Anker SOLIX F2600 vs Anker 521 PowerHouse
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 $1250 less. Whether that gap is worth closing depends on what you need to run.
- Anker SOLIX F2600 holds 900% more energy (2560Wh vs 256Wh), so it runs the same load proportionally longer.
- Anker SOLIX F2600 has 2500W more surge headroom (2800W vs 300W) — that decides whether a fridge, pump or AC compressor will actually start.
- Anker 521 PowerHouse is 53.5 lb lighter (8.2 lb vs 61.7 lb).
- Anker SOLIX F2600 is rated for 4,000 cycles vs 3,000 — meaningful if you cycle it daily.
Neither of these will start a sump pump or well pump — both surge below the ~3,400W those motors need. If home backup with pumps is your use case, look at higher-surge models instead of either of these.
An odd spec sheet: 2560Wh of capacity but only 2800W surge — the lowest surge-to-capacity ratio here. Capacity without starting power.
Best for: Long-duration backup of steady loads (lights, electronics, CPAP) rather than motor-driven appliances.
Where it falls short:
- 2800W surge is barely above its 2400W continuous — it will struggle with pumps
- 61.7 lb
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
| Spec | Anker SOLIX F2600 | Anker 521 PowerHouse |
|---|---|---|
| Price | $1499 | $249 |
| Capacity | 2560 Wh | 256 Wh |
| Continuous output | 2400 W | 200 W |
| Surge output | 2800 W | 300 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,000 |
| Weight (lighter wins) | 61.7 lb | 8.2 lb |
| Max solar | 1000 W | 100 W |
| Recharge time (faster wins) | 1h 30m | 2h 30m |
Runtime head-to-head
| Appliance | Anker SOLIX F2600 | Anker 521 PowerHouse |
|---|---|---|
| Refrigerator | 36.3 hrs | ❌ |
| Mini fridge | 69.1 hrs | ❌ |
| Chest freezer | 27.2 hrs | ❌ |
| CPAP machine | 54.4 hrs | 5.4 hrs |
| Sump pump | ❌ | ❌ |