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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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    Fortress Power

    Fortress Power eBoost LFP Battery - 314Ah, 16kWh, 10-Year Warranty

    $4,622.99
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    Fortress Power

    Fortress Power | eForce eWay and Base for AC and DC wire management and floor mount

    $1,180.99
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    Fortress Power

    Fortress Power 600Ah eForce 28.8kWh Stackable Lithium Iron Phosphate Battery

    $14,739.99
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    Fortress Power

    Fortress Power Guardian Battery Monitoring

    $625.99
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    Fortress Power

    Fortress Power eFlex 5.4kWh G2 Lithium Iron Phosphate (LFP) Battery with Wall Mount Bracket | 10 Year Warranty

    $2,623.99
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    Fortress Power

    Fortress Power Envy 12kW Whole Home Solar Storage Inverter

    $6,763.99
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    Fortress Power

    Fortress Power Envy Duo 21, Whole Home Solar Hybrid Inverter

    $6,434.99
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    Fortress Power

    Fortress Power EV 6500-S Off-Grid Inverter - 13kW PV Array, 120/240V

    $1,995.99
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    Fortress Power

    Fortress Power | eForce Cover for Batteries

    $404.99
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    Fortress Power

    Fortress Power | eForce Wallmount Bracket

    $352.99
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    Fortress Power

    Fortress Power 400Ah eForce 19.2kWh Stackable Lithium Iron Phosphate Battery

    $10,215.99
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    Fortress Power

    Fortress Power 200Ah eForce 9.6kWh Stackable Lithium Iron Phosphate Battery

    $5,753.99
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    Fortress Power

    Fortress Power FlexRack Combining Rack for eFlex 5.4 kWh Lithium Batteries

    $2,160.99
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    Fortress Power

    Fortress Envy 12kW Inverter with 4 eFlex G2 5.4kWh Batteries and Durarack Bundle

    $16,455.99
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    Fortress Power

    Fortress eVault 18.5 kWh Battery and Envy 12kW Inverter Bundle

    $14,133.99
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    Fortress Power

    Fortress Envy 12kW Hybrid Inverter, 4 eFlex G2 5.4 kWh Lithium Batteries, Durarack Enclosure and Guardian Battery Monitoring Bundle

    $16,757.99
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    Fortress Power

    Fortress Envy 12kW Inverter and 4 eFlex G2 5.4 kWh Lithium Batteries Bundle

    $18,172.99
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    Fortress Power

    Fortress Envy 12kW Inverter with 18.5 kWh eVault Battery and Guardian Battery Monitoring Bundle

    $13,931.99
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    Sol-Ark

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

    $29,164.99
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    Sol-Ark

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

    $25,800.99
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    Fortress Power

    Fortress Power APSmart Duo RSD-D-20

    $65.99
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    Fortress Power

    Fortress Power FlexTower with Envy True 12 kWh Inverter and 4 eFlex 5.4 kWh LFP Batteries

    $22,331.99
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    Fortress Power

    Fortress Power FlexTower with Envy True 12 kWh Inverter and 3 eFlex 5.4 kWh LFP Batteries

    $16,959.99
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    Fortress Power

    Fortress Power Flex Tower Inverter + Battery Enclosure

    $2,017.99
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