Australia’s Grid Hit 80% Renewables — Rooftop Solar Carried More Than Half

Australia — Here's what just hit the grid desk. On **Saturday 19 September 2026**, renewable energy met **more than 80% of demand** on the National Electricity Market for the first time — and the quiet giant behind the milestone was **rooftop solar**, which was meeting **more than half of demand** at the peak moment.

Did you know the record could have gone higher? More than half of available **wind** and nearly half of **large-scale solar** were being **throttled** at the same time — not because the weather failed, but because the system is not yet ready for 100% renewables with coal and gas fully offline.

You are the hero of this story. Household roofs helped push the share past 80%. Home batteries are how you **stake your claim** on midday surplus instead of watching the grid dump it. Invest in your independence at the meter — not only on a RenewEconomy chart.

Source: Giles Parkinson / RenewEconomy, 19 Sep 2026 (with GE Nemlog / Geoff Eldridge notes as reported there).

What actually happened on Saturday (label as report)

• Renewables as a share of total NEM demand hit about **~80.5%** at **12:25 pm Saturday** (one data source put it near **~81.5%**), beating the prior record of **79.6%** set the day before.
• **Rooftop solar** was meeting **more than half of demand** in that window.
• **Coal** was pushed down to about **~18.8%** of demand — roughly as low as those units typically go without switching off.
• Heavy **curtailment**: more than half of available wind and nearly half of large-scale solar output were throttled even with near-record storage on the system.
• Around **12:30 pm**: roughly **~8.42 GW** of large-scale wind + solar (about equal split), with significant curtailment on top.
• By **13:50 AEST**, GE Nemlog’s Geoff Eldridge noted around **~54.8 GWh** of renewables already curtailed while flexible loads absorbed about **~22.5 GWh** — including roughly **~17.3 GWh into batteries** and **~5.2 GWh into pumped hydro**. Batteries were charging around **~4.5 GW** while another **~8.4 GW** of available renewable output was still being curtailed.
• Eldridge also flagged **behind-the-meter home batteries** as meaningful absorption capacity during the first 80%+ interval.

Those figures are **report / operator-data claims** as published by RenewEconomy. They are not a retail quote for your suburb tonight.

Why the grid throttled “good” wind and solar

Curtailment here is not a moral failure of panels. It is the system saying: rooftop is already covering a huge slice of demand, coal cannot drop further without switching off, and AEMO still needs confidence that **grid-forming inverters** can cover security needs if thermal plant is fully offline. Until that bar is cleared, surplus large-scale renewables get turned down — for price (below-zero) and for congestion/security.

That is the same evening-peak story homeowners already feel as the duck curve: midday sun is abundant; dinner still spikes when rooftop falls away. See duck curve Australia — evening peak.

The homeowner twist: soak the surplus you already paid for

Big batteries and pumped hydro absorbed tens of gigawatt-hours that afternoon. Home batteries are the behind-the-meter version of the same play: store your midday sun, spend it when the grid is expensive or when export is soft.

If panels alone feel cheap enough that the hard questions moved past module price, you are not alone — see cheap solar panels, grid strain, and what homeowners should do. Generation without evening control still leaves the peak on the grid’s terms.

Soft path only if you are shopping storage: federal Cheaper Home Batteries support is typically framed around / up to ~30% off eligible batteries — eligibility depends on property and current rules; never invent a dollar figure. For who actually wins on the rebate math, see federal home battery rebate Australia — who wins.

Bottom line

The NEM crossed **80% renewables** for the first time with **rooftop solar** carrying more than half of demand — and with wind and large-scale solar still being throttled hard. That is not a reason to wait for 100% headlines. It is a reason to **own the hours** at your meter: rooftop + home battery so midday surplus becomes evening independence. Stake your claim on the stack you can install under today’s rules.