solar inverter transformer (also called an inverter duty transformer or step-up transformer) is a specialized electrical component used in photovoltaic (PV) solar systems to step up the AC voltage produced by an inverter so it can safely sync with and feed into the utility grid. Key Functions • Voltage Step-Up: Increases the low-to-medium AC voltage coming from the solar inverter (often a few hundred volts up to low kV) to higher grid distribution levels (such as 11 kV or 33 kV). • Galvanic Isolation: Provides physical and electrical separation between the solar array/inverter and the power grid to protect equipment from voltage spikes and surges. • Harmonic & DC Resistance: Built with specialized magnetic designs and windings to handle high-frequency switching harmonics and residual DC components generated by modern inverter electronics