They now sell them via the stores, the internet, and direct marketing to their car customers. There isn't as much revenue here, but presumably it isn't unprofitable now.
Regarding the plans for ramping this year, I have similar concerns to you. Having said that, there are sources for a claim of ramping this year. Quoting Elon Musk on the Q1 2019 earnings call:
"And then the Solar Roof tile, we are on Version 3 of the design. That necessarily takes a while to scale up because we have to be confident that the Solar Roof is going to last on the order of 30 years and because the warranty is sort of 20, 25 years and so the rate at which you can iterate on Solar Roof is necessarily slowed down by [indiscernible] which you can do accelerate aging on the roof and we want the installation process to be simple and easy, which is actually the Tesla Buffalo factory a few weeks ago and I was pretty impressed with the team and we are looking forward to scaling that up significantly through the balance of this year and next."
From the same call:
"We also have – we are also finding a significant increase in retrofit solar this year, because we have finally refined the product offering to be something that’s extremely compelling and much more cost efficient to deliver and install."
Obviously there are no numbers there, so who knows what a "significant increase" is in this statement.