A thick layer of snow will block the sunlight from reaching the PV cells and prevent them from working until it is removed (or eventually melts). However, a small amount of snow should melt away or blow away, meaning that solar panels can still be used in snowy environments.

And Heated solar panels with snowfall sensors have been developed on the market and automatically heat and melt snow.

Most common solar panels last for between 25 and 30 years, offering decades of use. However, technological advances, self-cleaning coatings, and other innovations could see the effective life of solar panels increase further.

Solar panels are at their most efficient when the Sun is at its highest in the sky and when the weather is clear and sunny. This means that, for most places, they are at their most efficient around noon. However, the exact hours when solar panels will work depends on where you live and what time of year it is as, the longer the daylight lasts, the more hours can be spent generating power.

Solar panels work by harnessing the energy of sunlight to create energy, it also can generate electricity under some low light, but due to continuous rainy or hazy weather, the irradiance of sunlight is low, and the system reduces the power generation capacity. Average figures for solar panel power generation during monsoons show that solar panels generate 30-50% of their optimum generation on cloudy days and 10-20% in heavy rain.

The grid-connected power generation system and the national grid are operated together. When the PV system cannot meet the needs of the load, the electricity from the national grid will be automatically replenished, and there is no problem of power shortage and power cut.