Match the main unit
Check the exact host model and connection before choosing an extra battery.
EcoFlow DELTA 3 Max Plus Smart Extra Battery (2048Wh)
$849.00
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AUTHORIZED ECOFLOW RESELLER
EcoFlow DELTA 3 Max Plus Extra Battery
Add energy to your compatible Plus system.
$849.00
2048WhAdditional capacity
LFPBattery chemistry
PlusCheck exact host
AppConnected monitoring
EXTRA 5% OFF APPLIED AT CHECKOUT
Extra battery only. Main unit and optional expansion adapter sold separately.
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
Up to 5-year warranty
3-year standard warranty + 2-year extension with EcoFlow App registration. Terms apply.CHOOSE IT FOR YOUR PLANS.
Add energy to your compatible Plus system.
The EcoFlow DELTA 3 Max Plus Smart Extra Battery adds energy storage to a compatible main power station. It is a capacity upgrade for users who want selected loads to run longer without replacing their existing station.
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.
Match the host, cable and firmware.
This battery adds storage to a supported system. A two-battery configuration requires the appropriate EcoFlow Smart Extra Battery Expansion Adapter. Confirm firmware and connection requirements before purchase.
Extra battery only. Main unit and optional expansion adapter sold separately.
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
- 2048Wh
- Battery chemistry
- Lithium iron phosphate (LFP)
- Designed hosts
- DELTA 3 Max Plus / DELTA 3 Ultra Plus
- Two-battery setup
- Requires compatible expansion adapter
- Standalone operation
- Requires compatible main unit
- Manufacturer warranty
- Up to 5-year 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?
Up to 5-year warranty. 3-year standard warranty + 2-year extension with EcoFlow App registration. Terms apply.
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 Max Plus Extra Battery 2048Wh: extend a compatible delta system's stored energy
The EcoFlow DELTA 3 Max Plus Smart Extra Battery adds energy storage to a compatible main power station. It is a capacity upgrade for users who want selected loads to run longer without replacing their existing station.
Key specifications and configuration
- Additional battery capacity: 2048Wh.
- Battery chemistry: lithium iron phosphate (LFP).
- Designed for DELTA 3 Max Plus and DELTA 3 Ultra Plus.
- EcoFlow app monitoring through the connected system.
Check your host model first
This is an expansion battery, not a standalone AC power station. More watt-hours can extend runtime, but do not increase the main station's rated output. Confirm the exact host model, firmware and required connection accessories before ordering; a similar DELTA name does not establish compatibility.
Connecting two extra batteries requires the appropriate EcoFlow Smart Extra Battery Expansion Adapter. Confirm compatibility with the configuration you intend to use. You can also browse currently listed DELTA stations.
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.