Australia’s first household to add a Tesla Powerwall battery can this week begin buying and selling energy on the electricity market, after the addition of a world-leading software program by Canberra company, Reposit Power.
At the end of last month, the Pfitzner family in Kellyville Ridge, north-west of Sydney, became the first of what will soon be many Australian households to install one of Tesla’s much-hyped 7kWh batteries, to store energy generated by the house’s 5kW solar system.
On Tuesday afternoon, the same household became the first in Australia to integrate Reposit Power’s GridCredit technology with the Powerwall, to act as the “brains” of the solar plus battery storage system.
“What we do is put some smart brains on that (technology) and allow it to interact with wholesale markets,” says Reposit’s Luke Osborne.
“We want customers to be able to choose the best storage device and have a great user experience from us by trading in energy markets, buying low and selling high and supplying themselves in between.”
The “set and forget” technology – which was tested last year in a series of ARENA-backed trials based in Canberra and the surrounding region, – uses data from inputs including advanced weather forecasting and electricity market pricing to decide whether to store solar generated energy in the battery during the day or sell it back to the grid at a profit.
For example, when energy prices drop overnight and the system predicts low solar generation the following day GridCredits takes electricity from the grid to charge the batteries.
As Reposit Power CTO and co-founder Lachlan Blackhall puts it, the technology effectively turns your solar and storage into “a mini power station” that works just for you.
“It also allows you to trade your energy onto the grid, via GridCredits – to sell it back to the retailer or the network or into the wholesale market.”
Blackhall says the company is now in the process of rolling out their software to hundreds of customers, and by the start of Q2, they expect that number to grow.
And while Reposit’s software is compatible with other battery technologies, the company’s early pairing with the much hyped Tesla battery – announced last May – is a feather in the young company’s cap and a great way to get on the radar.
“We are passionate about working with partners that share our vision of empowering consumers to take control of their energy future,” Blackhall told One Step. “Tesla is one such company.
“We are delighted to starting seeing the impact that Tesla batteries powered by Reposit technology will have for consumers, and the electricity grid as a whole, over the years ahead,” he said.
But battery compatibility is not the only prerequisite for households wishing to use the GridCredits technology – it also requires the cooperation of the household’s retailer or network operator.
And of course, not all of Australia’s energy industry incumbents will be thrilled with the prospect of consumers becoming active market players.
Currently, Blackhall says there is a small selection of retailers playing ball, including Diamond Energy – so far the only retailer to publicly announce it is working with Reposit (more will be announced later in the year).
According to the retailer’s website, the Diamond Energy GridCredit100 “is like a feed-in tariff. We will initiate the purchase of your battery dispatched electricity at a whopping 100 cents/kWh* during any ‘Grid Credit Event’ (when the market requires your electricity).”
“I think whenever there’s game chaining technology afoot, there’s always incumbents who feel a little bit threatened by that,” Blackhall said.
“But there is also a growing understanding of the importance of consumers who’ve spent the money on storage – that they deserve to be rewarded for that; and that their investment creates opportunities for networks.
“A lot of retail companies realise that there are opportunities here and are actively trying to take advantage of that,” he added.
Chris Williams, managing director of authorised Tesla reseller Natural Solar, agrees.
Williams told One Step Off The Grid in an interview on Tuesday that as many as 90 per cent of his new solar customers were also looking at batteries.
Of those who chose to go ahead and add battery storage with their solar, 90 per cent, he said, were opting for a Tesla. As many as a quarter of those customers were also inquiring about Reposit’s GridCredits.
The momentum among consumers to invest in this level of energy independence, he said, was driven by a combination of a desire to save money, to be green, and to get rid of the utility bill and “stick it to the man.”
“I think even people that want to save money get a great feeling when they’re helping the environment, and people who want to help the environment also like saving money,” he said.
“At the end of the day,” he added, “(solar and storage with energy management software like Reposit’s) creates market efficiency. And everyone is for market efficiency.
“If (the networks) are going to bury their heads in the sand, then they will miss out.”
Sophie is editor of One Step Off The Grid and deputy editor of its sister site, Renew Economy. Sophie has been writing about clean energy for more than a decade.
This post was published on February 10, 2016 12:05 pm
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Sophie, there would be huge interest in a followup article from the Pfitzner family in about 3 months to see how the Powerwall performed and whether it met their expectations.
All well and good - but having a quarterly winter bill of $3500? What inefficient, full of holes home is that? And a heating system that inefficient? I don't know if that even exists.
What about some (a lot) insulation and draft proofing? Note that they still pay $4000 a year for electricity after the Tesla/Reposit upgrade (a guess because the autumn bill is not available).
How ridiculous! Every energy auditor could show them ways to easily cut their bill three quarters . This is a typical example of technology overkill without the results. I'm not against home storage or the reposit software per se, but I'm against bad advice given to customers to sell.
Spot on. The problem is not the solar energy we don't use, it's the fossil energy we do use....... and ALL that stuff is 100% made with fossil fuels. Green bling to make you feel less guilty about your overconsumption is what this is all about.
It looks like a snow job to me. I went through a winter 20 below with ten blankets on the bed. They are going to find these batteries cause cancer, kill insects, all that stuff and more. This is not technology from this planet.
So much hype........ for starters, those power walls are neither cheap nor sustainable. Lithium is fine for situations where light weight is needed, like cell phones, laptops, and even cars...... but houses? Do you think your house cares how heavy your batteries are?
And why dress up a battery bank to look like bling? Suckers falling for good marketing.
My experience with lithium batteries is that they don't last, and they all end up in landfill.
We are going off the grid soon, with 100 year old technology invented by Thomas Edison. Yes, THAT Thomas Edison...... and some of his batteries are STILL going after 100 years. But of course, no one wants to sell you stuff that doesn't wear out and need replacing soon so they can part you from your money on a regular basis. Oh, and anyone who needs 5kW of PVs is using waaayy too much power. Our last house was completely powered with just 1.3kW.
https://damnthematrix.wordpress.com/2016/02/03/energy-storage-for-the-tasmanian-project/