How Solar Modules Work
Photovoltaic cells are made of special materials called semiconductors such as silicon, which is currently used most commonly. Basically, when light strikes the cell, a certain portion of it is absorbed within the semiconductor material. This means that the energy of the absorbed light is transferred to the semiconductor. The energy knocks electrons loose, allowing them to flow freely.
PV cells also all have one or more electric field that acts to force electrons freed by light absorption to flow in a certain direction. This flow of electrons is a current, and by placing metal contacts on the top and bottom of the PV cell, we can draw that current off for external use. This current, together with the cell's voltage (which is a result of its built-in electric field or fields), defines the power (or wattage) that the solar cell can produce.
Sanyo high performance modules are more expensive, but perform up to 10% better than other modules. They are also power dense, which means that they squeeze in as much power as possible into a given roof area. This is particularly beneficial when trying to maximise a smaller roof space.
Solar Century C21e Tiles and Slates are ideal in a new build or when a re-roof is needed. They blend in with the roof tiles, which makes them the first choice for when aesthetics are a key priority for an installation.
Solar Century M185s are entirely black with a black frame. These modules look great and are also of a superior efficiency to alternatives.
Day 4 modules utilise an anti-shading technology, great for roofs that have shading issues.
Sharp modules are assembled in the UK and are a good, all-round, solid performer.
Yingli modules are affordable, robust and come in a wide range of sizes for all needs.
BP Solar are very high quality modules with a good performance, from one of the world's most experienced solar panel manufacturers.
And many more....
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