Yes, but once again, I come back to the cost of producing the energy. For the next 20 years, the system would produce energy at a cost of 5 to 6¢ per kilowatt/hour, which is less than the cost of electricity. It would not be unreasonable to say that the time required to recover the investment is 10 years.
On May 28th, 2007. See this statement in context.