Polycrystalline, also known as multi-crystalline solar panels are considered to be less efficient than monocrystalline panels, but more cost-friendly. Instead of using single silicon crystals, polycrystalline solar panels are made by melting and blending multiple raw fragments of silicon together in square moulds and cooling them down to form wafers. Since the cells are made of multiple crystals, the electrons have relatively less space to flow. The blending of several silicon layers gives polycrystalline solar panels a blue coloured hue.

Polycrystalline solar panels can be utilized in both small-scale and large-scale installations as they come in a vast range of power wattages. Since polycrystalline solar panels are cheaper and more eco-friendly to produce, they are also used in large solar farms, roof-mounted arrays, traffic-lights, houses, etc.