This is the Value able 40W 120Vac Inverter Circuit Diagram. This 40W 120Vac Inverter Circuit Diagram uses a 12.6-V to 120-V transformer to deliver a quasi-sine wave that has the same rms and peak voltage as a pure sine wave. Q1 to Q6 must be heatsinked. A 1.5` 4` aluminum heatsink was used on the prototype.
The transformer should be a 3-A unit. The 40W 120Vac Inverter Circuit Diagram uses feedback to help regulate the output voltage to 120 Vac. Notice that the output frequency is 75 Hz to avoid saturating the core of T1.