EcoFlow EFDELTA3U-US DELTA 3 Ultra Series Portable Power Station (3072Wh)

3600W Output—Powerful. Stable. Built to Handle It All
EcoFlow DELTA 3 Ultra (3072Wh) delivers 3600W rated-output, with X-Boost™ 3.0 technology, it supports devices up to 4600W—effortlessly handling heavy-duty appliances[2]. The inverter samples AC voltage and current every 33μs with high precision with a DSP chip, ensuring a pure sine wave output with beyond grid-level stability—ideal for powering sensitive electronics reliably.

Kitchen

Living Room

Laundry Room

Office

RV Camping

Garage

Go Hybrid—Extend Backup With a Smart Generator

Pair DELTA 3 Ultra (3072Wh) with an EcoFlow Smart Generator[3] to achieve longer runtime—automatically switching between fuel and battery to keep you powered through multi-day outages or off-grid adventures.

4 Ways to Charge Up — Ready in Just 1.48 Hrs[4]
Remote charging control for added peace of mind.

Wall Charging

1800W Input, 0-80% in 1.48 hrs. EcoFlow’s exclusive Storm Guard Mode[5] monitors severe weather alerts and automatically triggers AC charging remotely using industry-leading X-Stream fast charging tech—so it can be ready long before a disaster hits.

Generator Charging

With 1800W input, recharge to 80% in just 1.48 hrs^[6]. The EcoFlow Smart Generator 4000 (Dual Fuel) powers up DELTA 3 Ultra (3072Wh) for storms, outages, and off-grid living^[7].

Solar Charging

800W Input, 0-80% in 3.37 hrs. Pair it with EcoFlow Solar Panels (25% high-efficiency) for reliable power during camping trips, van life, or off-grid living^[8].

Alternator Charging

With the EcoFlow Alternator Charger[9], get ready fast while on the move.

Long-Lasting, Durable, Always Ready for Emergencies
Automotive-Grade Full-Tab LFP Cells
Rugged exterior and intelligent BMS for unmatched reliability

Built to Last
From battery chemistry to structural design, DELTA 3 Ultra (3072Wh) is engineered for extreme durability, environmental resilience, and whisper-quiet performance.

Smart, 24/7 Battery Protection

EcoFlow’s advanced BMS uses a high-performance ARM Cortex chipset and intelligent algorithms to monitor your battery in real time. By tracking SOC, SOH, temperature, and more, it ensures peak performance, extended battery life, and worry-free operation.

EV-Grade CTC Structure

Built with a cell-to-chassis (CTC) structure, DELTA 3 Ultra is drop-resistant (0.2m) and shockproof —protecting against overnight condensation and off-road bumps during transport. You get stable power even in the most demanding conditions^[10].

Extreme Environment Resistance

DELTA 3 Ultra keeps your power flowing through freezing cold, scorching heat, humid environments (95% humidity tolerance), or coastal air—for reliable energy anytime, anywhere[10].

Class B EMC Certification

Certified to Class B EMC standards, it won’t interfere with TVs, Wi-Fi, or other home electronics.

25dB Whisper-Quiet Operation Under Loads[11]

Powered by X-Quiet™ 3.0, EcoFlow’s stepless fan control adjusts airflow smoothly to maintain precise thermal regulation—keeping your home or workspace peacefully quiet, even under heavy loads.

Deeper Insights, Easier Control

Monitor your energy usage and solar generation—all with one intuitive dashboard. Set timed charging/discharging missions so that you can charge during off-peak hours and discharge during peak rate periods to save costs.

Compatibility

Footnotes:

1. Based on proper product usage, DELTA 3 Ultra (3072Wh) is estimated to have a lifespan of approximately 10 years, according to internal simulation test data. This information is for reference only; actual user experience may vary.
2. Single-appliance runtime based on ideal conditions; actual results may vary.
3. EcoFlow Smart Generators are sold separately.
4. All charging speed data comes from EcoFlow Labs and is for reference only. The actual data may vary slightly depending on the usage environment, device condition, software version, and other factors.
5. Feature requires preset activation via the EcoFlow App.
6. 0-80% in 1.48 hours was measured in optimal conditions using the EcoFlow Smart Generator 4000 (Dual Fuel).
7. EcoFlow Smart Generators are sold separately.
8. EcoFlow Solar Panels are sold separately.
9. EcoFlow Alternator Charger is sold separately.
10. Unless otherwise noted, all images, videos, and screen display contents about the product itself on this page are for reference only. Actual product effects (including but not limited to appearance, color, and size) and screen display contents (including but not limited to backgrounds, UI, and illustrations) may vary.
11. Noise levels measured at 1m under 25°C ambient: ≤25dB (600W) for charging/discharging.