When a recent heat wave hit the Australian state of South Australia, on-site solar installations contributed significantly to reducing peak demand and electricity costs.
As temperatures rose to record highs in January, rooftop solar photovoltaic installations covered between 6% and 9% of the state’s total peak demand.
According to reports, rooftop solar power has regularly provided 15%-25% of South Australia’s electricity demand during lower demand times.
South Australia has the highest penetration of rooftop solar in the country, with around 450 MW. The Australian Energy Market Operator (AEMO) said that the state’s large amount of rooftop solar power has also helped to shift peak demand.
‘The contribution of solar is a noticeable percentage of the total demand in South Australia,’ AEMO said in a report. ‘The data indicates the solar could be contributing to shifting the time of the peak demand in South Australia during the high demand days.’
Rooftop installations make up around 90% of Australia’s installed solar capacity.