Solar Energy

In 1839 the French physicist Alexandre Edmond Becquerel discovered, that some copper-oxygen electrodes could create an electrical current when they were exposed to light. Some 50 years later Charles Frits produced the first photovoltaic cells of the chemical element selenium. Back then he predicted that future buildings would be covered with solar cells for production of electricity.

The first silicone solar cell had an efficiency of 6% and was manufactured by Bell Laboratories in the United States. It was not much, but it still gave cause for optimism, and in 1958 the first solar cells were sent into space with the satellite Vanguard, and we can safely say, that the space industry became the driving force behind the development of solar cells in the 60ies and 70ies, thus becoming the basis for today’s development of photovoltaic cells.

We use solar modules only from world-leading and bankable manufactures that provide a 25 year warranty on their efficiency.

While there are many types of solar modules or photovoltaic modules, they all work on the same principle.

Photovoltaic as the word implies, photo means light and voltaic means electricity, convert sunlight directly into electricity. The conversion is created by a flow of electrons between 2 or more layers of material when exposed to light.

Photovoltaic cells are made of materials called semiconductors such as silicon, as it is a strong light absorber. When the light strikes the cell, some of it, depending on the efficiency of the cell, is absorbed by the semiconductors transferring or converting the energy from the light. This is done by controlling the flow of electrons into a current. The output power is controlled by the number of cells in a module, and the efficiency of the cells.

Crystalline silicon is used is most solar cells today as it has proved convenient because it yields stable solar cells with good efficiencies, typically between 13-16% and has a very long service life with very low degration in power output over time. It’s a proven and well known technology.