An isolated photovoltaic micro-inverter for standalone and grid-tied applications is designed and implemented to achieve high efficiency. System configuration and design considerations, including the proposed active-clamp forward-flyback resonant converter for the DC-DC stage and a dual-frequency full-bridge inverter for the DC-AC stage, are analyzed and discussed. A prototype microinverter system is built and tested. Experimental results verify the feasibility of the proposed system, which achieves 95% power conversion efficiency at full load.
Liu, Y. C., Chen, M. C., Yang, C. Y., Kim, K. A., & Chiu, H. J. (2018). High-efficiency isolated photovoltaic microinverter using wide-band gap switches for standalone and grid-tied applications. Energies, 11(3). https://doi.org/10.3390/en11030569