Anker 521 PowerHouse
256 Wh · 200 W output · LiFePO4 · $249
✅ Specs verified against the manufacturer's official listing — source · Last checked
Our verdict
A pocket-scale LiFePO4 unit for keeping devices alive. 200W of output means it's a charger, not an appliance station.
Best for: Travelers and campers topping up phones, cameras and a laptop.
What we like
- 8.2 lb
- LiFePO4 at an entry price
Where it falls short
- 200W output runs devices only
- 256Wh is small
Full specifications
| Capacity | 256 Wh |
|---|---|
| Continuous output | 200 W |
| Surge output | 300 W |
| Battery chemistry | LiFePO4 |
| Rated cycles | 3,000 |
| Weight | 8.2 lb |
| Max solar input | 100 W |
| Recharge (AC) | 2h 30m |
| Expandable | No |
| Warranty | 5 years |
What can the Anker 521 PowerHouse run?
| Appliance | Can start it? | Est. runtime |
|---|---|---|
| Refrigerator | ❌ Surge too high | — |
| Mini fridge | ❌ Surge too high | — |
| Chest freezer | ❌ Surge too high | — |
| CPAP machine | ✅ Yes | 5.4 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 | 2.2 hrs |
| Laptop | ✅ Yes | 3.3 hrs |
| Phone charger | ✅ Yes | 10.9 hrs |
| CPAP + humidifier | ✅ Yes | 2.4 hrs |
| Fridge plus essentials | ❌ Surge too high | — |
| 12V RV fridge | ✅ Yes | 12.1 hrs |
| Starlink | ✅ Yes | 3.6 hrs |
| Electric blanket | ✅ Yes | 7.3 hrs |
Runtime = (capacity × 0.85 inverter efficiency) ÷ appliance watts. Refrigerator assumes a 40% compressor duty cycle. Real-world results vary.
Compare the Anker 521 PowerHouse
The models closest to it on capacity — what most people cross-shop.
- Anker 521 PowerHouse vs EcoFlow RIVER 2 — 256 Wh · 300 W · $199
- Anker 521 PowerHouse vs Jackery Explorer 240 v2 — 256 Wh · 300 W · $199
- Anker 521 PowerHouse vs EcoFlow RIVER 3 — 245 Wh · 300 W · $239
- Anker 521 PowerHouse vs Bluetti EB3A — 268 Wh · 600 W · $239
- Anker 521 PowerHouse vs Jackery Explorer 240 — 240 Wh · 200 W · $199
- Anker 521 PowerHouse vs EcoFlow RIVER 3 Plus — 286 Wh · 600 W · $329
Where the Anker 521 PowerHouse places
Every scenario it can actually handle, with its real position. We publish the placing whether or not it flatters the unit.
- Best Portable Power Stations for RV & Van Life — ranked #72 of 87
- Best Portable Power Stations for CPAP — ranked #82 of 87