The 2V100Ah valve-regulated lead-acid batteries is the core energy storage device for small and medium-sized off-grid photovoltaic systems with stable performance. Adopting AGM sealing technology, it features no acid mist overflow and maintenance-free operation, adapting to complex outdoor environments and reducing project construction costs. It efficiently stores solar energy in the daytime and supplies power continuously at night or on rainy days, solving unstable power supply problems in off-grid areas. With excellent cycle performance and high charge acceptance, it adapts to low-voltage photovoltaic charging conditions, widely used in rural independent power supply and field monitoring photovoltaic power supply scenarios.