The EcoFlow DELTA Pro Extra Battery adds 3,600 Wh of LiFePO4 storage to an existing DELTA Pro or DELTA Pro 3 Power Station. It weighs about 38 kg and measures 63.5 x 28.5 x 41.6 cm, matching the footprint of the main unit. Plugged in, it effectively doubles usable capacity to 7,200 Wh, and stacking a second one lifts a DELTA Pro to 10.8 kWh of off-grid runtime.

• 3,600 Wh LiFePO4 (LFP) storage per unit, 3,500 cycles to 80% capacity (6,500 to 50%).
• Doubles the runtime of a DELTA Pro or DELTA Pro 3, or triples it with two extra batteries.
• Charges and discharges in parallel with the main unit, no user action needed.
• Can be integrated into home wiring together with a compatible DELTA Pro for whole-home backup.
• Chargeable directly via the EcoFlow Smart Generator for a resilient off-grid setup.
• On-board LCD shows battery percentage, remaining time and status at a glance.

Key specs

• Capacity: 3,600 Wh
• Cell chemistry: LiFePO4 (LFP)
• Life cycles: 3,500 cycles to 80% (6,500 to 50%)
• Weight: ca. 38 kg
• Dimensions: 63.5 x 28.5 x 41.6 cm
• Certifications: UL2743, CE, WEEE, ROHS, UKCA, RCM, GOST
• Warranty: 5 years

A natural upgrade for households that already own a DELTA Pro and want two-day emergency autonomy, or for a professional site where the main station runs high loads all day. Certification-wise the pack carries UL2743, CE, WEEE, RoHS, UKCA, RCM and GOST marks, which matters for professional users deploying the battery in field cabinets, filming trucks or event rigs where compliance paperwork is expected. Combined with the flat 63.5 x 28.5 x 41.6 cm case, the extra battery stacks tidily next to the main DELTA Pro without cluttering the floor around it.