Use this AC Generator Charging Adapter to charge your EcoFlow DELTA Pro Ultra portable power station from a generator. The adapter has an NEMA L14-30P connector on the generator end and an EcoFlow 5P8 connector for the portable power station.
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I looked at many sites and google searches to see if this cable will charge my Delta Pro 3. Nothing solid. The manual does list this cable BUT this website page does not even mention the DP3. So I was unsure it was compatible. I emailed support and after a few days, they said yes. I bought this Nov 14, 2025 and can confirm this cable charges the DP3 at 4,000 watts. HOWEVER, your generator must be fairly strong. I'm using a gas Firman 7500 watts continuous. If you use a small wattage generator, I'm fairly sure it wont charge at 4k watts. Also, I hope Ecoflow add this note to this web page "Supported Model include: DP3" because in the description, it only lists the DP Ultra as the only unit supported. I wished DP3 support information was added here so I wouldn't waste a lot of time searching the internet and emailing support.
We already had a 220 alternate panel so we went with the nema 14 connector adapter.