Myth: Solar PV Plant does not generate power during monsoons

A common conception is that Solar PV plants or solar rooftop plants do not perform optimally during the monsoon season. Well, it is not as linear or simple as it sounds. In some cases, rooftop solar plants perform better in the monsoons than in the summer season! Let's try to figure out why this happens.

Solar water heaters absorb the heat energy from our sun and thus during monsoon there is little or no hot water, generating the myth that solar rooftop plants cannot perform well during monsoons. Important thing is, rooftop solar plants absorb the light energy from our sun, and even during the monsoon season that energy is sufficiently available.

The most important factor that hampers solar power generation is the dust collected on the solar panels. During monsoon season, the rainwater helps keep solar panels clean which in return have the ability to generate more power than it does during summer season in case the panels are not clean!

Another major factor which reduces the generation from rooftop solar plant is the heat, in monsoon which is very low. 25deg C, is the optimal temperature (differs from panel to panel) at which the output of the solar panel is maximum. Thus as all the requirements to generate maximum solar power output are met, solar power plants generate high power even during the monsoons! Just ensure that your lighting arrestor earthing resistance is within the range so that lighting strikes won’t affect your rooftop solar plant.

The high efficiency mono-perc and 1/3rd cut solar panels further increases the output even during the cloudy conditions. Using Solaredge inverters with panel level optimisers along with the above mentioned MonoPERC solar panels, your solar plant generation during monsoon will be extremely high!

Understanding the PERC technology and why it helps in monsoon season:

Either Passivated Emitter and Rear Cell or Passivated Emitter and Rear Contact might stand for PERC. Simply said, a PERC solar cell is a more efficient solar cell, which means that solar panels with PERC cells can convert sunlight into useful electricity more efficiently. Solar Panels built using PERC solar cells often perform better in both low-light and high-temperature circumstances than conventional panels. PERC technology increases efficiency by adding a layer to the back of a conventional solar cell, which provides a number of benefits to the production of the cell.

What distinguishes PERC solar cells from conventional solar cells?

A PERC solar cell is constructed similarly to a conventional photovoltaic solar cell. Both types of solar technology employ silicon wafers to generate a flow of electrons using incoming solar energy, and the cell types' overall construction is extremely similar. The primary distinction between PERC cells and conventional monocrystalline photovoltaic cells is the incorporation of a back surface passivation layer, which is a layer of material on the back of the cells that gives three main advantages that increase cell efficiency.


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