The Epitwin Project is the brainchild of Tim Spector, who heads the Twin Research Unit at St Thomas's and is Professor of Genetic Epidemiology at Kings College London.
The council said the project was only possible due to a government subsidy which made a payment for every unitof electricity generated by solar panels.
The project accelerated late last year after Gordon Shank, then president of Levi's Americas unit and now Levi's chief marketing officer, visited a customer-service center and heard the frustration firsthand.