Oukitel P2001 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 $500 less. Whether that gap is worth closing depends on what you need to run.
- Oukitel P2001 holds 272% more energy (2000Wh vs 538Wh), so it runs the same load proportionally longer.
- Oukitel P2001 has 2800W more surge headroom (4000W vs 1200W) — that decides whether a fridge, pump or AC compressor will actually start.
- Growatt VITA 550 is 31.4 lb lighter (17.6 lb vs 49 lb).
- Oukitel P2001 is rated for 3,500 cycles vs 3,000 — meaningful if you cycle it daily.
Oukitel P2001
An older Oukitel 2kWh, still sold cheap. Solid on paper with 2,000W and expandability, but the 500W solar input is a real limit off-grid.
Best for: Budget buyers who recharge mainly from the wall, not panels.
Where it falls short:
- 500W solar input is low for 2kWh
- Smaller support network
Growatt VITA 550
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 | Oukitel P2001 | Growatt VITA 550 |
|---|---|---|
| Price | $899 | $399 |
| Capacity | 2000 Wh | 538 Wh |
| Continuous output | 2000 W | 600 W |
| Surge output | 4000 W | 1200 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,500 | 3,000 |
| Weight (lighter wins) | 49 lb | 17.6 lb |
| Max solar | 500 W | 300 W |
| Recharge time (faster wins) | 1h 30m | 1h |
Runtime head-to-head
| Appliance | Oukitel P2001 | Growatt VITA 550 |
|---|---|---|
| Refrigerator | 28.3 hrs | 7.6 hrs |
| Mini fridge | 54.0 hrs | 14.5 hrs |
| Chest freezer | 21.3 hrs | 5.7 hrs |
| CPAP machine | 42.5 hrs | 11.4 hrs |
| Sump pump | 2.1 hrs | ❌ |