Extreme Cold Environments Battery Protection-- The low-temperature charging protection feature automatically disconnects charging when the KINGBOSS 12V 100Ah LiFePO4 Battery's temperature drops below 32°F (0°C), with charging resuming at 41°F (5°C). Additionally, it automatically cuts off power at -4°F (-20°C) to further safeguard the battery. Prevent Damage or Hazardous Situations--The smart 100A BMS provides comprehensive protection against overcharging, over-discharging, overcurrent, overheating, and short circuits, along with dust resistance, IP65 waterproofing, and salt spray resistance. The upgraded low-temperature charging protection further enhances battery safety. Designed for harsh environments, including rain, marine conditions, dusty or humid settings, and extreme cold.Perfect for RVs, Solar System, Off-Grid, Yacht, Marine, Boat, Vans, Motorhomes, Home Backup Energy, etc.