Another way to look at it: how big is the global market for gas peaker plants? If current trends continue, solar PV + batteries will be cheaper at some point than any fossil fuel[1], so at that point Telsa energy will begin to consume large chunks of that market.
According to this link[2] gas peaker plans were 50% of energy installs in 2013, the best link I could find from a quick search.
According to this link[2] gas peaker plans were 50% of energy installs in 2013, the best link I could find from a quick search.
[1] Interesting talk on this topic: https://www.youtube.com/watch?v=Kxryv2XrnqM
[2] http://www.eia.gov/todayinenergy/detail.php?id=15751