Transport companies that operate electric-powered buses and trams can help balance renewable power grids by “sucking up” excess energy during the day and using it to recharge batteries, says Kelsian Group chief executive Clint Feuerherdt.

Kelsian, which has an expanding fleet of battery-powered electric buses in Australia, could potentially use up extra renewable power during the middle of the day (when it is not in high demand from households) to charge its buses, Mr Feuerherdt said.