Fogstar Energy IP65-Rated 48V 48.3kWh Modular Battery Stack
Stock update: The next batch is due in February 2027. Existing orders are unaffected and will ship on their original date.
The Fogstar Energy 48.3kWh Battery Stack is a 51.2V LiFePO₄ storage system for residential, commercial and light industrial installs, built from modules that are easier to handle on site.
The stack is made up of three (3) separate 16.1kWh battery modules that sit on a dedicated base plate. A control unit mounted on top runs all three modules as one battery, so the inverter sees a single system. The IP65 enclosure, integrated heating and built-in fire suppression make it suitable for demanding locations.
Key Features
Modular Build
Three 16.1kWh LiFePO₄ modules, making the system simpler to lift, install, service and expand.
Battery Management
An integrated BMS controls and protects the whole stack and supports high-power operation.
Inverter Compatibility
CAN and RS485 communication, with protocols for LuxPower, Sunsynk, Solis, Victron, Voltacon and more.
IP65 Enclosure
Sealed against dust and moisture for indoor or outdoor installation.
Fire Suppression
A heat-triggered aerosol unit inside the enclosure activates automatically, with no maintenance needed.
Low-Temperature Operation
Built-in heating allows safe charging in the cold and operation in ambient temperatures down to –20°C.
Active Balancing
A 2A JK active balancer keeps cell voltages equalised for better efficiency and a longer service life.
High Output
51.2V (48V) LV system suited to high-demand inverters and large backup or off-grid systems.
Warranty & Support
6-year warranty with 10 years of UK-based customer support.
LCD Touchscreen
On-board display for live monitoring and system set-up.
System Breaker
A 350A breaker isolates the complete stack for maintenance, faults or emergencies.
Module BMS
150A SEPLOS BMS in each module for dependable protection.
How the 48.3kWh System Fits Together
Three (3) 16.1kWh modules stack on the base plate, with the control unit on top managing them as one battery. This keeps commissioning, monitoring and maintenance straightforward.
A single stack can take up to four modules (64.4kWh), and multiple stacks can be connected in parallel for up to 1.28MWh, so the system can grow in phases as demand increases.
48.3kWh Technical Specifications
Rated Energy: 48.3kWh
Nominal Voltage (V): 51.2V
Operating Voltage (V): 43.2V – 57.6V
Cycle Life: 8,000 cycles at 91% DOD
Configuration: 3 × 16S1P (three 16.1kWh modules)
Operating Temperature: Charge 0 – 45°C (with heating). Discharge –20 – 45°C
Maximum Discharge Current: 300A
Maximum Charge Current: 300A
Capacity: 942Ah
Weight: 394kg
Dimensions: 830L x 450W x 949H mm
Communications: CAN / RS485
Ingress Protection: IP65
In the Box
Pre-terminated 95mm² power cables are supplied, for connecting the stack straight to the inverter or through an external busbar.
Module-to-module cables use Amphenol connectors for secure, low-resistance links.
A 1.5m communication cable is included for system control and data.
The power cables suit most inverters. Some installs may need the battery cables taken to a busbar, with the inverter manufacturer's leads used for the final connection. Always make all negative connections before the positive.
➡️ Download Specification Sheet
➡️ Download User Manual
➡️ Download Installation Wiring Guide
➡️ Download Warranty Booklet