EcoFlow DELTA Pro 3
74BatteryRank score
$2,599as of 2026-07-11
Fair price← CompareCheck price on Amazon 
Check price on Amazon
EcoFlow DELTA Pro 3 vs EcoFlow DELTA Pro Ultra X
Decision readout
Better station
Too close to call overall — choose by how and where you use it.
Better buy today
No price tie-breaker today — choose based on fit and the sourced details.
EcoFlow DELTA Pro Ultra X
80BatteryRank score
$7,999as of 2026-07-04
Fair priceWhat changes the decision
- Home backup: EcoFlow DELTA Pro 3 — more usable capacity and AC output
- Camping & RV: EcoFlow DELTA Pro Ultra X — lighter and easier to carry
01 · Score evidence
Score breakdown
74
EcoFlow DELTA Pro 3
Overall
80
EcoFlow DELTA Pro Ultra X
83
POWER
EcoFlow DELTA Pro 3 +5
78
Usable capacity and how much you can run at once.
73
TRUST
EcoFlow DELTA Pro Ultra X +24
97
Owner reputation, safety record, warranty, and build durability.
N/A
CHARGING
Incomplete data
86
Wall and solar recharge speed.
49
LIVABILITY
EcoFlow DELTA Pro 3 +1
48
Lightweight, portable, and quiet enough to live with.
Computed from sourced data with a published, price-independent formula. Scores are relative to each model's size class.
02 · Usable energy
Capacity truth
The watt-hours on the box aren't what reaches your devices. Same scale, both units.
EcoFlow DELTA Pro 3
Rated (on the box)4,096 Wh
The marketing number — total cell capacity.
Usable (at the outlet)measured3,790 Wh
3790Wh usable at >93% efficiency (OutdoorGearLab) vs 4096 rated · 7% below the label
EcoFlow DELTA Pro Ultra X
Rated (on the box)12,288 Wh
The marketing number — total cell capacity.
Usable (at the outlet, est.)10,445 Wh
What reaches an AC outlet — about 15% is lost turning battery power into household AC. How we estimate.
03 · Sourced hardware
Key specs, side by side
| Spec | EcoFlow DELTA Pro 3 | EcoFlow DELTA Pro Ultra X |
|---|---|---|
| Usable capacity | 4,096 Wh | 12,288 Wh |
| Continuous power output | 4,000 W | 12,000 W |
| Surge power output | 8,000 W | — |
| Max solar input | 2,600 W | 10,000 W |
| Weight | 51.5 kg | 135.5 kg |
| Rated cycle life | 4,000 cycles | — |
Manufacturer-claimed unless marked verified (FCC/UL/DOE/lab). Hover any figure for its source. The better reading in each row is highlighted — lower wins for weight and recharge time.
04 · Tracked street price
Price & fair-price verdict
EcoFlow DELTA Pro 3
$2,599as of 2026-07-11Fair price
EcoFlow DELTA Pro Ultra X
$7,999as of 2026-07-04Fair price
Each verdict compares today's price against that model's own tracked history — never MSRP theater.
Where these rank
- EcoFlow DELTA Pro 3 #2 XL / home backup in Best Portable Power Stations · #2 of 10 in Best for RV & Van Life
- EcoFlow DELTA Pro Ultra X #1 XL / home backup in Best Portable Power Stations · #1 of 8 in Best for Home Backup