This is the scheme diagram of 500W power inverter circuit which build using 10 pieces of well-known NPN power transistor 2N3055 to amplify the AC signal produced by multivibrator. The frequency generator / multivibrator is built based on transistors too. All of the components is easy to gathered from the electronic store.

This is the 500W power inverter circuit, converting a 12VDC battery (usually car battery) to become 220-240V AC power. The inverter is powered using 6 pairs of transistor TIP35C which connected in parallel, so it will be 12 TIP35C transistors.

Another MOSFET power inverter which capable to deliver 500W electric power. The inverter build using MOSFET power RFP50N06, convert DC input 12V and give you AC voltage output 110V-220V.