ScottishPower Renewables posted a full year profit of almost £458m in 2018, up a third from £343m a year earlier due to increased wind generation.
Wind power production from the Scottish Power unit increased to 4568 gigawatt-hours, some nine percent higher than in 2017.
The company said that rise in output followed the completion of a £650m investment programme to build eight new onshore windfarms in Scotland.
SP Energy Networks, the company’s grid business, notched a five percent increase in profit to £813.4m, while earnings from its supply arm nearly tripled to £271.8m.
“Last year was a pivotal year for ScottishPower as we completed the landmark journey from coal and gas to 100% green power by selling our generation business,” said Scottish Power chief executive Keith Anderson said.
“In renewables we saw the first full year of output following our investment in onshore wind in 2017 and this has seen an increase in electricity generated and excellent progress has been made on delivering the £2.5bn East Anglia 1 project,” he added.
First export of power for EA1 is expected in 2019, with full operation during 2020, the company said.