• EcoFlow DELTA 2 Max Smart Extra Battery Front View
  • EcoFlow DELTA 2 Max Smart Extra Battery Front And Right View
  • EcoFlow DELTA 2 Max Smart Extra Battery Left, Top And Front View
  • EcoFlow DELTA 2 Max Smart Extra Battery Side View
  • EcoFlow DELTA 2 Max With 1 Smart Extra Battery
  • EcoFlow DELTA 2 Max With 2 Smart Extra Batteries
  • EcoFlow DELTA 2 Max With 2 Smart Extra Batteries
  • EcoFlow DELTA 2 Max Smart 2Extra Battery
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EcoFlow DELTA 2 Max Smart Extra Battery

EcoFlow

$699.00
$699.00
In Stock — Ready to Ship
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Product Details

The DELTA 2 Max Smart Extra Battery doubles the DELTA 2 Max's storage from 2048Wh to 4096Wh — enough for 24+ hours of home essential backup or a full multi-day off-grid trip without recharging. It also expands the base DELTA 2 when paired together, pushing that system to 3072Wh from its 1024Wh starting point.

The 4,000-cycle LFP chemistry matches the DELTA 2 Max's own battery specification, ensuring the combined system maintains consistent performance over years of regular use. At 4096Wh, the system powers a full-size refrigerator for over 35 hours, runs a CPAP machine for 5+ nights, or keeps a home office (laptop, monitor, router, lights) going for 2+ days. Connection via the expansion port takes seconds — no tools, cables, or configuration required.

Brand new in box

Brand new in box

5 year factory warranty

5 year factory warranty

Fast shipping (5–7 business days)

Fast shipping (5–7 business days)

Authorized EcoFlow dealer

Authorized EcoFlow dealer
  • Doubles DELTA 2 Max capacity from 2048Wh to 4096Wh — 24+ hours of home essential backup
  • Also compatible with DELTA 2 to push that system from 1024Wh to 3072Wh
  • LFP battery: 3,000+ cycles to 80%+ capacity — decade-scale service life at regular use
  • Direct expansion port connection — no additional hardware, cables, or configuration required
  • Charges simultaneously with the host station via all supported input methods
  • EcoFlow BMS maintains charge balance between station and extra battery automatically

General

  • Capacity: 2048Wh
  • Battery Chemistry: LiFePO4 (LFP)
  • Battery Life Cycles: 3,000+ to 80%
  • Compatibility: EcoFlow DELTA 2 Max

Features

  • Connection: Direct expansion port — no additional hardware
  • Charging: Charges simultaneously with host station

Dimensions & Weight

  • Weight: Approx. 51 lbs (23 kg)

This item comes with a 5-Year Factory Warranty from EcoFlow. A 3-Year Standard Warranty is included automatically from the date of original purchase, covering defects in materials, workmanship, and performance under normal use. An additional 2-Year Extended Warranty is available at no extra charge — activate it by downloading the EcoFlow App, logging into your EcoFlow account, and registering your product using the unit serial number within the standard warranty period. This gives you up to 5 years of total factory warranty coverage. Exclusions apply for damage caused by misuse, unauthorized modification, disassembly, or exposure to excessive heat or liquids. For warranty claims: support@ecoflow.com or 1-800-368-8604.