Tesla’s Solar Roofs are popping up in California — even for non-employees and customers who don’t own a Tesla vehicle, CleanTechnica reported. They pointed to several Twitter posts that give us a closer look at Tesla’s much-anticipated new product and how it works in the real world.

Tesla is apparently installing their Solar Roofs in low volumes near their factory in Fremont, California, according to CleanTechnica. Twitter users who posted pictures of their roof installations listed their locations in places like nearby San Jose.

Related: Tesla is selling its solar products in Home Depot stores starting in July

Images from user @Toblerhaus reveal the tiles arrive in “blocks of a few tiles,” according to CleanTechnica. This could help streamline installation and wiring and lower points of failure from that wiring, which is tucked into the roof tile supports to keep it protected from sun or rain.

@Toblerhaus’ images also reveal more details of the roofing process. There’s a water barrier and then a wood structure atop that serves a dual purpose: keeping that barrier down and offering a surface on which to mount the solar roof tiles. CleanTechnica said the underlayment is InterWrap‘s Titanium PSU 30, which boasts a limited lifetime warranty. Tesla’s solar roof tiles come with their own lifetime warranty, according to CleanTechnica.

Twitter user @triduchuynh shared images of an installed roof and three Powerwalls, and said they’re just awaiting their Model 3. Tesla says on their website their Solar Roof can power a whole home entirely with renewable energy when combined with a Powerwall.

On March 31, @Toblerhaus said the roof was up and running, and while it was cloudy outside, the output was five kilowatts. @triduchuynh confirmed to Inhabitat on Twitter they’re still waiting for Pacific Gas & Electric (PG&E) to turn their Solar Roof on.

Via CleanTechnica

Image via Tesla