| 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 |
| DC Input Voltage Range |
100V-600V |
| Nominal DC Input Voltage |
360V |
| Full Power MPPT Voltage Range |
230V-500V |
| Max. DC Input Current |
25A/15A/15A |
| MPPT Number/(Strings per MPPT) |
3(2/1/1) |
| 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 |
| 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 /Ā 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 |
Fortress Power eFlex Max 5.4, 51.2V Lithium Battery (105Ah | 5.4kWh) Product Specifications
| General |
| Name |
eFlex MAX 5.4 |
| Total Energy(kWh) |
5.4 |
| Max. Charge Current (Continuous) [A] |
100 |
| Max. Discharge Current (Continuous) [A] |
100 |
| Nominal Capacity [Ah] |
105 |
| Voltage Range [V] |
48-55 |
| Charging Temperature [F] |
32 ~ 114 |
| Discharging Temperature [F] |
-4 ~ 131 |
| Storage Temperature [F] |
20 ~ 95 |
| Dimension [L x W x H, inch] |
17.5 x 24.2 x 7.2 |
| Weight [lbs] |
108 |
| Life Cycles |
8000 @ 80% DoD |
| Round Trip Efficiency |
>98% |
Fortress Power Guardian Battery Monitor Product Specifications
| Feature |
Specification |
| Power Consumption |
5W ā 24V @ 1A power supply |
| AC/DC Adapter |
120V / 5A, 24V DC, 5.5mm connector |
| Supported Communication Types |
1x MODBUS/TCP, 2x MODBUS/RTU, 2x CAN 2.0 |
| Operation Frequency |
2.4 GHz |
| Weight (Device Only) |
0.8 lbs (0.4 kg) |
| Dimensions (Device Only) |
7.25" x 6" x 1.25" (WxHxD) |
| Shipping Package Dimensions |
14" x 8.5" x 2" (WxHxD) |
| Shipping Package Weight |
2 lbs |
| Housing |
IP23 |
| Mounting System |
DIN Rail Mount |
| Status Display LEDs |
Power, Cloud connection, Bluetooth/Wi-Fi connection, Serial communication with battery, Error signal (from top to bottom) |
Product Manual
Envy 12 Product Manual
Envy True 12 kW Inverter ā Data Sheet
Envy True 12 kW Inverter ā Manual
Fortress Power System Design Tool
OGPe Certification
NOM Certification
ENVY 12KW UL1741 SB 3RD Ed. ATM
ENVY-eVault Max UL9540 3RD Ed.Ā
eFlex Max Product Manual
eFlex MAX Datasheet
eFlex MAX Owner / Installation Manual
eFlex MAX Warranty Letter
Guardian Product Manual
Fortress Power Guardian Product Manual
Product Warranty
Envy True 12 kW Inverter ā Warranty Letter
eFlex Warranty
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 youāre a fan of conservationāenergy 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 homeĀ energy storage unitĀ Ā stores energy from your electricity provider. If an outage occurs, homeĀ energy storage canĀ 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, ourĀ smartĀ energy storage unitsĀ use that period to charge. When peak electric use occurs, ourĀ energy storage unitsĀ can discharge power to suit your lifestyle.
3) What about power outage protection?
Power interruptions shouldnāt disrupt your schedule.Ā An energy storage system will keep your solar system operating during grid outages.Ā When paired with solar panels, anĀ energy storageĀ 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, theĀ systemĀ 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 smartĀ energy storageĀ uses that period to charge. During the peak periods, ourĀ energy storage systemĀ 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.
We provide a 10 year product warranty and guarantee up-to 8000 cycles, whichever comes first.Ā Speak to our representatives for details.
We use Lithium Iron Phosphate (LiFePo4; Lithium Ferro Phosphate) technology ā the safest lithium technology in the industry. Itās 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 workĀ with all 48VĀ chargers and hybrid inverters.Ā We work well with Schneider, Outback, Magnum, Sol-Ark, Victron, Morningstar and so on. Please Check out ourĀ Inverter Compatibility list.
9) Are permits required for installation?
Legal requirements vary by location. Fortress Powerās technical support team will help you on obtaining permits.