Add 1,024Wh of battery storage to your EcoFlow DELTA 2 for longer runtime between charges.
EcoFlow DELTA 2 Smart Extra Battery
Need more runtime from your existing DELTA 2? The EcoFlow DELTA 2 Smart Extra Battery adds energy storage without replacing your power station.
Connect it to a standard 1,024Wh DELTA 2 to increase total nominal capacity to 2,048Wh. It is a practical upgrade when your power station already handles your appliances but you want longer between charging opportunities.
1,024Wh Extra Storage
LFP Battery
Connection Cable Included
Longer Runtime
Extra battery only: This is not a standalone power station. Appliances connect to your compatible power station, not directly to this battery. Adding storage does not increase the power station’s continuous AC output.
Extend Your Runtime
Store more energy for the equipment you already use. Actual runtime depends on appliance consumption, battery condition and operating conditions.
Simple Expansion
Connect the battery using the supplied extra-battery cable, following EcoFlow’s instructions. No fixed electrical installation is needed for this connection.
Shared Charging
Charge the connected system through your power station’s supported inputs. Mains and solar charging are handled by the power station.
Build on What You Own
Add storage to a compatible setup rather than purchasing another complete power station. Check your exact model before ordering.
🔧 What’s Included
- 1 × EcoFlow DELTA 2 Smart Extra Battery
- 1 × DELTA 2 Extra Battery Cable
Power station, solar panels and other accessories are not included.
🔌 Compatibility
Designed for capacity expansion of the EcoFlow DELTA 2. EcoFlow also lists support for the DELTA 2 Extra Battery on selected DELTA 3 Series models, including the DELTA 3 Plus.
Compatibility is model-specific—not every DELTA Series power station accepts this battery. Contact us before ordering for a model other than the DELTA 2 so we can confirm the connection and any firmware requirements.
Check the battery name: The DELTA 2 Smart Extra Battery is a 1,024Wh model. The DELTA 2 Max Smart Extra Battery is a different, larger product.
🔋 DELTA 2 Capacity Expansion
| Configuration |
Total Nominal Capacity |
| Standard DELTA 2 alone |
1,024Wh |
| Standard DELTA 2 + DELTA 2 Smart Extra Battery |
2,048Wh |
These totals apply to the standard 1,024Wh DELTA 2. Other power station variants may have a different starting capacity. Nominal battery capacity is not the same as usable AC energy delivered to appliances.
⚡ Charging & Everyday Use
Connect the extra battery to your power station before charging through mains or solar. Follow the connection sequence and operating instructions in the EcoFlow manual.
More battery capacity takes longer to replenish at the same charging power. Allow for your daily energy use and available charging opportunities when planning a touring or backup setup.
Keep the battery dry, allow suitable ventilation and follow the manual’s storage and maintenance guidance.
📊 Technical Specifications
| Product |
EcoFlow DELTA 2 Smart Extra Battery |
| Nominal capacity |
1,024Wh |
| Battery chemistry |
LFP (LiFePO₄) |
| Rated cycle life |
3,000 cycles to at least 80% capacity under specified test conditions |
| Weight |
Approximately 9.5kg |
| Dimensions |
400 × 211 × 281mm |
| Charging temperature |
0°C to 45°C |
| Discharging temperature |
−10°C to 45°C |
| Standalone AC outlets |
None |
Frequently Asked Questions
Can I use this battery on its own?
No. It adds storage to a compatible power station. It does not have household AC outlets for directly powering appliances.
Does it increase the wattage of my DELTA 2?
No. It increases stored energy and runtime, not continuous AC output. Appliance loads must remain within your power station’s limits.
Can I plug solar panels directly into it?
No. Connect solar panels to the compatible power station using its supported solar input. The connected system then manages charging.
Is the connection cable included?
Yes. A DELTA 2 Extra Battery Cable is included.
Will it work with my DELTA 3 Series power station?
Selected models support this battery, but compatibility is not universal. Contact us with your exact model before ordering.
Does the cycle-life rating guarantee ten years of use?
No. Cycle life is a laboratory-based performance rating, not a fixed lifespan or warranty period. Temperature, charging habits, storage and usage affect battery ageing.
Not sure which extra battery you need?
Contact us with your exact EcoFlow model and we’ll help check the right option.
