Fortress Power Envy 8/10kW Hybrid Inverter
The Fortress Power Envy 8/10kW Hybrid Inverter is a all-in-one solution for whole-home solar energy storage, backup power, and off-grid systems. Delivering up to 8kW (33.3A @ 240V) or 10kW (41.6A @ 240V) of continuous output through a 60A AC passthrough, it ensures your home or small business stays powered reliably.
With AC/DC coupling, dual MPPTs, and a built-in generator input, the Envy supports up to 13kW of solar PV input (8kW mode) or 15kW (10kW mode), making it versatile for on-grid and off-grid applications. It’s also compatible with third-party batteries from Pytes, Zetara, Meritsun, and more, giving you flexibility to design your system.
Installation is simple and code-compliant, thanks to integrated AC and DC breakers and a built-in APsmart Module Level Rapid Shutdown Transmitter. Take full control via the Fortress Power Guardian mobile app—monitor performance, track solar production, and receive remote firmware updates anytime.
Approved by utilities across the U.S. and Puerto Rico, the Envy 8/10kW also supports Virtual Power Plant (VPP) programs, letting you earn compensation for discharging energy back to the grid during peak 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
🔋 Scalable Solar + Storage Performance
Delivers up to 13 kW PV input with selectable 8kW or 10kW output. Parallel up to 10 units to expand as your energy needs grow.
🔌 Plug-and-Play Installation for Faster Setup
Built-in AC/DC breakers and wire management simplify setup for both retrofit and new systems.
🛑 Built-In Rapid Shutdown for Code Compliance
Integrated rapid shutdown transmitter ensures NEC code compliance without extra devices, saving time and cost.
🔋 Supports Split-Phase and Three-Phase Applications
Works with 120/240V split-phase or 120/208V & 127/220V three-phase setups for versatile residential and commercial use.
💵 Virtual Power Plant (VPP) Ready
Participate in utility demand response programs and earn by discharging energy during peak periods.
🛜 Remote Monitoring and Firmware Updates
Track solar production, battery performance, and grid usage via the Fortress Power app, with remote firmware updates for convenience.
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 |
