Much Much higher price. I put my home info into the calculator.
Asphalt roof (Tesla's estimate): $17,400
Solar Roof(40% solar): $81,600
Tesla PowerWall(2 ea for AC): $12,500
They decide that my roof will make $79,100 in electricity over 30 years, and that I can get a $21,300 tax credit. Which makes break even something like 20ish years over a normal roof. Assuming the cost of electricity is right (and doesn't change) and the roof and batteries actually last for 30 years. FWIW, my ENTIRE electric bill for the next 30 years is $72,000. So Tesla thinks that this roof will make everything i could possibly use, and enough left over to sell.
Or they'll finance it for me for 4.5%APR and $369/month. I'm enrolled in Florida Power's averaging program (they average out a years usage, divide by 12 and charge me that amount per month for the next year) and my power bill has been within $10 of $200 since I moved in. So for not quite double my power bill I can get a roof that will not quite provide all the power I need.
And I can pay Tesla 4.5% for the next 30 years.
I figured out why Elon Musk is rich.