WILL POWER YOUR OXYGEN CONCENTRATOR230V AC

5.2HRS

Continuous: 350W

Surge Peak: 500W

≈ 0.2 days (24h/day) · Safe motor start buffer (89.6% margin).

Ready to Run

Motor Start Margin+4300W Safe Buffer(500W Peak / 4800W Max)

How long will an EcoFlow DELTA 2 Max run an oxygen concentrator?

Q: How long will an EcoFlow DELTA 2 Max run an oxygen concentrator?

About 5.2 hours on AC power, with the oxygen concentrator averaging 350 W (standard prescription flow rate 3 LPM continuous operation (350 W)). The EcoFlow DELTA 2 Max then draws about 398 W from its battery, including 15 W for the inverter itself. Best case: about 6.4 hours (low flow setting 1–2 LPM continuous delivery (280 W)). Worst case: about 4.3 hours (maximum continuous flow setting 5 LPM at maximum pressure (420 W)).

Q: Can an EcoFlow DELTA 2 Max start an oxygen concentrator?

Yes. The oxygen concentrator's start-up peak of about 500 W (up to 650 W) fits within the EcoFlow DELTA 2 Max's 4,800 W surge rating, with 86% headroom even in the worst case.

Q: 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.

Q: Can the EcoFlow DELTA 2 Max keep an oxygen concentrator running during a power cut?

It can act as a backup supply: with the oxygen concentrator plugged into the EcoFlow DELTA 2 Max and the EcoFlow DELTA 2 Max plugged into the wall, it switches the oxygen concentrator to battery in about 20 ms when the grid fails (EcoFlow calls this UPS mode).

oxygen concentrator running (420 W max) and start-up (650 W max) draw fit the EcoFlow DELTA 2 Max's 2,400 W continuous / 4,800 W surge ratings.

LOW LOAD

6.4HRS

low flow setting 1–2 LPM continuous delivery (280 W)

280 W320.18 W net

TYPICAL SPECNOMINAL

5.2HRS

standard prescription flow rate 3 LPM continuous operation (350 W)

350 W397.57 W net

HIGH LOAD

4.3HRS

maximum continuous flow setting 5 LPM at maximum pressure (420 W)

420 W475.4 W net

TELEMETRY // PRIMARY READOUT230V AC

CALIBRATED RUNTIME

5.2HRS

≈ 0.2 days (24h/day)

NET PACK DRAW

397.57W

System standby power: 15W (3.8% of total draw)

CONTINUOUS_LOAD_UTILIZATION15% (350W / 2400W)

APPLIANCE_DRAW350W RUN / 500W 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

Active Running Load350 W

MIN 140WNOMINAL 350WMAX 2000W

Compressor / Cycling Duty Factor100%

5% INTERMITTENT50% CYCLING100% CONTINUOUS

Active Usage Window per Day24 h/day

1H / DAY8H OVERNIGHT24H CONTINUOUS

Solar Generation Array0 W

0W (OFF)200WMAX 1000W

TEMPERATURE DERATE

CONTINUOUS

5.2HRS

OUTAGE SPAN

0.2days

AVG LOAD

350W

PACK DRAW

397.57W

Stack oxygen concentrator with other devices on EcoFlow DELTA 2 Max in the Load BuilderOpen Builder →

HARDWARE_INTERFACE // ELECTRICAL AUDIT

EcoFlow DELTA 2 Max × Home Medical Oxygen Concentrator Electrical Interface

1. AC RECEPTACLE & PLUG MATCH

BS 1363 (230V 13A Irish Standard Plug) → DIRECT FIT

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

2. WAVEFORM & THD SENSITIVITY

PURE SINE WAVE // THD-SENSITIVE LOAD

Pure sine wave inverter output. Safe for sensitive medical electronics and variable-speed motors.

3. STARTING SURGE (MOTOR INRUSH) MARGIN

500W TYP (650W MAX) VS 4800W LIMIT

Inductive motor/compressor load with 1.4× starting surge (motor inrush) (89.6% 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 (+4300W BUFFER)

Safe envelope verified: Starting surge (500W) remains comfortably below the 4800W surge trip line, with steady-state operation settling into the safe continuous zone at 350W.

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 (Home Medical Oxygen Concentrator)

›Continuous 24/7 medical operation consumes roughly 8.4 kWh per day (350 W × 24h), requiring sizable battery capacity or ongoing solar generation to sustain.
›Because it relies on an internal compressor and sensitive electronic cycle valves, pure sine wave power (<3% THD) is required to prevent motor overheating.
›Brief switchover gaps greater than 50 ms can trigger the internal low-pressure alarm and require a manual machine power cycle.

KNOWLEDGE_BASE // VERIFIED QA

Frequently Asked Questions: EcoFlow DELTA 2 Max & Home Medical Oxygen Concentrator