An electrical connection system for providing electrical connection between first and second devices comprises one or more electrical connection posts and one or more electrical connection tubes. Each post has a first end and an opposite second end, where the first end is configured to electrically connect with a first device such as a photovoltaic cell. Each tube has an opening to receive and provide electrical connection with the second end of a respective post. First and second end connectors are provided at respective opposite axial ends of a connection tube to enable end to end electrical connection between adjacent tubes. The opening comprises a longitudinal slot together with a plurality of secondary slots. Each secondary slot comprises a first length that extends in a circumferential direction, and a second length that extends in the axial direction, with a circular portion that acts as an electrical contact. In order to connect the posts to a tube the tube is orientated so that the ends of the posts are in alignment with the slot. The tube is then slid axially so that the ends of the post are located within the slot and inside the tube adjacent respective first lengths of a slot. The tube is then rotated about its longitudinal axis and then slid axially so as to finally locate the ends within the circular portions.