MC4 to XT60 solar cable. 

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. That includes EcoFlow or third-party panels. If you want to charge the Delta or River series power stations with solar panels that have MC4 compatibility, use the MC4 to XT60 cable to connect the two. Connect a solar panel to an EcoFlow power station for clean, efficient, and reliable power wherever you go.Perfect for use on campsites, beach trips, and family barbecues.