Fortress Power eFlex Max 5.4, 51.2V Lithium Battery (105Ah | 5.4kWh)
Fortress Power eFlex Max 5.4, 51.2V Lithium Battery (105Ah | 5.4kWh)
Description
Wallmount and Busbar are not included
Discover the power and flexibility of the eFlex MAX 5.4 LFP Battery, designed to provide you uninterrupted power in the most demanding environments and weather conditions. This top-tier lithium battery combines advanced technology with practical design to meet a wide range of energy needs while ensuring utmost safety and reliability.
8000 cycles guaranteed, 10-year warranty and the highest quality standard, make it perfect for both your home, apartment and condos, off grid cabins, RVs, boats and more.
Key Features
Robust Design with Salt Water-resistant Aluminum Enclosure – designed for both indoor and outdoor use without extra protective structures.
Longest Battery Life Span (8000+ cycles; 10+ year) – The patented 3/4″ aluminum enclosure design regulates the battery’s internal temperature high-power applications, resulting in 3 times greater thermal performance than competitors and extended life span.
99% Efficiency with 2W Idle Power – Enhanced Performance in Off-Grid Systems with 2W consumption, minimizing power loss in standby mode and resulting in cost savings.
Easy to Scale-up Battery Capacity to Match Your Energy Need – included Busbars enable faster installation of multiple units in parallel with fewer errors, handle higher power current than battery cables.
Clean, Streamlined and flexible Installation The waterproof front battery cover eliminates the extra wire management (such as conduits). Both Wall mount and floor mount are available.
Best Bang for Your Buck – Obtain lowest energy cost with best battery technology and product quality, highest performance and affordable price point.
Product Specifications
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% |
Includes: Top Cover, Busbar, and Threaded Conduit Fitting
Product Manual
eFlex MAX Datasheet
eFlex MAX Owner / Installation Manual
eFlex MAX Warranty Letter
Product Warranty
eFlex Warranty
Product FAQs
Fortress Power Product FAQs
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.
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.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Fortress Power eFlex Max 5.4, 51.2V Lithium Battery (105Ah | 5.4kWh)
Description
Wallmount and Busbar are not included
Discover the power and flexibility of the eFlex MAX 5.4 LFP Battery, designed to provide you uninterrupted power in the most demanding environments and weather conditions. This top-tier lithium battery combines advanced technology with practical design to meet a wide range of energy needs while ensuring utmost safety and reliability.
8000 cycles guaranteed, 10-year warranty and the highest quality standard, make it perfect for both your home, apartment and condos, off grid cabins, RVs, boats and more.
Key Features
Robust Design with Salt Water-resistant Aluminum Enclosure – designed for both indoor and outdoor use without extra protective structures.
Longest Battery Life Span (8000+ cycles; 10+ year) – The patented 3/4″ aluminum enclosure design regulates the battery’s internal temperature high-power applications, resulting in 3 times greater thermal performance than competitors and extended life span.
99% Efficiency with 2W Idle Power – Enhanced Performance in Off-Grid Systems with 2W consumption, minimizing power loss in standby mode and resulting in cost savings.
Easy to Scale-up Battery Capacity to Match Your Energy Need – included Busbars enable faster installation of multiple units in parallel with fewer errors, handle higher power current than battery cables.
Clean, Streamlined and flexible Installation The waterproof front battery cover eliminates the extra wire management (such as conduits). Both Wall mount and floor mount are available.
Best Bang for Your Buck – Obtain lowest energy cost with best battery technology and product quality, highest performance and affordable price point.
Product Specifications
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% |
Includes: Top Cover, Busbar, and Threaded Conduit Fitting
Product Manual
eFlex MAX Datasheet
eFlex MAX Owner / Installation Manual
eFlex MAX Warranty Letter
Product Warranty
eFlex Warranty
Product FAQs
Fortress Power Product FAQs
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.
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.
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.
