Anker 521 PowerHouse vs Mango Power E
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
Anker 521 PowerHouse costs $2750 less. Whether that gap is worth closing depends on what you need to run.
- Mango Power E holds 1280% more energy (3533Wh vs 256Wh), so it runs the same load proportionally longer.
- Mango Power E has 5700W more surge headroom (6000W vs 300W) — that decides whether a fridge, pump or AC compressor will actually start.
- Anker 521 PowerHouse is 64.9 lb lighter (8.2 lb vs 73.1 lb).
Anker 521 PowerHouse
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.
Where it falls short:
- 200W output runs devices only
- 256Wh is small
Mango Power E
A polished 3.5kWh home unit with a standout 10-year warranty. The catch is a relatively low 660W solar input for the capacity.
Best for: Home-backup buyers who want a long warranty and lots of capacity.
Where it falls short:
- 660W solar input is low for 3.5kWh
- 73.1 lb
| Spec | Anker 521 PowerHouse | Mango Power E |
|---|---|---|
| Price | $249 | $2999 |
| Capacity | 256 Wh | 3533 Wh |
| Continuous output | 200 W | 3000 W |
| Surge output | 300 W | 6000 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 3,000 |
| Weight (lighter wins) | 8.2 lb | 73.1 lb |
| Max solar | 100 W | 660 W |
| Recharge time (faster wins) | 2h 30m | 1h 30m |
Runtime head-to-head
| Appliance | Anker 521 PowerHouse | Mango Power E |
|---|---|---|
| Refrigerator | ❌ | 50.1 hrs |
| Mini fridge | ❌ | 95.3 hrs |
| Chest freezer | ❌ | 37.5 hrs |
| CPAP machine | 5.4 hrs | 75.1 hrs |
| Sump pump | ❌ | 3.8 hrs |