Rainwater from photovoltaic solar panels is not harmful to the human body. There is no radiation risk in the photovoltaic power plant system. The components are mainly composed of silicon materials. There is no danger from radioactive elements.
The principle of solar photovoltaic power generation: solar photovoltaic power generation directly converts light energy into direct current through the characteristics of semiconductors, and then converts the current direct to alternating current which can be used by us via an inverter. There are no chemical changes or nuclear reactions, so there is no shortwave radiation in photovoltaic power generation.
About radiation: The meaning of the term radiation is very broad. Light is radiation, electromagnetic waves are radiation, party flowcules is radiation and heat is also radiation. So it is clear that we are exposed to all kinds of radiation.
What types of radiation are harmful to humans? What people generally call "radiation" refers to radiation that is harmful to human cells, such as that which causes cancer, and which has a high probability of causing genetic mutation. Typically contains shortwave radiation and some high-energy particle streams.
Correspondence between common radiation substances and wavelengths. Do photovoltaic panels produce radiation? For photovoltaic power generation, the power generation mechanism of solar modules is completely direct energy conversion. When converting energy in the visible light range, no further products are generated, therefore no additional harmful radiationis generated. Solar inverters are just general power electronic products. Although they contain IGBTs or transistors and have a switching frequency of tens of K, all inverters have metal shielding housings and comply with global electromagnetic compatibility regulations.