The solar water heater is full, only enough for one person to wash. What's the matter?

This must be that the instrument or water level probe is broken (and this will happen even if the probe is inserted too deep)!

Simple method detection: pump a bucket of water, take out the solar probe, slowly put the probe in, and it is good to see that the water level changes normally.

Generally, 20 tubes can be used by three people, and it would be better if there is electric heating.

A switch of solar energy is broken. Just change it again.

Mainly depends on the amount of hot water. 1 person washes for half an hour, which is more than two people washing for 10 minute.

Because there is too much water or small capacity, the weather is bad and the water is not hot enough.