Match the main unit
Check the exact host model and connection before choosing an extra battery.
EcoFlow DELTA 3 Series Smart Extra Battery (1024Wh)
$399.00
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AUTHORIZED ECOFLOW RESELLER
EcoFlow DELTA 3 Series Extra Battery
Longer runtime for a compatible DELTA 3.
$399.00
1024WhAdditional capacity
LFPBattery chemistry
DELTA 3Compatible host family
AppConnected monitoring
EXTRA 5% OFF APPLIED AT CHECKOUT
Extra battery only. Confirm host compatibility before ordering.
Free shipping · Contiguous 48 U.S. statesEstimated delivery: 5–8 business days1–3 business days processing + approximately 4–5 in transit.
Genuine EcoFlow · Direct U.S. warehouse fulfillment
5-year manufacturer warranty
Coverage is subject to EcoFlow’s U.S. warranty terms.CHOOSE IT FOR YOUR PLANS.
Longer runtime for a compatible DELTA 3.
The EcoFlow DELTA 3 Series Smart Extra Battery adds 1024Wh to a compatible DELTA 3 or DELTA 3 Plus power station. Consider it when the station's output already suits your devices but you want a larger energy reserve.
Add stored energy
A larger reserve can extend runtime without changing the host’s output rating.
Plan the connection
Check cables, supported battery count and firmware requirements.
KNOW YOUR CONFIGURATION.
Keep the output. Extend the reserve.
When your station already suits your appliances, extra storage can extend the time available. Confirm the host and connection requirements; compatibility should not be assumed for DELTA 3 Classic.
Extra battery only. Confirm host compatibility before ordering.
KNOW YOUR CONFIGURATION.
The details, in one place.
Specifications refer to the model and configuration described. Actual performance depends on operating conditions. Optional equipment is sold separately unless expressly included.
- Additional capacity
- 1024Wh
- Battery chemistry
- Lithium iron phosphate (LFP)
- Designed for
- DELTA 3 and DELTA 3 Plus
- Monitoring
- Via compatible connected system
- Standalone AC outlets
- Not included
- Manufacturer warranty
- 5-year manufacturer warranty
Before you order
- Confirm the exact host and battery model.
- Check required cable, adapter and firmware.
- Select the intended variant and review its availability.
BUY WITH CLARITY.
Good questions. Clear answers.
Is a main power station included?
No. This listing is for the extra battery only. The compatible main station is sold separately.
Does adding capacity increase AC output?
No. More watt-hours can extend runtime, but the main unit’s rated output and port limits still apply.
Can I choose by the DELTA or RIVER name alone?
No. Confirm the exact main unit, battery model, connection cable and any firmware requirements.
Can this replace a standalone AC power station?
No. The compatible host supplies the AC outlets. Check any separate DC or USB capabilities before use.
When will my order arrive?
Allow 1–3 business days for processing and approximately 4–5 business days in transit for available items. Delivery times are estimates. Check the selected option’s availability before ordering.
Shipping & delivery ↗What warranty applies?
5-year manufacturer warranty. Coverage is subject to EcoFlow’s U.S. warranty terms.
EcoFlow warranty terms ↗What is the return policy?
Review NOVANEST’s current Returns & Refunds Policy for eligibility, timing and return-shipping details. Contact us for help with an order.
Returns & Refunds Policy ↗Full product description
EcoFlow DELTA 3 Extra Battery 1024Wh: more energy storage for delta 3 and delta 3 plus
The EcoFlow DELTA 3 Series Smart Extra Battery adds 1024Wh to a compatible DELTA 3 or DELTA 3 Plus power station. Consider it when the station's output already suits your devices but you want a larger energy reserve.
Key specifications and configuration
- Additional capacity: 1024Wh.
- Designed for EcoFlow DELTA 3 and DELTA 3 Plus.
- LFP battery chemistry.
- Connected-system monitoring in the EcoFlow app; 5-year manufacturer warranty, subject to terms.
Confirm expansion compatibility
This listing is for the extra battery, not the main power station. It expands stored energy rather than the host's output rating. Confirm the host model and connection requirements before ordering. Compatibility should not be assumed for DELTA 3 Classic or other similarly named units.
Pair it with the EcoFlow DELTA 3. Confirm compatibility with the current model and intended setup before ordering. Actual runtime depends on the load and operating conditions.
The right power starts with your needs.
Tell us what you want to run and for how long. We’ll help you narrow it down.