Photovoltaic Ribbon VS Inter-connected Cells

Photovoltaic ribbon and interconnected cells are two different methods of connecting solar cells within a solar panel. While both approaches serve the purpose of delivering electricity from one cell to another, they employ different techniques with varying advantages and limitations.

Photovoltaic ribbon, also known as solar bus ribbon, is a thin, flexible strip of conductive material typically made of copper or aluminum. It is used to interconnect the solar cells within a panel, creating a series connection to enhance the overall voltage output. The ribbon is soldered onto the front and back contacts of adjacent cells, forming a continuous electrical pathway. This method offers a number of benefits.

Firstly, photovoltaic ribbon allows for a reduced contact resistance compared to other interconnection methods. This is due to the large surface area of the ribbon that makes contact with the cell's metal contact fingers, resulting in better conductivity and improved electrical efficiency. Additionally, the ribbon's flexibility allows for thermal expansion and contraction, reducing the likelihood of mechanical stress or cracking on the cells during temperature fluctuations. 

On the other hand, interconnected cells involve the physical connection of individual cells through soldering or other bonding methods, typically by utilizing a conductive adhesive.