Envy True 12kW Inverter
A 12kW inverter with split-phase and three-phase support, built for whole-home backup, off-grid systems, and advanced solar + storage integration.
Envy True 12kW Inverter
Solar Storage Inverter for Residential and Commercial
The Fortress Power Envy True 12kW is a high-performance, all-in-one hybrid inverter designed for whole-home and light commercial applications. With 21 kW of solar PV input and scalable output up to 120 kW AC by paralleling 10 units, it delivers unmatched flexibility for grid-tied, off-grid, or backup systems. The Envy True 12kW features a 200A AC passthrough, providing uninterrupted power to critical loads and full-home circuits. It’s fully compatible with all Fortress Power 48V batteries, including the eForce, eVault MAX, and eFlex MAX.
Whether you’re looking to achieve energy independence, reduce peak utility rates, or participate in net metering and time-of-use programs, the Envy True 12kW offers advanced control and seamless integration. It even supports zero export and load shifting, helping you optimize energy use and cut electricity costs — with or without solar panels. Approved by utilities across the U.S. and Puerto Rico, the Envy True 12kW also enables participation in Virtual Power Plant (VPP) programs, allowing you to earn compensation for discharging energy back to the grid during periods of high demand.
Applications
Residential
Commercial
FEATURES

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Powerful, Scalable Solar + Storage Performance
With a 21W PV input and 12kW continuous uninterrupted output, the True 12KW offers reliable clean energy and can be expanded by paralleling up to 10 units, with a maximum of 120KW AC output.
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Plug-and-Play Installation for Faster Setup
Designed with built-in AC and DC breakers and generous internal space for wire management, the Envy enables a streamlined installation process — reducing labor time and simplifying wiring for both retrofit and new systems.
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Built-In Rapid Shutdown for Code Compliance
Avoid the hassle of extra components. The Envy True 12kW features a fully integrated rapid shutdown transmitter, helping your installation meet NEC 2017 & 2020 code requirements without the need for external devices — saving time and cost.
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Supports Split-Phase and Three-Phase Applications
The Envy is engineered for residential 120/240V split-phase systems and can also be used in commercial 120/208V or 127/220V three-phase setups with just two or more inverters — offering unmatched versatility for mixed-use projects.
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Virtual Power Plant (VPP) Ready
Join utility demand response programs and get paid to support the grid. The Envy is VPP-compatible and approved by utilities across the U.S. and Canada, allowing your Fortress Power system to discharge energy during peak demand and generate ongoing financial rewards.
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Remote Monitoring and Firmware Updates
Monitor your solar production, battery performance, and grid consumption anytime via the Fortress Power mobile app. The Envy also supports remote firmware updates, ensuring your system stays up to date without the need for onsite visits.

PRODUCT INFORMATION
- Specifications
- Downloads
- Diagrams
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 |
Output/Input AC (Grid) | |
Continuous AC Power to Grid | 12000W (240V) |
Continuous AC Power to Load with Grid or Generator | 48000W (240V) |
Nominal Output Voltage | 120/240V Single Split Phase, 120/208V Single Split Phase, 120/208V Three Phase, 120/220V Three Phase |
Max. Continuous AC Current | 50A @ 240V / 50A @208V |
Nominal AC Frequency | 50Hz/60Hz |
Max. Output Power (Off-Grid) | 12000W (240V) |
Peak Power | 14kW 10 minutes / 16kW 5 minutes / 20kW 500ms |
Switching Time | Seamless |
Compatible Battery Type | Lithium and Lead acid batteries |
Nominal Battery Voltage | 48V |
Max. Efficiency | 97.5% |
Module Level Rapid Shut Down (RSD) | Built-in APsmart Transmitter |
Certifications | UL1741, UL1741SB, IEEE1547A, Rule 21, ISO-NE, FCC15 class B, HECO, CEC, Luma, SGIP, NOM |
Warranty | 10 Years |


VIDEO LIBRARY
Envy True 12kW Video Library
PRODUCT COMPATIBILITY
FREEDOM OF CHOICE WITH OUR ENVY INVERTERS!
Our Envy inverters are battery-agnostic!
What does this mean for you? It means you get to choose the battery that aligns with your vision. Our inverters seamlessly integrate with a wide range of lithium batteries. We have compiled a list of all the battery manufacturers you can choose from!

Info Sheet
Download Here