 7.6 hrs |
| Mini fridge | 69.1 hrs | 14.5 hrs |
| Chest freezer | 27.2 hrs | 5.7 hrs |
| CPAP machine | 54.4 hrs | 11.4 hrs |
| Sump pump | ❌ | ❌ |