"Benson calculates his $150,000 system saves him $25,000 annually and so should pay for itself in about five more years. To boot, he expects it to remain operational for at least 20.
'I figure that when they plant me in the ground, one of my sons will run this place,' he said. 'I wouldn't be surprised if, 30 years from now, this laundromat and this solar system is still working.'
The techno"