• EcoFlow DELTA Pro 3 Smart Extra Battery
  • DELTA Pro 3 Extra Battery Left And Front View
  • DELTA Pro 3 Extra Battery Front And Right View
  • DELTA Pro 3 Battery Front View
  • DELTA Pro 3 Battery Front View With Light
  • EcoFlow DELTA Pro 3 Smart Extra Battery Rear View With Closed Battery Port
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EcoFlow DELTA Pro 3 Smart Extra Batteries

EcoFlow

$3,099.00
$3,099.00
In Stock — Ready to Ship
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Product Details

Each DELTA Pro 3 Smart Extra Battery adds 4096Wh of LFP storage to the system — matching the base unit's capacity in a single connection. Two extra batteries push total storage to 12,288Wh: enough for 3–5 days of whole-home essential backup depending on load profile, or continuous off-grid cabin power when paired with a solar array.

With 4,000 rated cycles and LFP chemistry, the Smart Extra Battery is designed to match the DELTA Pro 3's longevity. The EcoFlow Smart Home Panel 3 integration manages all three battery units as a unified system for automatic whole-home failover.

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
  • Each battery adds 4096Wh — same as the base DELTA Pro 3 capacity
  • Two batteries scale system to 12,288Wh: 3–5 days of whole-home backup
  • 4,000-cycle LFP chemistry — matched to DELTA Pro 3's battery specification and longevity
  • Smart Home Panel 3 compatible: manages up to 13 home circuits automatically
  • Direct expansion connection — no inverter, BMS box, or additional hardware required
  • Simultaneous charging via all DELTA Pro 3 input sources: AC, solar, generator

General

  • Color: Black & Galactic Silver
  • Capacity: 4096 Wh
  • Display: LED Array
  • Discharge Temperature: -10°C ~ 45°C | 14 ~ 113°F
  • Charge Temperature: 0°C ~ 45°C | 32 ~ 113°F
  • Storage Temperature: -10°C ~ 45°C | 14 ~ 113°F
  • Wheels Support: No
  • Tie Rod Support: No
  • Stack: Horizontal or Vertical
  • Connection: 1 x Extra Battery Port

Output

  • Output: 40V-58.4V=100A Maximum

Input

  • Input: 40V-58.4V=80A Maximum

Dimensions & Weight

  • Weight: 33 kg | 72.7 lbs
  • Dimensions: 694 × 295 × 215mm | 27.3 x 11.61 x 8.4

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.