Copper and Aluminum Busbar

The busbar material choice has drastically changed from a mere cost consideration to a decision with the highest categorization of importance.  In the Indian electrical projects, especially those concerning switchgear panels, electric vehicle (EV) charging infrastructure, solar plants, and lithium battery systems, the use of copper and  aluminum busbars essentially leads to a difference in power loss, aging and heat resistance, maintenance cost, and system longevity. This 2026 buyer guide uncovers the actual technological differences through rather than marketing buzz. Electrical Conductivity & Power Loss (The Hidden Cost) Copper's electrical conductivity is about 58 MS/m, while that of aluminum is roughly 37 MS/m. In practice, this means the following: Aluminum busbars need a cross-section that is 30–40% larger to carry the same current as copper. If aluminum has been poorly sized, the I²R losses will increase rapidly, resulting in: Higher heat gen…