Consent Preferences
Skip to content

Get up to 10% off ALL Solar Kits + Free Shipping when you order today!

Fortress Power

Fortress Power – Advanced Lithium Battery Storage for Home and Business

Take control of your energy with Fortress Power lithium battery systems, engineered for reliable whole-home backup, solar self-consumption, and scalable off-grid solutions. Built with premium-grade LiFePO₄ cells, Fortress batteries deliver long life, high efficiency, and unmatched safety — ideal for residential, commercial, or industrial energy storage.

Whether paired with a solar system or used as a standalone backup solution, Fortress Power ensures peace of mind with robust performance and U.S.-based support.

Browse our Fortress Power collection to build a smarter, safer energy storage system today.

Filters

category
$
$
Clear

    Fortress Power

    Fortress Power DuraRack Without Battery

    $1,946.99
    Shop Now

    Fortress Power

    Fortress Power eVault 18.5 kWh Lithium Ferro Phosphate Battery

    $7,123.99
    Shop Now

    Fortress Power

    Fortress Power Envy 10 kW Whole Home Solar Storage Inverter

    $4,938.99
    Shop Now

    Fortress Power

    Fortress Power Envy 8kW Whole Home Solar Storage Inverter

    $4,748.99
    Shop Now

    Fortress Power

    Fortress Power Lithium Iron Phosphate Battery eVault Max 18.5 kWh

    $8,263.99
    Shop Now

    Fortress Power

    Fortress Power Lithium Iron Phosphate Battery eFlex Max 5.4 kWh

    $1,993.99
    Shop Now

Why Wait To Start Saving? Get Started With Build The Power Today.

  • Save 20-50% by buying direct
  • Browse and buy online – no sales meetings
  • Real energy independence for your home
Shop Now
Rated 4.5/5 by our clients

Top Solar and Generator Brands

Free U.S. Shipping

30-Day Returns

Expert Support Team

We help homeowners and businesses take control of their energy costs with direct-to-you power solutions.

Follow us

Get In Touch

  • (507) 636-3614
  • M-F 9-5 EST
  • sales@buildthepower.com
  • 312 W. 2nd St Casper, WY 82601

Useful links

Customer Support

Build The Power. All Rights Reserved.