Jackery Explorer 300 Plus vs EcoFlow DELTA 3 Ultra Plus
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
Jackery Explorer 300 Plus costs $1700 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Ultra Plus holds 967% more energy (3072Wh vs 288Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Ultra Plus has 6600W more surge headroom (7200W vs 600W) — that decides whether a fridge, pump or AC compressor will actually start.
- Jackery Explorer 300 Plus is 77.2 lb lighter (8.27 lb vs 85.5 lb).
- EcoFlow DELTA 3 Ultra Plus is rated for 4,000 cycles vs 3,000 — meaningful if you cycle it daily.
Jackery Explorer 300 Plus
A device charger, not a power station. At 8.27 lb and 288Wh it's for phones, laptops and a CPAP — nothing with a heating element or compressor.
Best for: CPAP users and travelers who need days of small-device power in a bag.
Where it falls short:
- 300W output rules out almost every appliance
- 288Wh is a single laptop-day of capacity
EcoFlow DELTA 3 Ultra Plus
The Ultra's solar problem solved: same everything, but 1600W of PV input instead of 800W. That doubles your off-grid refill speed for $200.
Best for: Off-grid cabins and van builds that actually recharge from panels.
Where it falls short:
- $1999 approaches DELTA Pro 3 pricing
- 85.5 lb
| Spec | Jackery Explorer 300 Plus | EcoFlow DELTA 3 Ultra Plus |
|---|---|---|
| Price | $299 | $1999 |
| Capacity | 288 Wh | 3072 Wh |
| Continuous output | 300 W | 3600 W |
| Surge output | 600 W | 7200 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 4,000 |
| Weight (lighter wins) | 8.27 lb | 85.5 lb |
| Max solar | 100 W | 1600 W |
| Recharge time (faster wins) | 2h | 1h 30m |
Runtime head-to-head
| Appliance | Jackery Explorer 300 Plus | EcoFlow DELTA 3 Ultra Plus |
|---|---|---|
| Refrigerator | ❌ | 43.5 hrs |
| Mini fridge | 7.8 hrs | 82.9 hrs |
| Chest freezer | ❌ | 32.6 hrs |
| CPAP machine | 6.1 hrs | 65.3 hrs |
| Sump pump | ❌ | 3.3 hrs |