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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

Our Price: $6,289.00
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

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


Input DC (PV Side)
Max. DC Input Power for Single MPPT 12000W/7000W/7000W
1 x 12kW, 2 x 7kW
Max. PV Input Power 21,000 W
Max. PV Power Delivered to Battery & AC Outputs 18,000 W
DC Input Voltage Range 100V-600V (550V Max Recommended)
Nominal DC Input Voltage 360V
Full Power MPPT Voltage Range 230V-500V
Max. DC Input Current 25A/15A/15A
Max. Short Circuit Input Current 31A/19A/19A
MPPT Number/(Strings per MPPT) 3(2/1/1)
Output/Input AC (Grid)
Continuous AC Power to Grid 12000W (240V) / 10400W (208V)
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) / 10400W (208V) Nominal Output
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 <20 ms
Dedicated Auto-start Generator Port 100A Max / 90A Continuous
Battery Parameters
Compatible Battery Type Lithium and Lead Acid Batteries
Nominal Battery Voltage 48V
Battery Voltage Range 40V-60V
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) Also Compatible with Tigo Transmitters (refer to manual)
General Data
Dimensions 34.2" x 20.5" x 11.2"
(870 x 520 x 285 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, Lithium Batteries or Fortress Lithium Batteries

Product Highlights

  • All-In-One Solution (PV, Generator, On/Off Grid, AC/DC Coupling)
  • Whole Home 200A AC Passthrough and Backup
  • Max. 18 kW PV Power Delivered to Battery & AC Outputs
  • 12 kW (50A @240V) Backup Power
  • 10.4kW (50A @208V) 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 and AC/DC combined coupling
  • 120/240V, 120/208V & 208V 3 Phase capable
  • IP65 rated for Indoor & Outdoor Installation
  • Built-in Generator Input
  • 10 units in parallel
  • Local and remote monitoring / app
  • Color LCD touch screen
  • Batch Settings

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