Solar Energy and Solar Panels Efficiency



WHAT SOLAR ENERGY IS:  In order to understand what solar panels are made for, it is proper to begin by explaining solar energy. In brief, solar energy is the energy from the sun. The sun is an important renewable source of energy. The energy from the sun performs several tasks that meet man’s need. For instance, in the drying of clothes, and in agriculture, solar energy is optimally in use.  The importance attached to solar energy makes it necessary for researches to be made. One of these researches is the invention of the solar panels.

About the solar panel: The solar panel is equipment used in the generation of electricity by trapping the   sun-light and converting it. The solar panel is able to make this conversion through the help of the solar cells which is incorporated in it.  There is always a high yield of conversion whenever the intensity of the sun’s light is great. Solar panels do not generate the same amount of electricity. This accounts for the difference in efficiency experienced in solar electricity generation.

What is solar panel’s efficiency? The solar panel’s efficiency is the extent to which a solar panel can transform available light from the sun’s rays into electricity.
It can also be defined as the ratio of the electricity produced to the amount of solar energy present. For example, if a sun provides about 1,500W of power and the solar panel produces about 250W of electricity, then the efficiency will be approximately 17%. Generally, solar panels have efficiency between the ranges of 6% and 20%. The 6% efficient solar panels are made of thin films. This makes them a cheaper option. However, they are very efficient when the atmosphere is cloudy or very hot.  The more efficient solar panels are those made of crystalline silicon. Crystalline silicon is used to boost efficiency to about 20% when used with thin films.

The efficiency of solar panels also depends on the times and seasons. When direct current produced by the panels is converted by the use of an inverter, the efficiency falls by about 15%. So if just 20% efficiency was achieved, only 5% will become available for the home. And if bulbs and tubes are to be lit, it may not be surprising to note that there will be little or no more energy for other appliances. For this reason, solar panels are not used to light bulbs and tubes. Fortunately, the efficiency can be stepped up by combining several solar panels when there is a high need to perform lots of tasks with energy.

Before buying solar panels, it’s important to first define all the tasks that will be done with it. If there’s little task to be done, such as lighting the homes or heating water or just watching the television, then a low efficient one such as 10% can be used. There will be no need going for high efficient ones when there are no many jobs to be done. After all, there also has to be efficiency in saving and spending wisely.