Oct 4, 2024
Rewiring Aotearoa
Electric Avenue: Oct 4

Gather round the heat pump, children, as we explore the big benefits of battery recycling, how customers giving up control can help the grid, a radical new plan for electric transport in Queenstown, big trucks, big chargers and big electric ferries, and a look at just what has been captured when it comes to carbon capture.

What’s old is new again

As we pointed out in our recent Watt Now, fossil fuels are staggeringly wasteful and many of the renewables we’re building are recyclable. For example, solar panels have an expected lifespan of about 25 - 30 years, but some are warrantied for 40 years and as much as 90% of the material in a panel can now be recycled (Phoenix Metals now recycles them in New Zealand and there are a range of schemes in Australia). 

One of the co-founders of Tesla, JB Straubel, has set up Redwood Materials with the goal of creating a circular supply chain for the energy transition. Unlike hydrocarbon energy, which we burn and send into the sky, the materials found in batteries are a strategic asset. We just need the right industrial processes to refine them.

“It’s obvious when you think about it, but the ramifications are totally different … We’re not consuming them. We're building a strategic stockpile of them because every bit of nickel that we buy in to the country doesn’t go away. It’s still sitting in a battery somewhere.”

Over in Poland, a newly constructed battery recycling facility has become one of Europe’s largest. It can process 12,000 metric tons of used lithium-ion batteries each year – or approximately 28,000 EV battery packs annually. 

“As demand for electric vehicles continues to grow, lithium-ion battery recycling is becoming an increasingly important part of the EV battery materials supply chain. In the European Union (EU), new batteries will be required to contain a minimum amount of recycled content by 2030. Lithium-ion battery recycling also keeps hazardous battery materials out of landfills while minimising the environmental impacts associated with nickel, cobalt and lithium mining.”

In control 

New Zealand has a history of centralised control to manage electricity demand with ripple control able to switch off water heating when required. Things have come a long way since then and for the optimisers, there are more advanced ways to reduce energy use or costs through apps, smart chargers or bluetooth timers. 

But most of us aren’t optimisers. We’re set and forgetters and that means there’s still room for companies to get involved and make things more efficient. For a good example of that in action, The Washington Post has created an interactive story to show how customers that hand over control of the thermostat helped Texas avoid blackouts on one of the hottest days of the year. 

“[Ada] Garcia, who was working in her home office, had no idea that Texas was teetering on the edge of an energy crisis that evening or that Octopus Energy, her power company, was waging a battle in her living room to save the grid. But these small adjustments to her thermostat saved about 10 kilowatt-hours of electricity, which is enough to wash about 20 loads of laundry. 
“I never really notice when they change the thermostat,” said Garcia, who signed up for the energy-saving program in exchange for a discount on her monthly power bill.

Octopus has trialled savings sessions in New Zealand and the results have been promising. In the case of one customer, the savings gained from reducing their use at peak time actually paid for dinner that night. 

Feel the whoosh

We’re all about electric transport at Rewiring Aotearoa. If you need a car, make it electric. If you run buses or trucks, make them electric. And if you run aerial pods that are attached to elevated fixed cables and can be called on demand, make them electric. 

Queenstown’s Remarkables Park is to become the first place in the world to trial the new Whoosh transportation system, which was developed by Christchurch company Holmes Solutions, and it hopes to be operational by 2027. 

As Woosh chief executive Dr Chris Allington told RNZ: "The whole system works on demand, so you can hop on your app and call a vehicle, when you walk to the station it will be waiting for you, hop into it, it will take you directly to where you want to go without stopping along the way.” 

Futurists have long been grumpy that we don’t yet have flying cars. This seems pretty close. 

Big truck energy

It’s fascinating to see the change of heart when fossil fuel enthusiasts try out an EV: cops in the US seem to love them, rubbish truck drivers prefer them, and mining businesses can see the benefits too.

Australian company Fortescue recently announced a AU$4 billion investment in fleet electrification that will see it purchase "475 emission-free machines, including 360 autonomous battery-electric trucks, 55 electric excavators, and 60 new battery-electric dozers from Germany's Liebherr Group."


"You will watch the breath sucked out from CEOs' chests when they realize this is a US$2.8 billion order; This is the future of the heavy industry. And it's zero emissions," said Fortescue's chairman, Andrew Forrest.

Charging these big beasts up is an issue (unless you have a cord like the one in Macraes), but Fortescue has come up with a doozy of its own: a 6MW charger that is significantly bigger than any other truck charger built to date.

“The 6 MW chargers will be used to charge the huge 1.9 megawatt hour batteries that drive the power systems for the massive 240 tonne battery electric haul trucks. It says it will be able to do that in just half an hour."

Speaking of big things in Australia, Tasmanian boat builder Incat is in the process of creating the world’s biggest electric ferry. And while the Tesla Cybertruck is an ‘acquired taste’, these two electric vehicles met recently. 

Catch me if you can

The Juice Media has a history of skewering the fossil fuel industry’s claims and Government plans by using pesky real data. And as this video from a few years back about carbon capture and storage shows, the industry has mostly captured Government and f&*ck all carbon. 

New Zealand’s second Emissions Reduction Plan had a worrying focus on this largely unproven technology and it seems mad to be focusing on that when there is a massive opportunity to reduce emissions by focusing on households. 

These ‘dinner table decisions’ like how to heat your water and your rooms, how to cook your food and how to get around make up about 30% of our domestic emissions and they can be removed with technology that is available today and is cheaper over its lifetime than the equivalent fossil fuel machines.

Read more in Mike Casey's recent opinion piece about how focusing on the fuels we use to get around, heat our water and homes, and cook our food is the best bet if we want to reduce our emissions.

Read moreDownload the document here

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