WILL POWER YOUR OXYGEN CONCENTRATOR230V AC

2.6HRS

Continuous: 350W

Surge Peak: 500W

≈ 0.1 days (24h/day) · Safe motor start buffer (81.5% margin).

Ready to Run

Motor Start Margin+2200W Safe Buffer(500W Peak / 2700W Max)

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

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

About 2.6 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 then draws about 399 W from its battery, including 15 W for the inverter itself. Best case: about 3.2 hours (low flow setting 1–2 LPM continuous delivery (280 W)). Worst case: about 2.1 hours (maximum continuous flow setting 5 LPM at maximum pressure (420 W)).

Q: Can an EcoFlow DELTA 2 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's 2,700 W surge rating, with 76% headroom even in the worst case.

Q: How long does the EcoFlow DELTA 2 take to recharge?

On wall power: about 50 minutes to 80% and 80 minutes to full (EcoFlow figures). With its maximum 500 W of solar input connected, expect about 400 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 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 and the EcoFlow DELTA 2 plugged into the wall, it switches the oxygen concentrator to battery in about 30 ms when the grid fails (EcoFlow calls this EPS mode).

oxygen concentrator running (420 W max) and start-up (650 W max) draw fit the EcoFlow DELTA 2's 1,800 W continuous / 2,700 W surge ratings.

LOW LOAD

3.2HRS

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

280 W321.35 W net

TYPICAL SPECNOMINAL

2.6HRS

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

350 W399.4 W net

HIGH LOAD

2.1HRS

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

420 W478.07 W net

TELEMETRY // PRIMARY READOUT230V AC

CALIBRATED RUNTIME

2.6HRS

≈ 0.1 days (24h/day)

NET PACK DRAW

399.4W

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

CONTINUOUS_LOAD_UTILIZATION19% (350W / 1800W)

APPLIANCE_DRAW350W RUN / 500W PK

SOURCE_LIMIT1800W CONT / 2700W PK

SOLAR_RECHARGE (500W)2.69H (0.67D)

PARAMETER_SANDBOX // ENGINE v1.0.0

Live Load, Duty Cycle & Usage Simulator

Active Running Load350 W

MIN 140WNOMINAL 350WMAX 1800W

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 500W

TEMPERATURE DERATE

CONTINUOUS

2.6HRS

OUTAGE SPAN

0.1days

AVG LOAD

350W

PACK DRAW

399.4W

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

HARDWARE_INTERFACE // ELECTRICAL AUDIT

EcoFlow DELTA 2 × Home Medical Oxygen Concentrator Electrical Interface

1. AC RECEPTACLE & PLUG MATCH

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

Provides 2× 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 2700W LIMIT

Inductive motor/compressor load with 1.4× starting surge (motor inrush) (81.5% worst-case surge margin).

4. UPS SWITCHOVER & EXPANSION

UPS: EPS (30MS) · EXPAND: UP TO 3072WH

Wall AC fast charge at up to 1200W (50m to 80%, 80m to 100%).

PHYSICS // TRANSIENT DRAW ENVELOPE

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

SAFE INRUSH HEADROOM (+2200W BUFFER)

Safe envelope verified: Starting surge (500W) remains comfortably below the 2700W 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)

›X-Boost engages automatically above 1,800 W and runs resistive loads up to 2,200 W at reduced voltage. EcoFlow says it's meant for heating loads, not voltage-sensitive devices, and it's unavailable while the AC output is in wall-charging bypass.
›EPS mode: on wall power, connected loads run from the grid and switch to battery within 30 ms if the power fails. EcoFlow says this 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 such as fridges.
›Only 2 of the 6 AC outlets are grounded (NEMA 5-20R); the other 4 are two-prong NEMA 1-15R.
›The car socket and both DC5521 ports share one 126 W budget.
›EcoFlow's US product page lists 3,000 cycles to 80%, while the July 2025 US manual says 4,000; we use 3,000.

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 & Home Medical Oxygen Concentrator