Envy 8/10kW Hybrid Inverter

One powerful hybrid inverter with selectable 8kW or 10kW output — designed for whole-home backup, off-grid living, and seamless solar + storage integration.

Envy 8/10kW Hybrid Inverter

Solar Storage Inverter for Residential and Commercial

The Fortress Power Envy 8/10kW Hybrid Inverter is an all-in-one solution built for whole-home energy storage and backup. It pairs seamlessly with the eFlex 5.4 kWh, eFlex MAX 5.4 kWh, eVault MAX 18.5 kWh, or LFP-10 MAX batteries and delivers up to 8kW (33.3A @ 240V) or 10kW (41.6A @ 240V) of continuous output through a 60A AC passthrough. With AC and DC coupling, a built-in generator input, and dual MPPTs, the Envy supports up to 13 kW of solar PV input (for 8kW mode) or 15 kW (for 10kW mode), making it ideal for both on-grid and off-grid applications.

Designed for fast, code-compliant installation, the Envy includes integrated AC and DC breakers and a built-in APsmart Module Level Rapid Shutdown Transmitter and Button. System owners and installers can take full control with the Fortress Power Guardian mobile app, offering remote monitoring, performance insights, and firmware updates from anywhere. Approved by utilities across the U.S. and Puerto Rico, the Envy 8/10kW 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

  • Powerful, Scalable Solar + Storage Performance

    The Envy 8/10kW Hybrid Inverter delivers up to 13 kW of PV input and offers a selectable 8kW or 10kW continuous output — perfect for whole-home backup or larger residential systems. Need more power? Parallel up to 10 units for a maximum of 80kW or 100kW of AC output.

  • 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.

  • Built-In Rapid Shutdown for Code Compliance

    Avoid the hassle of extra components. The Envy 8/10kW 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.

  • 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.

  • 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.

  • 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

Envy 8kWEnvy 10kW
Input DC (PV Side)
Max. DC Input Power for Single MPPT6000W / 6000 W6000W / 6000 W
Max. PV Input Power13000W15000W
Max. PV Power Delivered to Battery & AC Outputs12000W12000W
DC Input Voltage Range100V-600V100V-600V
Nominal DC Input Voltage360V360V
Full Power MPPT Voltage Range170V-500V210V – 500V
Max. DC Input Current25A / 25A25A / 25A
MPPT Number/(Strings per MPPT)2 / 22 / 2
Output/Input AC (Grid)
Continuous AC Power to Grid8000W (240V)10000W (240V)
Continuous AC Power to Load with Grid or Generator14,400W (240V) AC Passthrough/ 12000W (240) GEN14,400W (240V) AC Passthrough/ 12000W GEN
Nominal Output Voltage120/240V Single Split Phase, 120/208V Single Split Phase, 120/208V Three Phase120/240V Single Split Phase, 120/208V Single Split Phase, 120/208V Three Phase
Max. Continuous AC Current33.3A @ 240V41.6A @ 240V
Nominal AC Frequency50Hz/60Hz50Hz/60Hz
Output AC (Off-Grid)
Max. Output Power8000W10000W
Nominal Output Voltage120V/240V120V/240V
Nominal Output Frequency50Hz/60Hz50Hz/60Hz
Nominal Output Current33.3A @ 240V41.6A @ 240V
Peak Power16kW / 500ms20kW / 500ms
Switching TimeSeamlessSeamless
Dedicated Auto-start Generator Port50A / 12kW50A / 12kW
Battery Parameters
Compatible Battery TypeeVault Max, eFlex, LFP-10 MAXeVault Max, eFlex, LFP-10 MAX
Nominal Battery Voltage48V48V
Battery Voltage Range48V-56V48V-56V
Maximum Charging/Discharging Current167A210A
Maximum Charging/Discharging Power8000W10000W
Efficiency
MPPT Efficiency99.9%99.9%
Max. Efficiency97.5%97.5%
CEC Efficiency96.5%96.5%
Protection
Anti-islanding ProtectionYESYES
DC SwitchYESYES
Ingress Protect DegreeNEMA 4X, IP65NEMA 4X, IP65
SPD ProtectionYESYES
AFCIYESYES
RSDBuilt-in APsmart TransmitterBuilt-in APsmart Transmitter
General Data
Dimensions580 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)
Weight44kg (97lbs)44kg (97lbs)
DisplayColor LCDColor LCD
Ambient Temperature Range-25 to 60 °C (-13 to 140 °F)-25 to 60 °C (-13 to 140 °F)
CoolingFANFAN
CommunicationRS485/Wi-Fi/CANRS485/Wi-Fi/CAN
Standard & Certification
CertificationsUL1741, UL1741SB, IEEE1547A, rule 21, ISO-NE, FCC15 class B, HECO, CEC, Luma, SGIP, NOMUL1741, UL1741SB, IEEE1547A, rule 21, ISO-NE, FCC15 class B, HECO, CEC, Luma, SGIP, NOM
Warranty10 Years10 Years

Envy 8/10kW Diagram

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

Monitor and control your Envy Inverter Anywhere and Anytime!

✅ Monitor Performance of Each Battery

✅ Update Firmware Over The Air

✅ Participate in Virtual Power Plant Programs