Hybrid renewable energy generation (HREG) with single-stage multiport (SSM) inverters features high efficiency, small size, high reliability, and a long lifespan. While the limited variety of SSM inverters currently available is impeding the progress of HREG development. To alleviate this issue, a power flow unit combination-based topology method is proposed in this paper to develop more SSM inverters for HREG, where the features of target topologies are revealed by analyzing the operation states and power flow of HREG, and the final topologies can be constructed by combining units to meet the features. Under the proposed topology derivation method, a family of SSM inverters is derived. The analysis of operational mode and the corresponding experimental outcomes for derived topologies have been presented.