EcoFlow · Batteries
EcoFlow DELTA Pro Smart Extra Battery (3600 Wh)
$1,348.99Works with
DELTA Pro / DELTA Pro 3 (via cable)
Adds 3,600 Wh of LiFePO4 storage per unit — connect up to two modules to a DELTA Pro for 10,800 Wh, or pair with DELTA Pro 3 via adapter cable. Built-in wheels, telescoping handle, front LCD screen, and expansion cable included.
Use
What it adds
The EcoFlow DELTA Pro Smart Extra Battery adds 3,600 Wh of heavy-duty LiFePO4 storage per unit. Connect up to two modules to a DELTA Pro for 10,800 Wh of backup energy, or link it to a DELTA Pro 3 via the compatible extra battery cable.
Built on a wheeled suitcase chassis with a telescoping pull handle and a full front LCD readout, the battery charges in sync with the host station from AC, solar, EV stations, or Smart Home Panel, and also supports direct DC input from the EcoFlow Smart Generator.
Compatibility
Product details
- Brand
- EcoFlow
- Category
- Batteries
- Compatible with
- DELTA Pro / DELTA Pro 3 (via cable)
- Weight
- 83.8 lb / 38 kg
- Dimensions
- 25.0 × 11.2 × 16.4 in (635 × 285 × 416 mm)
- Model
- EFD500-EB
- Capacity
- 3,600 Wh (48V, 75Ah)
- Cell chemistry
- LiFePO4 (LFP)
- Cycle life
- 6,500 cycles to 50% / 3,500 cycles to 80% capacity
- Extra battery port
- 48V DC, 3,200W Max Charge / 4,260W Max Discharge
- Transport design
- Integrated rear wheels + telescoping pull handle
- 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
7.2–10.8 kWh Home Transfer Switch Backup
Wheeled 3,600 Wh LFP expansion battery paired beside EcoFlow DELTA Pro at a residential transfer panel for multi-day circuit backup.
30A RV Shore Power & Jobsite Setup
Rolls into position on built-in wheels to double DELTA Pro capacity for high-draw power tools and RV air conditioning.
Highlights
Why it's worth it
- Adds 3,600 Wh per unit — expand a single DELTA Pro to 7,200 Wh or 10,800 Wh with two batteries
- Also compatible with EcoFlow DELTA Pro 3 when connected via the DELTA Pro 3 Extra Battery Cable
- Heavy-duty LiFePO4 chemistry rated for 6,500 cycles to 50% capacity (3,500 cycles to 80%)
- Built-in wheels and telescoping luggage handle make moving the 83.8 lb (38 kg) module effortless
- Direct 1,800W DC charging port for the EcoFlow Dual Fuel Smart Generator even without the main station
- Full front LCD display and EcoFlow app integration for cell health, input/output, and charge limits
In the box
What's included
- EcoFlow DELTA Pro Smart Extra Battery (3,600 Wh)
- DELTA Pro Extra Battery Cable
- Handle Cover
- 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 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.