EcoFlow DELTA 3 Ultra vs Goal Zero Yeti 1500X
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
EcoFlow DELTA 3 Ultra costs $200 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Ultra holds 103% more energy (3072Wh vs 1516Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Ultra has 3700W more surge headroom (7200W vs 3500W) — that decides whether a fridge, pump or AC compressor will actually start.
- Goal Zero Yeti 1500X is 38.2 lb lighter (45.64 lb vs 83.8 lb).
- EcoFlow DELTA 3 Ultra uses LiFePO4 while the other uses NMC — roughly double the usable cycle life.
- EcoFlow DELTA 3 Ultra is rated for 4,000 cycles vs 500 — meaningful if you cycle it daily.
We'd skip the Goal Zero Yeti 1500X in this matchup. It costs $200 more than the EcoFlow DELTA 3 Ultra while matching or trailing it on capacity, surge and cycle life — there's no spec here that justifies the premium.
3kWh with 7200W surge at $1799 — this is whole-home territory at a mid-range price. The catch is the 800W solar input.
Best for: Grid-tied home backup where you recharge from the wall, not the sun.
Where it falls short:
- 800W solar input is low for 3kWh — slow off-grid refills
- 83.8 lb
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
| Spec | EcoFlow DELTA 3 Ultra | Goal Zero Yeti 1500X |
|---|---|---|
| Price | $1799 | $1999 |
| Capacity | 3072 Wh | 1516 Wh |
| Continuous output | 3600 W | 2000 W |
| Surge output | 7200 W | 3500 W |
| Battery | LiFePO4 | NMC |
| Rated cycles | 4,000 | 500 |
| Weight (lighter wins) | 83.8 lb | 45.64 lb |
| Max solar | 800 W | 600 W |
| Recharge time (faster wins) | 1h 30m | 3h |
Runtime head-to-head
| Appliance | EcoFlow DELTA 3 Ultra | Goal Zero Yeti 1500X |
|---|---|---|
| Refrigerator | 43.5 hrs | 21.5 hrs |
| Mini fridge | 82.9 hrs | 40.9 hrs |
| Chest freezer | 32.6 hrs | 16.1 hrs |
| CPAP machine | 65.3 hrs | 32.2 hrs |
| Sump pump | 3.3 hrs | 1.6 hrs |