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Australian Rooftop Solar Grid Constraints are driving debates over voltage rise, export limits, inverter curtailment, DER integration, and network reliability, amid concerns about localized blackouts, infrastructure protection, tariff reform, and battery storage adoption.

Key Points

Limits on solar exports to curb voltage rise, protect equipment, and keep the distribution grid reliable.

✅ Voltage rise triggers transformer protection and local outages.

✅ Export limits and smart inverter curtailment manage midday backfeed.

✅ Tariff reform and DER orchestration defer costly network upgrades.

With almost 1.8 million Australian homes and businesses relying on power from rooftop solar panels, there is a fight brewing over the impact of solar energy on the national electricity grid.

Electricity distributors are warning that as solar uptake continues to increase, there is a risk excess solar power could flow into the network, elevating power outage risks, causing blackouts and damaging infrastructure.

But is it the network businesses that are actually at risk, as customers turn away from centrally produced electricity?

This is what three different parties have to say:

Andrew Dillon of the network industry peak body, Energy Networks Australia (ENA), told 7.30 the way customers are charged for electricity has to change, or expensive grid upgrades to poles and wires will be needed to keep solar customers on the grid.

"The engineering reality is once we get too much solar in a certain space it does start to cause technical issues," he said.

"If there is too much energy coming back up the system in the middle of the day, it can cause frequency voltage disturbances in the system, which can lead to transformers tripping off to protect themselves from being damaged and that will cause localised blackouts.

"There are pockets of the grid already where we have significant penetration and we are starting to see technical issues."

However, he acknowledges that excess solar power has yet to cause any blackouts, or damage electricity infrastructure.

"I don't buy that at all," he said.

"It can be that in some suburbs or parts of suburbs a high penetration of solar on the point of use can raise voltage, these issues generally can be dealt with quickly.

"The critical issue is think where you are getting that perspective from. It is from an industry whose underlying market is threatened by customers doing it for themselves through peer-to-peer energy models. So, think with some critical insight to these claims."

He said when too many people rely on solar it threatens the very business model of the companies that own Australia's poles and wires.

"When the customers use the network less to buy centrally produced electricity, they ship less product," he said.

"When they ship less product, their underlying business is undermined, they need to charge more to the customers left and that leads to what has been called a death spiral.

"We are seeing rapid reductions in consumption at the point of use per household."

But Mr Dillon denies the distributors are acting out of self-interest.

"I absolutely reject that claim," he said.

"[What] we, as networks, have an interest in is running a safe network, running a reliable network, enabling the transition to a low carbon future and doing all that while keeping costs down as much as possible."

Solar installers say the networks are holding back business

Around Australia the poles and wires companies can decide which solar systems can connect to the grid.

Small systems can connect automatically, but in some areas, those wanting a larger system can find themselves caught up in red tape.

The vice-president of the Australian Solar Council, Glen Morris, said these limitations were holding back solar installation businesses and preventing the take-up of new battery storage technology.

"If you've already got a five kilowatt system, your house is full as far as the network is concerned," Mr Morris said.

"You go to add a battery, that's another five kilowatts and so they say no you're already full … so you can't add storage to your solar system."

The powers that be are stumbling in the dark to prevent a looming energy crisis, as the grid seeks to balance renewables' hidden challenges and competing demands.

Mr Morris also said the networks had the capacity to solve the problem of any excess solar flows into the grid, and infrastructure upgrades were not necessary.

"They already have the capability to turn off your solar invertor whenever they feel like it," he said.

"If they choose to connect that functionality, it's there in the inverter. The customer already has it."

ENA has acknowledged there is frustration with rooftop system size limits in the solar industry.

"What we are seeing is solar installers and others slightly frustrated at different requirements for different networks and sometimes they are unclear on the reasons for that," Mr Dillon said.

"Limitations are in place across the country to keep the lights on and make sure the network stays safe and we don't have sudden rushes of people connecting to the grid that causes outage issues."

But Mr Mountain is unconvinced, calling the limitations "somewhat spurious".

"The published, documented, critically reviewed analyses are few and far between, so it is very easy for engineers to make these arguments and those in policy circles only have so much tolerance for the detail," he said.

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Philippines Renewable Energy Mini-Grids address rising electricity demand, rolling blackouts, off-grid electrification, and decentralized power in an archipelago, leveraging solar, wind, and hybrid systems to close the generation capacity gap and expand household access.

Key Points

Decentralized solar, wind, and hybrid systems powering off-grid areas to relieve shortages and expand access.

✅ Targets 2.3M unelectrified homes with reliable clean power

✅ Mitigates rolling blackouts via modular mini-grid deployments

✅ Supports energy access, resilience, and grid decentralization

The reason why IRENA made its study in the Philippines is because of the country’s demand for electricity is on a steady rise while the generating capacity lags behind. To provide households the electricity, the government is constrained to implement rolling blackouts in some regions. By 2030, the demand for electricity is projected to reach 30 million kilowatts as compared to 17 million kilowatts which is its current generating capacity.

One of the country’s biggest conglomerations, San Miguel Corporation is accountable for almost 20% of power output. It has power plants that has a 900,000-kW generation capacity. Another corporation in the energy sector, Aboitiz Power, has augmented its facilities as well to keep up with the demand. As a matter fact, even foreign players such as Tokyo Electric Power and Marubeni, as a result of the gradual privatization of the power industry which started in 2001, have built power plants in the country, a challenge mirrored in other regions where electricity for all demands greater investment, yet the power supply remains short.

And so, the IRENA came up with the study entitled “Accelerating the Deployment of Renewable Energy Mini-Grids for Off-Grid Electrification – A Study on the Philippines” to provide a clearer picture of what the current state of the crisis is and lay out possible solutions. It showed that as of 2016, a record year for renewables worldwide, the Philippines has approximately 2.3 million households without electricity. With only 89.6 percent of household electrification, that leaves about 2.36 million homes either with limited power of four to six hours each day or totally without electricity.

By the end of 2017, the Philippine government will have provided 90% of Philippine households with electricity. It is worth mentioning that in 2014, the National Capital Region together with two other regions had received 90 percent electrification. However, some areas are still unable to access power that’s within or above the national average. IRENA’s study has become a source of valuable information and analysis to the Philippines’ power systems and identified ways on how to surmount the challenges involving power systems decentralization, with renewable energy funding supporting those mini-grids which are either powered in parts or in full by renewable energy resources. This, however, does not discount the fact that providing electricity in every household still is an on-going struggle. Considering that the Philippines is an archipelago, providing enough, dependable, and clean modern energy to the entire country, including the remote and isolated islands is difficult. The onset of renewable energy is a viable and cost-effective option to support the implementation of mini-grids, as shown by Ireland's green electricity targets rising rapidly.

 

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Snow-powered nanogenerator harvests static electricity from falling snow using a silicone triboelectric design, enabling energy harvesting, solar panel support during snowfall, and dual-use sensing for weather monitoring and wearable winter sports analytics.

Key Points

A silicone triboelectric device that harvests snowDcharge to generate power and enable sensing.

✅ Triboelectric silicone layer captures charge from falling snow.

✅ Integrates with solar arrays to maintain power during snowfall.

✅ Functions as weather and motion sensor for winter sports.

Scientists from University of California, Los Angeles and McMaster University have invented a nanogenerator that creates electricity from falling snow.

Most Canadians have already seen a mini-version of this, McMaster Prof. Ravi Selvaganapathy told CTV’s Your Morning. “We find that we often get shocked in the winter when it’s dry when we come in into contact with a conductive surface like a doorknob.”

The thin device works by harnessing static electricity: positively-charged, falling snow collides with the negatively-charged silicone device, which produces a charge that’s captured by an electrode.

“You separate the charges and create electricity out of essentially nothing,” Richard Kaner, who holds UCLA’s Dr. Myung Ki Hong Endowed Chair in Materials Innovation and whose lab has explored turning waste into graphene, said in a press release.

“The device can work in remote areas because it provides its own power and does not need batteries or reliance on home storage systems such as the Tesla Powerwall, which store energy for later use,” he said, explaining that the device was 3D printed, flexible and inexpensive to make because of the low cost of silicone.

“It’s also going to be useful in places like Canada, where we get a lot of snow and are pursuing a net-zero grid by 2050 to cut emissions. We can extract energy from the environment,” Selvaganapathy added.

The team, which also included scientists from the University of Toronto, published their findings in Nano Energy journal last year, but a few weeks ago, they revealed the device’s more practical uses.

About 30 per cent of the Earth’s surface is covered by snow each winter, which can significantly limit the energy generated by solar panels, including rooftop solar grids in cold climates.

So the team thought: why not simply harness electricity from the snow whenever the solar panels were covered?

Integrating their device into solar panel arrays could produce a continuous power supply whenever it snows, potentially as part of emerging virtual power plants that aggregate distributed resources, study co-author and UCLA assistant researcher Maher El-Kady explained.

The device also serves as a weather-monitoring station by recording how much snow is falling and from where; as well as the direction and speed of the wind.

The team said they also want to incorporate their device into weather sensors to help them better acquire and transmit electronic signals, supporting initiatives to use AI for energy savings across local grids. They said several Toronto-based companies -- which they couldn’t name -- have expressed interest in partnering with them.

Selvaganapathy said the device would hop on the trend of “sensors being incorporated into what we wear, into our homes and even to detect electricity theft in some markets in order to monitor a lot of the things that are important to us”

But the device’s arguably larger potential use is being integrated into technology to monitor athletes and their performances during winter sports, such as hiking, skiing and cross-country skiing.

Up to now, the movement patterns used during cross-country skiing couldn’t be detected by a smart watch, but this device may be able to.

Scientists such as Kaner believe the technology could usher in a new era of self-monitoring devices to assess an athlete’s performance while they’re running, walking or jumping.

The device is simply a proof of concept and the next step would be figuring out how to generate more electricity and integrate it into all of these potential devices, Selvaganapathy said.

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Maine Climate Council Act targets 80% renewable power by 2030 and 100% by 2050, slashing greenhouse gas emissions via clean electricity, grid procurement, long-term contracts, wind and hydro integration, resilience planning, and carbon sequestration.

Key Points

A Maine policy forming a Climate Council to reach 80% renewables in 2030 100% in 2050 and cut greenhouse gas emissions.

✅ 80% renewable electricity by 2030; 100% by 2050.

✅ 45% GHG cut by 2030; 80% by 2050.

✅ Utility procurement authority for clean capacity and energy.

The winds of change have shifted and are blowing Northward, as Maine’s Governor, Janet T. Mills, has put forth an act establishing a Climate Council to guide the state’s consumption to 80% renewable electricity in 2030 and 100% by 2050, echoing New York's Green New Deal ambitions underway.

The act, LR 2478 (pdf), also sets a goal of reducing greenhouse gas emissions by 45% in 2030 and 80% by 2050. The document will be submitted to the state Legislature for consideration.

The commission would have the authority to direct investor owned transmission and distribution utilities to run competitive procurement processes, and enter into long-term contracts for capacity resources, energy resources, renewable energy credit contracts, and participate in regional programs, as these all lead toward the clean electricity and emissions-reducing goals that mirror California's 100% mandate debates today.

The Climate Council would convene industry working groups, including Scientific and Technical, Transportation, Coastal and Marine, Energy, and Building & Infrastructure working groups, plus others as needed, where examples like New Zealand's electricity transition could inform discussions.

Membership within the council would include two members of the State Senate, two members of the House, a tribal representative, many department commissioners (Education, Defense, Transportation, etc.), multiple directors, business representatives, environmental non-profit members, and climate science and resilience representatives as well.

The council would update the Maine State Climate Plan every four years, and solicit input from the public and report out progress on its goals every two years, similar to planning underway in Minnesota's carbon-free plan framework. The first Climate Action Plan would be submitted to the legislature by December 1, 2020.

Specifically, the responsibilities of the Scientific and Technical Subcommittee were laid out. The group would be scheduled to meet at least every six months, beginning no later than October 1, 2019. The group would be tasked with reviewing existing scientific literature, including net-zero electricity pathways research, to use it as guidance, recognizing gaps in the state’s knowledge, and guiding outside experts to ascertain this knowledge.  The group would consider ocean acidification, and climate change effects on the state’s species; establish science-based sea-level rise projections for the state’s coastal regions by December 1, 2020; create a climate risk map for flooding and extreme weather events; and consider carbon sequestration via biomass growth.

The state’s largest power plants (above image), generate about 31% from gas, 28% from wood and 41% from hydro+wind. Already, the state has a very clean electricity profile, much like efforts to decarbonize Canada's power sector continue apace. Below, the U.S. Energy Information Administration (EIA) notes that 51% of electricity generation within the state comes from mostly wind+hydro, with a small touch from solar power. The state also gets 24% from wood and other biomass, which would lead some to argue that the state is already at 75% “renewable electricity”. The Governor’s document does reference wind power specifically as a renewable, however, no other specific electricity source. And there is much reference to forestry, agriculture, and logging – specifically noting carbon sequestration – but nothing regarding electricity.

The state’s final 25% of electricity mostly comes from natural gas, even as renewable electricity momentum builds across North America, with this author choosing to put “other” under the fossil percentage noted above.

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BC Hydro Ice Storm Response to Fraser Valley power outages highlights freezing rain impacts, round the clock crews, infrastructure challenges, and climate change risks across the Lower Mainland during winter weather and restoration efforts.

Key Points

A plan for freezing rain events that prioritizes safety, rapid repairs, and clear communication to restore power.

✅ Prioritizes hazards, critical loads, and public safety first

✅ Deploys crews, contractors, and equipment across affected areas

✅ Addresses climate risks without costly undergrounding expansion

Call it the straw that broke the llama's back.

The loss of power during recent Fraser Valley ice storms meant Jennifer Quick, who lives on a Mission farm, had no running water, couldn't cook with appliances and still had to tend to a daughter sick with stomach flu.

As if that wasn't enough, she had to endure the sight of her shivering llamas.

"I brought them outside at one point and when I brought them back in, they had icicles on their fur," she said, adding the animals stayed in the warmth of their barn from then on.

For three and a half days, Quick and her family were among more than 160,000 BC Hydro customers in the Fraser Valley left in the dark after ice storms whipped through the region.

BC Hydro expects to get all customers back online Tuesday, five days after the storm hit.

And with another storm possibly on the horizon, the utility is defending its response to the treacherous weather, noting that windstorm power outages can be widespread.

BC Hydro spokesperson Mora Scott said the utility has a "best in class" storm response system, similar to PG&E winter storm prep in the U.S.

"In a typical storm situation we normally have 95 per cent of our customers back up within 24 hours. Ice storms are different and obviously this was an atypical storm for us," she said.

Scott said that in this case, the utility got power back on for 75 per cent of customers within 24 hours. It took the work of 450 employees called in from around B.C., working around the clock, a mobilization echoed by Sudbury Hydro crews after a storm, she said.

The work was complicated by trees falling near crews, icy roads, low visibility and even substations so frozen over the ice had to be melted off with blowtorches.

She said that in the long term, BC Hydro has no plans to make changes to how it responds to extreme ice storms or how infrastructure is built.

"Seeing ice build up in the Lower Mainland like this is a rare event," she said. "So to build for extremes like that probably doesn't make a lot of sense."

Climate change will bring storms

But CBC meteorologist Johanna Wagstaffe said that might not always be the case as climate change continues to impact our planet.

"The less severe winter events, like light snowfall, will happen less often," she said. "But the disruptive events — like last week's storm — will actually happen more often and we are already seeing this shift happen."

Marc Eliesen, a former CEO of BC Hydro in the early 1990s, said the utility needs to keep that in mind when planning for worst-case scenarios.

"This [storm] is a condition characteristic of the weather in the east, particularly in Ontario and Quebec, where freezing rain outages in Quebec are more common, which is organized to deal with freezing rain and heavy snow on the lines," he said. "This is a new phenomenon for British Columbia."

Eliesen questions whether BC Hydro has adequate equipment and crew training to deal with ice storms if they become more frequent, pointing to Hydro One storm restoration in Ontario as a comparison.

'Always something we can learn'

Scott disagrees with some of Eliesen's points.

She said some of the crews called in to deal with the recent storm come from northern B.C. and the Interior and have plenty of experience with snow.

"There's always something we can learn in every major storm situation," she said.

The idea of putting power lines underground was raised by some CBC readers and listeners, but Scott said running underground lines is five to 10 times the cost of running lines on pole, so it is done sparingly. Besides, equipment like substations and transmission lines need to be kept aboveground.

Meanwhile, Wagstaffe said that beginning Thursday, wintry weather could return to the Lower Mainland.

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EV Charging Infrastructure Incentives are expanding as utilities fund public chargers, Level 2 networks, DC fast charging, grid-managed off-peak programs, and equitable access across Ohio, New Jersey, and Florida to accelerate clean transportation.

Key Points

Utility-backed programs funding Level 2 and DC fast chargers, managing grid demand, and expanding EV equity.

✅ Incentives for Level 2 and DC fast public charging stations.

✅ Grid-friendly off-peak charging to balance demand.

✅ Equity targets place chargers in low-income communities.

Electric providers in Florida, Ohio and New Jersey recently announced plans to expand electric vehicle charging networks and infrastructure through various incentive programs that could add thousands of new public chargers in the next several years.

Elsewhere, utilities are advancing similar efforts, with Michigan EV programs proposing more than $20 million for charging infrastructure to accelerate adoption.

American Electric Power in Ohio will offer nearly $10 million in incentives toward the build out of 375 EV charging stations throughout the company's service territory, which largely includes Columbus.

Meanwhile, the Public Service Electric and Gas Company (PSE&G), an electric utility provider in New Jersey, has proposed a six-year plan to support the development of nearly 40,000 electric vehicle chargers across a wide range of customers and sectors, said Francis Sullivan, a spokesperson for PSE&G.

And Duke Energy in Florida is installing up to 530 EV charging stations across its service area, as part of its Park and Plug pilot program, which will be making the charging ports available in multifamily housing complexes, workplaces and other high traffic areas.

"We are bringing cleaner energy to Florida through 700 megawatts of new universal solar, and we are helping our customers to bring clean transportation to the state as well," Catherine Stempien, Duke Energy Florida president, said in a statement. "We are committed to providing smarter, cleaner energy alternatives for all our customers."

The project in Ohio is making incentive funding available to government organizations, multifamily housing developments and workplaces, covering from 50 percent to all of the costs. The plan, to be rolled out in the next four years, aims to incentivize the development of 300 level-two chargers and 75 "fast chargers" capable of charging a car's battery in minutes rather than hours.

"I think what's interesting about what we're seeing now in the industry is that electric vehicles and electric vehicle charging are expanding beyond California, and like other Pacific Coast states," said Scott Fisher, vice president of marketing at Greenlots, maker of car chargers and software. Greenlots has been selected as one of the companies to provide the chargers for the AEP project.

California has occupied the lion's share of the electric vehicle market, making up about 5 percent of the cars on the state's highways. The U.S. market sits at about 1.5 percent. However, indications show the EV boom may be set to take off as more models are being rolled out, and prices are making the electric cars more competitive with their gas-powered counterparts. The group Securing America's Future Energy (SAFE) announced the one-millionth electric vehicle is on course to be sold in the United States this month.

In a statement, Ben Prochazka, vice president of the Electrification Coalition, an EV advocacy group, called this "a major milestone and brings us one step closer to reducing our transportation system's dependence on oil. This is a direct result of the tireless efforts by communities and advocates throughout the 'EV ecosystem.'"

In New Jersey, PSE&G's efforts -- which are part of the company's proposed Clean Energy Future program -- will not only focus on building out the charging infrastructure, but structure car recharging to control charging and encourage residents to charge their cars during off-peak times.

"For now, with a modest number of charging stations in the market, it's not a huge problem. But over time, as you're putting in many thousands of these stations, what you want to make sure is that those stations are operating in sync with state power grids, where you don't have people all charging at the same time at like 5 p.m. on a hot summer day," said Fisher.

PSE&G also plans to offer incentives to encourage the development of level-two chargers and DC fast-chargers, as well as "provide grants and incentives for 100 electric school buses and EV charging infrastructure at school districts in PSE&G's service territory," said Sullivan.

"PSE&G will also help fund electrification projects at customer locations such as ports, airports and transit facilities," Sullivan added, via email.

Utilities and transportation planners are also keeping the concept of equity in mind -- to ensure EVs are adopted by more than just the Tesla owner -- and will also focus on placing infrastructure in low-income areas.

"Ten percent of the stations will be in low income areas, defined by census blocks," said Scott Blake, a communications consultant at AEP in Columbus.

Duke Energy also announced 10 percent of the chargers it is installing in Florida will be in "income-qualified communities," according to a company press release.

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