The rise of rooftop solar panels and home batteries is a game-changer for Australia's electricity networks, but it's also a challenge. Networks are facing a revenue crisis as their traditional business model is being disrupted. The future of energy is at stake, and it's time to rethink how we approach network pricing and incentives.
Australia's electricity networks, which have long relied on a regulated revenue model based on throughput, are now struggling to adapt to the rapid growth of decentralized energy sources. The problem is simple: as more households generate their own electricity and consume it directly, the networks' revenue streams are drying up. But here's where it gets controversial: should networks be allowed to increase fixed charges to make up for lost revenue?
Let's dive into the data. Despite a 5.8% increase in customer numbers, energy supplied by transmission to local networks has dropped by a staggering 10%. Peak demand remains flat, indicating a decline in network capacity utilization. This trend is only set to continue as home batteries become more popular, further reducing both exports to and imports from the grid.
As regulated monopolies, networks are entitled to a fixed annual revenue, but this approach is unpopular with everyone except network owners. With falling volumes and constant revenue, prices must rise, creating a vicious cycle. Networks also struggle to influence consumer behavior, as the regulator is the true customer of the network.
The value of a network is largely fixed, driven by the capital cost of installation. Once the infrastructure is in place, whether you charge a fixed or usage-based fee has little impact on investment. This means that how we charge households is a policy decision with far-reaching implications. Do we want customers to export excess energy, self-consume, or share it within their communities?
I believe we should encourage self-sufficiency and electrification. Consumers should be empowered to use electricity efficiently, adopt electric vehicles, and reduce their reliance on gas. Overhead lines are vulnerable to storms and fires, and self-reliance is a more resilient approach. With plenty of capacity and declining throughput, we need to rethink our energy policies.
The data shows that transmission-supplied volumes to distribution networks have fallen by 10% since FY19, primarily due to the growth of rooftop solar. Customer numbers continue to rise, but revenue remains flat in nominal terms. Non-residential revenue is a significant portion of the mix, with high volumes at half the price.
So, what's the solution? I propose embedding some or all of the regulated asset base (RAB) into the house price. This would eliminate the EV:RAB premium and make network costs more transparent. It would be similar to paying for a subdivision road upfront rather than through ongoing charges. While this idea requires significant policy change and raises questions about existing properties, it's worth discussing to reduce bureaucracy and overhead.
The data tells a clear story: networks are facing a structural challenge, and the current push for higher fixed charges is not a sustainable solution. We need to prioritize household and business electrification, and deeply embed the carbon objective into network pricing rules. Fairness to future generations and incentivizing competition within the network are key considerations. Let's spark a conversation and find innovative solutions to this complex issue. What do you think? Are there alternative approaches we should explore?
