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55
FP-ENVY-12KW
INSTALLATION/USER MANUAL
COMPLETE YOUR SOLUTION WITH
FORTRESS POWER
BATTERIES
*Batteries are not Included
Important
: Verify the system configuration before installing.
A proper system design is required for warranty purposes.
Improper system configuration will void the warranty."
2025 Fortress Power LLC. All rights reserved.
Information subject to change without notice.
FORTRESS POWER LLLC
FP-12K-MV.11
1
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Related Manuals for Fortress Power Envy True 12KW
Summary of Contents for Fortress Power Envy True 12KW
- Page 1 : Verify the system configuration before installing. A proper system design is required for warranty purposes. Improper system configuration will void the warranty.” 2025 Fortress Power LLC. All rights reserved. Information subject to change without notice. FORTRESS POWER LLLC FP-12K-MV.11...
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Page 2: Table Of Contents
Generator Connection .............................. 27 11.3.4 AC Coupling Connection ............................28 11.3.5 Third party RS485 communication ..........................28 COMMISSIONING AND POWERING DOWN SEQUENCE ......................29 12.1 ................................ 29 TART UP THE NVERTER 12.2 ..............................29 HUT DOWN THE NVERTER FORTRESS POWER LLC FP-12K-MV.11... - Page 3 IRMWARE PDATE MONITOR SYSTEM SETUP ..............................40 15.1 ..............................40 ONGLE ONNECTION 15.1.1 Envy Fortress Power Mobile APP Method........................40 15.1.2 IP Address method (Alternative method) ........................41 15.2 ................................42 EGISTER CCOUNT ENVY PROGRAMMING THROUGH LCD INTERFACE ........................ 43 16.1...
- Page 4 ............................... 60 EGULAR AINTENANCE 19.2 LED D ..................................60 ISPLAYS 19.3 LCD D ..........................60 ROUBLESHOOTING ASED ISPLAYS 19.3.1 Fault on the LCD ............................... 60 19.3.2 Alarm on the LCD ..............................62 CONTACT INFORMATION ..............................64 FORTRESS POWER LLC FP-12K-MV.11...
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Page 5: Abbreviations
VDC = Volts Direct Current LFCO = Low Voltage Cut-Off VPP = Virtual Power Plant LFP = Lithium Ferro Phosphate W = Watts (Power) LN1 = AC Line 1 LN2 = AC Line 2 LV = Low Voltage FORTRESS POWER LLLC FP-12K-MV.11... -
Page 6: Change Log
Added side and back Knockout holes FP-12K-MV.11 • Added bottom lid for ease of wire accessibility and installation. Applicable using the eForce Battery, FlexTower Enclosure or any third party wireway manufacturer. • RSD installation configuration port change • UPDATED DATASHEET INFORMATION FORTRESS POWER LLC FP-12K-MV.11... -
Page 7: Safety
Beware of hot surfaces during inverter operation, the inverter and some parts of the system could be hot when working, please do not touch the inverter surface or most of the parts when they are working. During inverter working states, only the LCD and buttons could be touched. FORTRESS POWER LLC FP-12K-MV.11... -
Page 8: Introduction
Beyond that, please find additional resources within our Support Portal https://support.fortresspower.com/portal/en/kb • Create a support ticket. • Inverter Guides • Product Manuals • Firmware Updates • Warranty Submittal • System Design • Application Notes • Scheduled Meetings • Accessories FORTRESS POWER LLC FP-12K-MV.11... -
Page 9: System Solution
PV Array PV Array Generator 48V Batteries Generator Load 48V Batteries Load PV Array PV Array 48V Batteries Load Load DIAGRAM NUMBER APPLICATIONS Off-Grid On-Grid, Backup, Net-Metering, Zero-Export AC Coupling, AC /DC COUPLING No Battery Smart Load FORTRESS POWER LLC FP-12K-MV.11... -
Page 10: Data Sheet
96.9% BATTERY DATA TYPE Lithium battery/ No Battery MAX. CHARGE CURRENT(A) MAX. DISCHARGE CURRENT(A) NOMINAL VOLTAGE(V) VOLTAGE RANGE(V) 40-60 MIN-MAX. VOLTAGE(V) 40-60 SAFETY PV REVERSE POLARITY PROTECTION DC SWITCH FOR EACH MPPT OUTPUT OVER-VOLTAGE PROTECTION VARISTOR FORTRESS POWER LLLC FP-12K-MV.11... -
Page 11: General Data
Touch color screen COMMUNICATION INTERFACE Rs485/ Wi-Fi/ CAN STANDARD WARRANTY 10 Years ALTITUDE LIMITATION PERFORMANCE 0-2000M 12kW *ALTITUDE LIMITATION PERFORMANCE INCLUDE MAX 2000-3000M 10.2kW CHARGING, DISCHARGING, ACTIVE POWER AND BACKUP 3000-4000M 8.4kW OUTPUT KW >4000M Not allowable FORTRESS POWER LLC FP-12K-MV.11... -
Page 12: Unboxing
6. U NBOXING FORTRESS POWER LLC FP-12K-MV.11... - Page 13 Battery To Inverter COMM Cable & Inverter to Inverter Communication Cable Cabinet Keys RJ45 Terminals Mounting Screw for Wooden Platform 6 each Expansion Screw 6 each Cross Head screws for L-Shaped Brace Cross Head Screws for Dongle Knockout Hole Template FORTRESS POWER LLC FP-12K-MV.11...
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Page 14: Requirements
GENERATOR CABLE UP TO 90A PORT Up to 3 5/16-3/8inch(8~10mm) Included Mechanical Lug, Requires Allen 5/16 SAE PV CABLE PV INPUT 10-6 1/4-5/16 in (6~8mm) Spring Clamp Note: Cable gauge also will depend on connection distance FORTRESS POWER LLLC FP-12K-MV.11... -
Page 15: Inside The Envy Wire Cabinet
Generator Connection Port (up to 90A) (AC Coupling Up to 12kW) Load Connection Port Grid Connection Port (Up to 200A) PV Input Connection Protective Earth or Ground Connection Bars Neutral Connection Bar Apsmart Transmitter (SUNSPEC Compliant) FORTRESS POWER LLLC FP-12K-MV.11... -
Page 16: 8.2 Communication Board Ports Definition
Rapid Shut Down Connections External Current Meter Sensor port. It Cannot be used In combination with included CT 12Vdc: Reserved for customer to use, Max 500mA. Note, only use port +12V and G Fan Connection Port FORTRESS POWER LLC FP-12K-MV.11... -
Page 17: Envy Dimensions
Side knockout Hole for 1 ½ inch conduit Leveling Wall Support Bracket Support Back side knockout hole for 1 ½ in. conduit Back side knockout hole for 1in. conduit Back side knockout hole for 1 ¼ in. conduit FORTRESS POWER LLLC FP-12K-MV.11... -
Page 18: Knockout Port Dimensions
Please note that if the installation involves an outdoor setting do not create rectangular openings in the wireway but rather use the conduit that leads into the knockout hole section of the Envy. FORTRESS POWER LLC FP-12K-MV.11... -
Page 19: Installation
Otherwise install in the correct property side orientation as described in the figure below. Consider Using Fortress Power Enclosure to mitigate extreme weather conditions. -
Page 20: Wall Mounting The Envy
Take appropriate measures to ensure that the conduit and conduit fittings are fastened reliably and seal the cable entry holes. Insert the conduit fitting into the opening for PV connection and tighten it from the inside using the counter nut. Route the PV conductors through the conduit fitting and into the inverter. FORTRESS POWER LLLC FP-12K-MV.11... - Page 21 RSD R RSD R RSD R RSD R RSD R RSD R RSD R Additional Grounding Electrode (Rod) for 20A PV Fuse Breakers per Solar PV Panels is recommended. String Do not ground negative cables. (optional) FORTRESS POWER LLC FP-12K-MV.11...
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Page 22: Rapid Shut Down (Rsd)
You may retrofit a Tigo Transmitter by simply disconnecting the 12V supply from the Apsmart Transmitter as shown in the picture below. Device Voltage Rating (V) Current (A) APsmart Single Core Transmitter Tigo RSS Transmitter FORTRESS POWER LLLC FP-12K-MV.11... -
Page 23: Retrofitting Tigo Products
Removing the Apsmart Transmitter Tigo 12V Transmitter Tigo Transmitter Connection FAN1 FAN2 FAN3 BAT COM INV 485 Parallel B2 485 STOP Cloud Connect Connection FAN1 FAN2 FAN3 BAT COM INV 485 Parallel B2 485 STOP FORTRESS POWER LLC FP-12K-MV.11... -
Page 24: External Rsd Emergency Switch
LCD USB UPDATE FAN1 LCD USB UPDATE FAN1 FAN2 FAN2 FAN2 FAN3 FAN3 FAN3 BAT COM INV 485 BAT COM INV 485 BAT COM INV 485 Parallel Parallel Parallel B2 485 B2 485 B2 485 STOP FORTRESS POWER LLC FP-12K-MV.11... -
Page 25: Battery Connection
18.5kWH PCS COM Battery to Inverter RS485 Battery to Inverter Communication Cable (Included) Communication Cable CAN protocol Use the included SOL- ARK/CAN eForce 19.2kWh comm cable When Using eFlex MAX eFlex 5.4kWH eFlex 5.4kWH eFlex 5.4kWH FORTRESS POWER LLC FP-12K-MV.11... -
Page 26: Paralleling Multiple Inverters
BAT RS485 B BAT RS485 A BAT CAN H BAT CAN L Please Refer to our minimum Battery Sizing Standard when sizing with the ENVY Inverter. Please Refer to the eFlex eVault Max Installation Manual for more details. FORTRESS POWER LLLC FP-12K-MV.11... -
Page 27: Ac Connection
240V/120V, 120/208V or 120/208V 3 phase output. When the generator starts, all the loads connected to EPS Load will be supplied by the generator while simultaneously charge the batteries. FORTRESS POWER LLC FP-12K-MV.11... -
Page 28: Ac Coupling Connection
The power will drop to zero before the over frequency trip threshold is reached. When the Fortress Power hybrid inverter requires the grid interactive inverter to reduce power, it simply shifts the output frequency up a bit, the grid-interactive inverter will limit its output power accordingly after sensing this frequency shift. -
Page 29: Commissioning And Powering Down Sequence
Inverter will power up. i. If the Inverter does not power up, Stop and correct the issue until it powers up Perform Firmware Inverter Update using the Envy Fortress Power APP. Place the Inverter in Standby mode. LCD screen - Basic section Confirm the Inverter is set up and running. -
Page 30: Wiring Diagrams And Lcd Programming
There should be only one Neutral to Ground Bond established on the supply side of the electrical system. For requirements of connection safety, please refer 2020/2023 NEC 705.11 or 2017 NEC 705.12A Always adhere to your local jurisdiction guidelines and make sure that an Electrician makes all electrical connections. FORTRESS POWER LLLC FP-12K-MV.11... -
Page 31: Backup Applications With Backfeeder Connection (Split-Phase Service 120/240V & 120/208V)
There should be only one Neutral to Ground Bond established on the supply side of the electrical system. For requirements of connection safety, please refer 2020/2023 NEC 705.11 or 2017 NEC 705.12A Always adhere to your local jurisdiction guidelines and make sure that an Electrician makes all electrical connections. FORTRESS POWER LLLC FP-12K-MV.11... -
Page 32: Combined Or Individual Ac Coupling/Dc Coupling Applications With A Feeder Tap Connection
Always adhere to your local jurisdiction guidelines and make sure that an Electrician make all electrical connections. Depending on your Local Jurisdiction a feeder tap breaker might be required between the Manual Bypass Switch and the feeder tap. For requirements of connection safety, please refer 2020/2023 NEC 705.11 or 2017 NEC 705.12A FORTRESS POWER LLLC FP-12K-MV.11... -
Page 33: Off Grid Applications Connection (Split-Phase Service 120/240V)
There should be only one Neutral to Ground Bond established at the Load panel of the electrical system. Always adhere to your local jurisdiction guidelines and make sure that an Electrician make all electrical connections. For requirements of connection safety, please refer 2020/2023 NEC 705.11 or 2017 NEC 705.12A FORTRESS POWER LLLC FP-12K-MV.11... -
Page 34: Battery Less Connection (Split-Phase Service 120/240V, 120/208V)
Always adhere to your local jurisdiction guidelines and make sure that an Electrician make all electrical connections. For requirements of connection safety, please refer 2020/2023 NEC 705.11 or 2017 NEC 705.12A FORTRESS POWER LLLC FP-12K-MV.11... -
Page 35: Paralleled Systems Applications With A Feeder Tap Connection (Split-Phase Service 120/240V, 120/208V)
Always adhere to your local jurisdiction guidelines and make sure that an Electrician make all electrical connections. Depending on your Local Jurisdiction a feeder tap breaker might be required between the Manual Bypass Switch and the feeder tap. For requirements of connection safety, please refer 2020/2023 NEC 705.11 or 2017 NEC 705.12A FORTRESS POWER LLLC FP-12K-MV.11... -
Page 36: Paralleled Systems Applications With A Feeder Tap Connection (3 Phase-Phase Service 120/208V)
Follow the Commissioning Sequence on page 19 and the Paralleling Setup at page 31 Make sure that all the inverters are programmed identically when it comes to functionality, charge & discharge times, power, voltage, current etc. Otherwise, the systems may malfunction. Use only CT1 as described in the image. FORTRESS POWER LLLC FP-12K-MV.11... -
Page 37: Paralleled Systems Applications With A Feeder Tap Connection (3 Phase 120/208V)
Make sure that all the inverters are programmed identically when it comes to functionality, charge & discharge times, power, voltage, current etc. Otherwise, the systems may malfunction. Use CT1&CT2 for the Primary inverter and only CT1 for the Secondary inverter as described in the image. FORTRESS POWER LLLC FP-12K-MV.11... -
Page 38: Firmware Updates
Unplug the USB flash disk (hot-plug feature is supported by USB2 port). You can check the LCD version code in the right bottom side of the LCD display. You can also see the LCD version or Firmware version of the inverter under the “Device info” page. FORTRESS POWER LLLC FP-12K-MV.11... -
Page 39: Envy Inverter Firmware Update
NVERTER IRMWARE PDATE Download the Envy Fortress Power App and access it. Select Download Firmware on the Home Screen of the App Select Download, and three files should download (less than 30s) Disable Cellular Data (to prevent your cellphone from connecting or searching for data as... -
Page 40: Monitor System Setup
The dongle will reboot and take about 1 minute to connect. 5. Confirm that the dongle has connected to the internet by visually checking that there are three LEDS in a green solid state. Set up successfully, dongle will restart later FORTRESS POWER LLC FP-12K-MV.11... -
Page 41: Troubleshoot
Starlink. If this is the case, then add a compatible Wi-Fi extender and connect to it WIFI LED Communication Check if Home Wi-Fi name and password are correct flashing Failure between Dongle and Router 15.1.2 IP A DDRESS METHOD LTERNATIVE METHOD Password: admin FORTRESS POWER LLC FP-12K-MV.11... -
Page 42: Register Account
Installers can contact Fortress Power Tech Support to be assigned a code. For DIY users feel free to use the Customer Code: Fortress. 4. Once registered, you can log in using the created credentials. If you want to have more stations that need to be created, you can create them as stated in the image below. -
Page 43: Envy Programming Through Lcd Interface
Home Screen page of the inverter. FIGURE# NAME DISPLAYS Battery Voltage, SOC Solar MPPT Voltage & Power Production Backup Voltage, Power, and Frequency Grid Voltage, Power, and Frequency Loads Power FORTRESS POWER LLC FP-12K-MV.11... -
Page 44: Basic Section
AC Charge will obey the time ranges. Users can charge batteries with grid power when electricity prices are cheap, and discharge battery power to supply load or export to IME OF the grid when electricity prices are high. FORTRESS POWER LLC FP-12K-MV.11... -
Page 45: Lead Acid /Open Loop Settings
Generator and simultaneously charge the batteries. Generator Exercise button (Available in Envy APP and Web Portal) Note:You must have an inverter firmware update 1919 or later and LCD firmware update #14 or later SCROLL DOWN FORTRESS POWER LLC FP-12K-MV.11... -
Page 46: Generator
End SOC (%): The SOC at which the AC coupled inverters are shut down when in off- grid mode. 90% recommended. Start SOC (%): The SOC at which the AC coupled inverters are turned on when in off- grid mode. 50%~70% recommended FORTRESS POWER LLC FP-12K-MV.11... -
Page 47: Gen Boost Feature (Available In Web Portal)
If Gen boost is disabled, the inverter will prioritize loads and charge batteries simultaneously using the Gen Charge ADC parameter until the End Charge SOC/V is met. Generators should be sized correctly when used in this way. FORTRESS POWER LLC FP-12K-MV.11... -
Page 48: Discharge Section
SOC<85% or PV power<300w, the Smart Load Port switch off. Note: If you enable the Smart load function, it’s forbidden to connect the generator at the same time, otherwise the device will be damaged! 16.5 DVANCED ECTION FORTRESS POWER LLC FP-12K-MV.11... -
Page 49: Offgrid Output
NO, BATTERY, LEAD-ACID (Open Loop), LITHIUM ATTERY Lithium Brand LITHIUM 18 (FORTRESS POWER Protocol). Confirm batteries are communicating in the Detailed System information Section. Lead Capacity (Ah) Set battery bank capacity for open loop settings. Leave default value if Closed Loop. -
Page 50: Paralleling Setup (Lcd Interface )
16.6 (LCD I ARALLELING ETUP NTERFACE Single Split Phase 120/240V Paralleling. Utility Voltage Setup Primary Inverter Secondary Inverter Secondary Inverter 3Phase 120/208V Paralleling (3 inverters) Utility Voltage Setup Primary Inverter Secondary Inverter Secondary Inverter FORTRESS POWER LLC FP-12K-MV.11... -
Page 51: 3Phase 120/208V Paralleling (2 Inverters)
When paralleling multiple Inverters, make sure to complete paralleling process by identifying which is the Primary inverter and the secondary on Parallel System area under the Advance Section. You can confirm by Selecting the Home Icon and view how many inverters are in connection (PNUM) and which Role each has (P=Primary, S=Subordinate) FORTRESS POWER LLC FP-12K-MV.11... -
Page 52: Lcd Detailed
To confirm Batteries have been installed correctly and are communicating with the inverter, please refer to the Battery side of this section and note the “Imaxdischg”. For each eFlex 5.4kWh installed the value should be 60A. For each eVault 18.5kWh installed, the value should be 250A. For FORTRESS POWER LLC FP-12K-MV.11... -
Page 53: Monitoring
ONITORING The Fortress Power Envy Application facilitates remote access of your Fortress power system, permitting visibility and control from any location at any given time. Users are provided the opportunity to tailor energy conservation tactics specific to their domestic requirements, while also availing themselves of distinctive features designed to augment daily living. -
Page 54: Consumption Overview
This graph displays the daily power curve, showcasing solar energy production, battery charging/discharging activities, as well as power imported from or exported to the grid and overall consumption. Moving your cursor over the chart will highlight precise data points for specific moments throughout the day. 17.8 NERGY UMMARY FORTRESS POWER LLC FP-12K-MV.11... -
Page 55: Data View
3. SOC(%): State of Charge of the battery 4. vBat: Voltage of the battery 5. Vacr: Voltage of the AC output (phase R) 6. Qac: Reactive power at the AC output 7. Vepsr: Standard voltage for the EPS FORTRESS POWER LLC FP-12K-MV.11... -
Page 56: Data History Overview
We recommend that end-users primarily engage with the 'Monitor', 'Chart', and 'Energy' sections, which offer a more intuitive grasp of system performance. Conversely Fortress Power and installers partners are advised to delve into these critical metrics for efficient diagnostic processes. FORTRESS POWER LLC FP-12K-MV.11... -
Page 57: Local Data Insights
VERVIEW The 'Event History' area provides a chronological log of significant occurrences, including notices and faults. A lack of entries in the 'Event History' suggests that the hybrid inverter is functioning smoothly, without any reported problems. FORTRESS POWER LLC FP-12K-MV.11... -
Page 58: Mobile App Monitoring
Displays the operating status of the inverter. Click on "Notice" to access the Events page and view alarm information. Refresh Button Last Updated Time Star Gen Manually BATTERY QUICK CHARGE from Grid (1HR) Inverter Rated Power Firmware Version FORTRESS POWER LLC FP-12K-MV.11... -
Page 59: Real Time And Historical Data
18.1 EAL TIME AND ISTORICAL FORTRESS POWER LLC FP-12K-MV.11... -
Page 60: Troubleshooting & Maintenance
DSP FAILURE Restart inverter, if the error still exists, contact MODEL Incorrect model value Fortress Power service or your inverter supplier. FAULT 1. Check if the L1, L2 and N wires are connected correctly at inverter EPS Load EPS SHORT Inverter detected short-circuit on output port. -
Page 61: Temperature Fault
PV voltage is too high fault still appears, contact Fortress Power service o your inverter supplier. Hardware level over current Restart inverter, if the error still exists, contact Fortress Power HARD OVER protection triggered service or your inverter supplier. CURR... -
Page 62: Alarm On The Lcd
L If all is c orrec t but this error pers is ts, please FAI LURE communicate with c onta c t Fortress Power s ervic e or your inverter s upplier. battery Res tart inverter, if the error pers is ts, c ontac t Fortress Power... - Page 63 3. Check if there is ground fault on grid and load side; I nverter detec ted leakage c urrent TRIP BY GFCI 4. Restart inverter. If the fault remains, contact Fortress Power on AC side HIGH service or your inverter supplier.
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Page 64: Contact Information
ONTACT NFORMATION For Technical Support Please Contact us at Tech-Support Contact Information Useful Links • Phone: Tech Support (877) 497-6937 Tech Support (Spanish) (215) 710-8960 • Support Tickets: https://www.fortresspower.com/support/ Warranty Submittal: https://www.fortresspower.com/warranty/ FORTRESS POWER LLC FP-12K-MV.11...
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