It seems Mr. Musk is taking solar panels to a new level (see NY Times article below).
Given that he is focused on sustainability and a clean environment, wouldn't HPQ's proprietary Si production method be a perfect fit? If I were running the show (assuming we have a legal lock on the technology at present) I'd make sure Tesla knows about us asap. Could be a match made in Heaven.
http://www.nytimes.com/aponline/2016/10/29/business/ap-us-tesla-solarcity.html?_r=0