This　paper　proposes　a　single-stage　three-port　isolated　H-bridge　inverter.　Five　operating　modes　and　five　switching　equivalent　circuits　of　the　inverter　are　studied,　and　three　H-bridge　three-phase-shift　modulation　strategy　and　multi-loop　energy　management　control　strategy　are　proposed　to　achieve　the　maximum　power　tracking　of　the　photovoltaic　cells,　at　the　same　time,　the　energy　flow　and　power　balance　between　the　three　ports　of　photovoltaic,　battery　and　load　are　realized　by　reasonably　controlling　the　charging　and　discharging　of　the　battery,　so　as　to　ensure　the　continuous　and　stable　power　supply　of　the　system　to　the　load.　The　circuit　topology,　operation　modes,　switching　equivalent　circuits,　phase-shift　modulation　strategy　and　control　strategy,　and　circuit　parameter　design　of　the　inverter　are　also　theoretically　analyzed.　On　this　basis,　a　single-stage　three-port　isolated　H-bridge　inverter　experimental　prototype　is　designed　and　developed,　and　the　experimental　results　verify　the　feasibility　and　correctness　of　the　proposed　topology　and　control　strategy.