The Fogstar Energy 48.3kWh Modular Battery Stack is a high-capacity LiFePO₄ energy storage solution designed for residential, commercial and light industrial applications.
Each stack is built from three (3) 16.1kWh battery modules, making installation, handling and future expansion significantly easier. A single top-mounted control unit manages the entire stack as one integrated system, underpinned by a battery base plate.
Multiple stacks can be connected in parallel, allowing the system to scale from a single 48.3kWh stack up to a full 1.23MWh system if required. With an IP-rated enclosure, integrated heating and built-in fire suppression, the system is engineered for safe, reliable operation in demanding environments.
Key Features
48.3kWh per Stack
Each stack provides 48.3kWh of total energy, assembled from three 16.1kWh LiFePO₄ battery modules for easier installation and servicing.
Advanced Battery Management System
An Integrated BMS delivers precise control, comprehensive protection and long-term system reliability, with support for high-power operation.
Simple Integration with Major Inverter Brands
CAN and RS485 communication enable seamless integration with popular inverter brands, including Victron, LuxPower, Sunsynk, Solis, Voltronic, Voltacon and more.
Scalable Energy Storage
Scales from a single 48.3kWh stack up to a full 1.23MWh system if required.
IP65-Rated Construction
Robust, sealed enclosure protects against dust and moisture, making the system suitable for indoor and outdoor installations.
Integrated Fire Suppression
Built-in, heat-activated aerosol fire suppression system provides fast, automatic internal protection with no ongoing maintenance.
Cold-Weather Ready
Integrated heating system enables safe charging at low temperatures and reliable operation in ambient conditions down to –15 °C.
JK Active Cell Balancing
2A active balancing continuously equalises cell voltages, improving efficiency, stability and overall battery lifespan.
High Output Performance
LV 51.2V (48V) system designed to support high-demand inverters and large backup or off-grid installations.
Long-Term Peace of Mind
Backed by a 6-year warranty and 10 years of UK-based customer service support.
User-Friendly Interface
LCD touchscreen for real-time monitoring and system management.
Built-in Breaker
The 350A breaker allows the entire system to be safely isolated during faults, maintenance, or emergency conditions.
System Overview
Each 48.3kWh stack is assembled from three (3) 16.1kWh battery modules housed within a single enclosure. Once stacked, a top-mounted control unit manages all modules as one unified battery system, simplifying commissioning, monitoring and maintenance.
The modular design allows additional stacks to be added at any stage, making the system ideal for phased installations or growing energy requirements.
Product Specifications
Rated Energy: 48.3 kWh
Model: FE51.2-48.3
Nominal Voltage (V): 51.2 V
Operating Voltage (V): 43.2 V – 57.6 V
Cycle Life: 8,000 cycles at 80% DOD
Configuration: 3 × 16S1P (three 16.1kWh modules)
Working Temperature: 0 – 45 °C Charge (with heating) and –20 – 45 °C Discharge
Maximum Discharge Current: 300 A
Maximum Charge Current: 150 A
Capacity: 314Ah
Weight: 394kg
Communications: CAN / RS485
Ingress Protection: IP65
What's included?
The system is supplied with pre-terminated 95 mm² battery power cables for straightforward installation. These enable direct connection between the battery system and inverter, or via an external busbar where required.
Battery to battery cables are terminated with Amphenol connectors for secure, low-resistance connections.
A 1.5 m communication cable are also supplied to enable system control and data integration.
The supplied power cables are compatible with most inverter systems. In some installations, battery cables may be routed to a busbar, with manufacturer-supplied inverter leads used for the final connection. For correct installation, all negative connections must be made before connecting the positive.