Monocrystalline solar panels have black-colored solar cells made of a single silicon crystal and usually have a higher efficiency rating. However, these panels often come at a higher price. Polycrystalline solar panels have blue-colored cells made of multiple silicon crystals melted together.
Polycrystalline solar cells are also called "multi-crystalline" or many-crystal silicon. Polycrystalline solar panels generally have lower efficiencies than monocrystalline cell options because there are many more crystals in each cell, meaning less freedom for the electrons to move.
These panels usually have a blue, speckled appearance. Typical efficiency ratings for polycrystalline panels sit at around 15 to 18 per cent. As a result, more panels and more roof space are needed to achieve the same output as a monocrystalline solar panel system.
Typical efficiency ratings for polycrystalline panels sit at around 15 to 18 per cent. As a result, more panels and more roof space are needed to achieve the same output as a monocrystalline solar panel system. For homes with larger roofs, this may not be an issue, but it can be a limiting factor for many UK properties.
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