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Fortress Power True Envy 12kW > 12,000 Watt 48 Volt All-In-One Solar Inverter
Fortress Power Envy True 12kW > 12,000 Watt 48 Volt All-In-One Solar Inverter

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Our Price: $6,259.00
Warranty: 10 Years / Lead Acid or Fortress Lithium Batteries Only

Product Code: FORTRESS-ENVY-12K

Description Videos Datasheet

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

Manufacturer Part Number: Envy True 12kW

Fortress Power - Buy 1 Fortress Power DuraRack & 3 eFlex 5.4 Batteries, Get 1 eFlex FREE

Buy 1 Fortress Power DuraRack, 1 Envy 12kW Inverter
and 3 eFlex 5.4 Batteries
Get 1 eFlex 5.4 Battery for FREE!

Offer Valid Now, Until October 31, 2023

To take advantage of this offer:
Contact our Sales Team at (760) 597.0498 x 2

Click here to purchase bundled system and get FREE 4th eFlex Battery!

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) of whole-home 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
  • Peak Shaving
  • Demand Response Integration
    (Coming Soon)


Input DC (PV Side)
Max. DC Input Power for Single MPPT 12000W/7000W/7000W
1 x 12kW, 2 x 7kW
Max. PV Input Power 21000W
Max. PV Power Delivered to Battery & AC Outputs 18000W
DC Input Voltage Range 100V-600V
Nominal DC Input Voltage 360V
Full Power MPPT Voltage Range 230V-500V
Max. DC Input Current 25A/15A/15A
MPPT Number/(Strings per MPPT) 3(2/1/1)
Output/Input AC (Grid)
Continuous AC Power to Grid 12,000W (240V)
Continuous AC Power to Load with Grid or Generator 48000W (240V) AC Passthrough/ 21000W GEN
Nominal Output Voltage 120V/240V
Max. Continuous AC Current 50A @ 240V
Nominal AC Frequency 50Hz/60Hz
Output AC (Off-Grid)
Max. Output Power 12000W (240V)
Nominal Output Voltage 120V/240V
Nominal Output Frequency 50Hz/60hZ
Nominal Output Current 50A @ 240V
Peak Power 14kW 10 minutes / 16kW 5 minutes / 20kW 500ms
Switching Time Seamless
Dedicated Auto-start Generator Port 100A Max / 90A Continuous
Battery Parameters
Compatible Battery Type eVault Max, eFlex, LFP-10 MAX
Nominal Battery Voltage 48V
Battery Voltage Range 48V-56V
Maximum Charging/Discharging Current 250A
Maximum Charging/Discharging Power 12,000W
MPPT Efficiency 99.9%
Max. Efficiency 97.5%
CEC Efficiency 96.5%
Anti-islanding Protection YES
DC Switch YES
Ingress Protect Degree NEMA 4X, IP65
SPD Protection YES
Rapid Shutdown Device (RSD) Built-in APsmart Transmitter
General Data
Dimensions 31.1" x 20.5" x 10.4"
(790 x 520 x 264 mm)
Weight 127 lbs.
(58 kg)
Display Color LCD
Ambient Temperature Range -4 to 140 F
(-20 to 60 C)
Cooling Fan
Communication RS485 / Wi-Fi / CAN
Standard & Certification
Certifications UL1741, UL1741SB, IEEE1547A, Rule 21, ISO-NE, FCC15 class B, HECO, CEC, Luma
Warranty 10 Years / Lead Acid or Fortress Lithium Batteries Only

Product 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 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)

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