Solar bonanza: Merchant revenues soar to highest level in two years as gas generation hits all-time low - Renew Economy

Merchant solar revenues in Australia have reached their highest level in two years, while gas generation has fallen to an all-time low. The data reflects a combination of factors: rising solar capacity on the grid, high wholesale prices driven by peak demand periods, and increased reliance on solar output to meet daytime load. Gas plants are running less frequently, a trend the article frames as progress toward decarbonisation.

Where this fits

This story illustrates the core reliability problem that Energy Realism tracks. High merchant revenues for solar sound like market success, but they reflect volatility in wholesale prices, the gap between cheap solar midday and expensive peak hours when solar cannot generate. That gap is being filled by gas. A grid with falling gas generation on average but rising gas utilisation at critical times is not decarbonising; it is fragmenting. Gas becomes a peaking plant, running at lower capacity but essential at dusk. The alternative, firm, dispatchable nuclear power, would flatten that revenue curve by supplying steady output around the clock, but remains prohibited by law.

What it means

Australia's grid is becoming more weather-dependent, not less. Low gas generation on average masks high gas generation at the margin, when solar cannot deliver. This makes the grid vulnerable to extended cloud cover or equipment failure during peak demand. Supply-chain resilience is also at stake: solar panels, inverters and batteries are predominantly manufactured in or dependent on China, leaving Australia's power system strategically exposed. A diversified grid with Australian-owned nuclear capacity would reduce both the physical weather risk and the geopolitical dependence that this headline obscures.