EcoFlow DELTA 2
57BatteryRank score · Balanced
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EcoFlow DELTA 2 vs EcoFlow DELTA 3
Decision readout
Better station
EcoFlow DELTA 3 leads by 11 points overall.
EcoFlow DELTA 3
68BatteryRank score · Balanced
What changes the decision
- Home backup: EcoFlow DELTA 3 — stronger combined capacity and AC-output score
- CPAP & bedroom: EcoFlow DELTA 2 — quieter under load
- Camping & RV: EcoFlow DELTA 2 — lighter and easier to carry
01 · Score evidence
Score breakdown
57
EcoFlow DELTA 2
Overall
68
EcoFlow DELTA 3
53
POWER
EcoFlow DELTA 3 +12
65
Battery-side usable capacity and how much you can run at once.
67
TRUST
EcoFlow DELTA 3 +19
86
Owner reputation, safety record, warranty, and build durability.
31
CHARGING
EcoFlow DELTA 3 +35
66
Wall and solar recharge speed.
76
LIVABILITY
EcoFlow DELTA 2 +16
60
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 2
Rated (on the box)
1,024 Wh. Show source
claimed sourceus.ecoflow.com ↗2026-07-10The marketing number — total cell capacity.
AC deliveredmeasured
890–900 Wh. Show source
verified source~890-900Wh usable AC (~86-90% conversion) vs 1024Wh rated (Portable Power Lab, 6-month test)2026-07-04~890-900Wh usable AC (~86-90% conversion) vs 1024Wh rated (Portable Power Lab, 6-month test) · 13% below the label
EcoFlow DELTA 3
Rated (on the box)
1,024 Wh. Show source
claimed sourceus.ecoflow.com ↗2026-07-04The marketing number — total cell capacity.
AC delivered (est.)
870 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 2 | EcoFlow DELTA 3 | Assumption |
|---|---|---|---|
| CPAP (humidifier off) | about 12.4 nights | about 12.1 nights | 9 W · |
| CPAP (heated humidifier on) | about 2.0 nights | about 1.9 nights | 56 W · |
| Refrigerator (full-size) | about 14 hours | about 14 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 50 hours | about 48 hours | 18 W · |
| Laptop (65W charger) | about 28 hours | about 27 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 44 full charges | about 43 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 2 | EcoFlow DELTA 3 |
|---|---|---|
| AC-delivered capacity | 895 Whverified. Show sourceverified source~890-900Wh usable AC (~86-90% conversion) vs 1024Wh rated (Portable Power Lab, 6-month test)2026-07-04 | 870 Whest.. Show sourceestimated sourceus.ecoflow.com ↗2026-07-04 |
| Continuous power output | 1,800 W. Show sourceclaimed sourceus.ecoflow.com ↗ | 1,800 W. Show sourceclaimed sourceus.ecoflow.com ↗ |
| Surge power output | 2,700 W. Show sourceclaimed sourceus.ecoflow.com ↗ | 3,600 W. Show sourceclaimed sourceus.ecoflow.com ↗ |
| Max solar input | 500 W. Show sourceclaimed sourceus.ecoflow.com ↗ | 500 W. Show sourceclaimed sourceus.ecoflow.com ↗ |
| AC charge time (0–100%) | 72 min. Show sourceclaimed sourceus.ecoflow.com ↗ | 56 min. Show sourceclaimed sourceus.ecoflow.com ↗ |
| Weight | 12 kg. Show sourceclaimed sourceus.ecoflow.com ↗ | 12.5 kg. Show sourceclaimed sourceus.ecoflow.com ↗ |
| Rated cycle life | 3,000 cycles. Show sourceclaimed sourceus.ecoflow.com ↗ | 4,000 cycles. Show sourceclaimed sourceus.ecoflow.com ↗ |
Only show differences
- AC-delivered capacity895 Wh870 Wh
- Surge power output2,700 W3,600 W
- AC charge time (0–100%)72 min56 min
- Weight12 kg12.5 kg
- Rated cycle life3,000 cycles4,000 cycles
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
Quick answers
- Is the EcoFlow DELTA 2 better than the EcoFlow DELTA 3?
- EcoFlow DELTA 3 leads by 11 points overall.
- Which has more usable capacity, the EcoFlow DELTA 2 or EcoFlow DELTA 3?
- Neither, in any way you would notice: 895 Wh against 870 Wh is a 2.9% gap, which is smaller than the swing you get from running the same load on a cold morning. Treat them as the same size and decide on output, weight, or today's price instead. Both figures are estimated AC-delivered energy, not the nameplate battery rating — the watt-hours that actually reach your devices.
- Which has more AC output, the EcoFlow DELTA 2 or EcoFlow DELTA 3?
- Neither — both are rated 1,800 W continuous, so any load one can run, the other can too. Surge headroom follows the same order: 2,700 W against 3,600 W, and surge is what decides whether a compressor or pump actually starts.
- How does runtime compare between the EcoFlow DELTA 2 and EcoFlow DELTA 3?
- They run within 2.9% of each other on the same load — about 14.2 hours each on a refrigerator (full-size). Runtime will not separate these two; the deciding factor is somewhere else.
- Which is lighter, the EcoFlow DELTA 2 or EcoFlow DELTA 3?
- They are effectively the same to carry — 12 kg against 12.5 kg. Neither is meaningfully easier to move, so portability should not decide this one.
- Which recharges faster from the wall, the EcoFlow DELTA 2 or EcoFlow DELTA 3?
- The EcoFlow DELTA 3: 56 minutes from empty to full against 72 minutes, a difference of 16 minutes. This matters most between outages and during a short grid window — if you only ever recharge overnight, it does not matter at all.
- Which model should I buy for my use case?
- On the sub-scores that describe each use case: the EcoFlow DELTA 3 for home backup; the EcoFlow DELTA 2 for cpap & bedroom, camping & rv. They split, so the honest answer depends on which of those you are actually buying for.
- Are the EcoFlow DELTA 2 and EcoFlow DELTA 3 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 2 →
- Full scorecard, specs & price for EcoFlow DELTA 3 →
- See more alternatives to EcoFlow DELTA 2 →
- See more alternatives to EcoFlow DELTA 3 →
- 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 →