Goal Zero Yeti 1500X 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 $1750 less. Whether that gap is worth closing depends on what you need to run.
- Goal Zero Yeti 1500X holds 492% more energy (1516Wh vs 256Wh), so it runs the same load proportionally longer.
- Goal Zero Yeti 1500X has 3200W more surge headroom (3500W vs 300W) — that decides whether a fridge, pump or AC compressor will actually start.
- Anker 521 PowerHouse is 37.4 lb lighter (8.2 lb vs 45.64 lb).
- Anker 521 PowerHouse uses LiFePO4 while the other uses NMC — roughly double the usable cycle life.
- Anker 521 PowerHouse is rated for 3,000 cycles vs 500 — meaningful if you cycle it daily.
If you plan to cycle the battery daily, think twice about the Goal Zero Yeti 1500X. Its NMC cells are rated for 500 cycles against the LiFePO4 rival's longer life — over years of regular use that's the more expensive unit, whatever the sticker says.
The previous-generation flagship. Its NMC battery is the catch — far fewer cycles than the LiFePO4 units now around it, including its own replacement.
Best for: Only at a steep discount against the newer LiFePO4 Yeti 1500.
Where it falls short:
- NMC chemistry — roughly 500 cycles vs 4,000 for the new 1500
- 180-minute recharge is slow
- Only a 2-year warranty
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 1500X | Anker 521 PowerHouse |
|---|---|---|
| Price | $1999 | $249 |
| Capacity | 1516 Wh | 256 Wh |
| Continuous output | 2000 W | 200 W |
| Surge output | 3500 W | 300 W |
| Battery | NMC | LiFePO4 |
| Rated cycles | 500 | 3,000 |
| Weight (lighter wins) | 45.64 lb | 8.2 lb |
| Max solar | 600 W | 100 W |
| Recharge time (faster wins) | 3h | 2h 30m |
Runtime head-to-head
| Appliance | Goal Zero Yeti 1500X | Anker 521 PowerHouse |
|---|---|---|
| Refrigerator | 21.5 hrs | ❌ |
| Mini fridge | 40.9 hrs | ❌ |
| Chest freezer | 16.1 hrs | ❌ |
| CPAP machine | 32.2 hrs | 5.4 hrs |
| Sump pump | 1.6 hrs | ❌ |