ESP projects utilises Monocrystalline and Polycrystalline solar panels which have a high efficiency and have a proven excellent performance in Queensland’s hot environment. We source these panels from reliable suppliers who sell good quality products to suit all budgets.
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Solar modules transform light into electrical energy. They are made up of individual solar cells that release energy when exposed to light. This photovoltaic process is based on a special material that is present in almost all solar cells: silicon – a semiconductor with natural electrical properties.
Silicon is the most prevalent element on Earth after oxygen which makes it a very inexpensive and nearly inexhaustible natural resource. In order to make use of it for photovoltaic purposes though, a complicated, multi-step process is necessary. Simple silica sand is transformed into pure crystalline silicon. There are several types, depending on the crystal structure and production method:
Monocrystalline solar cells are black or dark blue in color. They are made up of just one crystal and have the highest efficiency factor of all silicon cells (typically 15 to 17%). They are preferred in situations where available surface area is limited, such as most domestic situations. Their lifespan is at least 25 years.
Polycrystalline or multi-crystalline solar cells have a blue surface. Their crystal structure is only partially ordered giving them less voltage which means a somewhat lower efficiency factor. Polycrystalline cells are easier to manufacture and cheaper to produce, although these factors must be weighed up against the lower efficiency and the resultant larger array size required for any given output.
Thin film modules are dark red or dark brown in color. They are made up of a thin, amorphous silicon layer. Thanks to their low material consumption and low price, they are usually utilised in projects where large surfaces are to be covered. They have a low efficiency factor in bright sunlight, but they do offer advantages in low and diffuse light.
The higher the exposure to sunlight, the more voltage is released in the solar cells, and the higher the performance of the photovoltaic installation. In the morning and evening as well as in fog or under thick cloud cover, performance is lower but photovoltaic installations still produce electricity in diffuse light.
The lower the temperature, the higher the voltage released in the solar cells and the higher the electricity generation. It may seem counter-intuitive, but solar modules function better in colder weather than in blazing heat. A good ventilation of solar modules lowers their core temperature and increases their performance.