First, check which brand of solar power you have. If the product quality is good, solar energy has the function of heat insulation and will not freeze. If water cannot be put into solar energy, it. This is because the pipes are frozen. Wait for the pipes to thaw.
Some solar energy has an electric heating system, and some solar energy does not. If your solar has an electric heating system, turn it on. pipeline anti-freeze setting, and water will flow from solar energy