The EcoFlow DELTA 2 Max Extra Battery is a 2,048 Wh add-on pack, roughly 19 kg and 46.4 × 23.5 × 28.3 cm, designed to double or triple the capacity of a DELTA 2 Max Power Station to 4,096 Wh or 6,144 Wh for longer runtime on critical loads. The pack is also compatible with DELTA 3, DELTA 3 1500, DELTA 3 Plus, DELTA 2 and the EcoFlow DELTA Max 2000, so it can migrate to a new host station later. LiFePO4 chemistry rated for 3,000 cycles to 80% keeps the battery useful for many years.

• 2,048 Wh LiFePO4 add-on capacity to extend an already-installed DELTA power station
• Compatible with DELTA 2 Max, DELTA 2, DELTA 3, DELTA 3 1500, DELTA 3 Plus and DELTA Max 2000
• Balanced charge and discharge with the host station keeps state-of-charge uniform across the pack
• Direct 1,800 W DC fast charge via the extra battery port when using the Dual Fuel Smart Generator, even when disconnected from the host
• Front LCD shows remaining charge, remaining time and port status without needing the host display
• Full protection stack: over-voltage, over-load, over-heat, short-circuit and low-temperature safeguards

Key specs

• Capacity: 2,048 Wh
• Cell chemistry: LiFePO4
• Cycles: 3,000 cycles to 80% capacity
• Weight: approx. 19 kg
• Dimensions: 46.4 × 23.5 × 28.3 cm
• Warranty: 5 years
• Storage recommendation: discharge to 30% for long-term storage, recharge to 60% every 3 months

The Extra Battery is aimed at owners who need extended runtime for a home fridge and heating during outages, longer off-grid stays in a van or camper, or full-day event power without swapping batteries.