Vaisala played a critical role in supporting SunEdison Inc., and its power-plant holding company, TerraForm Power Inc., in the US$ 2.4 billion purchase of First Wind Holdings Inc. in late 2014.
With the purchase of First Wind, TerraForm gained 521MW of active wind and solar power plants and more than 8GW of total pipeline, backlog, and leads. Prior to finalising the deal, asset valuation was required to determine the worth of First Wind's existing portfolio. Vaisala was selected by SunEdison to deliver the necessary analysis to evaluate key development assets. Vaisala completed analysis on 377.5MW, or nearly a quarter of First Wind's development portfolio, on an accelerated timeline to accommodate the transaction. This work entailed quality control analysis of available meteorological tower data at the project sites to deliver long-term net production numbers, calibrated to local conditions, with all loss values incorporated (such as, wake deficits, extreme weather, and electrical and grid downtime).
