2007-01-16 09:07:12 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
The most glaring and overlooked disadvantage to solar energy is the deprivation of sunlight to plant life (and people)
it is a green source of regenerable energy - this is main advantage and quite important these days, does not consume any resources thus once built a photovoltaic plant is very cheap to maintain.
disadvantages:
- you only can get a max of 1000W/m^2 - this is what our Sun offer, with 20% efficiency means 200W/m^2;
- you don't have any energy at night, and bad weather will decrease the output.
- instalation cost are still high. for a photovoltaic plant of 1MW, 1kWh cost about 3euro. for a 20kW you get 10euro per 1kWh
- big power output imply huge surfaces (because of the first "-")
Overall it is a new technology, still in development, but with a huge growth in last years. If you think 20% is to less, remember that combustion engine is ~15%. NASA use solar cell with 40% efficiency but those are to expensive for now.
>You can put it on top of buildings (usualy done) so none is deprived of sunlight.
2007-01-16 09:35:33 · answer #1 · answered by bily7001 3 · 0⤊ 0⤋
The advantage is that once you have built the system, it's cheap. The disadvantages are: clouds; darkness; and the considerable cost of the system. A solar electric system costs about $10 a watt to install, and under optimum conditions can generate two kilowatt hours of electricity per year, which is worth about 25 cents. Unless you can get big subsidies (which are available in some places), you'd be better off leaving your money in the bank.
2007-01-16 09:14:10 · answer #2 · answered by Anonymous · 1⤊ 0⤋
The most glaring and overlooked disadvantage to solar energy is the deprivation of sunlight to plant life (and people)
2007-01-16 09:30:53 · answer #3 · answered by Helmut 7 · 0⤊ 1⤋
Advantage - No real emissions produced (other than those associated with building the facility to start with.
Disadvantages - High total cost
Low reliability (night, clouds, etc).
2007-01-16 09:36:22 · answer #4 · answered by Anonymous · 1⤊ 0⤋
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2014-08-06 05:09:17 · answer #5 · answered by Anonymous · 0⤊ 0⤋
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2017-03-30 02:30:35 · answer #6 · answered by Quentin 3 · 0⤊ 0⤋
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2014-07-20 11:32:03 · answer #7 · answered by Anonymous · 0⤊ 0⤋