Growatt VITA 550
538 Wh · 600 W output · LiFePO4 · $399
✅ Specs verified against the manufacturer's official listing — source · Last checked
Our verdict
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.
What we like
- 1,200W surge for the size
- 60-minute recharge
- LiFePO4
Where it falls short
- 538Wh is weekend-scale
- 3-year warranty
Full specifications
| Capacity | 538 Wh |
|---|---|
| Continuous output | 600 W |
| Surge output | 1200 W |
| Battery chemistry | LiFePO4 |
| Rated cycles | 3,000 |
| Weight | 17.6 lb |
| Max solar input | 300 W |
| Recharge (AC) | 1h |
| Expandable | No |
| Warranty | 3 years |
What can the Growatt VITA 550 run?
| Appliance | Can start it? | Est. runtime |
|---|---|---|
| Refrigerator | ✅ Yes | 7.6 hrs |
| Mini fridge | ✅ Yes | 14.5 hrs |
| Chest freezer | ✅ Yes | 5.7 hrs |
| CPAP machine | ✅ Yes | 11.4 hrs |
| Sump pump | ❌ Surge too high | — |
| Well pump (1/2 HP) | ❌ Surge too high | — |
| Space heater | ❌ Surge too high | — |
| Window AC (8k BTU) | ❌ Surge too high | — |
| Microwave | ❌ Surge too high | — |
| Coffee maker | ❌ Surge too high | — |
| TV (55" LED) | ✅ Yes | 4.6 hrs |
| Laptop | ✅ Yes | 7.0 hrs |
| Phone charger | ✅ Yes | 22.9 hrs |
| CPAP + humidifier | ✅ Yes | 5.1 hrs |
| Fridge plus essentials | ✅ Yes | 4.6 hrs |
| 12V RV fridge | ✅ Yes | 25.4 hrs |
| Starlink | ✅ Yes | 7.6 hrs |
| Electric blanket | ✅ Yes | 15.2 hrs |
Runtime = (capacity × 0.85 inverter efficiency) ÷ appliance watts. Refrigerator assumes a 40% compressor duty cycle. Real-world results vary.