The search engine and the bank have invested $314m in the largest US wind energy project in less than two months.

US-based search engine Google and US-based bank Citigroup have invested an additional $204m in Alta Wind Energy Center, the largest US wind energy project.

Alta Wind said it would use the money to develop its fifth wind project, and it follows the two corporate investors last month investing $110m to build its fourth project.

Alta Wind, which is a wind centre based in Tehachapi, California, said the money would give it a generating capacity of 1,550 megawatts (MW), making…