Allpowers R4000 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 $2050 less. Whether that gap is worth closing depends on what you need to run.
- Allpowers R4000 holds 1250% more energy (3456Wh vs 256Wh), so it runs the same load proportionally longer.
- Allpowers R4000 has 5700W more surge headroom (6000W vs 300W) — that decides whether a fridge, pump or AC compressor will actually start.
- Anker 521 PowerHouse is 97.8 lb lighter (8.2 lb vs 106 lb).
- Allpowers R4000 is rated for 3,500 cycles vs 3,000 — meaningful if you cycle it daily.
Allpowers R4000
A large expandable unit that undercuts the EcoFlow Delta Pro 3 on price while matching its 4,000W output — the trade is a less established support network.
Best for: Whole-home backup buyers prioritising price per watt over brand.
Where it falls short:
- 106 lb
- Brand support and resale trail the big names
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
| Spec | Allpowers R4000 | Anker 521 PowerHouse |
|---|---|---|
| Price | $2299 | $249 |
| Capacity | 3456 Wh | 256 Wh |
| Continuous output | 4000 W | 200 W |
| Surge output | 6000 W | 300 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,500 | 3,000 |
| Weight (lighter wins) | 106 lb | 8.2 lb |
| Max solar | 2000 W | 100 W |
| Recharge time (faster wins) | 1h 30m | 2h 30m |
Runtime head-to-head
| Appliance | Allpowers R4000 | Anker 521 PowerHouse |
|---|---|---|
| Refrigerator | 49.0 hrs | ❌ |
| Mini fridge | 93.3 hrs | ❌ |
| Chest freezer | 36.7 hrs | ❌ |
| CPAP machine | 73.4 hrs | 5.4 hrs |
| Sump pump | 3.7 hrs | ❌ |