EcoFlow DELTA 3 Max Plus Smart Extra Battery front view
EcoFlow DELTA 3 Max Plus Smart Extra Battery angled view
EcoFlow DELTA 3 Max Plus Smart Extra Battery side view
DELTA 3 Max Plus Extra Battery

EcoFlow DELTA 3 Max Plus Smart Extra Battery

Extend DELTA 3 Max-family runtime with a dedicated EcoFlow smart extra battery.

  • Designed for DELTA 3 Max Plus-family expansion
  • Smart extra battery integration
  • Useful extra runtime for backup and off-grid setups
  • Pairs with compatible EcoFlow DELTA 3 Max Plus systems
  • Expansion battery, not a standalone AC power station

Use with a compatible main unit. Compatibility should be checked before ordering.

£799.00

Out of stock

UK-Based BusinessManufacturer WarrantyFlexible Ways to PayUK Customer Support
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Quick fit check

Is this expansion battery right for you?

Good fit if:

  • You already own a compatible EcoFlow main unit.
  • You want to extend runtime for longer outages or trips.
  • You have checked the connector and model compatibility.

Not ideal if:

  • You need a standalone power station.
  • You have not confirmed compatibility with your existing setup.
  • You want built-in AC sockets directly on the battery.
At a glance

DELTA 3 Max Plus Extra Battery at a Glance

WarrantyTo verify
Battery TypeLFP
A closer look

A Closer Look at the DELTA 3 Max Plus Extra Battery

This is a platform accessory and should be sold only with a clear compatibility check against the customer host unit and any required adapter.

EcoFlow DELTA 3 Max Plus Smart Extra Battery side view
VoltReady confidence

Why Buy From VoltReady™

UK-Based Business

VoltReady is a UK-based portable-power specialist serving customers across the United Kingdom.

Manufacturer Warranty

Products include manufacturer-backed warranty cover, with the exact terms shown clearly on each product page.

Flexible Ways to Pay

Pay securely by card, Apple Pay, Google Pay, Klarna or Clearpay. Available options depend on your order and eligibility.

UK Customer Support

Get straightforward help before and after your purchase through live chat or email.

Product details

Everything important, clearly organised

Key Features
Designed for DELTA 3 Max Plus-family expansion
Smart extra battery integration
Useful extra runtime for backup and off-grid setups
Pairs with compatible EcoFlow DELTA 3 Max Plus systems
Expansion battery, not a standalone AC power station
Technical Specifications
ModelDELTA 3 Max Plus Smart Extra Battery
Battery ChemistryLFP
Host CompatibilityEcoFlow DELTA 3 Max Plus-family systems
Product Typesmart extra battery
Use Casecapacity expansion for compatible host units
What’s in the Box
EcoFlow DELTA 3 Max Plus Smart Extra Battery
Connection cable/accessory set where supplied
User documentation
FAQs

Is this a standalone power station?

No. It is an expansion battery for compatible EcoFlow systems, not a standalone AC power station.

Which host should it be paired with?

Use it only with compatible DELTA 3 Max Plus-family host units and check EcoFlow guidance before sale.

Why choose an extra battery?

It extends runtime for customers who already have a compatible host power station.

Shipping, Returns & Warranty
Free UK delivery available on qualifying orders.
30-day returns policy for eligible unused items.
Manufacturer warranty applies where verified and is subject to the manufacturer terms.
Delivery times, courier limits, mainland/remote-area handling and heavy-item carriage must be reconfirmed before relaunch activation.
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