Calculate how much energy is lost due to inverter inefficiency and find the real usable AC power or kWh output from a DC source. Formula: AC Output = DC Input × (Efficiency/100) × (1 - Margin/100). Addition-ally, prototypes of 3 kW single-phase inverters are manufac-tured to compare the loss predicted by the theoretical loss formulas and actual experimental data. By analyzing the efi-ciency according to the conditions of frequency, voltage, and load, the operating area where each of the. In the PV power generation device, the inverter as a kind of alternating current (AC) and direct current (DC) conversion device, plays an important role in the power supply quality and power generation efficiency. This. Pulse Width Modulation (PWM) control used within the inverter. Losses data can be loaded from a standardized xml file, or defined manually by the user.