SOLAR adopts the newly developed Nano colloid technology and high-density polar plate structure, and with low-density electrolyte density, the overall performance is excellent and the life span is long. This series of batteries have excellent over discharge resistance and can still ensure high charging efficiency at lower temperatures. Nanocolloid technology can greatly reduce the stratification effect of electrolytes and improve the stability at high and low temperatures. The SOLAR series is particularly suitable for energy reserves as a renewable energy system, such as solar systems, wind energy systems, etc..