The 12V65Ah lead-acid batteries is a mainstream choice for small distributed energy storage systems, adapting to intermittent power supply scenarios of photovoltaic and wind energy. Strictly control the discharge depth within 80% under normal working conditions to avoid plate damage caused by deep discharge. Install a current sharing module for parallel connection to control the current difference within 3% for balanced charging and discharging. Adopt 14.4V equalizing charging mode, and turn on the charging preheating function in low temperature environments. Conduct annual capacity tests and replace severely attenuated batteries timely to ensure the overall stability of the energy storage system.