The EcoFlow DELTA 3 Ultra series (3072Wh) delivers powerful, quiet, and reliable energy for home backup, off-grid living, and high-demand appliances. Both models offer 3600W continuous output with 7200W surge capacity, and X-Boost™ mode supports heavy-duty devices up to 4600W. Built with automotive-grade LFP batteries, they’re designed for 10 years of reliable use, ultra-quiet 25dB operation, and seamless home integration via Manual Transfer Switch or Inlet Box with a 10ms auto-switch.
 
The DELTA 3 Ultra supports 4 charging methods and reaches 0–80% in 89 minutes, with extended runtime available through the EcoFlow Smart Generator.
 
The DELTA 3 Ultra Plus adds advanced flexibility with Smart Output Priority, 6 charging methods, and ultra-fast charging—0–80% in just 48 minutes using Solar + Generator dual charging. It also features expandable capacity from 3–11kWh and supports automatic generator start/stop for longer, hands-free backup power.
 
Both models are managed through the EcoFlow OASIS 3.0 Smart App, offering real-time monitoring, Storm Guard Mode, and energy-saving automation, and are backed by up to a 5-year warranty with app registration.