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Why solar PV panels
Standard solar PV panels are made from modules connected in parallel or in series. They owe their properties to silicon cells which absorb photons that generate electric energy from solar energy. It is access to sunlight that determines the performance efficiency of the entire system and it should be the key factor in selection of the installation venue. Optimum conditions are provided by slanted south-facing roofs (in our latitude the optimum tilt should be 35-40 degrees) or open spaces which are not prone to shading at noon. The negative impact of shading on performance of the entire panel may be partially mitigated by special bypass diodes designed to optimise generation of electric energy.
Classification of solar cells
Classification of solar cells
Different solar PV panel modules come with special safeguarding measures. They are protected from below by a layer of electro-insulating film which may be transparent or tinted. The outer surface of cells is protected from damage by a layer of laminated EVA film. In addition, the face exposed to the sun is fitted with a slab of toughened glass which is approx. 2-3 cm thick. Other essential elements of the complete installation include the aluminium frame plus the connection socket with cabling.
Depending on the type of silicon technology used to produce solar PV cells, PV panels are usually split into three categories – monocrystalline, polycrystalline, and amorphous panels.
- Most popular are polycrystalline panels made from cast ingots. Blue ingots have square shape and silicon crystals are visible on their surface.
- Higher energy efficiency (even up 19%) is demonstrated by black monocrystalline cells grown using the Czochralski process. They have very regular structure, only few impurities are visible to the naked eye, and are expected to last at least 30 years. It’s a viable investment for users whose houses have a small roof or a small installation footprint.
- The most economic solution are amorphous cells with a distinctive brown or claret colour. They stand out with almost unlimited prospects for their application as they may be easily fashioned into any given shape. A separate category is made up by brittle and very delicate thin-film solar cells. Their main advantage is that partial shading of the module that does affect performance of its unshaded surface and hence does not slow down generation of electric energy.
Our panels are made of components supplied by established manufacturers and hold certificates that guarantee the highest level of safety of their usage. We are convinced that our systems are reliable which is why we offer 12-year product warranty and 25-year performance warranty.