It is over the life of shingles plus energy. That won't be true of the first few years of sales. As an upside, I think the comparison is with one roof replacem

It is over the life of shingles plus energy. That won't be true of the first few years of sales. As an upside, I think the comparison is with one roof replacement, which is supposed to be done every 8-20 years. Tesla tiles should last 100 years.