Annual US wind operations and maintenance (O&M) spending is expected to increase 50% from present levels to more than $7.5bn by 2030, driven by the ongoing rapid expansion of the nation’s turbine fleet, according to a new IHS Markit report.

It notes that the expiring federal production tax credit (PTC), the industry’s main subsidy, plus technology advancements have triggered heavy investment in new wind projects with $12bn in capital spending alone in 2018.