The EcoFlow DELTA 2 Extra Battery is a 1,024 Wh add-on pack that doubles a DELTA 2 Power Station to 2,048 Wh. At roughly 9.5 kg and 40 × 21.1 × 28.1 cm it matches the DELTA 2 footprint so the two units stack neatly side by side. It is also compatible with DELTA 3, DELTA 3 1500 and DELTA 3 Plus, so the same battery can move to a newer host station later. LiFePO4 cells rated for 3,000 cycles to 80% capacity give it a long working life for daily backup and off-grid use.

• 1,024 Wh LiFePO4 add-on capacity dedicated to the DELTA 2, DELTA 3, DELTA 3 1500 and DELTA 3 Plus
• Simultaneous charge and discharge with the host station: state-of-charge stays balanced across both packs
• Full recharge in about 60 minutes and 0–80% in about 45 minutes when paired with a DELTA 2 on the AC input
• Extra battery port at DC 51.2 V, up to 2,048 W, for direct high-power charging
• Internal storage compartment for small accessories and cables
• Compatible with all DELTA charge paths: solar, wall socket and Smart Generator

Key specs

• Capacity: 1,024 Wh
• Cell chemistry: LiFePO4
• Cycles: 3,000 cycles to 80% capacity
• Extra battery port: DC 51.2 V, 2,048 W max
• Weight: approx. 9.5 kg
• Dimensions: 40 × 21.1 × 28.1 cm
• Warranty: 5 years

The DELTA 2 Extra Battery suits users who need a second night on a camping trip, longer runtime for a fridge and lighting during power cuts, or a heavier daily load on a mobile workstation without swapping units. With 3,000 cycles to 80% capacity it also justifies itself as a long-term investment for anyone using a DELTA 2 as a semi-permanent home backup.