EG4 LL-S Lithium Battery 12V 400AH UL 1973, UL 9540A

EG4 LL-S Lithium Battery 12V 400Ah (UL 1973, UL 9540A) The EG4 LL‑S Lithium Battery 12V 400Ah is a high-capacity lithium-iron-phosphate (LiFePO₄) energy storage battery designed for solar, off-grid, RV, and backup power systems. Operating at 12.8 V with a 400 Ah capacity, it provides 5.12 kWh of usable energy, making it ideal for large 12 V battery banks or systems requiring long runtime and high reliability. The battery uses 16 UL-listed prismatic LiFePO₄ cells and includes a 200 A internal Battery Management System (BMS) that protects against over-charge, over-discharge, over-current, short circuits, and temperature extremes. It is designed for 7,000 deep cycles at 80% depth of discharge, offering a long service life of up to 15–20 years with daily cycling. The LL-S features an integrated LCD screen for real-time battery monitoring and supports RS485/CAN communication for closed-loop integration with compatible inverters such as Victron and EG4 systems. Its modular rack-mount design allows multiple batteries to be connected in parallel, enabling scalable energy storage for residential or mobile power systems. Key Specifications Nominal Voltage: 12.8 V Capacity: 400 Ah Energy Storage: 5.12 kWh BMS Rating: 200 A Cycle Life: 7,000 cycles @ 80% DoD Communications: RS485 / CAN Weight: ~98 lbs Certifications: UL 1973, UL 9540A Parallel Capability: Multiple batteries for larger banks