The presented GA-based design approach to optimization of power electronics circuits is shown to be a very effective and powerful tool for obtaining improved solutions compared to traditional design procedures. Future design tools based on this approach could also be used to rapidly provide an estimation of the minimum cost of the system under certain design specifications and conditions and to vary the specifications and operating conditions in order to investigate possible ways of reducing the system cost, etc. Due to the short time required to obtain this information, the tool is also especially useful for initial project evaluations (viability, etc.) and for the design of different products within one platform