SOLAX 5.1 kWh LFP Battery Module, Stackable, 90% DoD, >6000 Cycles, IP65, Heating Mats, Fire Suppression

The SOLAX 5.1 kWh LFP Battery Module is a high-performance, modular energy storage solution designed for residential and commercial solar systems. With a nominal energy capacity of 5.1 kWh and a usable capacity of 4.6 kWh, this lithium iron phosphate (LFP) battery offers exceptional safety and longevity. It features a 90% depth of discharge (DoD) and over 6000 cycles at 25°C, ensuring reliable performance for years. The stackable design allows up to 4 modules per system, providing scalable storage from 5.1 kWh to 20.4 kWh. Integrated heating mats enable operation in temperatures as low as -20°C, while the IP65 rating protects against dust and water ingress. An integrated fire extinguishing agent adds an extra layer of safety. The battery includes an intelligent BMS with CAN/RS485 communication, making it compatible with high-voltage inverter systems.

Advantages

This battery module offers several key benefits: long cycle life (>6000 cycles) reduces replacement costs; high DoD (90%) maximizes usable energy; wide operating temperature range (-20°C to 53°C) ensures functionality in harsh climates; IP65 protection allows outdoor installation; integrated heating mats enable cold-weather charging; and built-in fire suppression enhances safety. The modular, stackable design simplifies expansion, and the integrated BMS optimizes performance and protects against overcharge, overdischarge, overcurrent, and overtemperature.

Suitable for

• Residential solar energy storage systems
• Commercial and industrial backup power
• Off-grid and hybrid solar installations
• Peak shaving and load shifting applications
• Systems requiring scalable, high-voltage battery storage

Key specifications

• Battery Type: Lithium Iron Phosphate (LFP)
• Nominal Energy Capacity: 5.1 kWh
• Usable Energy Capacity: 4.6 kWh
• Nominal Voltage: 102.4 V
• Max. Depth of Discharge: 90%
• Cycle Life: >6000 cycles (at 90% DoD, 25°C)
• Operating Temperature Range: -20°C to 53°C
• Ingress Protection: IP65
• Thermal Management: Integrated Heating Mats, Natural Convection Cooling
• Scalability: Modular, Stackable (up to 4 modules per system)
• Communication Interface: CAN / RS485
• BMS: Integrated Intelligent BMS
• Safety Features: Integrated Fire Extinguishing Agent, Overcharge/Discharge Protection, Overcurrent Protection, Overtemperature Protection
• Max. Charge/Discharge Current: 50 A (Continuous)
• Peak Power Output: 5.12 kW (Continuous)
• System Compatibility: High Voltage (HV) Inverter Systems
• Installation Type: Floor-standing
• Enclosure Material: Die-cast Aluminum

Recommendations

For optimal performance, pair this battery module with a compatible SOLAX high-voltage inverter. Ensure proper ventilation and follow installation guidelines for stacking modules. The integrated heating mats allow operation in cold environments, but avoid exposing the battery to temperatures outside the specified range. Regular monitoring via the BMS communication interface is recommended to maximize lifespan.