Batteries Mean the “Base Load” Myth is Dead

For years, coal, gas and nuclear advocates have regurgitated the same argument: renewables can never replace “base-load” generation because the sun doesn’t always shine and the wind doesn’t always blow.

That argument is now dead. Not because physics changed. Not because climate activists won a slogan war. But because batteries have changed the economics of electricity systems faster than governments, media commentators and energy companies have adapted.

A major new report from the International Renewable Energy Agency (IRENA) has confirmed that renewable energy combined with battery storage can now provide reliable, round-the-clock electricity at lower costs than fossil fuels or nuclear.

This matters. Because “base-load power” has long been used as a rhetorical shield protecting coal and gas from scrutiny. More recently, it has also become the central political argument for nuclear power ideologues in Australia. We’re constantly told that modern economies require giant spinning power stations running 24 hours a day or the grid will collapse and we’ll all be left sitting in the dark.

But modern electricity systems don’t actually need inflexible and outdated “base-load” generation. They need something much more sophisticated: flexibility, storage, transmission and smart demand management. Ironically, old coal plants are often terrible at this. They were designed for the 20th century when demand was relatively predictable and generation was centralised. Modern grids and demand work differently. Solar floods the system during the day. Wind often peaks overnight. Batteries smooth peaks and troughs. Smart systems shift demand in real time. Hydropower, pumped hydro and interconnectors provide additional backup.

The result is a far more dynamic and flexible system. And batteries are now the key technology making that possible. The cost of battery storage has fallen by more than 90 per cent since 2010. That’s one of the fastest industrial cost declines in modern history. What once seemed futuristic is now rolling out at extraordinary speed across Europe, China, Australia and the United States.

This debunks the coal, gas and nuclear proponents. It means the question is no longer whether renewables can provide reliable electricity. They can. The real question is whether governments and energy systems can modernise grids, transmission and storage fast enough to keep up with the technology revolution already underway.

And this is where Australia should be leading the world. We have some of the best solar resources on Earth. Outstanding wind resources. Huge potential for pumped hydro. One of the world’s highest rates of rooftop solar adoption. And increasingly, giant battery projects that are proving their value during grid stress events.

But instead, some people are still trapped by energy culture wars. Matt Canavan and Angus Taylor would like us to believe that nuclear power - with enormous upfront costs, decade-long construction timelines, unresolved waste issues and massive water requirements - is somehow the future. And Pauline Hanson wants Gina Rhinehart to be able to keep digging up coal.

None of this means the energy transition is simple. New energy systems require investment in transmission, storage and system integration. Europe is already discovering that success brings new challenges, including negative daytime electricity prices during solar surges and the need for much more storage capacity. But these are engineering and infrastructure problems - not existential flaws. And crucially, they're solvable.

So when someone brings up the the old “base-load” talking points, remind them that they’re not serious energy policy. They’re political slogans designed to delay the clean energy transition.

The technology has moved on. The economics has moved on. And increasingly, the rest of the world is too.

Photo from ABC news.