There are 4 types of Mono Solar Panels:
1-Mono-Crystalline
2-Mono-PERC(Passivated Emitter and Rear Contact)
3-Mono-TopCon(Tunnel Oxide Passivated Contacts)
4-Mono-HJT(Hetero Junction Technology)
We can differentiate between the 4 types of solar cells in terms of cell efficiency. Monocrystalline solar cells have a 15 to 20% efficiency. MonoPERC have a 24% efficiency, MonoTopCon have a 26% efficiency and MonoHJT start at 26% for monofacial to 30% for bifacial cells.