Jun 20, 2025
Electric Avenue: June 20

Australia's battery sales take off as Government incentive drives demand; Australia's first urban renewable energy zone is announced; the Whole Story and Hutt City Council launch some electric resources for kids; Germany finds more uses for solar panels on its highways; and predictions versus reality when it comes to solar and coal.

Batteries go boom (in a good way)

We know the power of a subsidy (and the fear of missing out) to drive demand. Australia has proven that with its solar incentives and the country is now offering the world’s biggest battery discount. While batteries can’t be installed until July 1st, Aussies have been able to put their orders in and, perhaps not surprisingly, there’s been a big increase in interest, with battery systems outpacing solar systems for the first time ever in May. 


As the story in Renew Economy said: "Batteries are not only selling in record numbers, but their average size is increasing, and retrofit systems are surging ahead of new PV + battery installations. With the subsidy covering roughly one-third of a typical ESS (energy storage system), consumers are faced with a choice: Pocket the savings, or use the subsidy to buy a larger battery. It appears many are choosing the latter - a rational choice when the subsidy can effectively provide a 50% capacity uplift at no additional cost."

Public investment has helped to create a huge private solar industry in Australia and led to rapid uptake. Batteries are the logical next step to make the most of what’s sometimes called 'the solar miracle'. 

Minister Simon Watts said at the Electrify Queenstown conference that he was keen to see New Zealand compete with Australia on solar and batteries and we have seen some positive announcements on that front recently, but if he’s serious, there will need to be a lot more action - and a lot more investment.

Home and hosed

Staying in Australia, its Renewable Energy Zones “will group new wind and solar power generation into locations where it can be efficiently stored and transmitted across NSW. Five zones have been identified and will keep electricity reliable as coal-fired power stations retire, by delivering large amounts of energy.” This will primarily be large-scale generation, but, as we often say at Rewiring, a lot of a little is a lot and the Government is planning the first urban renewable energy zone. 

Minister for Climate Change and Energy, Penny Sharpe says: “The Illawarra has the potential to be NSW’s first urban renewable energy zone. This is a chance to leverage the community’s enthusiasm for solar, batteries and EVs to benefit the entire region, as well as pursue longer-term opportunities to support green manufacturing.” 

Drawing inspiration

Becks Smith is an electrification legend who runs a podcast called The Whole Story and is also helping farmers install solar to reduce costs through her company Solayer. She’s decided the kids need to know about the benefits, too, so, with the support of Rabobank, her latest comic is all about the benefits of farm solar.


In Lower Hutt, there’s also a focus on the kids. As Jörn Scherzer - Head of Climate, Waste and Resource at Hutt City Council says: “Are you over that square screen thing? Kids not talking to you? Have a go at playing Lower Hutt’s newest board game, for all kids: small, grown-up, and retired. In Chur the Hutt Climate Explorers, players travel around the city to visit familiar locations such as Te Ngaengae Pool or Matiu Somes Island. A good memory is an advantage and along the way you’ll learn about some cool ways to decarbonise, like electrifying your heating or adding solar.”

The Rewiring team has also heard about teachers who use the material from our explainers to get kids interested in energy and we have presented to a range of different age groups, so feel free to get in touch if you want some resources or want us to come along and talk.  

Vertical integration

In solar where it normally isn’t news, the revolution continues in Germany, where panels are even going up alongside highways. 

Spaces alongside German highways could be utilised better to build solar energy systems, with around 250,000 potential sites identified in a report by the Federal Highway Research Institute (BASt). The report, commissioned by the transport ministry, suggests a potential capacity of up to 48 gigawatts (GW) of solar power panels along highways, plus up to 4.2 GW for installations on sound barriers and up to 1.2 GW for car parks alongside federal roads.

Germany, which isn’t renowned for its huge sunlight hours, has gone hard on solar and over five million systems have been installed. The balcony solar movement, while only providing a small amount of energy to households, currently makes up around 1% of the total solar supply, and more than a quarter of Germans are keen to install a system. Some are even putting them up as fences.

Every little bit helps, but for Casey Handmer, solar is not just about running your fridge, it’s about to change everything. Here’s his vision of a future with almost unlimited cheap solar energy. 

Faster than you think

Humans aren’t particularly good at predictions, as Freakonomics has explored. And that is certainly true when it comes to the uptake of solar and the demise of coal. As Rethinkx shows, understanding how technology adoption works is crucial when it comes to making predictions and there’s been a big difference between predicted and actual rates. The price of solar continues to fall, and that's important for policymakers to keep in mind when they're creating their scenarios.

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