Gippsland Water has switched on the largest floating solar array in Australia at its Drouin wastewater treatment plant.
The 350-kilowatt system features 644 individual solar panels and floats on one of the plant's treatment lagoons.
Acting managing director Simon Aquilina said the solar panels were part of the organisation's commitment to renewable energy targets.
"These solar panels will help us reach our renewable energy target of 100 per cent by 2025 and contribute to achieving our target of net-zero greenhouse emissions by 2030. They also positively impact the wastewater treatment process by reducing evaporation.

"Solar energy helps reduce our operating costs and puts downward press