What is PERC?

Using PERC (Passivated Emitter Rear Cell) technology means adding an additional dielectric passivation layer on the back side of the cell. As light energy hits a standard solar cell, not all energy is absorbed by it, where a small portion of the light passes through the cell without being converted into usable energy. Furthermore the rear side passivation layer on a PERC solar cell functions as a power reflector, that reflects the excess light back to the solar cell for a second absorption phase, resulting in higher solar cell efficiency.


PERC modules have higher efficiencies because they reflect light that modules with standard solar cells cannot reflect and at the same time the PERC modules absorb more light.
The high performances lead to lower system costs, increase the energy yield and thereby the profitability of the photovoltaic system. These modules are especially interesting for people with limited roof space.