I need to upgrade from 100amp to 200 amp service in my house that is 4 years old. The current panel is a GE #TLM2020CCUG with a 100 amp main breaker. It is as easy as making sure the wires from the meter are rated for 200 amps(currently AWG 33.62 sq. mm) and putting a 200 amp main breaker? The elecric company will need to upgrade my meter and will do so when I am ready.