Question

how do we get more energy from Sun

Answer 1

sun is one of the main SOURCE of energy...
there are many useful effects of the energy of the sun.
it gives us vitamin D which is the main source of our physical energy..
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Answer 2

Well, I don't know what you mean by "More Energy" from the Sun. The amount of energy from the Sun reaching the Earth (outside the atmosphere) is about 1350 Watts per square-meter. This is known as the Solar Constant. On an average, we are probably using about 1/10,000 of that amount for our total energy consumption.

But if you mean "More efficient use of the Sun's energy" that would be different. Right now, the solar industry is bursting at the seams, as it were. Germany is one of the world’s most prolific users when it comes to photo-voltaic modules. There are more solar cells installed on roofs and buildings than anywhere else in the world. And the percentage of solar energy in the electricity consumption is set to almost quadruple between now and 2020. If everything goes according to the plans of the German government, the country’s last nuclear power plant will be decommissioned in 2022. As a result, renewable energy sources must make an increasing contribution to the power supply.

It is estimated that less than one percent of the Earth's total area can supply power to the entire planet.

In fact, there was a proposal called DESERTEC - for, afterall, deserts are ideal for generating solar power, and indeed – such plans were conceived in 1913 (by American engineer Frank Shuman), and again explored in 1986 (by German particle physicist Gerhard Knies). Desertec is a set of plans for a massive network of solar and wind farms stretching across the SAHARA and intended to connect to Europe via high voltage direct current transmission cables (which are supposed to only lose 3% of their electricity per 1000km). The initiative came from Germany, but there are 15 different nationalities involved. Therefore the plan remains a dream even today.

Right now, the efficiency of readily available solar panels is around 20% (solar panels convert 22% of the available energy into electrical power) - and they are expensive. Researchers are looking into two aspects - (a) to make them more efficient and (b) to make them more economical.

Solar water-heaters were unheard of - about fifty years ago - but now nearly every home in a city has one on the roof. Similarly, a time will come when every home will use solar panels to generate electricity.

I live in a village; I use solar power to run my home.