2. The difference is that in the photovoltaic system, solar energy will be directly converted into electric energy, while in the thermal energy system, solar energy will be converted into heat energy, and heat energy will do work to generate electricity through a heat engine.
For ordinary families, the difference is not very big.
For large enterprises, cost and return need to be considered, so it is necessary to discuss the difference between them in detail.
5. Photovoltaic power generation is based on photovoltaic effect. When photons hit a special power generation board, electrons are generated.
6. Therefore, if there is enough light, current can be generated.
7. The principle of solar heating system is not so complicated. It uses light energy to generate heat, and uses heat energy as power to generate electricity.