After the solar water was drained, there was no water supply. The next day I discovered I could get

You should know that the solar meter has a water shortage alarm function. When you use less than 20% of the water, it will alarm and then refill the water if you don't plug in the meter and the water doesn't flow. fills automatically, your solenoid valve may not be closed properly. Well, the consequence of not sealing it tightly is that the water tank overflows. You can basically find the answer by checking if the water tank is overflowing.