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    • Sol-Ark Pre-Wire >
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      • Outback FLEXpower Radian >
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        • outback fp1 vfxr3524a-01
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      • OutBack FLEXpower TWO FRX >
        • outback FP2 VFXR3648A-01
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    • Grid-Tie Inverters >
      • Schneider Electric (Xantrex) Inverters (grid-tie)
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      • OutBack Off-Grid >
        • GS8048A-01
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        • XW4024-120/240-60
        • Conext XW+ Pro 6848 Inverter 120/240-60
  • Batteries
    • Ark Battery
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    • Fortress Battery >
      • Fortress 5.4 Datasheet
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      • Surrette Flooded - Lead Acid
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    • About charge controllers
    • Outback charge controllers >
      • Outback FM60
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    • MidNite Solar charge controller >
      • Classic 150
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  • Solar Mounting
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    • XW Power Distribution Panel
  • Conext XW+ 6848 NA Comlete Kit

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The Fortress Power Advantage

​Every solar power system needs a quality battery in order to function properly. Our high-performance solar battery storage products offer consistent reliability, superior safety and are easy-to-install. Our products use the most advanced technology in the industry to integrate multilevel safety concepts such as overcharge and deep discharge protection, voltage and temperature observation, single cell monitoring and balancing.


FORTRESS BATTERIES CAN BE PAIRED WITH MOST CHARGERS AND HYBRID INVERTERS AVAILABLE ON THE MARKET

​
Lithium-Iron (LiFePo4) Battery Advantages:Lithium iron phosphate batteries (LiFePO4 or LFP) offer lots of benefits compared to lead-acid batteries and other lithium batteries. Longer life span, no maintenance, extremely safe, lightweight, improved discharge and charge efficiency, just to name a few. 


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eVault MAX 18.5k

Sale! Price: $11,250 plus shipping

​Weight 530.0 lbs
Datasheet
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eFlex 5.4k

Price: $3,500 plus shipping

Weight 150.0 lbs
Datasheet

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  • Home
  • Contact us
    • $ Checkout $
    • Return Policy and Damage Claims
  • Solar Panels
    • Hanwha 395 data
    • Mission 395 data
    • Jinko 410 data
    • HT-SAAE 450 data
  • EMP Shield
    • EMP Home
    • EMP Vehicle
  • Pre-wired systems
    • Sol-Ark Pre-Wire >
      • Sol-Ark 5k
      • Sol-Ark 8k
      • Sol-Ark 12k
      • Sol-Ark 15k
    • Sonnen Core
    • MidNite Solar Pre-wired system
    • OutBack Pre-wired systems >
      • Outback FLEXpower Radian >
        • Outback FPR-8048A-01
        • Outback FPR-4048A-01
      • OutBack FLEXpower ONE FXR >
        • outback fp1 vfxr3524a-01
        • outback fp1 vfxr3648a-01
        • Outback FP1 FXR2524A-01
        • outback FP1 FXR3048A-01
      • OutBack FLEXpower TWO FRX >
        • outback FP2 VFXR3648A-01
        • outback FP2 VFXR3524A-01
        • outback FP2 FXR3048A-01
        • outback FP2 FXR2524A-01
  • Inverters
    • About inverters
    • Grid-Tie Inverters >
      • Schneider Electric (Xantrex) Inverters (grid-tie)
      • Grid-tie OutBack inverters
    • Off-grid inverters >
      • OutBack Off-Grid >
        • GS8048A-01
      • Schneider Electric (Xantrex) Inverters >
        • XW4024-120/240-60
        • Conext XW+ Pro 6848 Inverter 120/240-60
  • Batteries
    • Ark Battery
    • Centennial Battery
    • Fortress Battery >
      • Fortress 5.4 Datasheet
      • Fortress 18.5 Datasheet
    • Fullriver Battery
    • Simpliphi Battery
    • Surrette Battery >
      • Surrette Flooded - Lead Acid
      • Surrette Sealed - AGM
    • U.S. Battery
  • Brumby Pumps
  • Charge Controllers
    • About charge controllers
    • Outback charge controllers >
      • Outback FM60
      • Outback FM80
    • MidNite Solar charge controller >
      • Classic 150
      • Classic 200
      • Classic 250
  • Solar Mounting
  • Xantrex Accessories
    • XW Power Distribution Panel
  • Conext XW+ 6848 NA Comlete Kit