EcoFlow DELTA 2 Max Smart Extra Battery (EFDELTA2MaxEB)

The EcoFlow DELTA 2 Max Smart Extra Battery (EFDELTA2MaxEB) is a high-capacity expansion module designed to extend the energy storage of compatible EcoFlow portable power stations. With a substantial 2048Wh capacity and advanced LiFePO4 battery chemistry, it delivers long-lasting performance, fast charging, and seamless integration with the DELTA 2 Max system. Ideal for home backup, off-grid use, and high-demand applications, it enables scalable energy storage while maintaining efficient and safe operation.

Product Features

High-Capacity Energy Expansion

Adds 2048Wh of additional storage, allowing you to double or triple total system capacity when paired with compatible EcoFlow power stations.

Long-Life LiFePO4 Battery Technology

Built with lithium iron phosphate cells rated for over 3,000 cycles to 80 percent capacity, delivering reliable performance for up to 10 years of daily use.

Seamless Plug-and-Play Integration

Connects directly to the DELTA 2 Max using a dedicated expansion cable, enabling instant setup and synchronized system operation.

Fast Dual Charging Capability

Supports rapid charging through the main unit, reaching 80 percent in approximately 81 minutes via AC or as fast as 43 minutes with combined AC and solar input.

Smart Monitoring and App Control

Provides real-time insights into battery status, power flow, and runtime through the EcoFlow app and the main unit display.

Scalable Energy System

Designed to support multiple expansion batteries, enabling flexible capacity upgrades for growing energy needs.

Advanced Battery Management System

Integrated BMS protection safeguards against over-voltage, overload, overheating, short circuits, and other electrical risks.

Compact Stackable Design

Engineered for space efficiency with a stackable form factor that integrates neatly with the main power station.

Product Specifications

• Model: EFDELTA2MaxEB
• Battery capacity: 2048Wh
• Battery chemistry: LiFePO4 (LFP)
• Cycle life: 3,000 cycles to 80 percent capacity
• Weight: Approximately 19 kg (42 lbs)
• Dimensions: 464 × 235 × 283 mm
• Input port: 51.2V, up to 2000W max
• Output port: 51.2V, up to 3200W max
• Charging method: AC, solar, or combined AC plus solar via main unit
• Charging speed: 0–80 percent in approximately 81 minutes (AC), or 43 minutes (dual AC plus solar)
• Compatibility: DELTA 2 Max, DELTA 2, DELTA Max 2000
• Operating temperature (optimal): 20°C to 30°C
• Discharge temperature: -10°C to 45°C
• Charging temperature: 0°C to 45°C
• Connectivity: EcoFlow app monitoring via main unit
• Safety system: Integrated Battery Management System (BMS) with multi-layer protection
• Expandability: Supports multiple extra batteries depending on system configuration