Fortress Power eVault Max 18.5kWh Battery

Whole-Home Energy Storage, Built to Last

The Fortress eVault Max 18.5kWh is a powerful lithium battery system designed for full-scale residential and commercial energy storage. Engineered with advanced LiFePO4 technology, the eVault Max delivers safe, reliable, and scalable backup power for homes, businesses, or off-grid sites.

Key Features

• Massive 18.5kWh Capacity – Store more power for larger energy needs, critical backup, or off-grid living.
• LiFePO4 Battery Chemistry – Safe, stable, and long-lasting with over 6,000 cycles.
• High Output – Delivers continuous power at 180A (9.2kW), ideal for large loads or whole-home systems.
• Seamless Integration – Compatible with Fortress inverters, the Guardian monitoring platform, and other leading inverter brands.
• Expandable System – Stack up to 12 units for over 222kWh of storage.
• Built-In BMS – Advanced Battery Management System protects against over-voltage, temperature extremes, and short circuits.

Whether you're preparing for outages, reducing grid reliance, or powering a full off-grid lifestyle, the eVault Max gives you total control over your energy future.

What’s Included:

• 1 × eVault Max 18.5kWh Battery
• Pre-installed BMS
• Integrated Wheels and Handles for Easy Placement
• User Manual

Recommended Add-Ons:

• Fortress Envy 12kW Inverter
• Guardian Gateway
• Mounting Hardware (if stacking)