There is nothing wrong with using electricity to boil water with solar water heaters.

There are some differences between solar energy and electric water heating.

Electric water heaters can boil water, but solar power generally cannot heat water to 100 degrees (if you insist on boiling water, there is no there is no other way).

Solar energy is mainly used for bathing. If the water used for bathing is around 50 degrees, there is no need to heat it too high.

If you insist on using solar energy to boil water, the disadvantages are:

First, the lifespan of solar electric heating will be shortened

Second, it's a waste of electricity;

Three possibilities can burn your solar energy.

The amount of water a solar water heater can heat per day depends on the capacity of the solar energy. The capacity of solar water heater varies from more than 100 kilograms to several tonses or tens of tons. as long as there is enough sunlight, the water can be heated in a day. The stronger the light intensity and the longer the lighting duration, the more hot water will be burned by solar energy