We have a Spanish tile roof and I was recently told by a Tesla Energy sales rep that they will not install solar panels over clay tiles. In fact, Tesla declined to even schedule a visit to work up a quote. I explained that our roof was recently redone (2011) with a modified bitumen torch down underlayment (instead of traditional felt paper). This means the tiles are mostly decorative. The sales rep may not have understood this distinction, but still insisted that Tesla will not install over clay tiles. I'm also curious if Tesla allows other solar companies to resell the Powerwall 2. We have a local solar installer (who WILL work over clay tile) that claims to be a "Certified Tesla Energy Powerwall Provider", but I haven't been able to confirm if this is true. We're planning on a 10kW install with two Powerwalls.