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Fortress Power eVault Max 18.5 > 48 Volt 18.5kWh Battery - Lithium Iron Phosphate (LiFeP04)
Fortress Power eVault Max 18.5 > 48 Volt 18.5kWh Battery - Lithium Iron Phosphate (LiFeP04)

Our Price: $9,999.00
Warranty: 10 year product warranty & guarantee up-to 6000 cycles, whichever comes first.


Description Datasheet

Fortress Power > 48 Volt 18.5kWh Battery - Lithium Iron Phosphate (LiFeP04)

This new Fortress Power eVault Max 18.5 battery is a breakthrough in technology that is redefining intelligent solar storage batteries! The eVault Max is the ultimate combination of design, functionality, and value for your solar storage needs.

NOTICE: eFlex and eVault batteries will likely need a firmware update when being paired with the Fortress Envy inverter. Software download required. Communication cable provided by Fortress Power upon request. Can be used repeatedly for multiple projects.

Model eVault Max 18.5
Series eVault
Manufacturer Fortress Power


Type Lithium Iron Phosphate (LiFePO4)
Dimensions (L x W x H) 20.3" x 20.3" x 42.2"
Weight 520 lbs
Shipping Method Freight
Nominal Voltage 48V
Mounting Options Floor Standing
Scalability Maximum 20 eVault Max 18.5 batteries in parallel (360 kWh)
Enclosure Protection IP55
Operating Environment Indoor and place away from strong electromagnetic radiation

The eVault Max 18.5 is the Largest Single Residential Battery On The Market!

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, to name a few.

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


  • Safe Lithium Iron Phosphate Technology (LiFeP04)
  • High Durability and Long-Lasting
  • Closed Loop Communication with approved 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
  • Removable Front Cover for Maintenance
  • Improved Cable Management (larger cable landing space)
  • Confirmed UL 9540 Listing
  • USB Port for Advanced Diagnostics

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