SA Power Networks supports rule change for more rooftop solar

Rooftop solar panels on homes with tiled roofs (potential)
Image: Shutterstock

SA Power Networks has joined organisations including the Total Environment Centre, Australian Council of Social Service (ACOSS) and St Vincent De Paul in proposing a review of electricity rules to ensure they support the continued growth of rooftop solar and other Distributed Energy Resources (DER) in Australia.

In 2019, the Australian Energy Market Commission (AEMC) initiated a cross-sectoral group to review access and pricing issues for DER, including rooftop solar. Most parties involved agree that a rule change is necessary, but any changes approved by the AEMC should provide customers with significant notice. If approved, they would not be implemented in South Australia until 2025 at the earliest.

SA Power Networks is proposing a rule change that would ensure:

  • Customers have the right to be able to export energy to the grid from rooftop solar and other DER;
  • Networks invest efficiently to support the continued take-up of solar PV; and
  • Costs to support solar PV are fairly allocated between customers and in a way that is revenue neutral for distribution networks.

SA Power Networks general manager strategy & transformation Mark Vincent said, “We believe the rules need to be relevant to a 21st century system that increasingly is about DER. After more than 10 years of customer investment in DER, particularly rooftop solar, the rules need to catch up and facilitate future investment in solar and emerging technology such as batteries and electric vehicles.”

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The issue needs addressing as many electricity networks are reaching their capacity to support DER and new investments are required to support additional DER take-up.

“Our primary aim is to ensure we can continue to support our state’s exciting transition to a net-100 per cent renewables energy supply by 2030,” Mr Vincent said.

“We need clear rules that ensure we make appropriate investments in the network that support the choices being made by customers, including those investing in solar, batteries and electric vehicles in the future.

“Customers would be surprised to know that they don’t have a right to export energy from their systems under the current national electricity market rules. Equally, network businesses like us have no clear guidance on the extent to which we should invest to support solar PV and other DER. We also think it’s important for the rules to consider, and provide guidance, as to who should pay for any required investment.

“If the pricing aspect of the proposal is approved, we would expect to see a modest increase in network charges for exports by new solar and other DER customers, although this would be offset by reductions in consumption charges and potentially rewards for exporting energy at certain times – for example by discharging energy stored in batteries at times of peak demand.”

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“We are proactively thinking about how the rules can best facilitate networks to continue to provide services to customers in the most efficient way possible. We already have nearly 1500MW of solar generation on customers’ rooftops in SA and demand is continuing.

“We want to accommodate even more solar on our network and provide services that help maximise the benefit of customers’ investment in DER for the community.

“There is strong stakeholder support for the proposal, including from some in the solar sector and representatives of vulnerable customers. We also recognise some stakeholders are opposed to any change, but we think it is appropriate and time to weigh up the issues and make a decision that gives clarity for everyone. In submitting our proposal into the AEMC process, we seek to complement the work and overall objectives of these other rule change proponents by providing our perspectives and experiences as the distribution network at the forefront of Australia’s energy transition.”

There currently is no clear regulatory framework specifically applying to the provision of network support for the rapidly growing amount of rooftop solar generation. In 2019, the Australian Energy Market Commission (AEMC) asked the sector to think broadly about the challenges and opportunities of distributed energy such as solar and changes needed to promote customers’ interests. After participating in an AEMC-facilitated forum, the TEC, ACOSS, St Vincent De Paul and SA Power Networks have all submitted proposals on the issue to the AEMC.

SA Power Networks has submitted a proposal that would require minimal rule changes by aligning proposed new rules to be applied to supporting new solar investors with those already in place in relation to delivering energy to customers. The changes are not proposed to apply to existing solar customers initially but could over time.

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