EcoFlow MC4 to XT60 Solar Cable 3.5m. The EcoFlow MC4 to XT60 cable (3.5m) allows you to connect an EcoFlow portable power station (DELTA/RIVER Series) to a solar panel with standard MC4 output.. Highlights. Connect a solar panel to an EcoFlow power station for clean, efficient, and reliable power wherever you go.. Inside the Box. 3.5m EcoFlow MC4 to XT60 Solar Cable ×1. Specifications. Cable type: MC4 to XT60 Solar Cable Length: 3.5m