Renewables surge past 50pc but next phase proves harder - The Australian

Renewables generation in Australia has crossed 50 per cent of the grid's output. The article flags that moving beyond this threshold will be harder than the first half, requiring greater transmission investment, storage capacity, and grid management to handle the variability of wind and solar output.

Where this fits

This is the cost and reliability inflection point Energy Realism has tracked. The first 50 per cent of renewables is cheap per megawatt-hour and sits where wind and solar have natural resource advantages. The next 50 per cent requires a complete parallel infrastructure: transmission lines to move power from remote generation zones to population centres, battery storage to bridge hours and days of low output, and gas plants kept hot for firming. These costs are not in the headline. They are systemic, they are rising, and they are being borne by consumers and taxpayers, not the renewable-equipment suppliers. Sovereignty matters here too: batteries, inverters, and panels come from China's supply chain, deepening strategic dependence as storage scales.

What it means

Australia is now at the hard part. The easy wins are behind. Every percentage point added from here forward compounds the need for dispatchable backup, and Australia has chosen gas and batteries rather than the alternative: firm, low-emission nuclear generation, which is legally banned. A nuclear-heavy grid would require fewer transmission overbuild, less battery material, no gas firming, and no China supply-chain lock-in. Instead, Australia is locking in decades of gas dependency and mineral imports to achieve the same decarbonisation goal at far higher whole-system cost.