Full article available on pv tech.

“Staying in the US, a study conducted by analytics firm kWh Analytics found what it deemed to be a “troubling reality” in October, revealing that swathes of completed solar farms in the country were underperforming against original projections. From a sample of projects assessed, kWh projected that more than 30% of solar farms had missed their productions targets by more than 10%, even accounting for weather fluctuations. The company had suggested that developers may have been too optimistic when taking into account technology evolution.”