Monocrystalline, also known as single-crystalline panels are considered to be the most developed category of solar panels. Monocrystalline solar cells are made up of cylindrical silicon ingots, which are then finely sliced to form silicon wafers. The composition of these cells is purer since each cell is made from a single piece of silicon, thus the electrons have more space to flow. Monocrystalline solar panels generally have a black coloured hue.

Monocrystalline solar panels are popular amidst solar rooftop systems and are generally used for large-scale installations that could be industrial, commercial or residential.Depending on the size of the panels, they can be utilized for small-scale (<25 W) applications such as charging electronics, batteries, cameras, etc. Relatively larger solar panels (>40 W) can be used to power lights, microwaves, fridges and in cases of being integrated into solar panel systems.