The NSW government has called on business to pitch projects for its $4.4 billion renewable energy zone to kick-start investment, amid a slowdown in new wind and solar commitments due to national energy policy uncertainty and a global recession triggered by the coronavirus.

Wind, solar and energy storage companies have two weeks to flag interest in building parts of the 3000MW renewable energy zone (REZ) in the central south-west, centred around the town of Dubbo.