– Start with 5kWh and expand up to 15kWh, storing more solar energy for day-to-night use.
– Plug-and-play expansion lets you stack and connect batteries to increase capacity in minutes.
– Works with your existing EcoFlow STREAM storage system, so your setup can grow as your energy needs change.
– Built for long-term reliability with LFP battery chemistry, up to 10,000 charge cycles, and durable protection for everyday use.


![DELTA Pro 3 Smart Extra Battery [Add-on]](https://astrynoms.shop/wp-content/uploads/2026/10/ecoflow-delta-pro-3-smart-extra-battery-58795204116823-scaled.png)


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