Liquid droplet powered electricity generator

An electricity generator powered by impacting and impinging liquid droplets, comprising a plurality of electricity generator units, each said electricity generator unit includes a glass substrate defining an upwardly facing surface and a downwardly facing surface, wherein said substrate includes i) a region with only a polytetrafluoroethylene (PTFE) coat on the upwardly facing surface and ii) an electrode arranged adjacent said PTFE coated region on the upwardly facing surface in that the said PTFE coated region and said electrode are positioned on the upwardly facing surface to receive an impacting and impinging water droplet, and wherein circuitry of said generator connects said PTFE coated region and said electrode via an electrical connection passing the downwardly facing surface, and electricity is harvested via said electrical connection, and wherein said electricity generator units are connected in series or in parallel to form the electricity generator.