Fortress Power EVault Max 18.5kWh LFP Battery

The newest innovative Lithium Iron Phosphate battery from Fortress Power is the eVault Max 18.5 kWh.

An all-in-one solution for your residential and commercial needs. Scalable up to 370kWh with a serviceable top cover access to make installation of this battery simple and worry free.

The eVault Max is AC/DC coupled to solar arrays and works for many applications that require solar storage, including Off-Grid, Back Up power, self-supply and Peak Charge Reduction just to name a few.



What’s included:

  • Large LED Display screen
  • Sleek Industrial-Grade Aluminum
  • Front-Serviceable Cover
  • Transportable on wheels

The eVault Max 18.5 is The Largest Single Residential Battery On The Market:

  • Safe Lithium Iron Phosphate Technology (LiFeP04)
  • High Durability and Long-Lasting
  • Closed Loop Communication with Inverters
  • Scalable from 18.5 kWh – 370 kWh
  • Intelligent Digital Processor Based BMS
  • Advanced cell level monitoring and balancing
  • IP55 Aluminum Industrial Grade Enclosure
  • Touch screen LCD performance display

The Built-In Smart and Reliable Relay-Based Battery Management System integrates multilevel safety concepts for excellent performance:

  • Overcharge and Deep Discharge Protection
  • Over-heat protection
  • Over Current Protection
  • Cell Monitoring and Balancing
  • Voltage and Temperature Monitoring
  • Optimized Internal Structure – Easily Serviceable
  • Handles More Surge Capacity from Inverters

Use solar power all day and night – even during grid outages:

  • Provide power during grid outages
  • Lower your electrical bill by avoiding having to buy electricity at peak times
  • Enjoy a generous tax credit when incorporating with solar (US Only)
  • Increase your independence from the utility grid



Additional information

Weight 520 lbs
Dimensions 20.3 × 20.3 × 42.2 in

Fortress Power


eVault Max 18.5

Rated Power Output [W]


Warranty [Years]