EcoFlow · Batteries
EcoFlow DELTA 2 Smart Extra Battery (1024 Wh)
Works with
DELTA 2 (also the DELTA 2 / Max ecosystem)
EcoFlow DELTA 2 Smart Extra Battery (1024 Wh): compare specifications and model compatibility. View expansion battery details, photos and support information at 326energy.
Use
What it adds
The EcoFlow DELTA 2 Smart Extra Battery adds 1,024 Wh of LiFePO4 storage to your DELTA 2 system, doubling total capacity to 2,048 Wh so refrigerators, Wi-Fi routers, lights, and kitchen appliances stay powered twice as long.
Connected through the XT150 Extra Battery cable, the module recharges and discharges in tandem with the host station—or straight from the EcoFlow Dual Fuel Smart Generator—while displaying real-time state-of-charge, input/output wattage, and remaining runtime on its front LCD screen and in the EcoFlow app.
Compatibility
Product details
- Brand
- EcoFlow
- Category
- Batteries
- Compatible with
- DELTA 2 (also the DELTA 2 / Max ecosystem)
- Weight
- 20.9 lb / 9.5 kg
- Dimensions
- 15.7 × 8.3 × 11.1 in (400 × 211 × 281 mm)
- Model
- EFD330-EB
- Capacity
- 1,024 Wh (51.2V, 20Ah)
- Cell chemistry
- LiFePO4 (LFP)
- Cycle life
- 3,000 cycles to 80%+ capacity
- Extra battery port input
- 51.2V DC, 1,024W Max
- Extra battery port output
- 51.2V DC, 1,800W Max
- Charge temperature
- 0°C to 45°C (32°F to 113°F)
- Discharge temperature
- -10°C to 45°C (14°F to 113°F)
In action
Reference setups & real-world use
2,048 Wh Kitchen & Refrigerator Backup
Paired side-by-side with EcoFlow DELTA 2 via the XT150 cable to double runtime for a full-size kitchen refrigerator and coffee maker during an outage.
Camper Utility Bay & Solar Integration
Installed alongside DELTA 2 in a compact RV bay with synchronized BMS monitoring and fast solar/AC recharging.
Highlights
Why it's worth it
- Doubles EcoFlow DELTA 2 capacity from 1,024 Wh to 2,048 Wh with long-life LiFePO4 cells
- Rated for 3,000+ full cycles to 80% capacity — roughly 10 years of regular use
- Recharges from 0–80% in about 70 minutes and 0–100% in 120 minutes when paired with DELTA 2 AC input
- Built-in internal storage compartment under the top lid keeps expansion cables and small accessories organized
- Front LCD screen and EcoFlow app integration show live battery percentage, wattage, and time remaining
- Supports direct DC fast-charging from the EcoFlow Smart Generator via the XT150 port
In the box
What's included
- EcoFlow DELTA 2 Smart Extra Battery (1,024 Wh)
- DELTA 2 Extra Battery Cable (XT150)
- User Manual
Keep browsing
More compatible accessories
EcoFlow RIVER 3 Plus Extra Battery EB300 (286 Wh)
Works with: RIVER 3 Plus
Adds 286 Wh of LiFePO4 capacity to the RIVER 3 Plus (572 Wh total) via cable-free Pogo Pin stacking. Rated for 3,000+ cycles to 80% capacity and includes a 140W bidirectional USB-C port for standalone charging and device power.
EcoFlow RIVER Extra Battery (288 Wh)
Works with: RIVER (original)
Doubles the original EcoFlow RIVER capacity from 288 Wh to 576 Wh. Bolts directly to the underside of the first-generation RIVER chassis with the included hardware for a single-handle, cable-free setup.
EcoFlow RIVER 3 Plus Extra Battery EB600 (572 Wh)
Works with: RIVER 3 Plus
Adds 572 Wh of LiFePO4 capacity to the RIVER 3 Plus, tripling total system storage to 858 Wh. Clips beneath the station via wireless Pogo Pin contacts and features a built-in 140W bidirectional USB-C port for standalone use.