Shipping starts from late Dec. The EcoFlow AC Generator Charging Adapter allows you to charge your EcoFlow DELTA Pro Ultra using generators with a NEMA L14-30R port. * Purchase an EcoFlow NEMA L14-30R to L14-30P Generator Cord (4.9 ft / 1.5 m) for an extension. Specifications: AC input: 240V 30A AC output: 240V 30A Length: 1.6 ft (480 mm)