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Fortress Power Envy & eVault Bundle > 12kW Inverter, 18.5kWh Home Battery
Fortress Power Envy & eVault Bundle > 12kW Inverter, 18.5kWh Battery Storage

Our Price: $15,350.00
Warranty: Inverter: 10 Years / Lead Acid or Fortress Lithium Batteries Only | Battery: 10 year product warranty & guarantee up-to 8000 cycles, whichever comes first.


Description Videos Datasheet

Fortress Power > True Envy 12kW Inverter, 18.5 kWh (360AH) eVault Max Battery

Manufacturer Part Name: Fortress Power Envy 12kW + eVault Max

Components Included:
Fortress Power True Envy 12kW > 12kW 48V All-In-One Solar Inverter Qnty. 1
Fortress Power eVault Max 18.5 > 48 Volt 18.5kWh Battery Qnty. 1

Fortress Power > 12kW 48V All-In-One Solar Inverter

Manufacturer Part Number: Envy True 12kW

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.

The Fortress Power Envy True 12kW 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 features a 200A AC passthrough providing up to 12kW (50A @ 240V) or 10.4kW (50A @208V) of whole-home backup power or small commercial backup power.

The Envy features a built-in generator input with AC/DC coupling, on- and off-grid capabilities, plus a 3 MPPT output allowing for a maximum of 21 kW PV array. The Envy is equipped with a built-in APsmart Module Level Rapid Shutdown Transmitter and Button, along with Pre-built AC & DC breakers allowing for fast installation and commissioning. Use our online monitoring app to access your system from anywhere.

Supported Applications

  • Battery Backup
  • Off-Grid
  • Zero Export
  • Time-of-Use
  • Virtual Power Plant Ready
  • Peak Shaving
  • Smart Load
  • Microgrid

True Envy 12kW Inverter Highlights

  • All-In-One Solution (PV, Generator, On/Off Grid, AC/DC Coupling)
  • Whole Home Backup with 200A AC Passthrough
  • Max. 18 kW PV Power Delivered to Battery & AC Outputs
  • 12 kW (50A @240V) Backup Power
  • Integrated AC & DC Breakers for Fast Installation & Commissioning
  • Built-in APsmart Rapid Shutdown Transmitter and Button

Key Inverter Features

  • 200A AC passthrough current for whole home backup
  • 3 MPPT output for max. 21 kW PV array
  • AC/DC coupling
  • IP65 rated for Indoor & Outdoor Installation
  • Built-in Generator Input
  • 5 units in parallel
  • Online monitoring / app
  • Color LCD touch screen
  • 3 Phase Compatible
    (Upcoming Feature)

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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