EcoFlow DELTA Pro 3
76BatteryRank score · Excellent
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EcoFlow DELTA Pro 3 vs EcoFlow DELTA Pro Ultra
Decision readout
Better station
EcoFlow DELTA Pro 3 leads by 19 points overall.
EcoFlow DELTA Pro Ultra
57BatteryRank score · Balanced
What changes the decision
- Home backup: EcoFlow DELTA Pro 3 — stronger combined capacity and AC-output score
- Camping & RV: EcoFlow DELTA Pro Ultra — lighter and easier to carry
01 · Score evidence
Score breakdown
76
EcoFlow DELTA Pro 3
Overall
57
EcoFlow DELTA Pro Ultra
87
POWER
EcoFlow DELTA Pro 3 +32
55
Battery-side usable capacity and how much you can run at once.
74
TRUST
EcoFlow DELTA Pro 3 +10
64
Owner reputation, safety record, warranty, and build durability.
N/A
CHARGING
Incomplete data
N/A
Wall and solar recharge speed.
29
LIVABILITY
EcoFlow DELTA Pro Ultra +15
44
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. Show source
claimed sourceus.ecoflow.com ↗2026-07-04The marketing number — total cell capacity.
AC deliveredmeasured
3,790 Wh. Show source
verified source3790Wh usable at >93% efficiency (OutdoorGearLab) vs 4096 rated2026-07-043790Wh usable at >93% efficiency (OutdoorGearLab) vs 4096 rated · 7% below the label
EcoFlow DELTA Pro Ultra
Rated (on the box)
6,144 Wh. Show source
claimed sourceus.ecoflow.com ↗2026-07-04The marketing number — total cell capacity.
AC delivered (est.)
5,222 Wh. Show source
estimated sourceestimate = battery-side usable capacity × 85% inverter efficiencyWhat reaches an AC outlet — about 15% is lost turning battery power into household AC. How we estimate.
03 · Same assumptions
Same-device runtime
| Device | EcoFlow DELTA Pro 3 | EcoFlow DELTA Pro Ultra | Assumption |
|---|---|---|---|
| CPAP (humidifier off) | about 52.6 nights | about 72.5 nights | 9 W · |
| CPAP (heated humidifier on) | about 8.5 nights | about 11.7 nights | 56 W · |
| Refrigerator (full-size) | about 60 hours | about 83 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 211 hours | about 290 hours | 18 W · |
| Laptop (65W charger) | about 117 hours | about 161 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 189 full charges | about 261 full charges | 20 W · |
One device at a time; estimates use each station's usable AC energy. Build your own load →
04 · Sourced hardware
Key specs, side by side
| Spec | EcoFlow DELTA Pro 3 | EcoFlow DELTA Pro Ultra |
|---|---|---|
| AC-delivered capacity | 3,790 Whverified. Show sourceverified source3790Wh usable at >93% efficiency (OutdoorGearLab) vs 4096 rated2026-07-04 | 5,222 Whest.. Show sourceestimated sourceus.ecoflow.com ↗2026-07-04 |
| Continuous power output | 4,000 W. Show sourceclaimed sourceus.ecoflow.com ↗ | 7,200 W. Show sourceclaimed sourceus.ecoflow.com ↗ |
| Surge power output | 8,000 W. Show sourceclaimed sourceus.ecoflow.com ↗ | 10,800 W. Show sourceclaimed sourceus.ecoflow.com ↗ |
| Max solar input | 2,600 W. Show sourceclaimed sourceus.ecoflow.com ↗ | 5,600 W. Show sourceclaimed sourceus.ecoflow.com ↗ |
| Weight | 51.5 kg. Show sourceclaimed sourceus.ecoflow.com ↗ | 82.4 kg. Show sourceclaimed sourceus.ecoflow.com ↗ |
| Rated cycle life | 4,000 cycles. Show sourceclaimed sourceus.ecoflow.com ↗ | 3,500 cycles. Show sourceclaimed sourceus.ecoflow.com ↗ |
Manufacturer figures unless marked verified or est. Tap or focus a figure to view its source. The better reading in each row is highlighted — lower wins for weight and recharge time.
Where these rank
- EcoFlow DELTA Pro 3 #1 of 10 in Best for RV & Van Life · #2 XL / home backup in Best Portable Power Stations
- EcoFlow DELTA Pro Ultra #2 of 10 in Best UPS-Capable Power Stations · #3 of 8 in Best for Home Backup
Quick answers
- Is the EcoFlow DELTA Pro 3 better than the EcoFlow DELTA Pro Ultra?
- EcoFlow DELTA Pro 3 leads by 19 points overall.
- Which has more usable capacity, the EcoFlow DELTA Pro 3 or EcoFlow DELTA Pro Ultra?
- The EcoFlow DELTA Pro Ultra, by 1,432 Wh — 3,790 Wh versus 5,222 Wh, a 38% advantage. At a 60 W load that is roughly 23.9 extra hours before the battery is empty. Both figures are estimated AC-delivered energy, not the nameplate battery rating — the watt-hours that actually reach your devices, which is always less than the number on the box.
- Which has more AC output, the EcoFlow DELTA Pro 3 or EcoFlow DELTA Pro Ultra?
- The EcoFlow DELTA Pro Ultra: 4,000 W versus 7,200 W continuous. That gap matters only if a load sits between the two numbers — below 4,000 W both run it, above 7,200 W neither does. Surge headroom follows the same order: 8,000 W against 10,800 W, and surge is what decides whether a compressor or pump actually starts.
- How does runtime compare between the EcoFlow DELTA Pro 3 and EcoFlow DELTA Pro Ultra?
- On the same sourced load — a refrigerator (full-size) — the EcoFlow DELTA Pro Ultra runs longer: 82.9 hours against 60.2. These are planning estimates from each model's AC-delivered capacity, not stopwatch tests; real duty cycle and temperature move them.
- Which is lighter, the EcoFlow DELTA Pro 3 or EcoFlow DELTA Pro Ultra?
- The EcoFlow DELTA Pro 3, by 30.9 kg (51.5 kg versus 82.4 kg). Both weights are manufacturer figures for the bare unit; cables and a solar panel add to whatever you actually carry.
- Which model should I buy for my use case?
- On the sub-scores that describe each use case: the EcoFlow DELTA Pro 3 for home backup; the EcoFlow DELTA Pro Ultra for camping & rv. They split, so the honest answer depends on which of those you are actually buying for.
- Are the EcoFlow DELTA Pro 3 and EcoFlow DELTA Pro Ultra from the same lineup?
- Yes — same manufacturer, so warranty terms, app, accessory ecosystem, and expansion batteries are usually shared. That narrows the decision to the hardware differences above rather than to which company you want to buy into.
Keep deciding
- Full scorecard, specs & price for EcoFlow DELTA Pro 3 →
- Full scorecard, specs & price for EcoFlow DELTA Pro Ultra →
- See more alternatives to EcoFlow DELTA Pro 3 →
- See more alternatives to EcoFlow DELTA Pro Ultra →
- What size do you need? →
- Browse all rankings →
- Check device runtime evidence →
- Compare outage and trip load plans →
- Browse complete power kits →
- Capacity vs output explained →
- Battery cycle-life thresholds →
- UPS behavior explained →