Basically, the solar energy system is the process of
generating some energy into
electricity for being used at houses, offices, industries, and many more by capturing the sunlight as the source of energy. Some of people
in the world have been using it as alternative energy instead of fossil fuels
and coals. As we know, fossil fuels and coals are exhaustable and non-renewable
resources. If we use them frequently, they will definitely be depleted. According
to Oliver (2007), the fossil fuels only can be reproduced in the next 5 billion
years or more and we absolutely do not have much time to wait for that. This
case makes most of people concern about and then, they attempt to find another
energy in which could generate it into the electricity. Solar energy is the
best way to make it through and it can help everyone as the fossil fuels run
out. In the other side, the solar energy can be reproduced and recyclable. This
is the reason why most of people prefer use solar energy rather than another
energy. Although,
the solar energy system is renewable energy, but we oppose this motion, because
the solar energy brings more harm such as expensive, unable in unstable
weather, and unsafe.
One of disadvantages of solar energy is making of this thing
need a lot of money and absolutely it will make some economic problem. Let us
take some example, if we buy one solar panel which costs about USD 20, but in
this case, one solar panel is not much sufficient. At least, we need 10-20
panels to generate some energy
into electricity for one house only. So, it means that we have
to pay about USD 200 - 400 for all of them. Arccording to Whitburn ( 2012 ), the sun’s energy a solar
panel can convert into electrical energy is around 22%. This means that a
fairly vast amount of surface area is required to produce adequate electricity.
Three-quarters of the energy is being wasted, because the efficiency limit of a
solar cell is fundamentally limited by its material properties. The
semiconductor material in a solar cell can only absorb light with a certain
amount of energy which is called the band gap. However, Sunlight spans a range of energies.
Light with energy lower than the band gap cannot be absorbed by the solar cell,
and light with energy a lot higher than the band gap is more than the solar
cell can absorb. This excess energy is lost as heat. In silicon solar panels,
which are the most common, this fundamental limit is about 29%. Once assembled into a
panel, there are additional efficiency losses through various mechanisms.
Currently, the most efficient solar panels on the market make use of about 21
percent of the sun’s energy, and they are not cheap. High-efficiency silicon
cells are currently very expensive. Beside, only people who have much money could
afford it, but let us take a look another side, how can people which do not have
enough money can buy the solar panels?. It is impossible to them to have solar
panels after all.
In the other side, Solar
energy cannot be used in unstable weather, for example, when the day is
raining, we absolutely cannot produce the solar energy by using solar panel
properly because it only can capture a little sunlight or even not at all. Meanwhile, the
sun does not shine 24 hours a day. When the sun goes down or heavily shaded,
solar PV panels stop producing electricity. We know that, the solar panel will
not work properly if there is much less sunlight. Beside, we only can use the solar
panels in the day but not
in the night. So, that is why we have to charge the panels along the day in
order to can be used in the night. In this case, we may not use solar panels as
efficient as possible because of unpredictable weather.
Most of the photovoltaic panels are
made up of silicon and other toxic metals like mercury, lead and cadmium. These
compounds absolutely can create some infections to human life. There will be
diseases occur, such as hydragyria or mercuralism, minamata disease, poisoning,
and many others. Pollution in the environment can also degrade the quality and
efficiency of photovoltaic cells.
As conclusion, the solar
energy system brings more harm than good. Firstly, the manufacture
of solar panel is
expensive. It needs a lot of funds to make solar panels in order to generate some
energy into electricty. Secondly,
this
energy is unable to be used in unstable weather, it only can be
used in the day or when there is much sunlight to capture. So, it proves that
we cannot use this energy effeciently. Lastly, the solar panel is
unsafe, which means that it is dangerous to human life because
solar panel has photovoltaic panels which are made up of sillicon and other
toxic metals. These compounds will endanger the consumers. Considering to this
matter, we should not focus on development of solar energy system due to it
only can bring more harm to humankind. Beside, it can also cause economic problem.
This matter must be concerned by all countries because it will influence all
the sector entirely.
REFERENCE
Whitburn, G.
(2012). 13 Fundamental Advantages and Disadvantages of Solar Energy. Exploring
Green Technology. Retrieved June 2, 2014, from http://exploringgreentechnology.com/solar-energy/advantages-and-disadvantages-of-solar-energy/
Oliver, R.
(2007, November 13). . CNN. Retrieved June 2, 2014, from http://edition.cnn.com/2007/WORLD/asiapcf/10/01/solar.energy/#cnnSTCText
Written by Akbar Haqi
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