Hi, we are buying a home and the electrical was flagged as quite old. My understanding is the home has 200amp service with an old pushmatic panel, as well as a more modern sub-panel (see panel photos below). I thought I heard adding the 100amp sub-panel made it 300amp, but I have no idea if that is correct / even possible. So my questions are:
Do I have 200 or 300 amp service…or how do I determine that?
Looking at the photos is upgrading the pushmatic a priority?
If I did want to upgrade say to 400 amp service, what is a ballpark estimate? (Northern Chicago suburbs in case it matters)