Case 14725

Per Panel Photovoltaic Energy Extraction with Multilevel Output DC-DC Switched Capacitor Converters


Switched capacitor, module integrated converters, photovoltaic, ripple port inverter


Widespread grid generation of PV


Electrolytic capacitors and per panel magnetics have limited lifetime and are expensive.


This invention proposes per-panel Maximum Power Point Tracking (MPPT) for widespread solar arrays. A full system approach is presented, utilizing switched capacitor multi-level DC-DC and a central ripple-port inverter to replace the multiple inductors used in current PV technology.

  • Substantial cost reduction and prolonged lifetime
  • Average total efficiencies of tracking and conversion greater than 93% for a 510 W, 3 panel, DC-DC system.

  • Professor Steven B. Leeb (Department of Electrical Engineering and Computer Sciences)
  • John J. Cooley (Department of Electrical Engineering and Computer Sciences)

Intellectual Property:

US Patent Application Number 13/039382, filed on March 3, 2011

PCT Patent Application Number PCT/US2012/026015, February 22, 2012


Applied Power Electronics Conference Proceedings 2011

Last revised: April 30, 2013

»List of Energy IP«