Photovoltaic Specialists Conference
The IEEE Photovoltaic Specialists Conference (also called PVSC) is the longest running technical conference dedicated to photovoltaics, solar cells, and solar power. The first PVSC was in 1961 at the NASA headquarters in Washington DC. The number of conference areas have expanded and now include PV reliability and solar resource.
Source: Wikipedia — Photovoltaic Specialists Conference (CC BY-SA 4.0)