1. Photovoltaic energy production involves converting light energy directly into electrical energy. The key is light. The light at night is too dim, so it cannot generate electricity. Even if there is light on a cloudy day, it cannot be used to generate electricity. Photovoltaic energy production must therefore be equipped with batteries and inverters. At night and on rainy days, batteries and inverters are used to provide electricity.
2. Wind power also has this problem. When there is no wind or the wind is too weak, batteries and inverters should be installed.
3. Theoretically, “photovoltaic power generation” uses optoelectronic devices to convert light energy into electrical energy. As long as a photon is incident, it converts the photon's energy into electrical energy (emits the same energy). Like ph energyotonic is equivalent to electrical energy; At night, as long as there are still photons (it doesn't matter if people can feel it) shining on the optoelectronic device, there should still be electrical energy generated. the photons are too small and the energy value is too small, it can't even be measured, we think it's just because there is no electricity
4. A calculator powered entirely by photovoltaic cells will normally operate for that long. because the light intensity is sufficient at night.
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