EcoFlow Launches Gen4 Portable Power Stations with Improved Energy Density

EcoFlow released two new portable power stations with higher energy density than previous models, enabling more power in smaller physical space for European users.

EcoFlow has launched the River 260 Gen4 (256Wh capacity) and River 520 Gen4 (512Wh capacity) portable power stations. Both models use lithium iron phosphate batteries and feature higher volumetric energy density—59.5 Wh/L for the 260 and 90.9 Wh/L for the 520—meaning they deliver more power per liter of space than earlier versions. The 260 model provides 300W continuous output with four USB ports and one AC jack, while the 520 delivers 500W continuous output with two AC jacks. Both support USB-C PD3.1 bidirectional charging and ultra-fast UPS cutover under 10ms. The 260 will ship in Europe during Q4 2026, with the 520 available in Q1 2027. Pricing details remain undisclosed. This improvement in energy density directly supports portable energy access by reducing physical footprint without sacrificing capacity—a critical factor for users needing reliable power in constrained spaces. The source does not confirm whether this represents a meaningful size reduction for existing users or durability gains beyond the stated technical specs.

Source: The Verge