 Zep is best known for inventing a system that allows PV installers to "snap together" panels on the roof more quickly than other installation approaches, in order to shorten installation time.Zep Solar's technology eliminates the need for mounting rails on many roof types.In August 2016, Musk announced that Tesla would be introducing a new product called the Tesla Solar Roof where the photovoltaic electrical energy generating devices and system would make up an entire roof surface, rather than merely be the mounting of solar panels on an existing roof, as solar energy systems have generally been designed and installed during the early decades of terrestrial solar power.