EcoFlow DELTA Pro Ultra Extra Battery 6kWh (6144Wh)

The EcoFlow DELTA Pro Ultra Extra Battery is an expansion battery for anyone who wants to add more storage capacity to the EcoFlow DELTA Pro Ultra system. This module adds 6 kWh (6,144 Wh) of extra energy storage per battery and is designed for home backup power, solar energy storage, and situations where you want to stay independent from the grid for longer. Important: this is not a standalone power station. The battery works only in combination with the EcoFlow DELTA Pro Ultra inverter.

Description

With the EcoFlow DELTA Pro Ultra Extra Battery you can expand your DELTA Pro Ultra setup in a scalable way. For example, you start with a base configuration and add extra battery modules later when your energy usage grows or when you want longer backup runtimes. This makes the solution attractive for households with solar panels that want to increase self-consumption, for anyone looking for a reliable home backup solution, and for users who want to handle peak consumption or electricity price peaks more efficiently with additional storage.

The battery is built with LiFePO4 (LFP) cells. This chemistry is known for high safety, stable performance, and a long service life. In practice, this means the battery is designed for years of daily use, maintaining capacity over many charge cycles. The EcoFlow DELTA Pro Ultra Extra Battery is also modular and stackable: you increase total storage with each additional module, without having to replace the entire system. From an SEO perspective, this product aligns well with searches such as EcoFlow DELTA Pro Ultra extra battery, 6kWh expansion battery, home battery expansion, home energy storage, backup power home battery, LiFePO4 battery module, and modular energy storage system.

Because this battery is part of a larger platform, the main strength is flexibility: you decide how much storage you need and you scale up when the time is right. In combination with the DELTA Pro Ultra inverter and the EcoFlow app, the system can be used for backup during outages, maximizing the use of solar energy, and planning charge/discharge based on your situation. This makes it a future-ready expansion for anyone who wants to take energy independence and reliable power seriously.

Why this solution is interesting

• 6 kWh (6,144 Wh) of extra storage per module for longer backup runtimes
• LiFePO4 (LFP) battery technology for high safety and long lifespan
• Designed for many charge cycles (3,500 cycles to 80% capacity is commonly listed by retailers)
• Modular and stackable: expand as your energy needs grow
• Works within the DELTA Pro Ultra ecosystem and is managed via the EcoFlow app (through the inverter)
• IP54 dust and splash resistance when ports are properly closed
• Self-heating at low temperatures (adjustable in the app, depending on system settings)

Applications

• Home backup power: longer runtime during power outages (with the DELTA Pro Ultra inverter)
• Solar energy storage: higher self-consumption and less exporting to the grid
• Smart energy management: charge when electricity is cheaper and use when consumption or tariffs are higher
• Off-grid or semi off-grid use: more autonomy in locations with limited grid reliability
• Business use: extra energy buffer for office, workshop, or critical equipment (depending on system configuration)

Home energy storagePortable power stationsValue bundles

Technical specifications

The specifications below have been checked using manufacturer information and multiple reliable retailers. In some cases, small differences are mentioned (for example weight or EAN per market version). For core data such as compatibility and EAN, the manufacturer is used as the primary reference.

Dimensions and weight

• Dimensions: 660 × 455 × 204 mm (66 × 45.5 × 20.4 cm)
• Weight: approx. 50.7 kg (some sources list approx. 52.7 kg, possibly including packaging or a variant)

Functionality and performance

• Battery capacity: 6,144 Wh (6 kWh)
• Cell chemistry: LiFePO4 (LFP)
• Cycle life: often specified as 3,500 cycles to 80% capacity (retailer specifications)
• Nominal battery data (retailer specifications): 102.4 V ~ 60 A
• Dust and water resistance: IP54 when ports are closed
• Self-heating: starts automatically below 0 °C (adjustable in the app, depending on system settings)

Compatibility and connectivity

• Compatibility: only for use with the EcoFlow DELTA Pro Ultra inverter
• Not compatible with: EcoFlow DELTA Pro, DELTA Pro 3, and other EcoFlow models (as stated by multiple retailers)
• Expandability: stackable up to a maximum of 5 batteries within the DELTA Pro Ultra system (up to 30 kWh total, depending on configuration)
• Monitoring and settings: via the EcoFlow app (control is handled through the inverter)

What’s in the box

• EcoFlow DELTA Pro Ultra Extra Battery (6 kWh module)
• Battery connection cable (approx. 20 cm, type may vary by batch/shipment)
• Documentation or safety guide (contents may vary by shipment)

Warranty and operating temperatures

• Warranty: 5 years (commonly stated by retailers)
• Discharging: -10 °C to 45 °C
• Charging: 0 °C to 45 °C
• Storage: -20 °C to 45 °C
• Self-heating: can automatically activate below 0 °C (adjustable in the app, depending on system settings)

EAN codes

• EAN (manufacturer + multiple EU retailers): 4895251611725
• Note: some retailers also display an additional EAN for a (market) variant or listing. Always verify the barcode on the packaging/product label upon receipt. For this product page, the EcoFlow EAN is used as the primary reference.

FAQ

Can I use this extra battery on its own or charge it separately?

No. This battery module is intended as an expansion and works only in combination with the EcoFlow DELTA Pro Ultra inverter. Without the inverter, you cannot use it as a standalone power station.

Which EcoFlow systems is this compatible with?

This module is specifically designed for the EcoFlow DELTA Pro Ultra inverter. Multiple retailers explicitly state that it does not work with the DELTA Pro or DELTA Pro 3. Always choose the battery that matches your exact EcoFlow platform.

How many batteries can I stack in one system?

Within the DELTA Pro Ultra system, a maximum of 5 battery modules is commonly mentioned, delivering up to 30 kWh total storage. The exact possibilities depend on your inverter configuration.

Is the battery suitable for lower temperatures?

The specified charge and discharge temperature ranges suit many European conditions. In addition, the documentation mentions that the battery can automatically enable self-heating below 0 °C. This can typically be managed in the app (depending on system settings).

Is this a good choice if I mainly want longer backup time?

Yes. If you already have a DELTA Pro Ultra base setup, adding storage is the most direct way to extend backup runtime. You increase total available kWh, so essential devices can keep running longer during outages, depending on your consumption and system settings.

Videos

The videos below show the EcoFlow DELTA Pro Ultra platform in real use (inverter + battery modules), including explanations, experiences, and practical scenarios. This helps you understand how adding extra battery modules can increase your total energy storage.