Goal Zero Yeti 500 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 $450 less. Whether that gap is worth closing depends on what you need to run.
- Goal Zero Yeti 500 holds 95% more energy (499Wh vs 256Wh), so it runs the same load proportionally longer.
- Goal Zero Yeti 500 has 700W more surge headroom (1000W vs 300W) — that decides whether a fridge, pump or AC compressor will actually start.
- Anker 521 PowerHouse is 4.7 lb lighter (8.2 lb vs 12.9 lb).
- Goal Zero Yeti 500 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.
A rugged, water-resistant unit for people who'll actually beat it up. You pay a premium over similar-capacity rivals for that durability.
Best for: Overlanders and job sites where the unit will get wet, dusty and knocked around.
Where it falls short:
- $699 for 499Wh is expensive per watt-hour
- Only a 2-year warranty vs 5 years from most rivals
- 120W solar input is very low
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 | Goal Zero Yeti 500 | Anker 521 PowerHouse |
|---|---|---|
| Price | $699 | $249 |
| Capacity | 499 Wh | 256 Wh |
| Continuous output | 500 W | 200 W |
| Surge output | 1000 W | 300 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,000 |
| Weight (lighter wins) | 12.9 lb | 8.2 lb |
| Max solar | 120 W | 100 W |
| Recharge time (faster wins) | 1h 25m | 2h 30m |
Runtime head-to-head
| Appliance | Goal Zero Yeti 500 | Anker 521 PowerHouse |
|---|---|---|
| Refrigerator | 7.1 hrs | ❌ |
| Mini fridge | 13.5 hrs | ❌ |
| Chest freezer | 5.3 hrs | ❌ |
| CPAP machine | 10.6 hrs | 5.4 hrs |
| Sump pump | ❌ | ❌ |