Fortress eFlex 48V 5.4kWh LFP Battery


  • Rugged, Long-lasting, Daily Use Battery
  • Safe Lithium Iron Phosphate Technology (LifeP04)
  • 98% Round Trip Efficiency
  • Flexible Mounting Options
  • Remote Monitoring including wifi, modbus, and canbus
  • BMS Monitors & Balances Individual Cells
  • NRTL certified to UL9540 and UL9540a standards


SKU: eFlex 5.4 Category: Tags: ,

Great for larger mobile or stationary systems, these 48v Lithium batteries by Fortress Power have a built-in BMS and communications protocol that for closed-loop communication.

Box icons created by Smashicons - Flaticon

Free Shipping on $99+

Ground shipping anywhere in the continental United States.

Price Match Guarantee

Found it somewhere for less? Email us a link and we'll match it.

Lifetime Tech Support

Questions, concerns, and updates: We're here for you.

Weight 116 lbs
Dimensions 21.5 × 17.5 × 7.2 in



Owner/Installation Manual



There are no reviews yet.

Be the first to review “Fortress eFlex 48V 5.4kWh LFP Battery”

Your email address will not be published. Required fields are marked *

Your Cart
Your cart is emptyReturn to Shop
Calculate Shipping
Apply Coupon

Free support in our private Facebook Group.

Ask questions, show off your projects, and get the latest deals and updates!