The Berejiklian government has approved 11 large-scale solar energy plants in the past 12 months, clearing the way for NSW to join a "tsunami" of new renewable energy capacity across the nation.

The 170-megawatt Finley Solar Project in the Riverina, which will include half a million solar panels, is the first to get approval in 2018.

The 10 to get the go-ahead in 2017 doubled the number in the previous year, and alone supported 1800 construction jobs, Planning Minister Anthony Roberts said.

Those 10 "collectively reduce carbon emissions by over 2.5 million tonnes, which is equivalent to taking around 800,000 cars off the road", he said.

NSW had more renewable generation capacity under construction than any other state, Energy Minister Don Harwin said.