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Fortress Power

Fortress Power home battery backup systems, built around lithium battery storage for grid-outage backup and solar energy storage.

These systems are designed to integrate with a home's electrical panel for whole-home or partial-home backup, rather than functioning as a portable power station — installation typically requires an electrician.

Battery capacity should be sized around which circuits you actually want to keep running during an outage, not your home's total electrical load, since backing up everything usually isn't necessary or cost-effective.

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  • 5kWh Fortress LFP-5K-48V Lithium Battery (100Ah) - Green Vista Living
    5kWh Fortress LFP-5K-48V Lithium Battery (100Ah)
    Fortress 5kWh 48V Lithium Battery with 100Ah Capacity   The Fortress BATTERY LFP-5K-48V is a 48 Volt Lithium Iron Phosphate Battery form Fortress Power. It's 100Ah super charge capacity can store power upto 5kWh. The advanced Lithium Ferro Phosphate (LFP) technology operates a wider...
    $3,399.00
    $3,999.00
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  • Fortress Power - Guardian Battery Monitoring for eFlex & eVault Max - Green Vista Living
    Fortress Power - Guardian Battery Monitoring for eFlex & eVault Max
    Fortress Power - Guardian Battery Monitoring for eFlex & eVault Max Introducing the Guardian Battery Monitoring System by Fortress Power, your go-to solution for optimizing the performance of your eFlex and eVault Max batteries. This innovative system merges advanced technology with dependable monitoring features,...
    $350.00
    $350.00
    $350.00
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  • Fortress Power DuraRack - Green Vista Living
    Fortress Power DuraRack
    Fortress Power DuraRack Boost your energy storage capacity with the Fortress Power DuraRack. This robust iron enclosure accommodates up to 4 eFlex 5.4kWh batteries and can be expanded to hold 4 units (totaling 15 eFlex batteries, equivalent to 81kWh). The DuraRack features built-in busbars...
    $1,899.00
    $2,495.00
    $1,899.00
    Save $596.00
  • Fortress Power eBoost 16kWh Solar Battery - Green Vista Living
    Fortress Power eBoost 16kWh Solar Battery
    Fortress Power eBoost 16kWh Solar Battery with eWay Lite | Simplified DIY Wiring Solution Compact, DIY-Friendly, Efficient The Fortress Power eBoost with eWay Lite is a high-capacity 16kWh solar battery optimized for simplified DIY installations. Designed for single-inverter setups, the eWay Lite provides clean,...
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    $4,359.00
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  • Fortress Power eFLEX 5.4 kWh Lithium Iron Phosphate Battery - Green Vista Living
    Fortress Power eFLEX 5.4 kWh Lithium Iron Phosphate Battery
    Fortress Power eFLEX 5.4 kWh Lithium Iron Phosphate Battery   Fortress Power announces the eFlex 5.4 kWh scalable energy storage battery solution. The unit uses safe and high energy density prismatic Lithium-Iron-Phosphate cells. The battery has a built-in data storage and Wi-Fi for remote...
    $3,599.00
    $4,599.00
    $3,599.00
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  • eFLEX MAX lithium battery pack with metallic casing, product labels, and black connectors
    Fortress Power eFlex MAX 5.4kWh
    Fortress Power eFlex MAX 5.4kWh  Discover the power and flexibility of the eFlex MAX 5.4 LFP Battery, designed to provide you uninterrupted power in the most demanding environments and weather conditions. This top-tier lithium battery combines advanced technology with practical design to meet a...
    $1,499.00
    $2,999.00
    $1,499.00
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  • Fortress Power eForce 9.6kWh Stackable LFP Battery (IP 65 Rated) - Green Vista Living
    Fortress Power eForce Stackable LFP Battery (IP 65 Rated)
    Fortress Power eForce Stackable LFP Battery (IP 65 Rated) Easily add your Fortress Power Envy Inverter (8kw, 10kW or 12kW) for a Whole-Home, All-In-One Indoor/Outdoor ESS (Energy Storage System) The cutting-edge eForce batteries have built-in temperature sensor-controlled heat in each battery module, designed for...
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  • Fortress Power Envy Duo 21 48V Hybrid Solar Inverter – 16kW High-Power Output for Home & Small Business - Green Vista Living
    Fortress Power Envy Duo 21 48V Hybrid Solar Inverter – 16kW High-Power Output for Home & Small Business
    Fortress Power Envy Duo 21 48V Hybrid Solar Inverter – 16kW High-Power Output for Home & Small Business The Envy Duo 21 is Fortress Power’s most powerful 48V hybrid inverter, built to handle both residential and light commercial energy needs. With up to 25kW solar...
    $4,799.00
    $5,998.00
    $4,799.00
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  • Fortress Power Envy True 10 | 10kW Whole Home Solar Storage Inverter - Green Vista Living
    Fortress Power Envy True 10 | 10kW Whole Home Solar Storage Inverter
    Fortress Power Envy True 10 | 10kW Whole Home Solar Storage Inverter The Fortress Power Envy 8kW and 10kW are a whole-home, all-in-one inverter solution. Paired with the Fortress Power eFlex 5.4 kWh, the eVault MAX 18.5 kWh or LFP-10 MAX batteries, the Envy...
    $3,699.00
    $7,312.00
    $3,699.00
    Save $3,613.00
  • Fortress Power Envy True 12 | 12kW Whole Home Solar Storage Inverter | 10 Year Warranty - Green Vista Living
    Fortress Power Envy True 12 | 12kW Whole Home Solar Storage Inverter
    Fortress Power Envy True 12 | 12kW Whole Home Solar Storage Inverter | 10 Year Warranty The Fortress Power Envy True 12 – a whole-home, all-in-one 12kW inverter solution. Paired with the Fortress Power eFlex 5.4 kWh, the eVault MAX 18.5 kWh or LFP-10...
    $4,799.00
    $8,531.00
    $4,799.00
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  • Fortress Power Envy True 8 | 8kW Whole Home Solar Storage Inverter - Green Vista Living
    Fortress Power Envy True 8 | 8kW Whole Home Solar Storage Inverter
    Fortress Power Envy True 8 | 8kW Whole Home Solar Storage Inverter The Fortress Power Envy 8kW and 10kW are a whole-home, all-in-one inverter solution. Paired with the Fortress Power eFlex 5.4 kWh, the eVault MAX 18.5 kWh or LFP-10 MAX batteries, the Envy...
    $3,499.00
    $5,898.00
    $3,499.00
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  • Fortress Power Solo 6.5K Non-export Hybrid Inverter - Green Vista Living
    Fortress Power Solo 6.5K Non-Export Hybrid Inverter
    Fortress Power Solo 6.5K Non-Export Hybrid Inverter The Fortress Power Solo 6.5K delivers 6.5kW of reliable power for off-grid homes, cabins, and backup systems. Its built-in 140A solar charge controller and support for both grid and generator input ensure smooth, uninterrupted operation. Time-of-use scheduling...
    $1,549.00
    $1,649.00
    $1,549.00
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