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Fortress Power Battery

Fortress Power Battery

  • Fortress Power eFlex MAX 5.4 Lithium Battery side
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    5.4 kWh Fortress eFlex Max Lithium Battery 48V

    Fortress Power

    $2,000.00
    The Fortress Power eFlex MAX 5.4 is a 5.4 kWh 48V Lithium Ferro Phosphate (LFP) battery with a maintenance-free design rated for 8,000 cycle life at 80% discharge. The Fortress Lithium Battery is easy to integrate with solar or for independent operation...
    eFlex-Max-5.4
    $2,000.00
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  • 18.5 kWh Fortress Power eVault Lithium Battery 48V eVault-18.5
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    18.5 kWh Fortress eVault MAX Lithium Battery 48V

    Fortress Power

    $8,500.00
    The Fortress eVault MAX 18.5 is an 18.5 kWh 48V Lithium Iron Phosphate (LFP) Battery with a built-in battery management system and LCD screen that integrates and displays multilevel safety features for excellent performance. The Fortress eVault Max...
    Fortress-eVault-MAX-18.5
    $8,500.00
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Fortress Power is a Pennsylvania-based manufacturer of compact and reliable lithium battery systems at affordable prices. With Fortress Power smart energy storage, you can continue to use your solar power, even during grid outages. The lithium iron phosphate (LFP) lineup includes the 5, 10 and 18.5kWh batteries with an 8,000 cycle life (more than years of daily use) and a 10-year warranty.

A Fortress Power Energy Storage systems allows you to to maximize your solar PV system by storing excess solar for use on demand.

  • Provide power during grid outages
  • Lower your electrical bill by avoiding peak rate times
  • Independence from the utility grid
  • Renewable energy tax credit when incorporating with solar
WANT A SOLAR PANEL SYSTEM AT THE LOWEST COST? START SOLAR DESIGN

Fortress Lithium Iron Phosphate batteries are designed to work with most 48VDC inverters and chargers available on the market. Below is a list of compatible inverters and chargers.

Brand

Inverter/Charger

Configuration

Fortress Power

8, 10 and 12 kW Inverters

AC or DC coupled

Sol-Ark

5, 8, 12 and 15 kW Inverters

AC or DC coupled

EG4

3, 8 and 12 kW Inverters

AC or DC coupled

Schneider

Conext XW+ series; Conext SW series; Conext XW MPPT charge controller

AC or DC coupled

Outback

Skybox, Radian, and 40V versions of FLEX max charge controller, FLEXpower FXR(A) and FXR (E) series; GVFX series

AC or DC coupled

Magnum

MS 4448PAE; MS 4048-20B

AC or DC coupled

SMA

SUNNY ISLAND 4548-US/6048-US; SUNNY ISLAND 3.0M/4.4M/6.0H/8.0H

AC coupled

Victron

Phoenix VE.Direct Inverter; MultiPlus and Quatro Inverter/Charger; Skylla-TG Charger; General; Color Control or Venus GX

DC coupled

Morning Star

TriStar MPPT 600V; TriStar MPPT; Tristar PWM; MultiWave 4KW

DC coupled

Midnite Solar

Solar Classic 150, 200 & 250; Solar Classic 150, 200 & 250-SL

DC coupled