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I had a similar task. I used the baseline system (existing building) to get the peak load before electrification, and of course the electrification model for that peak load. Annual peak load is the ABUPS. I then used these guidelines to figure out the panel size for the baseline and electrification.

If the electrification required a jump to a new panel amperage, then that was included in the cost. I upped the amperage of the panel rather than trying to change the service voltage. Not sure if that's how an electrical engineer would do it, but I figured that upping the amperage was lower cost than changing to a higher voltage and was still safe.

I had a similar task. I used the baseline system (existing building) to get the peak load before electrification, and of course the electrification model for that peak load. Annual facility peak load is the ABUPS. Total End Uses in the Demand End Use Components Summary, or the output variable Facility Total Building Electric Demand Power will give it for each simulation step. I then used these guidelines to figure out the panel size for the baseline and electrification.

If the electrification required a jump to a new panel amperage, then that was included in the cost. I upped the amperage of the panel rather than trying to change the service voltage. Not sure if that's how an electrical engineer would do it, but I figured that upping the amperage was lower cost than changing to a higher voltage and was still safe.