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| Solar power will be mandatory in the new Canberra suburb of Jacka, on the city's northern fringe. (ABC News: Briana Shepherd) |
Key Points
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The proposal would benefit up to 500 homes in Jacka, a community that will have solar cells on every roof.
If it goes ahead, it will store households' unused energy, earning them more money and preventing their excess electricity from destabilising the power grid — a problem of growing concern to the grid's operator.
It will also allow more people to benefit from battery technology, which to date has been used almost exclusively by wealthy households.
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| A concept image of a residential community battery. (Supplied: ARENA/Synergy) |
'Cheaper and more efficient'
Community-scale batteries are not yet used in Australia's biggest energy network, which includes South Australia and all eastern states.
However, modelling by Australian National University (ANU) researchers shows the mid-sized batteries can be cheaper and more effective than household batteries.
A research leader of the ANU's battery and grid integration program, Marnie Shaw, says Australia has the world's highest rate of rooftop-solar generation, and needs ways to store that electricity.
"Batteries save households money because they allow you to use solar energy that you produce during the day later in the evening when you need it, and that energy will be cheaper than buying energy from the grid," she said.
"So having any kind of battery storage will be cheaper for households.
"But community batteries can provide that household storage for potentially more houses more efficiently, and potentially be less costly."
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| Dr Marnie Shaw's modelling suggests community batteries can save households more money and better protect the power grid. (ABC News) |
But one of the main beneficiaries would be the power network itself, as the battery would substantially reduce the amount of solar energy flooding the grid during daylight hours.
Batteries can stabilise the grid
Last month, the Australian Energy Market Operator (AEMO) said it needed the power to stop households exporting their excess electricity at critical periods, to avoid damaging the grid.
Its chief executive, Audrey Zibelman, said AEMO would do this only during emergencies.
"This is very temporary, very limited and, really … a last-resort control we need if we were worried the system would otherwise go black," she told 7.30.
However, the growing use of batteries is already beginning to solve this problem.
Dr Shaw's early modelling suggests household batteries can lessen potentially damaging energy flows during peak periods by about 25 per cent, while a community battery can be up to twice as effective.
But she says all types of power reserves — home, community and large-scale — are important for the network.
"We need storage at different levels across the electricity grid for the best outcomes."
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| One of the Hornsdale Power Reserve's biggest successes has been in protecting the grid from voltage surges. (ABC News) |
The ACT passed a milestone last year when its entire electricity use was matched by purchases from renewable sources.
This means Canberra is now effectively 100 per cent powered by green energy, though still reliant on Australia's main grid.
Deputy Chief Minister Yvette Berry said suburban planning was an important part of fighting climate change.
However, the Jacka battery remained a proposal at this stage, which the Government was examining with the ANU and power utility Evoenergy.
"There's a lot of work to do in that space, because innovation is happening every day in battery storage and solar energy," she said.
"So we want to make sure we get it right.
"But we've got a really great opportunity here in the ACT through the development of a new suburb in Jacka, to try some new and different things."
The Government is also trialling other ways to improve green energy use and efficiency in new suburbs.
In Whitlam, for example, it is subsidising home owners who buy rooftop solar, electric vehicle charging points and efficient appliances.
However, Dr Shaw said one of the main advantages of a community battery, compared with other initiatives, was it could benefit a wider range of people.
"This is one of the problems with household batteries — they require a large upfront investment and that's out of reach for some people."
Links
- Solar Upgrades For ACT Public Housing, First Batteries For Schools
- Community Batteries Benefit The Grid More Says Latest Research
- Canberra will be home to one of Australia's biggest batteries as ACT weans off fossil fuels
- 10 Hot Trends Shaping Australian Clean Energy
- Coal To Be Kaput In Australia By 2050, As Renewables, Batteries Take Over
- How Elon Musk's Big Tesla Battery Is Changing Australia's Power Landscape
- Stunning Drops In Solar, Wind Costs Mean Economic Case For Coal, Gas Is ‘Crumbling’
- Charging Ahead: How Australia Is Innovating Battery Technology
- Natural Gas Killed Coal – Now Renewables And Batteries Are Taking Over
- 'Paying for the mistakes of others': Why energy bosses want to be able to shut down household solar
- Power grab: Authorities look to control household solar systems to stabilise the grid
- Here's how the ACT has 100 per cent renewable power from today
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