How often should you add solar antifreeze?

2 years. Solar antifreeze will gradually decrease for various reasons during use. For example, when using solar water heaters, the liquid level will gradually drop due to continued evaporation of hot water or leaks at pipe connections and inside the water tank. water. . This results in a loss of antifreeze. At this time, the antifreeze should be replenished in time to maintain its normal use. Therefore, adding solar antifreeze once every two years can prevent it from becoming ineffective due to evaporation or leakage during long-term use, causing problems with solar equipment.