Polycrystalline solar panels are solar panels that consist of several crystals of silicon in a single PV cell.
As there are multiple silicon crystals in each cell, polycrystalline panels allow little movement of electrons inside the cells. Polycrystalline solar panels are more eco-friendly than monocrystalline solar panels as they do not require individual shaping and placement of each crystal, these panels also have lower heat tolerance than monocrystalline panels. So, at higher temperatures, these solar panels have lower efficiency than others with high power density.