[alextingle]

> A roof mounted solar array easily adds $20,000 - 25,000 to reroofing a house just in labor (assuming two electricians for one week on either side of the reroofing with labor priced at $150/hr)

Why do you need two electricians for a week? My rooftop solar array went up in an afternoon. They had three labourers. The (singular) electrician came in separately and worked for under and hour.

[bfeynman]

reroofing means disassembling and reassembling. You need to deconstruct, put the new roof on, then add the solar back.

[alextingle]

The quoted cost of wasn't for the re-roofing, it was in addition to the re-roofing:

> "[solar] adds $20,000 - 25,000 to reroofing a house"

Since all of the scaffolding or whatever is already up for the roof work, if anything the solar ought to be cheaper, in that scenario.