We see a range. We work with industries that for a one-year payback wouldn't even invest, for different reasons that I can go into in more detail. We see the five- to 10-year payback being acceptable in the institutional sector. Whatever it is—which is less than 10 or 15 years—at the end of the day it's still more rational to do that, because you will provide energy at zero cents. Whatever the cost of the supply side at the end of the day—
On November 27th, 2018. See this statement in context.