Posts Tagged → industry

Flat fees for flexible EVs

This study builds upon the recently published Unplugged is inflexible report to explore one avenue by which EV drivers could be incentivised to: 

  1. plug their EVs in for extended durations, and  
  1. permit their vehicles to be charged flexibly.  

While there are many avenues by which this could be done, we here explore the potential for EV drivers to be offered very simple, flat retail offers based solely on how often they plug in their EVs and how much energy their EV consumes. This approach entirely removes considerations of when in the day vehicles are plugged in, which lightens the mental burden on drivers and may contribute to greater acceptance of managed charging. 

This concept is motivated by the belief that creating price-certainty, and ideally cost-certainty, is a core way in which electricity retailers create value for their customers. This EV charging arrangement engages customers (EV drivers) is a quid pro quo where retailers contribute their expertise and diversity of customers to manage pricing risk, and EV drivers contribute the flexibility of their charging demand. 

Our modelling shows that doubling the amount of time EVs are plugged in for reduces the cost of charging by half. To be clear, this requires nothing of EV drivers other than having their EV connected to a charger for longer periods, which enables more flexibly charging behaviour. 

To quantify the risk for retailers we conduct a statistical analysis in terms of the cost of EV charging per day or per kWh. This suggests that offering a fixed price per day may go beyond retailers’ risk appetite, making a fixed price per kWh the more attractive option. This is likely also fairer for customers as it charges for the precise amount of energy used. 

The addition of vehicle-to-grid increases the benefits of longer plug-in times by facilitating market arbitrage. Vehicles that are driven less than 40km per day and are plugged in to chargers for more than 8 hours a day (with vehicle-to-grid) can, on average, be charged at zero or negative cost. 

While outside of the scope of this study, we note that this same tariff concept (and simulation model) could be applied matching flexible EV charging with the generation of a collection of wind or solar farms. This would provide another way for a retailer to manage/fix their price exposure while simultaneously creating value for customers by charging vehicles with zero emissions power. 

Full report below

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Watt equity? Australians deserve a Basic Energy Right

This essay was first published in Australian Quarterly 95.3, Australia’s Longest running public affairs magazine, published by Australian Institute for Policy and Science https://aips.net.au/aq-magazine/current-edition/

AQ-95.3-JUL-SEP-2024-Watt-EquityDownload

Within the energy industry there is a popular, feel-good refrain that the energy transition will deliver a system that is ‘democratised’, in addition to being ‘decarbonised’, ‘digitised’, and ‘decentralised’. Here democratised is used as an umbrella term for a broad suite of desirable values: fair, just, equitable. Yet the way in which democratisation is envisioned to occur is, in contrast, blinkered – households are seen to gain political power as a consequence of their generating and controlling electrical power from rooftop solar, batteries, and electric vehicles – but what about those without?

This prevailing narrative of democratisation overlooks, amongst other things, the connection between privilege and ownership of these technologies, and the structural realities of social, as well as techno-economic, power. In particular, it ignores the systemic effects of managing energy through markets and, consequently, ignoring energy’s role as an essential service underpinning modern life.

The starting point of this essay is that the energy transition is not on track to improve equity. This is because equity will only be improved if it is prioritised above competing values, such as profit, in the millions of design choices that constitute the transition.

Such prioritisation is impossible within the existing (artificially) constrained policy landscape, in which the only options are those within the framework of indistinguishable individuals interacting through a market. This eliminates any space for unequal redistribution in recognition of the differing circumstances within the collective, and thereby contributions towards equity.

Progress towards equity rests on expanding the policy imagination. This essay offers one such suggestion: the establishment of a Basic Energy Right that provides all households with a modest amount of energy free of charge to meet their essential needs.

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Ignore variability, overestimate hydrogen production – Quantifying the effects of electrolyzer efficiency curves on hydrogen production from renewable energy sources

In this new paper with Dan Virah-Sawmy and Fiona J Beck we show that neglecting the variable electrolyzer efficiency, as is commonly done in studies of green hydrogen, leads to significant overestimation of hydrogen production in the range of 5–24%

https://www.sciencedirect.com/science/article/pii/S0360319924020676

Abstract

This study investigates the impact of including (or neglecting) the variable efficiency of hydrogen electrolyzers as a function of operating power in the modelling of green hydrogen produced from variable renewable energy sources. Results show that neglecting the variable electrolyzer efficiency, as is commonly done in studies of green hydrogen, leads to significant overestimation of hydrogen production in the range of 5–24%. The effects of the time resolution used in models are also investigated, as well as the impact of including the option for the electrolyzer to switch to stand-by mode instead of powering down and electrolyzer ramp rate constraints. Results indicate that these have a minor effect on overall hydrogen production, with the use of hour resolution data leading to overestimation in the range of 0.2–2%, relative to using 5-min data. This study used data from three solar farms and three wind in Australia, from which it is observed that wind farms produced 55% more hydrogen than the solar farms. The results in this study highlight the critical importance of including the variable efficiency of electrolyzers in the modelling of green hydrogen production. As this industry scales, continuing to neglect this effect would lead to the overestimation of hydrogen production by tens of megatonnes.

Australian vehicle-to-grid expert says research shows even greater benefits are possible

Dr Björn Sturmberg, who is the research leader of ANU’s Battery Storage and Grid Integration Program says vehicle-to-grid offers multifaceted solutions to Australia’s energy woes including reduced prices and increased grid resilience. Sturmberg thinks EV owners can get an even better deal than free charging when it comes to V2G.

“The opportunities for V2G to generate revenue in Australia are significant, due in no small part to the volatility of an electricity market with concentrated market power and aging fossil fuel generators as illustrated earlier this week in Victoria.” said Sturmberg.

On Wednesday after storms in Victoria cut transmission lines leaving 500,000 households without power, wholesale electricity prices spiked as high as $16,600/MWh.

Sturmberg thinks that V2G has the potential to provide a lot more financial benefit than free charging to EV owners.

“Our research shows that the potential income from V2G will in many cases far exceed the cost of EV charging, meaning drivers ought to receive more than just free charging.”

He also believes EV owners should be incentivised to keep their vehicles connected as much as possible.

“For the grid – and thereby for the reliability and affordability of all Australian’s electricity supply – the most important aspect of EV usage is that EVs are plugged in to chargers (or a regular power outlet) as often as possible,” he says.

“This provides the greatest flexibility in their charging, to reduce the cost of electricity generation as well as, critically, the costs of network maintenance and emissions. This requires a shift in drivers’ behaviours, to habitually plug in their EVs whenever parked.”

Sturmberg says he wants to see innovation and trials of tariffs that provide incentives for every minute that EVs are plugged in and available for managed (‘smart’) charging and says this has the potential to be very effective even before including V2G.

On the impacts of V2G to EV battery life Stumberg thinks provided systems are well managed, there’s no need for concerns around battery degradation.

“The impact of V2G (and driving) on batteries is primarily determined by the state of charge of the battery and the rate at which power is injected or drawn out of the battery,” says Sturmberg.

“Well managed V2G, that keeps the state of charge of vehicles within batteries’ comfort zone (generally 30-80%), will have a very modest impact – and in some studies has been shown to improve battery health compared to unmanaged charging by reducing the amount of time that batteries are at a very high state of charge.”

Full story https://thedriven.io/2024/02/16/costs-down-resilience-up-first-vehicle-to-grid-tariff-to-save-drivers-1640-per-year/

Participation and sensemaking in electric vehicle field trials: A study of fleet vehicle-to-grid in Australia

We have just published a new article from the REVS V2G trial about how participants in a field trial – in this case, the fleet, sustainability and asset managers – make sense of and influence technologies when a group comes along wanting to deploy and test them.

We found unexpected effects which revealed insights about what configuration of V2G might be acceptable to fleet end users. If energy market participants want V2G to solve their problems (and make them profit), they need to do the flexibility work.

Abstract

Vehicle-to-grid is a niche technology that has the potential to benefit electricity markets and support more renewable energy in the grid. However, interest from prospective users in adopting V2G is not well understood, particularly in the context of fleet vehicles. Technology-oriented field trials can contribute to the development of niche technologies. Trials usually focus on making engineered systems work, institutional embedding and testing business models. However, through the participation of users they also provide the opportunity to explore processes of problem definition and the formation of social, ethical and cultural meanings. This article presents findings from the Realising Electric Vehicle-to-grid Services project, an Australian trial of vehicle-to-grid in a government-owned light passenger car fleet, aiming to explore co-productive processes as essential aspects of participatory technology development. Our data comprises interviews with organisational actors responsible for facilitating and mediating the trial, as well as others in similar organisational roles. Adopting ecologies of participation as a framework, it reveals the productive effects of these actors in mediating the local embedding of vehicle-to-grid. These findings challenge the framing of vehicle-to-grid as being a question of consumer acceptance and suggest that, for this promising technology to contribute to a more sustainable future, the electricity sector must accept more risk.

Full article: https://lnkd.in/eukchts2

NRMA supporting the ANU Solar Car team and the BWSC (from Darwin to Adelaide)

“We see our (NRMA) partnership with the ANU Solar Racing Team and the Bridgestone World Solar Challenge as a great opportunity to support young people who are the leaders and policymakers of tomorrow. This is just one of many steps we’re taking to help Australian motorists in their transition towards an electric future.” NRMA CEO, Carly Irving-Dolan

ANU Project Lead Isaac Martin said the Solar Racing team had spent the last six years working to develop sustainable innovation within the ACT and were looking forward to working with the NRMA for the BWSC.

“Our team is so lucky to be made up of such diverse individuals from different backgrounds and experiences, and we’re excited to continue to push the boundaries of sustainable technology together,” Mr Martin said.

It’s wonderful to have The NRMA continue to support #electricvehicles and get behind Australia’s solar race (from Darwin to Adelaide) and the ANU Solar Racing team! The team’s making their final preparation for next week’s departure and I can’t wait to join them for the 3022km trip down the Stuart!

Full story in the Canberra Weekly

Community batteries are popular – but we have to make sure they actually help share power

New article in The Conversation today. Excerpt below.

The idea is for these batteries to reduce carbon emissions and energy bills while benefiting all energy users nearby, rather than only those with access to rooftop solar. These are great ambitions – small wonder they’ve proven a hit.

But the success of these batteries is far from certain.

Over the last four years, our research has found two areas we have to fix to maximise the chances these batteries actually do what we want them to do.

First, we need greater clarity on how we decide whether community batteries are a good investment.

Second, we need better measurement and evaluation of what these batteries actually contribute to the grid and to energy users.

In a new discussion paper, this article’s lead author argues the primary purpose of community batteries ought to be addressing constraint in the local electricity grid. This reiterates a consistent finding from our research.

While this sounds reasonable, community batteries aren’t the only option to fix local grid issues. That means we should only turn to them where they are clearly better than the alternatives, such as upgrading transformers.

What about storing solar and shoring up the grid? These tasks may be done more efficiently and with less environmental impact with grid-scale batteries, pumped hydro or electric vehicle batteries.

And what about sharing the benefits of solar with people who can’t afford an array or who have nowhere to put one? While this vision is in line with public sentiment, the complexity of the privatised energy system makes it very difficult to redistribute financial benefits.

Community batteries are also no panacea for the desire of people to see and be included in national planning for the decarbonisation transition. An inclusive planning process can address uncertainties in how the transition will affect us and our communities and ensure it upholds public values.

Time will tell if the newly announced Net Zero Authority will deliver this.

REVS project completion

This week marked the completion of the REVS project – the largest demonstration of vehilce-to-grid technology in Australia and foundational research on the integration of electric vehicles into the grid and people’s lives.

Some of the media stories from the wrap up event below:

“An immense amount of competition:” V2G charging station costs set to plummet

https://www.canberratimes.com.au/story/8140475/powering-the-future-with-your-next-ev-takes-a-step-forward/

Electric vehicles: Batteries on wheels can make grid smaller, says network owner