Electrical connection system

An electrical connection system comprises a rail and a plurality of electrically conducting posts fixed to the rail . The rail is in the form of a tube or rod provided with complimentary electrical connectors and at opposite ends. Each post is coupled to a rail by a short transverse link . A fitting is provided at a free end of each post to facilitate mechanical and electrical connection with a through hole terminal. Pairs of rails may be disposed side by side to form nominal positive and negative rails with the posts of the rails interleaving each other and in mutual alignment. In some instances, photovoltaic tiles that include holes and forming conductive terminals are fitted over posts