EcoFlow DELTA Pro 3 Smart Extra Battery – 4,096 Wh LiFePO₄ Capacity Expansion for Home Backup & Off‑Grid Power

Boost Your Backup — Add 4 kWh Extra Power in Seconds

Supercharge your EcoFlow DELTA Pro 3 system with the Smart Extra Battery — a modular, plug-and-play upgrade that instantly expands your energy capacity by 4,096 Wh. With room to scale, stack up to three for a total of 12 kWh of LiFePO₄ battery power, perfect for families, full-time RVers, and homeowners who prepare for anything.

✅ 4,096 Wh LiFePO₄ Capacity — Add a full day's worth of power for fridges, lights, medical gear, CPAPs, HVAC systems, and more. 
✅ Stackable Design Up to 12 kWh — Seamlessly cable multiple modules for extended runtime during prolonged outages. 
✅ Built for the Long Haul — 4,000+ life cycles to 80% capacity (~11 years of use) with safe and reliable LiFePO₄ battery chemistry. 
✅ Plug-and-Play Setup — Snap on top of your DELTA Pro 3 and instantly boost capacity — no tech needed. 
✅ Quiet & Compact — Sleek, stackable form adds bulk-free backup power without sacrificing space. 
✅ Integrated into Home Power Systems — Compatible with EcoFlow Smart Home Panel 2 and full-home UPS setups.

🔗 Why Dead End Survival Recommends It

This module turns your DELTA Pro 3 from a powerful backup generator into a true home-scale battery system. It’s the perfect way to offer upsells and bundles in your store — giving customers peace of mind that they’re ready for multi-day outages, off-grid hatch living, or even small DIY solar setups.

🛒 Start Expandable Power Today

Upgrade your DELTA Pro 3 with the Smart Extra Battery and get reliable, long-lasting energy delivered fast from Dead End Survival — your trusted source for high-performance power gear.

An Intelligent Subpanel For Outage
Protection And Savings In One

The EcoFlow Smart Home Panel 2 is the center of your whole-home backup solution,
working alongside EcoFlow DELTA Pro 3, generators, and solar panels to protect your
thome. With a fast, automatic switchover, you'll have reliablebackup whenever needed. It
allows you to customize your energy usage based on time-off-use rates and your home's
solar energy production.

Plug and Play

The smart extra batteries are easy to connect with the main unit of EcoFlow DELTA Pro 3. Enjoy a seamless, plug-and-play setup. The compact and portable design adds convenience to your power management.

Explore the Secure Feeling EcoFlow Brings to You

Built with state-of-the-art automotive-grade LFP cells for safe and reliable service. Our strong 5-year warranty ensures peace of mind.

Energize Every Moment That Needs Electricity

Power almost all your essential home appliances with the robust 4000W and dual 120V/240V capabilities of a single unit. Add extra batteries to extend the convenience even further.

Off-grid

RV

Jobsite

Cutting-Edge Design, Sleek and Striking

Boosts portability with wider wheels, ergonomic handle, and a compact design. Perfect for dynamic lifestyles and maximizing family space.

Effortless All-in-One Command With the EcoFlow App

Control and monitor your home's power remotely with ease using the EcoFlow app. Track every watt and customize your power usage for optimal efficiency.

What's in the box