Consumers look at off-grid options amid talk of tariffs


The Australian arm of South Korean solar module maker Hanwha Q Cells has revealed it is receiving an increasing number of inquiries from installers and residential customers looking at going off grid as policy makers contemplate a raft of changes designed to make room on the grid for more renewables including rooftop solar PV.

Australia’s booming rooftop solar market delivered a record-breaking 2.6 GW of rooftop solar in 2020 while another 4 GW is expected to be installed this year. Despite the benefits, the proliferation of small-scale solar has increased the pressure on grid infrastructure which was built when power only flowed one way.

Accordingly, the Australian Energy Market Commission (AEMC), the governing body responsible for making the rules for the national electricity market, has unveiled a draft determination on distributed energy resources (DER) designed to ease the pressures on the grid as the boom in rooftop solar continues.

Included in the reforms package is a proposal for a two-way pricing mechanism – labelled by some as a sun tax – which would allow distribution networks to reward DER owners for sending power to the grid during peak demand periods and to charge them for sending power when it is not needed.

Q Cells Australia marketing director Myung Shim told pv magazine the talk about export charges had initiated plenty of discussion in the rooftop solar PV sector with “more and more installers and consumers thinking about going off grid”.

“The level of inquiry around going grid independent – what are the options and alternatives to being dependent on the grid – has been rising and it’s understandable,” she said.

“Even if you don’t understand what all these energy management systems and policy changes are, in the end, if you are asked to pay for something that you didn’t have to pay for in the past by the grid operator or network provider, of course you will think about options.”

Energy storage systems are attracting renewed interest.

Image: Q Cells

Shim said those options include batteries with the proposed rule changes sparking renewed interest in energy storage solutions.

“Contrary to all the research in the energy market, Australians have been putting off buying or installing batteries, but people are now thinking a battery is something they should install soon, not look at as a future investment,” she said.

“Now they are saying maybe I can have this solar system and battery installed and perhaps I can go 100% off grid. I will have my own generated energy, I will maximise my self-consumption and if I have something left over, I can store it and then I can sell it when I can make extra revenue at the most attractive nominal value.”

More than 2.6 million Australian houses already have solar modules installed on their roof, and that number is expected to double in the next 10 years.

Conservative estimates suggest Q Cells commands about 12% of Australia’s annual rooftop solar PV market and Shim, who confirmed more than 85% of the company’s revenue comes from residential and small commercial rooftop, said Q Cells is conscious of its responsibility to help deliver a solution which will allow more small-scale renewables into the electricity grid.

Q Cells Myung Shim says technology will be critical for the integration of DER into the grid.

Image: Hanwha Q Cells

Shim said while talk of tariffs had dominated discussions since the AEMC had released its draft determination, technology will be critical to solving the problem of ‘traffic jams’ on the network.

“It all ties back into technology,” she said. “No matter what, this whole conversation leads to the demand for more sophisticated energy technology.

“On our end, it’s all about making sure we build on our quality hardware and we integrate and work with partners who actually provide the technology that optimises the solar system that is on every household and at the same time helps the grid and network industry players have visibility over the situation on a real-time basis.

“It’s about us as manufacturers trying to really keep up and be aware of trends and changes in the market. Whether it comes from the regulation perspective, whether it be behavioural change from consumers, we need to keep investing, not only on our product level but in technology.

“Not just modules but inverters, gateways, batteries, energy management subscription services all these things that actually make up our solar systems.”

The final determination on the AEMC’s draft rule is due for release next month.

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