Fortress Power Envy 8/10kW Hybrid Inverter
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. It is also compatible with third-party batteries from Pytes, Zetara, Meritsun and more!
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
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Off-grid homes and cabins
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Home backup power
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Light commercial energy systems
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DIY solar setups
Envy 8/10kW Inverter Features
Solar Storage Inverter for Residential and Commercial
🔋 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.
Envy 8/10kW Inverter Technical Specs & Downloads
Get the details you need—spec sheets, manuals, and performance data all in one place. We link directly to the manufacturer's site, so you know you always have the most up-to-date information.
| 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 | 14,400W (240V) AC Passthrough/ 12000W (240) GEN | 14,400W (240V) AC Passthrough/ 12000W GEN |
| Nominal Output Voltage | 120/240V Single Split Phase, 120/208V Single Split Phase, 120/208V Three Phase | 120/240V Single Split Phase, 120/208V Single Split Phase, 120/208V Three Phase |
| 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 |
| Efficiency | ||
| MPPT Efficiency | 99.9% | 99.9% |
| Max. Efficiency | 97.5% | 97.5% |
| CEC Efficiency | 96.5% | 96.5% |
| Protection | ||
| Anti-islanding Protection | YES | YES |
| DC Switch | YES | YES |
| Ingress Protect Degree | NEMA 4X, IP65 | NEMA 4X, IP65 |
| SPD Protection | YES | YES |
| AFCI | 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, SGIP, NOM | UL1741, UL1741SB, IEEE1547A, rule 21, ISO-NE, FCC15 class B, HECO, CEC, Luma, SGIP, NOM |
| Warranty | 10 Years | 10 Years |
