Bluetti AC70
71BatteryRank score · Excellent
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Bluetti AC70 vs EcoFlow DELTA 3 Plus
Decision readout
Better station
Bluetti AC70 takes capacity and output, EcoFlow DELTA 3 Plus takes recharge speed — the decision is which of those you need, not overall quality. If neither is your constraint, the composite tiebreak goes to EcoFlow DELTA 3 Plus by 1 point — a hair, not a mandate.
- powerBluetti AC70+11
- chargingEcoFlow DELTA 3 Plus+2156 min vs 75 min to full · 1,000 W vs 500 W solar input
- livabilityEcoFlow DELTA 3 Plus+6
EcoFlow DELTA 3 Plus
72BatteryRank score · Excellent
What changes the decision
- Home backup: Bluetti AC70 — stronger combined capacity and AC-output score
- CPAP & bedroom: Bluetti AC70 — quieter under load
- Camping & RV: EcoFlow DELTA 3 Plus — lighter and easier to carry
01 · Score evidence
Score breakdown
71
Bluetti AC70
Overall
72
EcoFlow DELTA 3 Plus
81
POWER
Bluetti AC70 +11
70
Battery-side usable capacity and how much you can run at once.
74
TRUST
EcoFlow DELTA 3 Plus +3
77
Owner reputation, safety record, warranty, and build durability.
58
CHARGING
EcoFlow DELTA 3 Plus +21
79
Wall and solar recharge speed.
51
LIVABILITY
EcoFlow DELTA 3 Plus +6
57
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.
Bluetti AC70
Rated (on the box)
768 Wh. Show source
claimed sourcebluettipower.com ↗2026-07-04The marketing number — total cell capacity.
AC delivered (est.)
653 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.
EcoFlow DELTA 3 Plus
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 | Bluetti AC70 | EcoFlow DELTA 3 Plus | Assumption |
|---|---|---|---|
| CPAP (humidifier off) | about 9.1 nights | about 12.1 nights | 9 W · |
| CPAP (heated humidifier on) | about 1.5 nights | about 1.9 nights | 56 W · |
| Refrigerator (full-size) | about 10 hours | about 14 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 36 hours | about 48 hours | 18 W · |
| Laptop (65W charger) | about 20 hours | about 27 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 32 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 | Bluetti AC70 | EcoFlow DELTA 3 Plus |
|---|---|---|
| AC-delivered capacity | 653 Whest.. Show sourceestimated sourcebluettipower.com ↗2026-07-04 | 870 Whest.. Show sourceestimated sourceus.ecoflow.com ↗2026-07-04 |
| Continuous power output | 1,000 W. Show sourceclaimed sourcebluettipower.com ↗ | 1,800 W. Show sourceclaimed sourceus.ecoflow.com ↗ |
| Surge power output | 2,000 W. Show sourceclaimed sourcebluettipower.com ↗ | 3,600 W. Show sourceclaimed sourceus.ecoflow.com ↗ |
| Max solar input | 500 W. Show sourceclaimed sourcebluettipower.com ↗ | 1,000 W. Show sourceclaimed sourceus.ecoflow.com ↗ |
| AC charge time (0–100%) | 75 min. Show sourceclaimed sourcebluettipower.com ↗ | 56 min. Show sourceclaimed sourceus.ecoflow.com ↗ |
| Weight | 10.2 kg. Show sourceclaimed sourcebluettipower.com ↗ | 12.5 kg. Show sourceclaimed sourceus.ecoflow.com ↗ |
| Rated cycle life | 3,000 cycles. Show sourceclaimed sourcebluettipower.com ↗ | 4,000 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
Quick answers
- Is the Bluetti AC70 better than the EcoFlow DELTA 3 Plus?
- Bluetti AC70 takes capacity and output, EcoFlow DELTA 3 Plus takes recharge speed — the decision is which of those you need, not overall quality. If neither is your constraint, the composite tiebreak goes to EcoFlow DELTA 3 Plus by 1 point — a hair, not a mandate.
- Which has more usable capacity, the Bluetti AC70 or EcoFlow DELTA 3 Plus?
- The EcoFlow DELTA 3 Plus, by 217 Wh — 653 Wh versus 870 Wh, a 33% advantage. At a 60 W load that is roughly 3.6 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 Bluetti AC70 or EcoFlow DELTA 3 Plus?
- The EcoFlow DELTA 3 Plus: 1,000 W versus 1,800 W continuous. That gap matters only if a load sits between the two numbers — below 1,000 W both run it, above 1,800 W neither does. Surge headroom follows the same order: 2,000 W against 3,600 W, and surge is what decides whether a compressor or pump actually starts.
- How does runtime compare between the Bluetti AC70 and EcoFlow DELTA 3 Plus?
- On the same sourced load — a refrigerator (full-size) — the EcoFlow DELTA 3 Plus runs longer: 13.8 hours against 10.4. 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 Bluetti AC70 or EcoFlow DELTA 3 Plus?
- The Bluetti AC70, by 2.3 kg (10.2 kg versus 12.5 kg). Both weights are manufacturer figures for the bare unit; cables and a solar panel add to whatever you actually carry.
- Which recharges faster from the wall, the Bluetti AC70 or EcoFlow DELTA 3 Plus?
- The EcoFlow DELTA 3 Plus: 56 minutes from empty to full against 75 minutes, a difference of 19 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 Bluetti AC70 for home backup, cpap & bedroom; the EcoFlow DELTA 3 Plus for camping & rv. They split, so the honest answer depends on which of those you are actually buying for.
Keep deciding
- Full scorecard, specs & price for Bluetti AC70 →
- Full scorecard, specs & price for EcoFlow DELTA 3 Plus →
- See more alternatives to Bluetti AC70 →
- See more alternatives to EcoFlow DELTA 3 Plus →
- 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 →