An energy production and trading scheme designed for the Tonsley Innovation District in Adelaide will incorporate one of Australia’s largest rooftop solar arrays to provide energy to businesses and homes within the growing precinct.
The South Australian project will be delivered by Enwave Energy, a subsidiary of Enwave Australia.
Enwave Australia CEO Cameron Evans said Enwave Energy would invest about $40 million over a 50-year period for photovoltaics, battery storage, smart technologies and future electrical assets.
“We take a long-term view of these projects, which enable us to build our return over a long time,” he said.
The District Energy Scheme will use energy generated by about 20,000 solar PV panels installed on the expansive eight-hectare roof of the former Mitsubishi factory building and adjoining TAFE SA building.
A battery storage solution will be added to the 6MW solar array when demand for the service increases. This is likely to be when the Tonsley site grows to include residential housing and more industry.
“We’ll have an existing connection with the grid as well as having some onsite generation, primarily utilising solar PV and that enables us to draw on either the grid or our own energy generated on site depending upon the time of day, the amount of energy available,” Evans said.
“The benefits of that approach means that we increase reliability to the site by having on-site generation while also ensuring we can provide a competitive energy cost by being able to either draw on our own energy sources when the grid pricing is high or utilise the grid when we don’t have solar available or during off-peak times.”
Enwave Australia is owned by Brookfield Infrastructure, which designs, builds, owns and operates water, gas and energy networks for entire communities.
Evans said the District Energy Scheme would also integrate a range of smart technologies and networks to monitor and regulate the system.
“A smart management system enables us to optimise the time at which we either take energy from the existing grid or we utilise the generated energy from the site or when we utilise our storage,” he said.
Businesses at Tonsley have the choice to buy their electricity from either Enwave Energy or an energy retailer of their choice.
Other components of the District Energy Scheme will include recycled water and thermal energy utilities facilitated by on-site infrastructure.
“We have an agreement with one of the local councils to take storm water which we’ll then treat, turn into recycled water and reticulate to a number of customers in the precinct for non-potable uses,” Evans said.
“Similarly, for thermal energy, we’ll provide some chillers and boilers which will enable us to reticulate it in the form of either hot and cold water to be used by buildings to ensure efficient processes around the way in which they are cooled or heated.”
The company is expected to establish a five-person office at the Tonsley precinct by October and commence the installation of the solar array and key assets next year. The solar system is expected to be fully operational by the second half of 2019.
Tonsley is managed by Renewal SA on behalf of the South Australian Government and is the home of leading firms in the renewable energy sector, including SIMEC ZEN Energy, Tesla, AZZO and Siemens.
Renewal SA General Manager of Property Mark Devine said the Enwave proposal would deliver on Tonsley’s commitment to become a climate smart district.
“The scheme will help consolidate Tonsley as a hub for renewable energy investment and innovation and help to attract more businesses keen to establish in an environmentally sustainable innovation district,” Devine said.
The scheme highlights South Australia’s leadership in the adoption of renewable energy.
In November 2017, Tesla commissioned the world’s largest lithium-ion battery (100MW/129MWh) at Neoen’s Hornsdale Wind Farm in South Australia’s Mid-North.
SolarReserve has announced a $650 million Aurora Solar Energy Project, involving the development of a 150MW solar thermal plant in Port Augusta, the largest of it’s kind in the world.
South Australia leads the nation in wind energy and rooftop solar with renewable sources accounting for almost 50 per cent of the electricity generated in the state.