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Bluetti Apex 300 vs EcoFlow DELTA 3 Ultra

Bluetti Apex 300 — front view

Bluetti Apex 300

71BatteryRank score · Excellent
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Decision readout
Better station

Bluetti Apex 300 leads by 10 points overall.

EcoFlow DELTA 3 Ultra — front view

EcoFlow DELTA 3 Ultra

61BatteryRank score · Balanced
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What changes the decision

By the BatteryRank Engineering Team

01 · Score evidence

Score breakdown

71
Bluetti Apex 300
Overall
61
EcoFlow DELTA 3 Ultra
54
POWER
EcoFlow DELTA 3 Ultra +8
62

Battery-side usable capacity and how much you can run at once.

87
TRUST
Bluetti Apex 300 +24
63

Owner reputation, safety record, warranty, and build durability.

91
CHARGING
Bluetti Apex 300 +32
59

Wall and solar recharge speed.

55
LIVABILITY
Tied
55

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 Apex 300
Rated (on the box)
2,764.8 Wh. Show sourceclaimed sourcebluettipower.com ↗2026-07-04

The marketing number — total cell capacity.

AC deliveredmeasured
2,550–2,580 Wh. Show sourceverified source~2,550-2,580 Wh delivered (Trusted Reviews, ~92-93.5% at load)2026-07-04

~2,550-2,580 Wh delivered (Trusted Reviews, ~92-93.5% at load) · 7% below the label

EcoFlow DELTA 3 Ultra
Rated (on the box)
3,072 Wh. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04

The marketing number — total cell capacity.

AC delivered (est.)
2,611 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 Apex 300 and EcoFlow DELTA 3 Ultra
DeviceBluetti Apex 300EcoFlow DELTA 3 UltraAssumption
CPAP (humidifier off)about 35.6 nightsabout 36.3 nights9 W ·
CPAP (heated humidifier on)about 5.7 nightsabout 5.8 nights56 W ·
Refrigerator (full-size)about 41 hoursabout 41 hours180 W × 35% duty cycle ·
Wi-Fi router + modemabout 143 hoursabout 145 hours18 W ·
Laptop (65W charger)about 79 hoursabout 80 hours65 W × 50% duty cycle ·
Phone (one full charge)about 128 full chargesabout 130 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 Apex 300 and EcoFlow DELTA 3 Ultra
SpecBluetti Apex 300EcoFlow DELTA 3 Ultra
AC-delivered capacity
2,565 Whverified. Show sourceverified source~2,550-2,580 Wh delivered (Trusted Reviews, ~92-93.5% at load)2026-07-04
2,611 Whest.. Show sourceestimated sourceus.ecoflow.com ↗2026-07-04
Continuous power output
3,840 W. Show sourceclaimed sourcebluettipower.com ↗2026-07-04
3,600 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04
Surge power output
7,680 W. Show sourceclaimed sourcebluettipower.com ↗2026-07-04
7,200 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04
Max solar input
2,400 W. Show sourceclaimed sourcebluettipower.com ↗2026-07-04
800 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04
AC charge time (0–100%)—
89 min. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04
Weight
38 kg. Show sourceclaimed sourcebluettipower.com ↗2026-07-04
32.7 kg. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04
Rated cycle life
6,000 cycles. Show sourceclaimed sourcebluettipower.com ↗2026-07-04
4,000 cycles. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04

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 Apex 300 better than the EcoFlow DELTA 3 Ultra?
Bluetti Apex 300 leads by 10 points overall.
Which has more usable capacity, the Bluetti Apex 300 or EcoFlow DELTA 3 Ultra?
Neither, in any way you would notice: 2,565 Wh against 2,611 Wh is a 1.8% 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 Bluetti Apex 300 or EcoFlow DELTA 3 Ultra?
The Bluetti Apex 300: 3,840 W versus 3,600 W continuous. That gap matters only if a load sits between the two numbers — below 3,600 W both run it, above 3,840 W neither does. Surge headroom follows the same order: 7,680 W against 7,200 W, and surge is what decides whether a compressor or pump actually starts.
How does runtime compare between the Bluetti Apex 300 and EcoFlow DELTA 3 Ultra?
They run within 1.8% of each other on the same load — about 40.7 hours each on a refrigerator (full-size). Runtime will not separate these two; the deciding factor is somewhere else.
Which is lighter, the Bluetti Apex 300 or EcoFlow DELTA 3 Ultra?
The EcoFlow DELTA 3 Ultra, by 5.3 kg (32.7 kg versus 38 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 3 Ultra for home backup, camping & rv. One model leads every use case we score here, which makes this an unusually clean choice.

Keep deciding

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

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