Simplistic simulation showing operation in a grid-tied inverter.
Link to Falstad's animated interactive simulator. Clicking it:
* opens website falstad.com/circuit
* loads my schematic
* runs it on your computer.
1) House voltage provides AC bias signals to H-bridge. Power supply is single polarity.
2) H-bridge sends 41 V_peak AC (several Amperes) to transformer primary.
3) Transformer steps up AC manifold (10 X).
4) Transformer secondary sends 230 VAC (a few Amperes) to grid.
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Overall parasitic resistance has to be minimized.
For the system to carry hundreds of Watts, it seems more practical to utilize the entire primary full time, rather than make a center-tapped primary switch alternately between the halves and furthermore step up voltage 20X through each half.