A monocrystalline (mono) solar cell is a type of photovoltaic cell made from a single crystal structure, typically silicon. Unlike polycrystalline cells, which consist of multiple silicon crystals, monocrystalline cells have a uniform and continuous crystal lattice. This design enhances their efficiency, as it allows for better electron flow.

Monocrystalline solar panels are known for their high efficiency, meaning they can convert a larger portion of sunlight into electricity. They also tend to perform well in low-light conditions. While monocrystalline panels are often more expensive to produce, their space efficiency and better performance make them a popular choice for various solar installations, especially where space is limited.