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Fortress Power

Fortress Power - 48v Envy Inverter 8kW, 10kW

Fortress Power - 48v Envy Inverter 8kW, 10kW

SKU: Envy Inverter 8 KW-10

Regular price $4,599.00
Regular price Sale price $4,599.00
Sale Temporarily Out of Stock

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Fortress Power - Envy Inverter 8 KW, 10 KW

The Fortress Power Envy 8kW and 10kW are 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 90A AC passthrough providing up to 8kW (33.3@ 240V) or 10kw (41.6A @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 2 MPPT output allowing for a maximum of 13 kW PV array (Envy 8kW) or 15kW PV array (Envy 10kW). The Envy is equipped with a built-in APsmart Module Level Rapid Shutdown Transmitter and Button, along with integrated AC & DC breakers allowing for fast installation and commissioning. Use our online monitoring app to access your system from anywhere.

Key Features:

  • IP65 Rated For Indoor & Outdoor Installations
  • 2 MPPTs Output For:
    • Max Input 13KW PV Array (Envy 8kW) 
    • Max Input 15KW PV Array (Envy 10kW)
  • AC/DC Coupling
  • 90A Built-In Auto Transfer Switch
  • Built-In Generator Input
  • 5 Units In Parallel
  • Online Monitoring/App
  • Color LCD Touch Screen.
  • 3 Phase Compatible (Upcoming Feature)

Supported Applications:

  • Backup
  • Off-Grid
  • Zero Export
  • Time-Of-Use
  • Virtual Power Plant

Whole-Home Backup One-Line Diagram

Fortress Power Envy 8k


    Envy 8kW Envy 10kW
    Input DC (PV Side)
    Max. DC Input Power for Single MPPT 6000W / 6000 W 6000W / 6000 W
    Max. PV Input Power 13000W 15000W
    Max. PV Power Delivered to Battery & AC Outputs 12000W 12000W
    DC Input Voltage Range 100V-600V 100V-600V
    Nominal DC Input Voltage 360V 360V
    Full Power MPPT Voltage Range 170V-500V 210V – 500V
    Max. DC Input Current 25A / 25A 25A / 25A
    MPPT Number/(Strings per MPPT) 2 / 2 2 / 2
    Output/Input AC (Grid)
    Continuous AC Power to Grid 8000W (240V) 10000W (240V)
    Continuous AC Power to Load with Grid or Generator 21000W (240V) AC Passthrough/ 12000W (240) GEN 21000W (240V) AC Passthrough/ 12000W GEN
    Nominal Output Voltage 120V/240V 120V/240V
    Max. Continuous AC Current 33.3A @ 240V 41.6A @ 240V
    Nominal AC Frequency 50Hz/60Hz 50Hz/60Hz
    Output AC (Off-Grid)
    Max. Output Power 8000W 10000W
    Nominal Output Voltage 120V/240V 120V/240V
    Nominal Output Frequency 50Hz/60Hz 50Hz/60Hz
    Nominal Output Current 33.3A @ 240V 41.6A @ 240V
    Peak Power 16kW / 500ms 20kW / 500ms
    Switching Time Seamless Seamless
    Dedicated Auto-start Generator Port 50A / 12kW 50A / 12kW
    Battery Parameters
    Compatible Battery Type eVault Max, eFlex, LFP-10 MAX eVault Max, eFlex, LFP-10 MAX
    Nominal Battery Voltage 48V 48V
    Battery Voltage Range 48V-56V 48V-56V
    Maximum Charging/Discharging Current 167A 210A
    Maximum Charging/Discharging Power 8000W 10000W
    MPPT Efficiency 99.9% 99.9%
    Max. Efficiency 97.5% 97.5%
    CEC Efficiency 96.5% 96.5%
    Anti-islanding Protection YES YES
    DC Switch YES YES
    Ingress Protect Degree NEMA 4X, IP65 NEMA 4X, IP65
    SPD Protection YES YES
    RSD Built-in APsmart Transmitter Built-in APsmart Transmitter
    General Data
    Dimensions 580 x 490 x 265mm (22.8 x 19.3 x 10.4 in) 580 x 490 x 265mm (22.8 x 19.3 x 10.4 in)
    Weight 44kg (97lbs) 44kg (97lbs)
    Display Color LCD Color LCD
    Ambient Temperature Range -25 to 60 °C (-13 to 140 °F) -25 to 60 °C (-13 to 140 °F)
    Cooling FAN FAN
    Communication RS485/Wi-Fi/CAN RS485/Wi-Fi/CAN
    Standard & Certification
    Certifications UL1741, UL1741SB, IEEE1547A, rule 21, ISO-NE, FCC15 class B, HECO, CEC, Luma UL1741, UL1741SB, IEEE1547A, rule 21, ISO-NE, FCC15 class B, HECO, CEC, Luma
    Warranty 5 Years (Optional 10 Years) 10 Years



    Envy 8k/10kW Inverter – Data Sheet

    Envy 8k/10k Inverter – Manual

    Fortress Power System Design Tool

    Fortress Power Warranty – Envy 8k (CDBG)

    Fortress Power Warranty – Envy 8k / 10k

    NOM Certification



    Warranty information may vary depending on the manufacturer, so please refer to the individual product pages for details. It's important to note that warranties cover damages that occur over time and from use. If an item arrives damaged and is not reported within 30 days, it is not considered a warranty claim.

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    Order delays are beyond The Home Upgrade's control and have proven to be unavoidable. We understand that this may be frustrating, and we kindly ask for your patience and understanding during these challenging times. We appreciate your business and value your patience.


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