Launch Event and Product Lineup
The company announced the new series on November 4 ahead of a Miami showcase, unveiling two Delta models (3800 Gen4 and 3000 Gen4) and two River models (260 Gen4 and 520 Gen4).
Delta 3800 Gen4 packs 3,763 Wh and weighs 67.5 lb; Delta 3000 Gen4 holds 3,072 Wh at 57.3 lb. River 260 Gen4 delivers 256 Wh in a 6.6 lb chassis, while River 520 Gen4 offers 512 Wh at 10.1 lb.
Key Specifications and Performance
Both Delta units supply 3.6 kW continuous AC output with a 7.2 kW surge capacity. River models provide 300 W (260) and 500 W (520) output.
EcoFlow claims up to a 70 % reduction in self‑consumption, drawing 14 W with AC on and 3 W in standby, versus industry averages above 20 W and 10 W.
Fast‑charging capability reaches 0‑80 % in 42 minutes for the River 260 and 50 minutes for the River 520.
Pricing and Early‑Bird Discounts
Delta 3000 Gen4 is listed at $1,699 and Delta 3800 Gen4 at $2,199; launch‑code DG4EDM reduces the shipped price to $1,214.05 and $1,614.05 respectively.
River Gen4 pre‑sales start November 24, with regular sales slated for December 4; Black Friday pricing runs through December 7, offering up to 58 % off select units.
Technical Features: Emergency Power Mode and Fridge Runtime Boost
All four models include Emergency Power Mode, which reserves enough DC power for essential devices even when the display reads 0 %.
Fridge Runtime Boost extends refrigerator operation to 58 hours on the Delta 3000 and 70 hours on the Delta 3800, cutting energy use between cooling cycles.
Market Context and Competition
EcoFlow positions the Delta Gen4 series as the lightest in its class, achieving 55.7 Wh per pound versus Anker’s S5000 at 51.8 Wh per pound.
With rising demand for resilient backup power amid extreme weather, the expanded capacity (up to 12 kWh via modular batteries) and AI‑optimized management aim to capture both home‑backup and outdoor‑adventure segments.
Next‑generation units will be available for shipment beginning immediately, with the River Gen4 series shipping after the December 4 launch date.
Sources
- EcoFlow launches new Delta Gen4 and River Gen4 series in the U.S. – Energy Storage
- EcoFlow RIVER Gen4: smaller, lighter power for camping
- EcoFlow Unveils DELTA Gen4 and RIVER Gen4 Series, Delivering Longer-Lasting Power in Smaller, Lighter Designs
- EcoFlow’s new power stations can keep devices running even when the battery hits 0%
- EcoFlow launches DELTA Gen4 Series power stations and bundles with up to $1,435 savings from $1,214
Photo: Vyacheslav Argenberg (CC BY 4.0)
