Rooftop Solar Sets Record, Surpassing 117% of State Demand with Huge Battery Backup
South Australia has achieved a remarkable milestone in renewable energy, marking a new record with its rooftop solar systems. The state has surpassed 117% of its underlying electricity demand during peak solar generation times. This achievement highlights South Australia’s leading position in renewable energy integration.
Record Solar Generation on Public Holidays
On Christmas Day, at 1:30 PM, South Australia recorded a negative demand of minus 263 megawatts (MW). The drop in grid demand was consistent with the holiday’s reduced consumption patterns. The region’s rooftop solar facilities met an impressive 117% of the electricity demand during this time.
The trend continued into Boxing Day, where rooftop solar accounted for 110% of the state’s demand, leading to a minimum grid demand of minus 165 MW. According to the Australian Energy Market Operator (AEMO), the state experienced rooftop solar meeting 100% or more of its underlying demand in nine half-hour intervals across these two holidays.
Annual Performance and Grid Transformation
Throughout the past year, South Australia has demonstrated a significant shift towards renewable energy, achieving 75% of its electricity generation from wind and solar sources. The state aims to reach a target of 100% net renewable energy by the end of next year, a goal unmatched by any other Australian state.
- First record: 117% of demand on Christmas Day
- Second record: 110% of demand on Boxing Day
- Negative demand: Recorded at -263 MW and -165 MW respectively
South Australia is the only state in Australia to experience negative demand due to its high penetration of rooftop solar. This unique situation allows the state to export excess electricity to neighboring jurisdictions, such as Victoria and New South Wales, while simultaneously maintaining a reliable grid.
Infrastructure and Future Developments
Looking ahead, the state’s capacity to manage and export renewable energy will be bolstered when the upgrades to its interconnection with New South Wales are completed. Currently, the energy link can export 150 MW, but this will increase to 800 MW post-upgrade. This enhancement will help minimize the curtailment of large-scale solar and wind energy resources.
During peak solar production days, AEMO had to ensure grid stability by directing operations at Neoen’s Blyth battery, which is the largest in the state. This battery provided essential services to maintain a stable electricity supply and to respond to the fluctuating system demand.
Overall, South Australia’s record achievements in rooftop solar generation signify a transformative period in renewable energy. The state continues to lead efforts in creating a sustainable and reliable energy future for Australia.
