That's great. I'm about to upgrade my service to 200amp and leave space for a transfer switch. It's not strictly needed at the moment but, the wall perpendicular to the panel is open now and it leaves a path for an easy run to a sub panel in the garage for my workshop and the master suite above. This way there's enough amps and breakers for solar/battery and car charger if/when, and a laundry closet, radiant heat and/or mini split for the master suite above the garage.
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