Aiming　at　the　problems　of　power　loss　caused　by　photovoltaic　(PV)　panels　mismatch,　and　how　to　reduce　conversion　stage,　number　of　current　sensors,　etc.　A　quasi-single-stage　Flyback　type　distributed　PV　grid-connected　inverter　with　parallel　bus　and　CPU　time-sharing　maximum　power　output　energy　management　control　was　proposed.　Meanwhile,　the　circuit　topology,　maximum　power　output　energy　management　control　strategy　and　steady-state　principle　characteristic,　such　as　operation　modes　and　duty　ratio　expressions,　were　deeply　investigated,　important　conclusions　were　obtained.　The　topology　is　consisted　of　a　unidirectional　Flyback　converter　with　multi-input　selected　switches　in　series　and　an　unfold　bridge.　By　controlling　the　instantaneous　grid-connected　current　and　the　output　power　ratios　of　multi-inputs,　the　strategy　realizes　energy　management　of　multiple　PV　panels.　The　inverter　takes　only　a　current　sensor　and　a　control　chip　by　using　parallel　bus　and　CPU　time-sharing　implementation.　Designed　and　implemented　500W　27~39VDC/　220V50HzAC　prototype　has　excellent　performances　such　as　high　PV　utilization　efficiency,　high　conversion　efficiency,　high　quality　of　grid-connected　current　waveforms,　strong　low　voltage　ride　through　capability,　low　cost,　etc.　It　is　an　efficient　scheme　for　low　power　distributed　PV　inverters.　©　2018　Chin.　Soc.　for　Elec.　Eng.