People have been using the sun’s energy for thousands of years, through a range of constantly evolving techniques designed to capture and harness light and heat. Alongside wave and wind power, solar radiation and solar energy represent the greatest potential for limitless renewable energy on the planet and technology is constantly adapting to enable us to do exactly that.
The ways that we can currently harvest energy from the sun can be split into three main categories. The first two methods are known as passive solar energy and active solar energy and are used for things like the heating of space and water. The third method, also technically an active solar energy use, is to convert sunlight into electricity through the use of photo-voltaic (pv) cells and solar panels. Of all three types, photo-voltaic solar panels are the technology that offers the best hope for dealing with the issues of global warming and peak oil, and are also the technology that can mean the best savings and most effective energy creation for families willing to invest in them.
When it comes to using pv solar panels, UK customers nearly always ask if the changeable climate (to put it nicely) which we experience here means solar panels might not be worth installing. The answer is that there is more than enough energy coming through to make solar panels worth it. The earth’s atmosphere, land and oceans absorb something in the region og 3,850,000 exajoules of solar energy every year. Without wading into the numbers, that means that the sun sends us more energy in one hour than the world uses collectively in one year. Or to put it another way, the quantity of solar energy available to the planet in one year is approximately double the amount of energy that will ever be harnessed from the combines resources of uranium, gas, oil and coal.
PV panel technology is still in its infancy but already brings in enough energy to sufficiently reduce your heating and electricity costs in the UK. One area that will be important in the coming years is the ability to store energy as the sun’s intensity rises and falls due to weather conditions. The ability to store the energy that is harnessed and to use it in conjunction with other energy sources is seen as an important part of the UK energy strategy and similarly, an important way of managing the individual energy needs.
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