Supercapacitors represent one of the newest innovations in the field of electrical energy storage. In comparison with classical capacitors, these new components allow a higher energy density, together with a high power density. Even if the energy density is not comparable with electrochemical accumulators, the possible energy amount and storage time is compatible with many industrial requirements. For example, we can quote some application fields such as: · Smoothed energy distribution for electric bus transportation · Voltage drop compensation for weak distribution of energy · Load-equalizing for elevators There are many research and development projects running at university level, but in connection with specialists from the corresponding application fields. Innovative and promising solutions are investigated, which need of course clarification of their actual industrial and economical compatibility.