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Bluetti AC70 vs EcoFlow DELTA 3 Plus

Bluetti AC70 — front view

Bluetti AC70

71BatteryRank score · Excellent
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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+21
    56 min vs 75 min to full · 1,000 W vs 500 W solar input
  • livabilityEcoFlow DELTA 3 Plus+6
EcoFlow DELTA 3 Plus — front view

EcoFlow DELTA 3 Plus

72BatteryRank score · Excellent
What changes the decision

By the BatteryRank Engineering Team

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 sourceclaimed sourcebluettipower.com2026-07-04https://www.bluettipower.com/products/ac70

The marketing number — total cell capacity.

AC delivered (est.)
653 Wh. Show sourceestimated sourceestimate = battery-side usable capacity × 85% inverter efficiency

What 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 sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station

The marketing number — total cell capacity.

AC delivered (est.)
870 Wh. Show sourceestimated sourceestimate = battery-side usable capacity × 85% inverter efficiency

What reaches an AC outlet — about 15% is lost turning battery power into household AC. How we estimate.

03 · Same assumptions

Same-device runtime

Estimated runtime for the same sourced devices on Bluetti AC70 and EcoFlow DELTA 3 Plus
DeviceBluetti AC70EcoFlow DELTA 3 PlusAssumption
CPAP (humidifier off)about 9.1 nightsabout 12.1 nights9 W ·
CPAP (heated humidifier on)about 1.5 nightsabout 1.9 nights56 W ·
Refrigerator (full-size)about 10 hoursabout 14 hours180 W × 35% duty cycle ·
Wi-Fi router + modemabout 36 hoursabout 48 hours18 W ·
Laptop (65W charger)about 20 hoursabout 27 hours65 W × 50% duty cycle ·
Phone (one full charge)about 32 full chargesabout 43 full charges20 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

Key sourced specifications for Bluetti AC70 and EcoFlow DELTA 3 Plus
SpecBluetti AC70EcoFlow DELTA 3 Plus
AC-delivered capacity
653 Whest.. Show sourceestimated sourcebluettipower.com2026-07-04https://www.bluettipower.com/products/ac70
870 Whest.. Show sourceestimated sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station
Continuous power output
1,000 W. Show sourceclaimed sourcebluettipower.com2026-07-04https://www.bluettipower.com/products/ac70
1,800 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station
Surge power output
2,000 W. Show sourceclaimed sourcebluettipower.com2026-07-04https://www.bluettipower.com/products/ac70
3,600 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station
Max solar input
500 W. Show sourceclaimed sourcebluettipower.com2026-07-04https://www.bluettipower.com/products/ac70
1,000 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station
AC charge time (0–100%)
75 min. Show sourceclaimed sourcebluettipower.com2026-07-04https://www.bluettipower.com/products/ac70
56 min. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station
Weight
10.2 kg. Show sourceclaimed sourcebluettipower.com2026-07-04https://www.bluettipower.com/products/ac70
12.5 kg. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station
Rated cycle life
3,000 cycles. Show sourceclaimed sourcebluettipower.com2026-07-04https://www.bluettipower.com/products/ac70
4,000 cycles. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station

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

Where to buy

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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

Scores computed from sourced data · prices timestamped · tap or focus a figure to view its source

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