Take your power system to the next level with the EcoFlow DELTA Pro Extra Smart Battery, a modular energy storage solution designed to expand the capacity of your existing EcoFlow DELTA Pro Portable Power Station. Whether you're looking to extend your backup time during outages, power larger appliances, or build a scalable off-grid solar setup, this expansion battery adds serious energy storage with maximum flexibility.
Each DELTA Pro Extra Battery adds an impressive 3,600Wh (3.6kWh) of capacity to your DELTA Pro system. You can connect up to two extra batteries per DELTA Pro, increasing your total storage to 10.8kWh per unit and even more with parallel setups.
Battery Capacity: 3,600Wh (3.6kWh)
Battery Chemistry: LiFePO₄ (Lithium Iron Phosphate)
Cycle Life: 3,500+ cycles to 80% capacity
Dimensions: 25 × 11.2 × 10.2 in (approx.)
Weight: ~84 lbs
Connectivity: Smart cable connection with automatic sync
Charging Methods: Charges directly from the DELTA Pro or via solar, AC, or car input when used with the EcoFlow Smart Generator or Smart Home Panel
App Control: Monitor and manage from the EcoFlow app via Bluetooth or Wi-Fi
The DELTA Pro Extra Battery connects to the main unit with EcoFlow’s smart expansion port, enabling automatic balancing and coordinated charge/discharge. The system functions as one cohesive unit - no manual controls or extra programming needed.
This plug-and-play design makes the Extra Smart Battery ideal for:
Homeowners building a whole-home backup system
Solar users needing more daily storage
Off-grid cabins or tiny homes
Emergency prep and long-term blackouts
You can even integrate the DELTA Pro and Extra Battery into the EcoFlow Smart Home Panel, enabling automatic switchover when the grid goes down.
The Extra Battery is fully compatible with EcoFlow’s solar panels and third-party PV arrays (via MPPT controllers), making it an excellent choice for off-grid applications. It supports solar charging alongside the DELTA Pro, so you can recharge your entire setup from the sun and stay powered for days.
With the full EcoFlow ecosystem, DELTA Pro + Extra Battery + Smart Generator + Solar + Smart Home Panel, you can create a flexible and intelligent energy system tailored to your home or mobile power needs.
As your energy needs grow, so can your EcoFlow system. Add one or two Extra Smart Batteries to each DELTA Pro, or scale even further with the Double Voltage Hub, which enables 240V split-phase output for large appliances like dryers, pumps, and HVAC systems.
For RVs, boats, or remote living, this kind of modular expansion allows you to travel lighter or build bigger without being locked into fixed, expensive setups.
Expandable 3.6kWh capacity per unit
Ultra-safe, long-lasting LiFePO₄ cells
Seamless integration with EcoFlow DELTA Pro systems
Compatible with solar, AC, and generator charging
App-enabled control for real-time battery management
Perfect for home, RV, solar, and mobile energy systems
With the EcoFlow DELTA Pro Extra Smart Battery, you don’t have to settle for fixed capacity. Whether you're preparing for emergencies, living off-grid, or maximizing solar savings, this expansion battery gives you the storage and flexibility you need today and tomorrow.
Shop now to expand your system or contact us for help designing the ideal setup for your energy goals.
