Rooftop PV power system is a system that converts sunlight into electricity through solar panels, which is based on the working principle of photovoltaic effect. It converts light energy into direct current (DC) through solar panels, which is then converted into alternating current (AC) by an inverter for use in the power grid. In this process, photons (sunlight) are absorbed by the photovoltaic cells and trigger the movement of electrons to produce electricity. Unlike conventional energy sources, there is no combustion or nuclear reaction during PV power generation, so no harmful gases or radioactive substances are produced.

Some people may confuse rooftop photovoltaic power generation with nuclear power generation, which does produce radiation. However, these are two completely different technologies; photovoltaic power does not involve a nuclear reaction and therefore does not produce any nuclear radiation.

In addition, solar panels are usually made of silicon, which is a semiconductor material. Silicon is widely used in photovoltaic applications and is considered an environmentally friendly material with no negative impact on human health. Photovoltaic power generation systems do not emit harmful gases or produce radioactive waste.

It is important to note that, although Solar systems do not produce radiation, there are a number of safety issues related to electrical energy that require special attention during installation and maintenance. For example, there is a need to ensure that direct exposure to solar panels is minimized in order to avoid exposure to light and heat radiation from their surfaces to the human body. The DC end of the system's connecting wires needs to be properly grounded to prevent the risk of electric shock; for solar roof installations, safety regulations should be followed and appropriate personal protective equipment used. Safety measures need to be taken to ensure the safety of construction and maintenance personnel.