- The "PV Doctor" is a spin-off from the Solar Energy Research Institute of Singapore (SERIS) at the National University of Singapore (NUS). PV Doctor Pte. Ltd. is an Asset Performance Management (APM) company which focuses on maximising solar PV assets performance and rectifying underperforming assets. The company manages thousand+ assets across Asia and beyond. It also offers other PV system-related services, including, but not limited to: Smart O&M (operation & maintenance), Preventive O&M, Rectifications & Special Investigations, Repowering, Audits & Performance Assessment, and other technical services.