I am starting renovations of my shop, which is an outbuilding with power from its own meter, to include a new roof, heat pump, insulation and additional wiring. I currently have 100 AMP service with a Cutler Hammer CH Main Panel. I was going to install a sub panel but Lowe's has a 200 AMP Cutler Hammer CH Main service panel on sale for only a little more than a 60 AMP panel.
My thinking is that I have the power company turn off the power and I replace the current 100 AMP main panel with the new 200 AMP panel. I take the main breaker from the old panel and put it in the new one (it is compatible) which will derate it back to 100 AMPS. I then have the utility company turn the power back on.
If I ever run out of power I simply upgrade service to 200 AMPS and have an electrician run the new power to the main breaker which I change to 200 AMPS. Any problems with this?