Swiss electricity getting cleaner, says energy report


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Switzerland Renewable Power Mix shows 62 percent renewables in 2016, led by hydropower, with solar, wind, and biomass growing as nuclear declines under Energy Strategy 2050, while unverified imports include fossil fueled European market electricity.

 

Key Points

2016 Swiss power mix: 62% renewables led by hydropower, with nuclear declining and solar, wind, and biomass rising.

✅ Hydropower supplies 56% of electricity consumption.

✅ Other renewables total 5.9%: solar, wind, biomass.

✅ Nuclear share fell to 17% as phaseout advances.

 

The electricity consumed in Switzerland is ever greener, according to government statistics: some 62% comes from renewable sources, compared with about 25.5% in the U.S. at the time, while nuclear has fallen to 17%.

The figures (in French/German)external link were released on Monday by the Federal Office of Energy, which gathers each year the sources used by electricity providers in Switzerland. The latest report refers to 2016.

As expected, hydropower is the biggest source of juice, at 56%. This marks an increase of 2.5 percentage points on the previous year. Other renewables – solar, wind, biomass and small-scale hydropower – made up 5.9%, a one-point increase on 2015, mirroring gains seen in U.S. solar generation over recent years.

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Taken together, this means that just over three-fifths of electricity provided in the country in 2016 came from renewable sources, a figure helped by the slight decline in the use of nuclear, which fell from 20.7% to 17%, a shift similar to when U.S. renewables became the second-most prevalent source in 2020, reflecting broader trends.

Another 20% comes from unverified sources, which the energy office explains as energy used by high-consuming businesses which is often bought on the European market and not traced within Switzerland. Much of it may be fossil fuel burning.

Overall the figures tie in closely with the government’s Energy Strategy 2050external link, a sweeping plan endorsed by voters last year that aims to completely phase out nuclear by the mid-point of the century, as well as promote renewable sources and reduce consumption, in line with progress such as Germany's 50% clean electricity reported recently.

The electricity consumption figures should not be confused with those for overall energy produced, which (for reasons of import and export) are different: overall, 59% of the production total is hydropower, 33% remains nuclear, 5% other renewable, and 3% fossil fuels, and abroad U.S. renewables hit a 28% monthly record in April, highlighting differing baselines.


 

 

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California regulators weigh whether the state needs more power plants

California Natural Gas Plant Rethink signals a shift toward clean energy, renewables, distributed solar, battery storage, and grid modernization as LADWP and regulators pause repowering plans amid an electricity oversupply and rising ratepayer costs.

 

Key Points

California pauses new gas plants to assess renewables, storage, and grid solutions for reliability.

✅ LADWP delays $2.2B gas repowers to study clean alternatives

✅ CEC weighs halting Oxnard plant amid grid oversupply

✅ Distributed solar, batteries, demand response boost reliability

 

California energy officials are, for the first time, rethinking plans to build expensive natural gas power plants in the face of an electricity glut and growing use of cleaner and cheaper energy alternatives.

The Los Angeles Department of Water and Power announced Tuesday that it has put a hold on a $2.2-billion plan to rebuild several old natural gas power plants while it studies clean energy alternatives to meet electricity demands. And the California Energy Commission may decide as early as Thursday to halt a natural gas project in Ventura County.

The scrutiny comes after an investigation found that the state is operating with an oversupply of electricity, driven largely by the construction of gas-fueled generating plants, leading to higher rates as regulators consider a rate overhaul to clean the grid. The state’s power plants are on track to be able to produce at least 21% more electricity than needed by 2020, according to the Times report.

Californians are footing a $40-billion annual bill while using less electricity, paying $6.8 billion more than they did in 2008 when power use in the state was at its all-time high. Electricity consumption has since fallen and remained largely flat.

Utilities in California have been on a years-long building binge, adding new natural gas plants even as the nation’s electricity system has undergone significant change, including consumer choice reforms that are reshaping the market.

Where utilities once delivered all electrical services from huge power plants along miles of transmission lines, the industry now must consider power delivered to the electric grid not only from its own sources, but also from solar systems and batteries at homes and businesses.

At the same time, utilities have been aggressively upgrading or rebuilding their aging natural gas plants — a move critics have said is unnecessary because consumers are using less power and clean energy technology is making those plants obsolete.

The DWP and energy commission moves involve as many as seven natural gas plant projects proposed for Southern California, despite warnings about a looming shortage if capacity is retired too fast, from Oxnard to Carlsbad, at a cost of more than $6 billion.

Reiko Kerr, the DWP’s senior assistant general manager of power systems, said given the changes in the energy world, the assessment is necessary to protect ratepayer dollars and the environment.

“The whole utility paradigm has shifted,” Kerr said in an interview. “We really are doing our ratepayers a disservice by not considering all viable options.

“We’re just looking at everything,” she said. “What can help us solve this reliability, renewable and greenhouse gas challenge that we all have?”

State and local governments have felt a heightened sense of urgency to deal with climate change after President Trump decided last week to withdraw the United States from the Paris climate accord.

California already has mandated that at least 50% of the state’s electricity come from clean energy sources by 2030. Senate leader Kevin de León (D-Los Angeles) wants to increase that to 100% by 2045.

Building or overhauling natural gas plants throughout Southern California, environmentalists argue, isn’t helping achieve those goals, even as some contend the state can't keep the lights on without gas during the transition.

The DWP’s move to delay plans for the fossil fuel plants, which seemed all but set to be built, came as a surprise to clean-energy advocates, who hailed the decision.

“This is a great first step toward smart energy investments that save customers money, ensure the lights stay on and protect our health and environment,” Graciela Geyer of the Sierra Club said.

The environmental group said that if the utility had moved ahead with the $2.2-billion investment in repowering natural gas plants, it “would have blown an irreparable hole in the city and the state’s hopes to achieve 100% generation” from clean energy sources.

Angela Johnson Meszaros, attorney at EarthJustice, said in a statement: "As our city struggles with the worst smog we’ve seen in years, we appreciate that LADWP is taking some much-needed time to reassess its plans to build fossil fuel power plants. We look forward to the day that LADWP announces that we are going to power our city with 100% clean energy.”

The gas-fired generating units slated for demolition and rebuilding are at the Scattergood, Haynes and Harbor electricity plants, which range from 34 to 67 years old.

As a group, the three plants have generated less than 20% of their combined capacity since 2001. The Harbor facility has operated on the low end at just 7%, while Haynes ran on the high end at 22%.

“The old model, the old legacy clunkers, won’t get us into the future we want,” DWP’s Kerr said.

DWP staff members told the utility’s’ commissioners Tuesday that their analysis of possible alternatives would be completed no later than early 2018.

Separately, the California Energy Commission this week is evaluating whether to halt a natural gas project in Ventura County after the state’s electric grid operator offered to conduct a study of clean energy alternatives to the roughly $250-million project on Mandalay Bay in Oxnard.

An energy commission committee has been deliberating since a hearing Monday during which Southern California Edison and the project’s developer, NRG Energy, argued that a study is simply a delay tactic that probably would kill a project needed to ensure reliable electric service and to avoid blackouts during peak demand.

The California Independent System Operator, which runs the state’s electric grid, told the energy commission that it would take three to four weeks to conduct its study on alternatives to the Oxnard natural gas project.

“Here we have an actual offer by the ISO to do such an analysis,” Ellison Folk, a lawyer representing the city of Oxnard, told the energy commission as she pushed for the study. “Its view that this is an analysis worth doing is something worth taking seriously.”

Energy commission members reviewing the study proposal are scheduled to meet again Thursday to consider the offer.

The board of governors for the California Independent System Operator made the unusual offer at its May 1 meeting to conduct a eleventh-hour study of clean-energy alternatives to building a new natural gas plant.

“If we’re going to be moving forward with a gas plant at this time, in this juncture, in the context of everything that’s going on, not evaluating other alternatives that are viable, noncombustion alternatives, is a missed opportunity,” Angelina Galetiva. a commission board member, said during the May 1 meeting.

 

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EPA moves to rewrite limits for coal power plant wastewater

EPA Wastewater Rule Rollback signals a move to rewrite 2015 Clean Water Act guidelines for coal-fired power plants, easing wastewater rules as heavy metals, mercury, lead, arsenic, and selenium threaten rivers, lakes, public health.

 

Key Points

A planned EPA rewrite of 2015 wastewater limits for coal plants, weakening protections against toxic heavy metals.

✅ Targets 2015 Clean Water Act wastewater guidelines

✅ Affects coal-fired steam electric power plants

✅ Raises risks from mercury, lead, arsenic, selenium

 

The Environmental Protection Agency says it plans to scrap an Obama-era measure limiting water pollution from coal-fired power plants, mirroring moves to replace the Clean Power Plan elsewhere in power-sector policy.

A letter from EPA Administrator Scott Pruitt released Monday as part of a legal appeal and amid a broader rewrite of NEPA rules said he will seek to revise the 2015 guidelines mandating increased treatment for wastewater from steam electric power-generating plants.

Acting at the behest of energy groups and electric utilities who opposed the stricter standards, Pruitt first moved in April to delay implementation of the new guidelines. The wastewater flushed from the coal-fired plants into rivers and lakes typically contains traces of such highly toxic heavy metals as lead, arsenic, mercury and selenium.

“After carefully considering your petitions, I have decided that it is appropriate and in the public interest to conduct a rulemaking to potentially revise (the regulations),” Pruitt wrote in the letter addressed to the pro-industry Utility Water Act Group and the U.S. Small Business Administration.

Pruitt’s letter, dated Friday, was filed Monday with the Fifth Circuit U. S. Court of Appeals in New Orleans, which is hearing legal challenges of the wastewater rule. With Pruitt now moving to rewrite the standards, EPA has asked to court to freeze the legal fight.

While that process moves ahead, EPA’s existing guidelines from 1982 remian in effect. Those standards were set when far less was known about the detrimental impacts of even tiny levels of heavy metals on human health and aquatic life.

“Power plants are by far the largest offenders when it comes to dumping deadly toxics into our lakes and rivers,” said Thomas Cmar, a lawyer for the legal advocacy group Earthjustice. “It’s hard to believe that our government officials right now are so beholden to big business that they are willing to let power plants continue to dump lead, mercury, chromium and other dangerous chemicals into our water supply.”

EPA estimates that the 2015 rule, if implemented, would reduce power plant pollution, consistent with new pollution limits proposed for coal and gas plants, by about 1.4 billion pounds a year. Only about 12 per cent of the nation’s steam electric power plants would have to make new investments to meet the higher standards, according to the agency.

Utilities would need to spend about $480 million on new wastewater treatment systems, resulting in about $500 million in estimated public benefits, such as fewer incidents of cancer and childhood developmental defects.

 

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Clean energy's dirty secret

Renewable Energy Market Reform aligns solar and wind with modern grid pricing, tackling intermittency via batteries and demand response, stabilizing wholesale power prices, and enabling capacity markets to finance flexible supply for deep decarbonization.

 

Key Points

A market overhaul that integrates variable renewables, funds flexibility, and stabilizes grids as solar and wind grow.

✅ Dynamic pricing rewards flexibility and demand response

✅ Capacity markets finance reliability during intermittency

✅ Smart grids, storage, HV lines balance variable supply

 

ALMOST 150 years after photovoltaic cells and wind turbines were invented, they still generate only 7% of the world’s electricity. Yet something remarkable is happening. From being peripheral to the energy system just over a decade ago, they are now growing faster than any other energy source and their falling costs are making them competitive with fossil fuels. BP, an oil firm, expects renewables to account for half of the growth in global energy supply over the next 20 years. It is no longer far-fetched to think that the world is entering an era of clean, unlimited and cheap, abundant electricity for all. About time, too. 

There is a $20trn hitch, though. To get from here to there requires huge amounts of investment over the next few decades, to replace old smog-belching power plants and to upgrade the pylons and wires that bring electricity to consumers. Normally investors like putting their money into electricity because it offers reliable returns. Yet green energy has a dirty secret. The more it is deployed, the more it lowers the price of power from any source. That makes it hard to manage the transition to a carbon-free future, during which many generating technologies, clean and dirty, need to remain profitable if the lights are to stay on. Unless the market is fixed, subsidies to the industry will only grow.

Policymakers are already seeing this inconvenient truth as a reason to put the brakes on renewable energy. In parts of Europe and China, investment in renewables is slowing as subsidies are cut back, even as Europe’s electricity demand continues to rise. However, the solution is not less wind and solar. It is to rethink how the world prices clean energy in order to make better use of it.

 

Shock to the system

At its heart, the problem is that government-supported renewable energy has been imposed on a market designed in a different era. For much of the 20th century, electricity was made and moved by vertically integrated, state-controlled monopolies. From the 1980s onwards, many of these were broken up, privatised and liberalised, so that market forces could determine where best to invest. Today only about 6% of electricity users get their power from monopolies. Yet everywhere the pressure to decarbonise power supply has brought the state creeping back into markets. This is disruptive for three reasons. The first is the subsidy system itself. The other two are inherent to the nature of wind and solar: their intermittency and their very low running costs. All three help explain why power prices are low and public subsidies are addictive.

First, the splurge of public subsidy, of about $800bn since 2008, has distorted the market. It came about for noble reasons—to counter climate change and prime the pump for new, costly technologies, including wind turbines and solar panels. But subsidies hit just as electricity consumption in the rich world was stagnating because of growing energy efficiency and the financial crisis. The result was a glut of power-generating capacity that has slashed the revenues utilities earn from wholesale power markets and hence deterred investment.

Second, green power is intermittent. The vagaries of wind and sun—especially in countries without favourable weather—mean that turbines and solar panels generate electricity only part of the time. To keep power flowing, the system relies on conventional power plants, such as coal, gas or nuclear, to kick in when renewables falter. But because they are idle for long periods, they find it harder to attract private investors. So, to keep the lights on, they require public funds.

Everyone is affected by a third factor: renewable energy has negligible or zero marginal running costs—because the wind and the sun are free. In a market that prefers energy produced at the lowest short-term cost, wind and solar take business from providers that are more expensive to run, such as coal plants, depressing wholesale electricity prices, and hence revenues for all.

 

Get smart

The higher the penetration of renewables, the worse these problems get—especially in saturated markets. In Europe, which was first to feel the effects, utilities have suffered a “lost decade” of falling returns, stranded assets and corporate disruption. Last year, Germany’s two biggest electricity providers, E.ON and RWE, both split in two. In renewable-rich parts of America, power providers struggle to find investors for new plants, reflecting U.S. grid challenges that slow a full transition. Places with an abundance of wind, such as China, are curtailing wind farms to keep coal plants in business.

The corollary is that the electricity system is being re-regulated as investment goes chiefly to areas that benefit from public support. Paradoxically, that means the more states support renewables, the more they pay for conventional power plants, too, using “capacity payments” to alleviate intermittency. In effect, politicians rather than markets are once again deciding how to avoid blackouts. They often make mistakes: Germany’s support for cheap, dirty lignite caused emissions to rise, notwithstanding huge subsidies for renewables. Without a new approach the renewables revolution will stall.

The good news is that new technology can help fix the problem.  Digitalisation, smart meters and batteries are enabling companies and households to smooth out their demand—by doing some energy-intensive work at night, for example. This helps to cope with intermittent supply. Small, modular power plants, which are easy to flex up or down, are becoming more popular, as are high-voltage grids that can move excess power around the network more efficiently, aligning with common goals for electricity networks worldwide.

The bigger task is to redesign power markets to reflect the new need for flexible supply and demand. They should adjust prices more frequently, to reflect the fluctuations of the weather. At times of extreme scarcity, a high fixed price could kick in to prevent blackouts. Markets should reward those willing to use less electricity to balance the grid, just as they reward those who generate more of it. Bills could be structured to be higher or lower depending how strongly a customer wanted guaranteed power all the time—a bit like an insurance policy. In short, policymakers should be clear they have a problem and that the cause is not renewable energy, but the out-of-date system of electricity pricing. Then they should fix it.

 

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How Hedge Funds May Be Undermining the Electric Car Boom

Cobalt Supply Chain for EV Batteries faces shortages as lithium-ion demand surges; Tesla gigafactories, ethical sourcing, Idaho cobalt mining, and DRC risks intensify pricing, logistics, and procurement challenges for manufacturers and investors.

 

Key Points

A network supplying cobalt for lithium-ion cathodes, strained by EV demand, ethical sourcing pressures, and DRC risk.

✅ EV growth outpaces cobalt supply, widening deficits

✅ DRC reliance drives ESG scrutiny and sourcing shifts

✅ Idaho projects and stockpiling reshape U.S. supply

 

A perfect storm is brewing in the 21st Century battery market.

More specifically, it's about what goes into those batteries - and it's not just lithium.

The other element that makes up 35 percent of the lithium-ion batteries mass produced at Tesla's Nevada gigafactory and at a dozen of other behemoths slated to come on line, is cobalt. And it's already in dramatically short supply. A part of the answer to the cobalt deficit is 100 percent American, and this little-known miner is sitting on a prime Idaho cobalt project that is one of only two that looks likely to come online in the U.S. and it's right in Tesla's backyard.

 

High-Energy Batteries Need More Cobalt Than Lithium 

If you've been focusing your investment on lithium supplies lately you've been missing the even bigger story. EV batteries need about 200 grams of refined cobalt per kilowatt of battery capacity. Power walls need more than twice that. Between March 2016 and April 2017, the cost of the cobalt in that mix nearly tripled. But it isn't just the price that's got manufacturers worried. It's the shortage of availability. Keeping gigafactories stocked with enough cobalt to run at capacity is the challenge of the decade.

Tesla, now with a $50-billion market cap, launched a $5-billion battery gigafactory in Nevada in January. By the end of 2017, it will have doubled the entire global battery production capacity. By next year, it will be producing more batteries than the rest of the world combined.

It is estimated that Tesla's gigafactory alone will need anywhere between 7,000 and 17,500 tonnes of refined cobalt every year.

Tesla used to buy its finished battery cells from Panasonic, which in turn got its processed cathode powders from a Japanese company, Sumitomo was processing its own cobalt in the Philippines. However, that facility is already running at capacity and couldn't even begin to handle Tesla's gigafactory demand. In other words, Tesla's supply chain is no longer secure. And that's just Tesla.

The EV market is fifteen times larger than it was five years ago. The market has experienced a comppound annual growth rate of over 72 percent from 2011-2016, with new sources like Alberta's lithium-laced oil fields drawing investment alongside cobalt. This year, analysts expect it to gain another 25-26 percent. Last year, global EV production grew 41 percent, and sales are up more than 60 per cent year to year.

In addition,the Iron Creek project isn't a new exploration property. It has already seen major historic exploratory work, including 30,000 feet of diamond drilling. Iron Creek has historic (non 43-101 compliant) indications of 1.3 million tons grading 0.59 percent of cobalt with encouraging indications of up to 10 million tons. The 'closeology' is also brilliant. It's right next to the only advanced cobalt project in the U.S., which has a resource of 3 million-plus tonnes of cobalt.

As the battery market hits fever pitch and the supply-chain bottlenecks become unbearable, homegrown exploration is the key-first-movers and first investors will be the biggest beneficiaries.

 

A Very Precarious Supply Chain 

Supply is already in deficit, and we're also looking at an anticipated 500 percent increase in demand, making EV battery recycling an increasingly important complement to mining. Analysts at Macquarie Research project deficits of 885 tonnes of this resource next year, 3,205 in 2019 and 5,340 in 2020.

Not only is demand set to wildly outstrip supply very soon, but current supply (50 percent) comes primarily from the Democratic Republic of Congo (DRC). Buyers are coming under increasing pressure to look elsewhere for cobalt as the U.S. moves to work with allies to secure EV metals through diversified supply chains. The DRC has a horrendous record when it comes to labor practices and human rights.

Ask Apple Inc.  The tech giant recently announced it would stop buying unethical DRC cobalt for its iPhones - and as such, it has been forced to look for new suppliers.

The perfect storm continues: Some 95 percent of the world's cobalt is produced as a byproduct of copper and nickel mining, where concerns about ethical sourcing have put a spotlight on Canada's role in sustainable nickel practices worldwide. This means that cobalt supply is dependent on copper and nickel mining, and if those commodities are uneconomic to mine, there are no cobalt by-product results.

Not only is US Cobalt one of the first movers on the All-American ethical cobalt scene, but it's also financed to advance its Idaho Cobalt Belt project, and hopes to prove up 10 million tonnes of cobalt resource.

 

The Dream Team Behind Pure American Cobalt 

The CEO of US Cobalt, Wayne Tisdale, is a legend in spotting emerging trends with impeccable timing and has created billions in shareholder value. He's already done it with uranium, gold and oil and gas, and his most recent homerun was in lithium, with Pure Energy. When it launched in 2012, lithium was selling for about $5,000 per tonne. Within 18 months, it had increased 450 percent.

His next bet is on cobalt.

Tisdale and his team at Intrepid Financial have, in recent years, created $2.7 billion in value by building and financing 5 companies in completely different industries:

  • Rainy River (gold) was worth $1.2 billion at its peak
  • Xemplar (uranium) hit $1 billion at its peak
  • Ryland Oil (oil and gas) sold for $114 million
  • Webtech Wireless (tech) was worth $300 million at its peak
  • Pure Energy (lithium) is worth $65 million (and counting)

The bottom line? There is no other commodity on the market right now that we need more.

Just watch what the hedge funds are doing with cobalt because it's unprecedented. The run on physical cobalt started in February in the least expected corner: Major hedge funds started buying up physical cobalt and hoarding it in order to gain exposure, resulting in a major supply shortage for the blue metal. Swiss-based Pala Investments and China's Shanghai Chaos have already hoarded 17 percent of last year's global production. At today's prices that's worth around $280 million. At tomorrow's prices, it will be worth a lot more.

When hedge funds start stockpiling physical cobalt, it sends its traditional buyers into a panic to secure new shipments. Since November, cobalt prices have rallied more than 100 percent, and this is only the beginning. As the cobalt supply problem grows, and EV giants and gigafactories continue to increase demand, a home-grown solution is at hand. As a first principle of investing, where there is a supply problem, there is a massive opportunity for early investors.

 

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Montreal's first STM electric buses roll out

STM Electric Buses Montreal launch a zero-emission pilot with rapid charging stations on the 36 Monk line from Angrignon to Square Victoria, winter-tested for reliability and aligned with STM's 2025 fully electric fleet plan.

 

Key Points

STM's pilot deploys zero-emission buses with charging on the 36 Monk line, aiming for a fully electric fleet by 2025.

✅ 36 Monk route: Angrignon to Square Victoria with rapid charging

✅ Winter-tested performance; 15-25 km range per charge

✅ Quebec-built: motors Boucherville; buses Saint-Eustache

 

The first of three STM electric buses are rolling in Montreal, similar to initiatives with Vancouver electric buses elsewhere in Canada today.

The test batch is part of the city's plan to have a fully electric fleet by 2025, mirroring efforts such as St. Albert's electric buses in Alberta as well.

Over the next few weeks, one bus at a time will be put into circulation along the 36 Monk line, a rollout approach similar to Edmonton's first electric bus efforts in that city, going from Angrignon Metro station to Square Victoria Metro station. 

Rapid charging stations have been set up at both locations, a model seen in TTC's battery-electric rollout to support operations, so that batteries can be charged during the day between routes. The buses are also going to be fully charged at regular charging stations overnight.

Each bus can run from 15 to 25 kilometres on a single charge. The Monk line was chosen in part for its length, around 11 kilometres.

The STM has been testing the electric buses to make sure they can stand up to Montreal's harsh winters, drawing on lessons from peers such as the TTC electric bus fleet in Toronto, and now they are ready to take on passengers.

 

Keeping it local

The motors were designed in Boucherville, and the buses themselves were built in Saint-Eustache.

No timeline has been set for when the STM will be ready to roll out the whole fleet, but Montreal Mayor Denis Coderre, who was on hand at Tuesday's unveiling, told reporters he has confidence in the $11.9-million program.

"We start with three. Trust me, there will be more." said Coderre.

 

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Clean energy stored in electric vehicles to power buildings

Vehicle-to-Grid (V2G) enables bidirectional charging, letting EV batteries supply smart grid services to large buildings, support renewable energy integration, reduce battery degradation, and optimize demand response for efficient, resilient power management.

 

Key Points

Vehicle-to-Grid (V2G) is bidirectional EV charging that feeds the grid and buildings while protecting battery health.

✅ Uses idle EVs to power buildings and support renewables

✅ Smart algorithms minimize lithium-ion battery degradation

✅ Provides grid services, demand response, and peak shaving

 

Stored energy from electric vehicles (EVs) can be used to power large buildings -- creating new possibilities for the future of smart, renewable energy -- thanks to ground-breaking battery research from WMG at the University of Warwick.

Dr Kotub Uddin, with colleagues from WMG's Energy and Electrical Systems group and Jaguar Land Rover, has demonstrated that vehicle-to-grid (V2G) technology can be intelligently utilised to take enough energy from idle EV batteries to be pumped into the grid and power buildings -- without damaging the batteries.

This new research into the potentials of V2G shows that it could actually improve vehicle battery life by around ten percent over a year.

For two years, Dr Uddin's team analysed some of the world's most advanced lithium ion batteries used in commercially available EVs -- and created one of the most accurate battery degradation models existing in the public domain -- to predict battery capacity and power fade over time, under various ageing acceleration factors -- including temperature, state of charge, current and depth of discharge.

Using this validated degradation model, Dr Uddin developed a 'smart grid' algorithm, which supports grid coordination and intelligently calculates how much energy a vehicle requires to carry out daily journeys, and -- crucially -- how much energy can be taken from its battery without negatively affecting it, or even improving its longevity.

The researchers used their 'smart grid' algorithm to see if they could power WMG's International Digital Laboratory -- a large, busy building which contains a 100-seater auditorium, two electrical laboratories, teaching laboratories, meeting rooms, and houses approximately 360 staff -- with vehicle-to-building charging from EVs parked on the University of Warwick campus.

They worked out that the number of EVs parked on the campus (around 2.1% of cars, in line with the UK market share of EVs) could spare the energy to power this building, acting as capacity on wheels for electricity networks -- and that in doing so, capacity fade in participant EV batteries would be reduced by up to 9.1%, and power fade by up to 12.1% over a year.

It has previously been thought that extracting energy from EVs with V2G technology causes their lithium ion batteries to degrade more rapidly.

Dr Uddin's group (along with collaborators from Jaguar Land Rover) have proved, however, that battery degradation is more complex -- and this complexity, in operation, can be exploited to improve a battery's lifetime.

Given that battery degradation is dependent on calendar age, capacity throughput, temperature, state of charge, current and depth of discharge, V2G is an effective tool that can be used to optimise a battery's conditions such that degradation is minimised. Hence, taking excess energy from an idle EV to power the grid actually keeps the battery healthier for longer.

Dr Uddin commented on the research:

"These findings reinforce the attractiveness of vehicle-to-grid technologies to automotive Original Equipment Manufacturers: not only is vehicle-to-grid an effective solution for grid support -- and subsequently a tidy revenue stream -- but we have shown that there is a real possibility of extending the lifetime of traction batteries in tandem.

"The results are also appealing to policy makers interested in grid decarbonisation and addressing grid challenges from rising EVs across power systems."

The research, 'On the possibility of extending the lifetime of lithium-ion batteries through optimal V2G facilitated by an integrated vehicle and smart-grid system' is published in Energy.

It was funded by the Engineering and Physical Sciences Research Council and the WMG centre High Value Manufacturing Catapult, in partnership with Jaguar Land Rover.

 

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