Generally speaking, solar water heaters do not have waterproof electronic circuits. During installation, the metal bracket of the water heater can be connected to the lightning protection grounding of the building. There is no need for separate lightning protection.
How can this be dangerous? Lightning protection in modern buildings is linked to the steel structure of the building. If this is also dangerous, isn't it also dangerous for us to live in the building?
As long as your home is not a minefield or the highest point in the area, there is no problem if the water heater is not grounded. One of the three prongs on the water heater (the long one in the middle is the safety ground) is safely grounded. Your home must install a leakage switch and there must be a safety ground wire in the distribution line.we. leaks, the ground wire acts to trip the leak switch. Protect people and equipment.
For solar water heaters, a lightning rod must be installed; the installation position of the lightning rod and lightning rod (down conductor) should be as far away as possible from the solar water heater and its bracket; the highest point (point) of the lightning rod should be able to hold the solar water heater at The safety protection angle is within the range of 60 degrees if the lightning rod and lightning protection strip (down conductor) are limited by the installation environment; conditions