Billionaire Warren Buffett’s MidAmerican Energy aims to add some 2GW of onshore wind generation capacity by late-2024 to its US industry-leading project portfolio, a high-profile boost for a sector losing market share as the energy transition accelerates.

Iowa utility regulators have set a hearing from for the end of October to consider a determination for MidAmerican’s proposed 11 ratemaking principles to govern cost-recovery for its $3.9bn Wind Prime project which would include up to 50MW of PV plant built on-site.