When and how will SolarCity invest $5 billion in Buffalo? That part of the contract is blacked outSolarCity Corp ( SCTY) is building one of the world’s largest solar panel manufacturing plants in Buffalo, New York. The company reached a deal with New York Governor Andrew Cuomo in September. Cuomo said the NY state would spend a huge $750 million in taxpayer money for the plant. In return, the San Mateo-based solar installer agreed to invest $5 billion in the state over the next 10 years, creating more than 2,900 jobs.