This paper analyzes smart combinations of rechargeable batteries and capacitors in energy storage media of photovoltaic (PV) powered products. Important in a mature design of such products is an efficient energy transfer from PV converter into the storage media and from storage towards the energy consuming application. In this paper, an introduction sets the stage for combining batteries and capacitors followed by a background section, a section on experiments and a synthesis section analyzing the test results and anticipation on future developments. The final section presents a summary of conclusions. (c) 2005 Elsevier B.V. All rights reserved.