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WATTMATRIX LAB BENCH // 230V 50Hz
☕
WILL POWER YOUR BOX FAN230V AC
21.3HRS
Continuous: 75W
Surge Peak: 140W

≈ 2.7 days (8h/day) · Safe motor start buffer (97.1% margin).

Ready to Run
Motor Start Margin+4660W Safe Buffer(140W Peak / 4800W Max)

How long will an EcoFlow DELTA 2 Max run a box fan?

box fan running (110 W max) and start-up (200 W max) draw fit the EcoFlow DELTA 2 Max's 2,400 W continuous / 4,800 W surge ratings.

LOW LOAD
29.7HRS

20-inch box fan running on low speed setting (50 W)

50 W68.99 W net
TYPICAL SPECNOMINAL
21.3HRS

20-inch box fan running on medium speed setting (75 W)

75 W96.06 W net
HIGH LOAD
15.3HRS

High-velocity industrial air circulator on maximum speed (110 W)

110 W134.06 W net
TELEMETRY // PRIMARY READOUT230V AC
CALIBRATED RUNTIME
21.3HRS

≈ 2.7 days (8h/day)

NET PACK DRAW
96.06W

System standby power: 15W (15.6% of total draw)

CONTINUOUS_LOAD_UTILIZATION3% (75W / 2400W)
APPLIANCE_DRAW75W RUN / 140W PK
SOURCE_LIMIT2400W CONT / 4800W PK
SOLAR_RECHARGE (1000W)2.69H (0.67D)
PARAMETER_SANDBOX // ENGINE v1.0.0

Live Load, Duty Cycle & Usage Simulator

75 W
MIN 25WNOMINAL 75WMAX 2000W
100%
5% INTERMITTENT50% CYCLING100% CONTINUOUS
8 h/day
1H / DAY8H OVERNIGHT24H CONTINUOUS
0 W
0W (OFF)200WMAX 1000W
TEMPERATURE DERATE
CONTINUOUS
21.3HRS
OUTAGE SPAN
2.7days
AVG LOAD
75W
PACK DRAW
96.06W
Stack box fan with other devices on EcoFlow DELTA 2 Max in the Load BuilderOpen Builder →
HARDWARE_INTERFACE // ELECTRICAL AUDIT

EcoFlow DELTA 2 Max × High-Velocity Box Fan Electrical Interface

1. AC RECEPTACLE & PLUG MATCH
BS 1363 / Europlug (230V 13A Domestic) → DIRECT FIT

Provides 6× CEE 7/3 (230V) (120V 60Hz).

2. WAVEFORM & THD SENSITIVITY
PURE SINE WAVE // STANDARD LOAD

Pure sine wave inverter output. Safe for all standard household appliances.

3. STARTING SURGE (MOTOR INRUSH) MARGIN
140W TYP (200W MAX) VS 4800W LIMIT

Inductive motor/compressor load with 1.9× starting surge (motor inrush) (97.1% worst-case surge margin).

4. UPS SWITCHOVER & EXPANSION
UPS: UPS (20MS) · EXPAND: UP TO 6144WH

Wall AC fast charge at up to 1800W (66m to 80%, 80m to 100%).

PHYSICS // TRANSIENT DRAW ENVELOPE

Dynamic Inrush Surge Curve (Locked Rotor Amps vs Steady State)

SAFE INRUSH HEADROOM (+4660W BUFFER)
0ms250ms500ms750ms1000ms0W2s Surge Limit (4800W)4800WContinuous Rating (2400W)2400WInrush (LRA): 140WRunning (FLA): 75W

Safe envelope verified: Starting surge (140W) remains comfortably below the 4800W surge trip line, with steady-state operation settling into the safe continuous zone at 75W.

LAB_RECORDS // EMPIRICAL OBSERVATIONS

Field Engineering Quirks & Operational Failure Modes

Hardware Bench Constraints (EcoFlow DELTA 2 Max)
  • ›X-Boost engages automatically above 2,400 W and runs resistive loads up to 3,400 W at reduced voltage. EcoFlow says it's meant for heating loads, not voltage-sensitive devices, and it's unavailable during wall-charging bypass.
  • ›UPS: switches to battery within 20 ms per the manual and product page (EcoFlow's FAQ says 30 ms). EcoFlow says it is not 0 ms and not suitable for servers or workstations.
  • ›The AC output switches off after 12 hours with no load; set the app's AC timeout to 'Never' for intermittent loads.
  • ›Two 500 W solar inputs give 1,000 W combined; EcoFlow's 43-minute 0–80% figure needs 1,800 W wall charging plus solar at the same time.
  • ›The car socket and both DC5521 ports share one 126 W budget.
  • ›All six AC outlets are 20 A T-slot NEMA 5-20R.
Cycle Physics & Dwell Behavior (High-Velocity Box Fan)
  • ›Shaded-pole fan motors create inductive reactive load; running on pure sine wave inverters avoids motor buzzing and overheating.
KNOWLEDGE_BASE // VERIFIED QA

Frequently Asked Questions: EcoFlow DELTA 2 Max & High-Velocity Box Fan

How long will an EcoFlow DELTA 2 Max run a box fan?

About 21.3 hours on AC power, with the box fan averaging 75 W (20-inch box fan running on medium speed setting (75 W)). The EcoFlow DELTA 2 Max then draws about 96 W from its battery, including 15 W for the inverter itself. Best case: about 30 hours (20-inch box fan running on low speed setting (50 W)). Worst case: about 15.3 hours (High-velocity industrial air circulator on maximum speed (110 W)). At 8 hours a day, that's about 2.7 days.

Can an EcoFlow DELTA 2 Max start a box fan?

Yes. The box fan's start-up peak of about 140 W (up to 200 W) fits within the EcoFlow DELTA 2 Max's 4,800 W surge rating, with 96% headroom even in the worst case.

Why isn't the runtime just 2,048 Wh ÷ 75 W?

That simple division gives 27 hours, but the EcoFlow DELTA 2 Max's inverter draws about 15 W whenever its AC outlets are on. At this light load that's 16% of everything the battery supplies, and inverter conversion losses take a further share. EcoFlow doesn't publish an idle figure and we haven't found an independent measurement, so this uses our 15 W estimate.

How long does the EcoFlow DELTA 2 Max take to recharge?

On wall power: about 66 minutes to 80% and 80 minutes to full (EcoFlow figures). With its maximum 1,000 W of solar input connected, expect about 800 W in full sun, so a full recharge takes roughly 2.7 hours of full sun, so it can refill in a single day with 4 peak sun hours.

AUDIT_LOG // DATA PROVENANCE & CITATIONS
NODE: ecoflow-delta-2-max/box-fanSYSTEM HASH: 0x9F8056CE72CBVERIFIED TIMESTAMP: 2026-10-21T00:00:00Z
SOURCE_CITATIONS // ECOFLOW DELTA 2 MAX (5)
LOAD_CITATIONS // HIGH-VELOCITY BOX FAN (1)