Something about solar energy

Something about solar energy

Engineering, Uncategorized

We tried to collect the most recent and interesting facts from the world of solar energy.

BP Statistical Review of World Energy, 2015

The amount of electric energy generated in the world is 23,536.5 TW hours (1,064 TW hours in Russia, 5,649 TW hours in China), including all kinds of power plants:


Thermal: operating on coal, gas, diesel and BIOfuel


On renewable energy: wind, sun and tides.

On solar panels – 185.9 TW hours (in 2004 it was only 2.6! It turns out that for 11 years the volumes of solar energy have increased in 71 times). It’s just official figures of energy companies, there is a very significant part of the private home use.

If to compare, 244.5 TW hours were generated in the entire Australian continent

Your dishwasher consumes 1-1.5 kW•h



On average, solar cells fell in price by 4% per year from 1990 to 2005, and their efficiency was constantly increasing. And over the last 16 months solar energy has fallen in price by 50%.  2.99 cents per kW can be considered as a new record. This is the lowest price of clean energy, fixed today. But the record is unlikely to last long, as during 2015 and 2016 tenders a tendency to a sharp decline in prices in many countries has been formed. Of course, we are talking about minimum price in solar countries. But average cost of solar energy in other countries is also rapidly decreasing. In a few years or even decades, even in our country the price for solar energy will inevitably fall to 2-3 cents per kW•h.

31 billion barrels of oil are annually burned in the world.


Tesla contribution:

In 2015  home battery Tesla Powewall was released, designed to operate in order to save money on the difference between day and night tariffs or combined with solar panels. With a declared value of USD 3,500 per 10 kW•h, it will not be paid off for 10 years, but here we are no longer talking about money, but about the first step towards mass use of energy storage facilities and autonomy for your houses or enterprises. And according to the number of applications – society is ready for this important step!


When Gigafactory became operational, the cost of batteries, following the forecasts, will be reduced to USD 125/kW•h

Let`s calculate: country house in the moderate climate requires 60 kW•h per day, 3/4 of it should be stored in batteries (as the solar panels operate for a limited period in the winter season) amounting to USD 5,625 which is quite acceptable with a view to well considered software, presentable appearance and ease in operation!


It is expected that the electricity cost balance between conventional and solar energy will be reached in 2033.

It is particularly worth noting Ilona Maska contribution to the renewable “green” energy popularization and the beginning of global and large-scale changes in the automotive industry. Companies such as Google, Uber, Amazon and Apple realizing the enormous perspectives of this direction, have already announced about development of their own electric vehicles.



The Sahara Desert is an area of the highest solar radiation on Earth, i.e., solar panels generate the highest number of electric energy. Under ideal conditions index can reach 250 GW•h per square kilometer annually! It is not difficult to calculate, that to provide electric energy to all the humans on the Earth area of 100,000 square kilometres (300×300 km) is needed! This is slightly more than 1% of the harsh desert surface!

The good news is that the plans for a large-scale project implementation already start to turn into reality and such companies as Deutsche Bank, E.ON, RWE, MAN Solar Millennium and Siemens have announced about their readiness to finance pilot power plants with 3 GW capacity in Egypt.

Пустыня-умFortezza forecasts:

  • Full autonomy of the most gadgets and light machinery can be achieved by manufacturing of surfaces generating electric current and more capacious and reliable batteries. Significant role in this case will be played by the wireless charges that will allow feeding from auxiliary sources (such as clothing); bspr3


  • The enormous reduction in power consumption by devices (diode bulbs consume 10-12 times less energy comparing with the incandescent bulbs and they are already widely used). Electric motors become more efficient and more durable; LED-2


  • Autonomous electrification of the housing settlements, villages and some districts and cities by the solar panels; Autonomous-electrification-2


In addition to private use, mini power plants and storage facilities (batteries) for a few hundred of houses will be created, and this sector will not depend on the monopolist or wire breakage in the midst of natural disaster or problems related to connection of the new facility due to the bureaucratic procedures.