Importance

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Abstract

Current pole/mast mounted photovoltaic systems rely on gravity to lower the panel down the mast. The energy derived is typically conducted along a coiled conductor that expands or collapses like a spring inside the hollow mast as the movable device, with the solar panel attached, is raised or lowered for maintenance. Due to the large size and stiffness of the coiled conductor, especially in cold weather, the weight of the movable device may not be sufficient to cause the panel to descend when tension on the supporting cable is released. We have developed a method of pulling the sleeve/ring down the mast/pole as well as up. Over long periods of non-use, the sleeve can freeze in position. This new system aids in freeing it up and is also useful when there is un-even side loading on the sleeve. A winch driven chain or cable, attached to the movable device, extending upward to a top roller then internally downward to the winch and then externally extending back up to the movable device, accomplishes this task. A further improvement is a plurality of vertical guide wires and guides attached to the conductor coils that prevent the coils from overlapping in the collapsing mode. An additional improvement is taught wherein the coiled conductor is replaced by a set of conducting rails with a shorter conductor attached to the solar panel.

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First Claim