Silicon solar cells are metallised with thin strips printed on the front and rear of a solar cell; these are called busbars and have the purpose of conducting the electric direct current (DC) power generated by the cell.
Older solar cells typically had two busbars; however, the industry has moved towards higher efficiencies and busbars have increased to three (or more) in most solar cells.
The increased number of busbars has several advantages: first is the high potential for cost-saving due to a reduction in metal consumption for front-facing metallisation;
second, series resistance losses are reduced by employing thin wires instead of regular ribbon ; and third, optimising the width of the busbars leads to an additional rise in efficiency.
A higher number of busbars leads to higher module efficiencies because of reduced internal resistance losses; this is due to the lower distance between the busbars.
Finally, the multi-busbar design is highly beneficial for bifacial technology, especially for improving the facility for PERC cells of 90%.
Etiam magna arcu, ullamcorper ut pulvinar et, ornare sit amet ligula. Aliquam vitae bibendum lorem. Cras id dui lectus. Pellentesque nec felis tristique urna lacinia sollicitudin ac ac ex. Maecenas mattis faucibus condimentum. Curabitur imperdiet felis at est posuere bibendum. Sed quis nulla tellus.