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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.

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    Sol-Ark

    Sol-Ark 15K + Fortress Power eFlex Battery + Fortress Durarack Enclosure Bundle

    $23,463.99
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    Sol-Ark

    Sol-Ark 12K + Fortress Power eFlex Battery + Fortress Durarack Enclosure Bundle

    $20,756.99
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