Fortress Envy 12kW Hybrid Inverter, Three eFlex 5.4kWh Lithium Batteries and Guardian Battery Monitoring

The Fortress Power Envy True 12 kW - a whole-home, all-in-one 12kW 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. 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. The Fortress Power eFlex is a 5.4 kWh scalable energy storage solution based on safe and energy dense prismatic Lithium Iron Phosphate cells. The digital processor Battery Management System (BMS) includes high amperage contactor disconnects and advanced Closed-Loop inverter communication, as well as individual cell voltage monitoring, temperature monitoring, and cell balancing to maximize reliability and longevity. Canbus, modbus, and wifi communication enable internet-of-things compatibility. The IP65 case ensures direct water spray and dust will not penetrate the battery internals from all directions. The unit can be wall mounted, floor mounted, and server rack mounted for hard-to-reach access in renewable, marine, RV, mobile, telecom, railway applications and more. The Fortress Power Guardian is a gateway device that connects Fortress Power Batteries to the cloud. Paired with the companion app, the Guardian will automatically discover connected Fortress Power batteries. This enables battery-level monitoring of key values such as State of Charge, Voltage, Current and Battery Temperature as well as faster, more accurate technical support. Remotely update battery firmware, submit support tickets, chat live with technical support, complete warranty submissions, and securely share installation and monitoring data directly with support engineers- right from the companion app. Expand your energy storage with the new Fortress Power DuraRack! This iron enclosure stores up to 4 eFlex 5.4kWh batteries. The DuraRack paired with multiple eFlex batteries can build a 48V UPS server rack or provide storage capacity to home solar arrays. The DuraRack includes integrated busbars and a DIN rail heater mount. This enclosure can be free-standing or pad mounted and is safe for indoor and outdoor installations. Fortress Power eFlex 5.4 Lithium Battery Storage - We design the eFlex 5.4 with a goal of building the world most robust lithium battery for all different application scenarios and harsh weather conditions. DuraRack Indoor & Outdoor for Fortress eFlex 5.4 kWh Lithium Batteries - Expand your energy storage with the new Fortress Power DuraRack! This iron enclosure stores up to 4 eFlex 5.4kWh batteries. The DuraRack paired with multiple eFlex batteries can build a 48V UPS server rack or provide storage capacity to home solar arrays. The DuraRack includes integrated busbars and a DIN rail heater mount. This enclosure can be free-standing or pad mounted and is safe for indoor and outdoor installations. The Fortress Power Guardian is a gateway device that connects Fortress Power Batteries to the cloud. Paired with the companion app, the Guardian will automatically discover connected Fortress Power batteries. This enables battery-level monitoring of key values such as State of Charge, Voltage, Current and Battery Temperature as well as faster, more accurate technical support. Remotely update battery firmware, submit support tickets, chat live with technical support, complete warranty submissions, and securely share installation and monitoring data directly with support engineers- right from the companion app.

Features

• 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
• Integrated AC & DC Breakers for Fast Installation & Commissioning
• Built-in APsmart Rapid Shutdown Transmitter and Button
• 200A AC passthrough current for whole home backup
• 3 MPPT output for max. 21 kW PV array
• AC, DC and AC/DC combined coupling
• IP65 rated for Indoor & Outdoor Installation
• Built-in Generator Input
• 5 units in parallel
• Local and remote monitoring/app
• Color LCD touch screen
• Batch settings
• Tier 1 Automotive Prismatic Lithium Iron Phosphate Cell with the highest cycle life
• Patented Enclosure design achieves 4 times better thermal performance than our competitors
• IP 65 Dust and Water Proof design for outdoor install
• Flexible mounting options (wall mount, floor-stand or standard 19" industrial server rack mount)
• Rugged, Long-lasting, Daily Use Battery
• Safe Lithium Iron Phosphate Technology (LifeP04)
• 98% Round Trip Efficiency
• Flexible Mounting Options
• Remote Monitoring including wifi, modbus, and canbus
• BMS Monitors & Balances Individual Cells
• NRTL certified to UL9540 and UL9540a standards
• Tier 1 Automotive Prismatic Lithium Iron Phosphate Cell with the highest cycle life
• Patented Enclosure design achieves 4 times better thermal performance than our competitors
• IP 65 Dust and Water Proof design for outdoor install
• Connect to Cloud - Guardian is wi-fi enabled and automatically discovers connected Fortress Power Batteries
• Battery-Level Monitoring - Easily monitor key values such as State of Charge, Voltage, Current, Temperature and more
• Warranty Submission - Submit product warranties for enhanced support and peace of mind
• Remote Firmware Updates - Update battery firmware remotely and keep batteries up to date anywhere, anytime
• More Accurate Support - Share installation and monitoring data directly with Fortress support engineers and get help fast
• Live Chat and More - Live chat with technical support engineers right from the companion app through Fortress
• Tier 1 Automotive Prismatic Lithium Iron Phosphate Cell with the highest cycle life
• Patented Enclosure design achieves 4 times better thermal performance than our competitors
• IP 65 Dust and Water Proof design for outdoor install
• Flexible mounting options (wall mount, floor-stand or standard 19" industrial server rack mount)
• NEMA 3R Water and dust assistant for both indoor and outdoor install
• Includes integrated busbars and battery cables for easy stacking
• Easy to add din rail thermostat for cold climates
• Passive cooling vent for warm climates
• Expandable up to 4 units (15 eflex batteries; total 81 kwh)
  

Specifications

• Envy True 12 - Whole Home Energy System

  General Information

  • Type: Whole Home
  • Series/Model: Envy True 12

  Dimensions

  • Inverter: 31.1 x 20.5 x 10.4 in
  • Battery: 21.5 x 17.5 x 7.2 in

  Input DC (PV Side)

  • Maximum DC Input Power for Single MPPT:
    • 1 x 12 kW
    • 2 x 7 kW
  • Maximum PV Power: 21,000 W
  • Maximum PV Power Delivered to Battery & AC Outputs: 18,000 W
  • DC Input Voltage Range: 100-600 V (550 V Maximum Recommended)
  • Nominal DC Input Voltage: 360 V
  • Full Power MPPT Voltage Range: 230-500 V
  • Maximum DC Input Current: 25 A / 15 A / 19 A
  • Maximum Short Circuit Input Current: 31 A / 19 A / 19 A
  • MPPT Number (Strings Per MPPT): 3 (2/1/1)

  Output/Input AC (Grid)

  • Continuous AC Power to Grid:
    • 12,000 W (240 V) / 10,400 W (208 V)
  • Continuous AC Power to Load with Grid or Generator:
    • 48,000 W (240 V) AC Passthrough / 21,000 W GEN
  • Nominal Output Voltage: 120/240 V
  • Maximum Continuous AC Current: 50 A at 240 V
  • Nominal AC Frequency: 50/60 Hz

  Output AC (Off-Grid)

  • Maximum Output Power:
    • 12,000 W (240 V) / 10,400 W (208 V)
  • Nominal Output Voltage: 120/240 V
  • Nominal Output Frequency: 50/60 Hz
  • Nominal Output Current: 50 A at 240 V
  • Peak Power:
    • 14 kW (10 min)
    • 16 kW (5 min)
    • 20 kW (500 ms)
  • Switching Time: <20 ms
  • Dedicated Auto-Start Generator Port: 100 A Maximum / 90 A Continuous

  Battery

  • Compatible Battery Type: Lithium & Lead Acid
  • Nominal Battery Voltage: 48 V
  • Battery Voltage Range: 48-56 V
  • Total Energy: 16.2 kWh (3 x 5.4 kWh)
  • Maximum Charge Current (Continuous): 100 A
  • Maximum Discharge Current (Continuous): 60 A
  • Maximum Pulse Current (5 s): 130 A
  • Capacity: 105 Ah
  • Charging Temperature: 32-113°F (0-45°C)
  • Discharging Temperature: 32-140°F (0-60°C)
  • Storage Temperature: 32-95°F (0-35°C)
  • Life Cycles: 8000 at 80% Depth of Discharge (DoD)
  • Round Trip Efficiency: >98%

  Efficiency & Protection

  • MPPT Efficiency: 99.9%
  • Maximum Efficiency: 97.5%
  • CEC Efficiency: 96.5%
  • Anti-Islanding Protection: Yes
  • DC Switch: Yes
  • Enclosure Rating: NEMA 4X, IP65
  • SPD Protection: Yes
  • AFCI: Yes
  • Rapid Shutdown (RSD): Built-in APsmart Transmitter

  Additional Features

  • Display Type: Color LCD
  • Ambient Temperature Rating: -20 to 60°C
  • Cooling: Fan
  • Communication: RS485 / Wi-Fi / CAN
  • Includes:
    • Inverter
    • (3) eFlex 5.4 kWh Lithium Batteries
    • Durarack Enclosure
    • Guardian Battery Monitoring

  Certifications & Standards

  • Standards: UL1741, UL1741SB, IEEE1547A, Rule 21, ISO-NE, FCC15 Class B, HECO, CEC, Luma

  Warranty & Weight

  • Warranty: 10 Years Limited
  • Weight:
    • Inverter: 127 lbs
    • Battery: 116 lbs

  Applications

  • Backup Power
  • Off-Grid Systems
  • Zero Export
  • Time-of-Use Optimization
  • Peak Shaving
  • Smart Load Management
  • Net Metering
  • Virtual Power Plant (VPP) Ready
  • Microgrid Solutions

Documents 

• Specification Sheet
• Instruction/Installation Manual
• Warranty Information
• Certificate