EcoFlow DELTA 3 Max Plus (2048Wh) Smart Extra Battery

2048Wh Capacity | Automotive-Grade LiFePO₄ Battery | Plug-and-Play Expansion | Up to 6144Wh Total Capacity | 5-Year Warranty

The EcoFlow DELTA 3 Max Plus (2048Wh) Smart Extra Battery is designed to significantly expand the energy storage of compatible EcoFlow power stations. With an additional 2048Wh of capacity, this Smart Extra Battery gives you more runtime for home backup, RV travel, camping, outdoor adventures, and everyday power needs. It uses automotive-grade full-tab LiFePO₄ battery cells for improved efficiency, heat management, safety, and long-term durability. The plug-and-play design makes expansion simple, while the EcoFlow App lets you monitor battery level, operating status, and temperature.

Add 2048Wh of Extra Energy Storage

The Smart Extra Battery adds a full 2048Wh of additional energy capacity to compatible EcoFlow systems. When paired with the DELTA 3 Max Plus, the system can reach 4096Wh with one extra battery, providing substantially longer runtime for appliances, electronics, and other essential equipment.

Expand Up to 6144Wh

For users who need even more energy storage, the DELTA 3 Max Plus can support up to two 2048Wh Smart Extra Batteries when used with the compatible EcoFlow Smart Extra Battery Expansion Adapter. This allows the DELTA 3 Max Plus system to reach up to 6144Wh of total capacity.

Power for Longer During Outages

Additional battery capacity means more runtime between charging sessions. Use the expanded DELTA 3 Max Plus system to keep essential equipment operating during extended power outages, including refrigerators, networking equipment, lighting, computers, televisions, and other compatible devices.

The additional capacity is also useful for RV trips, camping, outdoor work, remote locations, and emergency preparedness, where access to conventional electricity may be limited.

Plug-and-Play Expansion

Adding the Smart Extra Battery is simple. Connect it to the compatible power station using the included Smart Extra Battery Cable, and the system recognizes the additional battery without complicated setup. EcoFlow describes the design as plug-and-play, making it easy to increase your available energy storage when your power requirements grow.

Automotive-Grade Full-Tab LiFePO₄ Cells

The battery uses automotive-grade full-tab LFP (LiFePO₄) cells. The full-tab design is engineered to reduce internal resistance, improve efficiency, enhance safety, and reduce heat generation while providing high energy capacity. This makes the battery well suited for demanding, repeated-use applications.

Smart Monitoring with the EcoFlow App

Stay informed about your expanded energy system through the EcoFlow App. You can monitor important information such as battery charge level, operating status, and temperature, helping you keep track of available energy and system performance from your mobile device.

Compact Design for Easier Storage

Although it adds 2048Wh of capacity, the Smart Extra Battery has been redesigned to use approximately 25% less overall volume than the DELTA 2 Max Smart Extra Battery. Its more compact design makes it easier to store, transport, and stack with compatible EcoFlow equipment. 

Stackable for Flexible Energy Storage

The Smart Extra Battery is designed to integrate neatly with compatible EcoFlow power stations, creating a more organized energy storage setup. Its stackable design is particularly useful for home backup systems, indoor storage, RVs, and other applications where space matters.

Designed for Extended Home Backup

When connected to a DELTA 3 Max Plus, the additional 2048Wh provides a larger energy reserve for emergency situations. This can help extend the operating time of essential household equipment when grid power is unavailable, reducing the need for frequent recharging.

Compatible with EcoFlow's Expanding Ecosystem

The Smart Extra Battery is designed primarily for the EcoFlow DELTA 3 Max Plus (2048Wh) and DELTA 3 Ultra Plus (3072Wh). EcoFlow also lists additional ecosystem compatibility, including certain future firmware-supported products. Compatibility should be checked for the specific power station and firmware version before connecting accessories.

Built-In Battery Protection

The battery incorporates multiple protection systems designed to safeguard the unit during charging, discharging, and everyday operation. Protection includes over-voltage, overload, over-temperature, short-circuit, low-temperature, low-voltage, and overcurrent protection.

Designed for Long-Term Energy Storage

The combination of LiFePO₄ chemistry, automotive-grade full-tab cells, intelligent battery management, and multiple protection systems makes the Smart Extra Battery a dependable long-term expansion solution. It is designed to provide additional energy storage without requiring you to purchase another complete portable power station.

A Smart Upgrade for Your DELTA 3 Max Plus

If your existing DELTA 3 Max Plus doesn't provide enough runtime, the EcoFlow DELTA 3 Max Plus Smart Extra Battery provides a straightforward way to add another 2048Wh of energy storage. With plug-and-play installation, app monitoring, compact construction, automotive-grade LFP cells, and the ability to expand the system to 6144Wh, it is an ideal upgrade for extended home backup, RVing, outdoor adventures, and emergency power.

What's Included

• 1 × EcoFlow DELTA 3 Max Plus (2048Wh) Smart Extra Battery
• 1 × Smart Extra Battery Cable
• 1 × Manuals & Warranty Card

EcoFlow's product information lists the Smart Extra Battery, Extra Battery Cable, and Manuals & Warranty Card in the package.

Technical Specifications

• Rated Capacity: 2048Wh (51.2V / 40Ah)
• Battery Chemistry: LiFePO₄ (LFP)
• Net Weight: Approx. 16kg (35.3 lbs)
• Dimensions: Approx. 494 × 239 × 196mm
• Extra Battery Output: 43.2–57.6V, 100A max
• Extra Battery Input: 43.2–57.6V, 48A max
• Charge Temperature: 0°C–45°C
• Discharge Temperature: -10°C–45°C
• Storage Temperature: -10°C–45°C

5-Year Warranty

The EcoFlow DELTA 3 Max Plus Smart Extra Battery is backed by a 5-year warranty, consisting of a 3-year standard warranty plus an additional 2-year extended warranty available after EcoFlow App registration. This provides added peace of mind for a long-term home backup and portable energy investment.