Wind and solar energy face serious curtailment problems, with surplus power unable to be stored and utilized in a timely manner, causing energy waste.  lead-acid batteries standby energy storage systems effectively solve this problem by absorbing and storing surplus photovoltaic and wind power in real time to reduce energy loss. They release power during peak electricity consumption and low power generation to balance supply and demand and improve comprehensive energy utilization. Their stable discharge characteristics optimize power quality, improve grid connection stability of wind-solar power and reduce grid impact. With high adaptability and economy, they are core supporting equipment for small and medium-sized wind-solar energy storage projects.