Anker 535 PowerHouse 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 $30 less. Whether that gap is worth closing depends on what you need to run.
- Growatt VITA 550 holds 5% more energy (538Wh vs 512Wh), so it runs the same load proportionally longer.
- Growatt VITA 550 has 450W more surge headroom (1200W vs 750W) — that decides whether a fridge, pump or AC compressor will actually start.
- Anker 535 PowerHouse is 0.9 lb lighter (16.7 lb vs 17.6 lb).
We'd skip the Anker 535 PowerHouse in this matchup. It costs $30 more than the Growatt VITA 550 while matching or trailing it on capacity, surge and cycle life — there's no spec here that justifies the premium.
A durable half-kWh unit for devices and light loads. Dependable, but the low output and slow charging make it a device-first companion.
Best for: Campers charging phones, laptops and lights, not appliances.
Where it falls short:
- 500W output is device-scale
- 120W solar input, slow recharge
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 535 PowerHouse | Growatt VITA 550 |
|---|---|---|
| Price | $429 | $399 |
| Capacity | 512 Wh | 538 Wh |
| Continuous output | 500 W | 600 W |
| Surge output | 750 W | 1200 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 3,000 |
| Weight (lighter wins) | 16.7 lb | 17.6 lb |
| Max solar | 120 W | 300 W |
| Recharge time (faster wins) | 2h 30m | 1h |
Runtime head-to-head
| Appliance | Anker 535 PowerHouse | Growatt VITA 550 |
|---|---|---|
| Refrigerator | ❌ | 7.6 hrs |
| Mini fridge | 13.8 hrs | 14.5 hrs |
| Chest freezer | ❌ | 5.7 hrs |
| CPAP machine | 10.9 hrs | 11.4 hrs |
| Sump pump | ❌ | ❌ |