The Fortress Power Envy True 12 kW – a whole-home, all-in-one 12kW inverter solution. Paired with the Fortress Power eFlex 5.4 kWh, the eVault MAX 18.5 kWh or LFP-10 MAX batteries, the Envy features a 200A AC passthrough providing up to 12kW (50A @ 240V) or 10.4kW (50A @208V) of whole-home backup power or small commercial. The Envy features a built-in generator input with AC/DC coupling, on- and off-grid capabilities, plus a 3 MPPT output allowing for a maximum of 21 kW PV array. The Envy is equipped with a built-in APsmart Module Level Rapid Shutdown Transmitter and Button, along with Pre-built AC & DC breakers allowing for fast installation and commissioning. Use our online monitoring app to access your system from anywhere.
Key Features:
200A AC Passthrough Current For Whole Home Backup
3 MPPT Output For Max. 21 KW PV Array
AC, DC And AC/DC Combined Coupling
IP65 Rated For Indoor & Outdoor Installation
Built-In Generator Input
10 Units In Parallel
Local And Remote Monitoring/App
Color LCD Touch Screen
Batch Settings
Supported Applications:
Backup
Off-Grid
Zero Export
Time-Of-Use
Peak Shaving
Demand Response Integration (Coming Soon)
Whole-Home Backup / AC Passthrough One-Line Diagram
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
Max. Continuous AC Current
50A @ 240V
Nominal AC Frequency
50Hz/60Hz
Output AC (Off-Grid)
Max. Output Power
12000W (240V)
Nominal Output Voltage
120/240, Single Split Phase, 120/208V Single Split Phase, 120/208V Three Phase
Nominal Output Frequency
50Hz/60hZ
Nominal Output Current
50A @ 240V / 50A @208V
Peak Power
14kW 10 minutes / 16kW 5 minutes / 20kW 500ms
Switching Time
Seamless
Battery Parameters
Compatible Battery Type
Lithium and Lead acid batteries
Nominal Battery Voltage
48V
Battery Voltage Range
48V-56V
Maximum Charging/Discharging Current
250A
Maximum Charging/Discharging Power
12000W
Efficiency
MPPT Efficiency
99.9%
Max. Efficiency
97.5%
CEC Efficiency
96.5%
Protection
Anti-islanding Protection
YES
DC Switch
YES
Ingress Protect Degree
NEMA 4X, IP65
SPD Protection
YES
AFCI
OPT
RSD
Built-in APsmart Transmitter
General Data
Dimensions
31.1 x 20.5 x 10.4 in (790 x 520 x 264 mm)
Weight
127 lbs (58 kg)
Display
Color LCD
Ambient Temperature Range
-20 to 60 °C (-4 to 140 °F)
Cooling
FAN
Communication
RS485/Wi-Fi/CAN
Standard & Certification
Certifications
UL1741, UL1741SB, IEEE1547A, Rule 21, ISO-NE, FCC15 class B, HECO, CEC, Luma, SGIP, NOM
Warranty
10 Years
Product Manuals
Envy True 12 kW Inverter – Data Sheet
Envy True 12 kW Inverter – Manual
Fortress Power System Design Tool
OGPe Certification
NOM Certification
ENVY 12KW UL1741 SB 3RD Ed. ATM
ENVY-eVault Max UL9540 3RD Ed.
Product Warranty
Envy True 12 kW Inverter – Warranty Letter
Product FAQs
Fortress Power Product FAQs
1) Does energy storage work well with my solar system?
Yes. On the grid? Absolutely! Energy storage adds a lot of value to your solar systems. It keeps your solar system operating when your utility service is interrupted. Without energy storage, your PV system will be forced to shutdown when the grid is off.
If you live off grid, energy storage enables you to use the clean solar energy to power your home day and night.
Fortress Power also knows you’re a fan of conservation—energy storage saves both your surplus solar energy and your cash since it reduces on grid energy dependence.
2) Can I use energy storage without solar panels?
Absolutely. For on grid clients, a home energy storage unit stores energy from your electricity provider. If an outage occurs, home energy storage can provide up to 24 hours of potentially life-saving power. Need more reassurance? Fortress Power offers batteries with larger storage capabilities, completely customizable to your needs. And, like you, we appreciate saving money. When electricity is at its lowest daily rate, our smart energy storage units use that period to charge. When peak electric use occurs, our energy storage units can discharge power to suit your lifestyle.
3) What about power outage protection?
Power interruptions shouldn’t disrupt your schedule. An energy storage system will keep your solar system operating during grid outages. When paired with solar panels, an energy storage system supplies unlimited energy delivery. The solar panels power your home during the day and use any excess power to charge the battery. At night, the system keeps your space bright. When used without solar panels, power outage support is dependent on battery size and your energy use. Batteries providing at least 12 hours of backup power are safest.
4) Are home energy storage systems financially beneficial?
You can use the energy storage to shelve your peak usage. When electricity is at its lowest daily rate, our smart energy storage uses that period to charge. During the peak periods, our energy storage system can power your home, reducing your electricity bill. Clients with solar panel installations enjoy a faster return on investment.
5) Do I receive incentives on my energy storage system?
If your energy storage is powered by solar panels, you are eligible for 30% federal tax credit. Many states and utilities provide rebates for homes and businesses with energy storage systems, aiming for grid resilience.
6) What is Lithium batteries lifespan?
We provide a 10 year product warranty and guarantee up-to 8000 cycles, whichever comes first. Speak to our representatives for details.
7) Why choose Lithium Iron Phosphate over Lithium Ion batteries?
We use Lithium Iron Phosphate (LiFePo4; Lithium Ferro Phosphate) technology – the safest lithium technology in the industry. It’s environmentally friendly and can be fully recycled. While Many other competitors, such as LG Chem, Tesla and Panasonic use cobalt-based Lithium-Ion battery, which has a very poor thermal stability. Any short circuit or cell-breakage can cause thermal runaway and catch fire.
And comparatively, Lithium Iron Phosphate battery deliver substantially higher amount of life cycles. We guarantee up-to 6000 cycles, while LG Chem, Tesla and Panasonic provide less than 3000 cycles.
8) Are Fortress Lithium batteries widely compatible?
Yes, our batteries are designed to work with all 48V chargers and hybrid inverters. We work well with Schneider, Outback, Magnum, Sol-Ark, Victron, Morningstar and so on. Please Check out our Inverter Compatibility list.
9) Are permits required for installation?
Legal requirements vary by location. Fortress Power’s technical support team will help you on obtaining permits.
The Fortress Power Envy True 12 kW – a whole-home, all-in-one 12kW inverter solution. Paired with the Fortress Power eFlex 5.4 kWh, the eVault MAX 18.5 kWh or LFP-10 MAX batteries, the Envy features a 200A AC passthrough providing up to 12kW (50A @ 240V) or 10.4kW (50A @208V) of whole-home backup power or small commercial. The Envy features a built-in generator input with AC/DC coupling, on- and off-grid capabilities, plus a 3 MPPT output allowing for a maximum of 21 kW PV array. The Envy is equipped with a built-in APsmart Module Level Rapid Shutdown Transmitter and Button, along with Pre-built AC & DC breakers allowing for fast installation and commissioning. Use our online monitoring app to access your system from anywhere.
Key Features:
200A AC Passthrough Current For Whole Home Backup
3 MPPT Output For Max. 21 KW PV Array
AC, DC And AC/DC Combined Coupling
IP65 Rated For Indoor & Outdoor Installation
Built-In Generator Input
10 Units In Parallel
Local And Remote Monitoring/App
Color LCD Touch Screen
Batch Settings
Supported Applications:
Backup
Off-Grid
Zero Export
Time-Of-Use
Peak Shaving
Demand Response Integration (Coming Soon)
Whole-Home Backup / AC Passthrough One-Line Diagram
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
Max. Continuous AC Current
50A @ 240V
Nominal AC Frequency
50Hz/60Hz
Output AC (Off-Grid)
Max. Output Power
12000W (240V)
Nominal Output Voltage
120/240, Single Split Phase, 120/208V Single Split Phase, 120/208V Three Phase
Nominal Output Frequency
50Hz/60hZ
Nominal Output Current
50A @ 240V / 50A @208V
Peak Power
14kW 10 minutes / 16kW 5 minutes / 20kW 500ms
Switching Time
Seamless
Battery Parameters
Compatible Battery Type
Lithium and Lead acid batteries
Nominal Battery Voltage
48V
Battery Voltage Range
48V-56V
Maximum Charging/Discharging Current
250A
Maximum Charging/Discharging Power
12000W
Efficiency
MPPT Efficiency
99.9%
Max. Efficiency
97.5%
CEC Efficiency
96.5%
Protection
Anti-islanding Protection
YES
DC Switch
YES
Ingress Protect Degree
NEMA 4X, IP65
SPD Protection
YES
AFCI
OPT
RSD
Built-in APsmart Transmitter
General Data
Dimensions
31.1 x 20.5 x 10.4 in (790 x 520 x 264 mm)
Weight
127 lbs (58 kg)
Display
Color LCD
Ambient Temperature Range
-20 to 60 °C (-4 to 140 °F)
Cooling
FAN
Communication
RS485/Wi-Fi/CAN
Standard & Certification
Certifications
UL1741, UL1741SB, IEEE1547A, Rule 21, ISO-NE, FCC15 class B, HECO, CEC, Luma, SGIP, NOM
Warranty
10 Years
Product Manuals
Envy True 12 kW Inverter – Data Sheet
Envy True 12 kW Inverter – Manual
Fortress Power System Design Tool
OGPe Certification
NOM Certification
ENVY 12KW UL1741 SB 3RD Ed. ATM
ENVY-eVault Max UL9540 3RD Ed.
Product Warranty
Envy True 12 kW Inverter – Warranty Letter
Product FAQs
Fortress Power Product FAQs
1) Does energy storage work well with my solar system?
Yes. On the grid? Absolutely! Energy storage adds a lot of value to your solar systems. It keeps your solar system operating when your utility service is interrupted. Without energy storage, your PV system will be forced to shutdown when the grid is off.
If you live off grid, energy storage enables you to use the clean solar energy to power your home day and night.
Fortress Power also knows you’re a fan of conservation—energy storage saves both your surplus solar energy and your cash since it reduces on grid energy dependence.
2) Can I use energy storage without solar panels?
Absolutely. For on grid clients, a home energy storage unit stores energy from your electricity provider. If an outage occurs, home energy storage can provide up to 24 hours of potentially life-saving power. Need more reassurance? Fortress Power offers batteries with larger storage capabilities, completely customizable to your needs. And, like you, we appreciate saving money. When electricity is at its lowest daily rate, our smart energy storage units use that period to charge. When peak electric use occurs, our energy storage units can discharge power to suit your lifestyle.
3) What about power outage protection?
Power interruptions shouldn’t disrupt your schedule. An energy storage system will keep your solar system operating during grid outages. When paired with solar panels, an energy storage system supplies unlimited energy delivery. The solar panels power your home during the day and use any excess power to charge the battery. At night, the system keeps your space bright. When used without solar panels, power outage support is dependent on battery size and your energy use. Batteries providing at least 12 hours of backup power are safest.
4) Are home energy storage systems financially beneficial?
You can use the energy storage to shelve your peak usage. When electricity is at its lowest daily rate, our smart energy storage uses that period to charge. During the peak periods, our energy storage system can power your home, reducing your electricity bill. Clients with solar panel installations enjoy a faster return on investment.
5) Do I receive incentives on my energy storage system?
If your energy storage is powered by solar panels, you are eligible for 30% federal tax credit. Many states and utilities provide rebates for homes and businesses with energy storage systems, aiming for grid resilience.
6) What is Lithium batteries lifespan?
We provide a 10 year product warranty and guarantee up-to 8000 cycles, whichever comes first. Speak to our representatives for details.
7) Why choose Lithium Iron Phosphate over Lithium Ion batteries?
We use Lithium Iron Phosphate (LiFePo4; Lithium Ferro Phosphate) technology – the safest lithium technology in the industry. It’s environmentally friendly and can be fully recycled. While Many other competitors, such as LG Chem, Tesla and Panasonic use cobalt-based Lithium-Ion battery, which has a very poor thermal stability. Any short circuit or cell-breakage can cause thermal runaway and catch fire.
And comparatively, Lithium Iron Phosphate battery deliver substantially higher amount of life cycles. We guarantee up-to 6000 cycles, while LG Chem, Tesla and Panasonic provide less than 3000 cycles.
8) Are Fortress Lithium batteries widely compatible?
Yes, our batteries are designed to work with all 48V chargers and hybrid inverters. We work well with Schneider, Outback, Magnum, Sol-Ark, Victron, Morningstar and so on. Please Check out our Inverter Compatibility list.
9) Are permits required for installation?
Legal requirements vary by location. Fortress Power’s technical support team will help you on obtaining permits.
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