DELTA 3 Ultra Plus delivers 3600W rated-output (7200W surge) , with X-Boost™ 3.0 technology, it supports devices up to 4600W—effortlessly handling heavy-duty appliances. 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.

Covers essential power needs during a 4–10 hour outage—keeping food fresh, heat running, lights on, and communication devices charged. 

1-Day Outage

Delivers 1 days of outage protection—ensuring uninterrupted cooking, heating, lighting, and connectivity. 

2-Day Outage

Powers home essentials for up to 2 days with 7kWh capacity—keeping your kitchen running, lights on, and devices connected. 

3-Day Outage

Supports a family of four through 3 days of everyday living with 11kWh capacity—keeping food fresh, heat running, lights on, and entertainment devices charged. 

 

Go Hybrid—Extend Backup with a Smart Generator

Pair DELTA 3 Ultra Plus with an EcoFlow Smart Generator to achieve longer runtime—automatically switching between fuel and battery to keep you powered through multi-day outages or off-grid adventure.

Two Easy Ways to Connect to Your Home

6 Ways to Charge Up — Ready in Just 48 Mins 

Wall Charging

1800W Input, 0-80% in 89 mins.  EcoFlow’s exclusive Storm Guard Mode 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

Charges at up to 3200W via smart generator—0–80% in 53 minutes. With exclusive Generator Auto Start/Stop Mode, [11] the EcoFlow Smart Generator 4000 (Dual Fuel) recharges DELTA 3 Ultra Plus automatically when battery levels run low—delivering hands-free backup power for storms, outages, and off-grid use.

Solar Charging

1600W input, 0–80% in 101 mins. After the storm clears, just 101 mins of sunlight is all it takes to recharge DELTA 3 Ultra Plus. Pair it with EcoFlow 400W Solar Panels (25% high-efficiency) for reliable power during camping trips, van life, or off-grid living.

Alternator Charging

1000W Input, 0-80% in 142 mins. With EcoFlow Alternator Charger Plus 1000,  get ready in just over 2 hours while on the move—10× faster than conventional solutions. 

Solar + Generator Dual Charging

3960W Input, 0-80% in 48 mins. Fastest charge in just 48 mins with 3960W dual input from solar panels and the Smart Generator 4000.

Solar + Alternator Dual Charging

2600W Input, 0-80% in 60 mins. Dual input from 1600W solar and 1000W alternator charging keeps you powered faster than ever, even on the go.

 

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 Plus is engineered for extreme durability, environmental resilience, and whisper-quiet performance—delivering power you can count on for over 10 years. 

 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.

CTC Structure

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

Durable Qualities

DELTA 3 Ultra Plus keeps your power flowing through freezing cold, scorching heat, humid environments (95% humidity tolerance), or coastal air (5% salt spray resistance).

Class B Certified

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

25dB 

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, savings, and solar generation—all with one intuitive dashboard. Easily track battery status, real-time electricity rates, and financial savings.

Compatibility