A solar energy collection system comprising a solar tracker characterised by comprising a main horizontal load-bearing tube able to rotate about its axis; a plurality of secondary tubes fixed in a manner movable perpendicularly to said main tube and able to rotate about their axis; to each of said secondary tubes there being fixed a panel able to capture solar energy; a support structure comprising a first post and a second post positioned vertically; said first post and said second post each comprising a connection element positioned at their top, for securing said main tube at its ends; said connection element comprising a first lateral portion for fixing said main tube and a second lateral portion for fixing a possible further main tube; said main tube comprising a slidable joint enabling it to expand, said slidable joint being fixed at one end to said main tube and at the other end to said first lateral portion; said first post and said second post comprising a coupling point at their base; said coupling point being fixed to the ground by a screw shaft; each of said first post and said second post being maintained in a vertical position by at least two cables fixed to the ground; said at least two cables being fixed to the ground by screw shafts.