EcoFlow · Batteries
EcoFlow DELTA Pro Ultra Extra Battery (6144 Wh)
Works with
DELTA Pro Ultra, DELTA Pro Ultra Inverter, and Ultra X
EcoFlow DELTA Pro Ultra Extra Battery (6144 Wh): compare specifications and model compatibility. View expansion battery details, photos and support information at 326energy.
Use
What it adds
The EcoFlow DELTA Pro Ultra Extra Battery is the core 6,144 Wh energy storage module for the DELTA Pro Ultra whole-home backup platform. It is required to operate the standalone DELTA Pro Ultra Inverter (which is sold without an internal battery) and stacks up to five modules per inverter for 30,720 Wh of capacity.
Engineered with automotive-grade LiFePO4 cells, an IP54 dust- and splash-resistant enclosure, and internal self-heating films for cold-weather operation down to -20°C (-4°F), each battery locks onto the stack and connects in under a minute with the included short high-current interlock cable.
Compatibility
Product details
- Brand
- EcoFlow
- Category
- Batteries
- Compatible with
- DELTA Pro Ultra, DELTA Pro Ultra Inverter, and Ultra X
- Weight
- 111.8 lb / 50.7 kg
- Dimensions
- 26.0 × 18.0 × 8.0 in (660 × 455 × 204 mm)
- Model
- EFYJ751-BP
- Capacity
- 6,144 Wh (102.4V⎓60Ah)
- Cell chemistry
- LiFePO4 (LFP)
- Cycle life
- 3,500 cycles to 80%+ capacity
- Ingress protection
- IP54
- Operating temperature
- -20°C to 45°C (-4°F to 113°F)
- Altitude
- < 3,000 m
In action
Reference setups & real-world use
Whole-Home Garage & Smart Home Panel 2 Tower
Two 6,144 Wh EcoFlow DELTA Pro Ultra Extra Batteries (EFYJ751-BP) locked directly beneath the DELTA Pro Ultra Inverter on the wheeled trolley base for 120V/240V whole-home circuit backup.
Side Battery Port & 0.2 m High-Current Interlock Cable
Each IP54-rated 6,144 Wh LFP battery module links to the DELTA Pro Ultra Inverter above it in under a minute using the included 0.2 m Battery Connection Cable.
Highlights
Why it's worth it
- Required for the DELTA Pro Ultra Inverter, which is sold without a battery
- 6,144 Wh per module — stack up to five batteries for 30,720 Wh of whole-home backup
- LFP (LiFePO4) cells rated for 3,500+ cycles to 80% capacity, with overvoltage, overload, overtemperature, short-circuit, low-voltage and low-temperature protection
- IP54 dust/splash rating with built-in heaters for reliable operation down to -20°C (-4°F)
- Plug-and-play stacking in under a minute — no tools, no loose cables
- Pairs with EcoFlow Smart Home Panel 2 / 3 and Smart Gateway for automated whole-home backup
In the box
What's included
- EcoFlow DELTA Pro Ultra Battery (6,144 Wh)
- EcoFlow Battery Connection Cable (0.2 m / 7.9 in)
- User Manual & Safety Guide
Keep browsing
More compatible accessories
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Works with: RIVER 3 Plus
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EcoFlow RIVER Extra Battery (288 Wh)
Works with: RIVER (original)
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EcoFlow RIVER 3 Plus Extra Battery EB600 (572 Wh)
Works with: RIVER 3 Plus
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