Can I upgrade my main panel?
Sorry for the basic question, but here goes...
I just bought a house (built in 2002) with a 150 amp main panel. The panel is completely full and I'm now in the process of wiring my detached garage. Obviously I need to install a sub panel, but I'll need it to handle the various garage circuits including a 220V outlet (40amp) plus have the capacity for a 500sqft addition and a pool.
My question is this: can I upgrade the main breaker to something more than a 150amp so I can run a 100amp sub panel? The service to the panel is 2 2/0 Aluminum. According to what I could find, 2/0 AL is good for up to 150A, but since there are two service feeds, does that mean it will support up to 300A or that simply because of the 220V circuits? I'd like to upgrade the main to at least 200, can I do that simply by swapping the main breaker or do I need the electric company to upgrade my service?
Thanks for your help.