Ontario looks to build on electricity deal with Quebec


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Ontario-Quebec Electricity Deal explores hydro imports, terawatt hours, electricity costs, greenhouse gas cuts, and baseload impacts, amid debates on Pickering nuclear operations and competitive procurement in Ontario's long-term energy planning.

 

Key Points

A proposed hydro import deal from Quebec, balancing costs, emissions, and reliability for Ontario electricity customers.

✅ Draft 20-year, 8 TWh offer reported by La Presse disputed

✅ Ontario seeks lower costs and GHG cuts versus alternatives

✅ Not a baseload replacement; Pickering closure not planned

 

Ontario is negotiating a possible energy swap agreement to buy electricity from Quebec, but the government is disputing a published report that it is preparing to sign a deal for enough electricity to power a city the size of Ottawa.

La Presse reported Tuesday that it obtained a copy of a draft, 20-year deal that says Ontario would buy eight terawatt hours a year from Quebec – about 6 per cent of Ontario’s consumption – whether the electricity is consumed or not.

Ontario Energy Minister Glenn Thibeault’s office said the province is in discussions to build on an agreement signed last year for Ontario to import up to two terawatt hours of electricity a year from Quebec.

 

But his office released a letter dated late last month to his Quebec counterpart, in which Mr. Thibeault said the offer extended in June was unacceptable because it would increase the average residential electricity bill by $30 a year.

“I am hopeful that your continued support and efforts will help to further discussions between our jurisdictions that could lead to an agreement that is in the best interest of both Ontario and Quebec,” Mr. Thibeault wrote July 27 to Pierre Arcand.

Ontario would prepare a “term sheet” for the next stage of discussions ahead of the two ministers meeting at the Energy and Mines Ministers Conference later this month in New Brunswick, Mr. Thibeault wrote.

Any future agreements with Quebec will have to provide a reduction in Ontario electricity rates compared with other alternatives and demonstrate measurable reductions in greenhouse gas emissions, he wrote.

Progressive Conservative Leader Patrick Brown said Ontario doesn’t need eight terawatt hours of additional power and suggested it means the Liberal government is considering closing power facilities such as the Pickering nuclear plant early.

A senior Energy Ministry official said that is not on the table. The government has said it intends to keep operating two units at Pickering until 2022, and the other four units until 2024.

Even if the Quebec offer had been accepted, the energy official said, that power wouldn’t have replaced any of Ontario’s baseload power because it couldn’t have been counted on 24 hours a day, 365 days a year.

The Society of Energy Professionals said Mr. Thibeault was right to reject the deal, but called on him to release the Long-Term Energy Plan – which was supposed to be out this spring – before continuing negotiations.

Some commentators have argued for broader reforms to address Ontario's hydro system challenges, urging policymakers to review all options as negotiations proceed.

The Ontario Energy Association said the reported deal would run counter to the government’s stated energy objectives amid concerns over electricity prices in the province.

“Ontarians will not get the benefit of competition to ensure it is the best of all possible options for the province, and companies who have invested in Ontario and have employees here will not get the opportunity to provide alternatives,” president and chief executive Vince Brescia said in a statement. “Competitive processes should be used for any new significant system capacity in Ontario.”

The Association of Power Producers of Ontario said it is concerned the government is even considering deals that would “threaten to undercut a competitive marketplace and long-term planning.”

“Ontario already has a surplus of energy, so it’s very difficult to see how this deal or any other sole-source deal with Quebec could benefit the province and its ratepayers,” association president and CEO David Butters said in a statement.

The Ontario Waterpower Association also said such a deal with Quebec would “present a significant challenge to continued investment in waterpower in Ontario.”

 

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Canada’s Opportunity in the Global Electricity Market

Canada Clean Electricity Exports leverage hydroelectric power, energy storage, and transmission interconnections to meet rising IEA-forecast demand, support electrification, decarbonize grids, and attract green finance with stable policy and advanced technology.

 

Key Points

Canada's cross-border power sales from hydro and renewables, enabled by storage, transmission, and supportive policy.

✅ Hydro leads generation; expand transmission interties to the US

✅ Deploy storage to balance wind and solar variability

✅ Streamline regulation and green finance to scale exports

 

As global electricity demand continues to surge, Canada finds itself uniquely positioned to capitalize on this expanding market by choosing an electric, connected and clean pathway that scales with demand. With its vast natural resources, advanced technology, and stable political environment, Canada can play a crucial role in meeting the world’s energy needs while also advancing its own economic interests.

The International Energy Agency (IEA) has projected that global electricity demand will grow significantly over the next decade, driven by factors such as population growth, urbanization, and the increasing electrification of various sectors, including transportation and industry. This presents a golden opportunity for Canada to bolster its energy security as it boasts an abundance of renewable energy sources, particularly hydroelectric power. Currently, hydroelectricity accounts for about 60% of Canada’s total electricity generation, making it one of the largest producers of this clean energy source in the world.

The growing emphasis on renewable energy aligns perfectly with Canada’s strengths, with the Prairie Provinces emerging as leaders in new wind and solar capacity across the country. As countries worldwide strive to reduce their carbon footprints and transition to greener energy solutions, Canada’s clean energy resources can be harnessed not only to meet domestic needs but also to export electricity to neighboring countries and beyond. The U.S., for instance, is already a significant market for Canadian electricity, with interconnections facilitating the flow of power across borders. Expanding these connections and investing in infrastructure could further increase Canada’s electricity exports.

Moreover, advancements in energy storage technology present another avenue for Canada to enhance its role in the global electricity market. With the rise of intermittent energy sources like wind and solar, the ability to store excess electricity generated during peak production times becomes essential. Canada’s expertise in technology and innovation positions it well to develop and deploy energy storage solutions that can stabilize the grid through grid modernization projects and ensure a reliable supply of electricity.

Additionally, Canada’s commitment to reducing greenhouse gas emissions and combating climate change aligns with the global shift towards sustainable energy. By investing in renewable energy projects and supporting research and development, Canada can not only meet its climate targets, including zero-emissions electricity by 2035, but also attract international investment. Green financing initiatives are becoming increasingly popular, and Canada can leverage its reputation as a leader in environmental stewardship to tap into this growing market.

However, to fully realize these opportunities, Canada must address some key challenges. Regulatory hurdles, infrastructure limitations, and the need for a coordinated national energy strategy are critical issues that must be navigated. Streamlining regulations and fostering collaboration between federal and provincial governments will be essential in creating a conducive environment for investment in renewable energy projects.

Furthermore, public acceptance and community engagement are vital components of developing new energy projects, especially where solar power adoption lags and outreach is needed. Ensuring that local communities benefit from these initiatives—whether through job creation, economic investment, or shared revenues—will help garner support and facilitate smoother project implementation.

In addition to domestic efforts, Canada should also position itself as a global leader in energy diplomacy. By collaborating with other nations to share best practices, technologies, and resources, Canada can strengthen its influence in international energy discussions. Engaging in multilateral initiatives aimed at addressing energy poverty and promoting sustainable development will not only enhance Canada’s standing on the world stage but also open doors for Canadian companies to expand their reach.

In conclusion, as the global demand for electricity rises, Canada stands at a crossroads, with a tremendous opportunity to lead in the clean energy sector. By leveraging its natural resources, investing in technology, and fostering international partnerships, Canada can not only meet its energy needs but also pursue zero-emission electricity by 2035 while positioning itself as a key player in the global electricity market. The path forward will require strategic planning, investment, and collaboration, but the potential rewards are significant—both for Canada and the planet.

 

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Americans Keep Using Less and Less Electricity

U.S. Electricity Demand Decoupling signals GDP growth without higher load, driven by energy efficiency, LED adoption, services-led output, and rising renewables integration with the grid, plus EV charging and battery storage supporting decarbonization.

 

Key Points

GDP grows as electricity use stays flat, driven by efficiency, renewables, and a shift toward services and output.

✅ LEDs and codes cut residential and commercial load intensity.

✅ Wind, solar, and gas gain share as coal and nuclear struggle.

✅ EVs and storage can grow load and enable grid decarbonization.

 

By Justin Fox

Economic growth picked up a little in the U.S. in 2017. But electricity use fell, with electricity sales projections continuing to decline, according to data released recently by the Energy Information Administration. It's now been basically flat for more than a decade:


 

Measured on a per-capita basis, electricity use is in clear decline, and is already back to the levels of the mid-1990s.

 


 

Sources: U.S. Energy Information Administration, U.S. Bureau of Economic Analysis

*Includes small-scale solar generation from 2014 onward

 

I constructed these charts to go all the way back to 1949 in part because I can (that's how far back the EIA data series goes) but also because it makes clear what a momentous change this is. Electricity use rose and rose and rose and then ... it didn't anymore.

Slower economic growth since 2007 has been part of the reason, but the 2017 numbers make clear that higher gross domestic product no longer necessarily requires more electricity, although the Iron Law of Climate is often cited to suggest rising energy use with economic growth. I wrote a column last year about this big shift, and there's not a whole lot new to say about what's causing it: mainly increased energy efficiency (driven to a remarkable extent by the rise of LED light bulbs), and the continuing migration of economic activity away from making tangible things and toward providing services and virtual products such as games and binge-watchable TV series (that are themselves consumed on ever-more-energy-efficient electronic devices).

What's worth going over, though, is what this means for those in the business of generating electricity. The Donald Trump administration has made saving coal-fired electric plants a big priority; the struggles of nuclear power plants have sparked concern from multiple quarters. Meanwhile, U.S. natural gas production has grown by more than 40 percent since 2007, thanks to hydraulic fracturing and other new drilling techniques, while wind and solar generation keep making big gains in cost and market share. And this is all happening within the context of a no-growth electricity market.

In China, a mystery in China's electricity data has complicated global comparisons.

 

Here are the five main sources of electric power in the U.S.:


 

The big story over the past decade has been coal and natural gas trading places as the top fuel for electricity generation. Over the past year and a half coal regained some of that lost ground as natural gas prices rose from the lows of early 2016. But with overall electricity use flat and production from wind and solar on the rise, that hasn't translated into big increases in coal generation overall.

Oh, and about solar. It's only a major factor in a few states (California especially), so it doesn't make the top five. But it's definitely on the rise.

 

 

What happens next? For power generators, the best bet for breaking out of the current no-growth pattern is to electrify more of the U.S. economy, especially transportation. A big part of the attraction of electric cars and trucks for policy-makers and others is their potential to be emissions-free. But they're only really emissions-free if the electricity used to charge them is generated in an emissions-free manner -- creating a pretty strong business case for continuing "decarbonization" of the electric industry. It's conceivable that electric car batteries could even assist in that decarbonization by storing the intermittent power generated by wind and solar and delivering it back onto the grid when needed.

I don't know exactly how all this will play out. Nobody does. But the business of generating electricity isn't going back to its pre-2008 normal. 

 

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New Rules for a Future Puerto Rico Microgrid Landscape

Puerto Rico Microgrid Regulations outline renewable energy, CHP, and storage standards, enabling islanded systems, PREPA interconnection, excess energy sales, and IRP alignment to boost resilience, distributed resources, and community power across the recovering grid.

 

Key Points

Rules defining microgrids, requiring 75 percent renewables or CHP, and setting interconnection and PREPA fee frameworks.

✅ 75 percent renewables or CHP; hybrids allowed

✅ Registration, engineer inspection, and annual generation reports

✅ PREPA interconnection fees; excess energy sales permitted

 

The Puerto Rico Energy Commission unveiled 29 pages of proposed regulations last week for future microgrid installations on the island.

The regulations, which are now open for 30 days of public comment, synthesized pages of responses received after a November 10 call for recommendations. Commission chair José Román Morales said it’s the most interest the not-yet four-year-old commission has received during a public rulemaking process.

The goal was to sketch a clearer outline for a tricky-to-define concept -- the term "microgrid" can refer to many types of generation islanded from the central grid -- as climate pressures on the U.S. grid mount and more developers eye installations on the recovering island.

“There’s not a standard definition of what a microgrid is, not even on the mainland,” said Román Morales.

According to the commission's regulation, “a microgrid shall consist, at a minimum, of generation assets, loads and distribution infrastructure. Microgrids shall include sufficient generation, storage assets and advanced distribution technologies, including advanced inverters, to serve load under normal operating and usage conditions.”

All microgrids must be renewable (with at least 75 percent of power from clean energy), combined heat and power (CHP) or hybrid CHP-and-renewable systems. The regulation applies to microgrids controlled and owned by individuals, customer cooperatives, nonprofit and for-profit companies, and cities, but not those owned by the Puerto Rico Electric Power Authority (PREPA). Owners must submit a registration application for approval, including a certification of inspection from a licensed electric engineer, and an annual fuel, generation and sales report that details generation and fuel source, as well as any change in the number of customers served.

Microgrids, like the SDG&E microgrid in Ramona in California, can interconnect with the PREPA system, but if a microgrid will use PREPA infrastructure, owners will incur a monthly fee. That amounts to $25 per customer up to a cap of $250 per month for small cooperative microgrids. The cost for larger systems is calculated using a separate, more complex equation. Operators can also sell excess energy back to PREPA.

 

Big goals for the island's future grid

In total, 53 groups and companies, including Sunnova, AES, the Puerto Rico Solar Energy Industries Association (PR-SEIA), the Advanced Energy Management Alliance (AEMA), and the New York Smart Grid Consortium, submitted their thoughts about microgrids or, in many cases, broader goals for the island’s future energy system. It was a quick turnaround: The Puerto Rico Energy Commission offered a window of just 10 days to submit advice, although the commission continued to accept comments after the deadline.

“PREC wanted the input as fast as possible because of the urgency,” said AES CEO Chris Shelton.

AES’ plan includes a network of “mini-grids” that could range in size from several megawatts to one large enough to service the entire city of San Juan.

“The idea is, you connect those to each other with transmission so they can have a co-optimized portfolio effect and lower the overall cost,” said Shelton. “But they would be largely autonomous in a situation where the tie-lines between them were broken.”

According to estimates provided in AES’ filing, utility-scale solar installations over 50 megawatts on the island could cost between $40 and $50 per megawatt-hour. Those prices make solar located near load centers an economic alternative to the island’s fossil-fuel generating plants. The utility’s analysis showed that a 10,000-megawatt solar system could replace 12,000 gigawatt-hours of fossil generation, with 25 gigawatt-hours of battery storage leveling out load throughout the day. Puerto Rico’s peak load is 3,000 megawatts.

In other filings, PR-SEIA urged a restructuring of FEMA funds so they’re available for microgrid development. GridWise Alliance wrote that plans should consider cybersecurity, and AEMA recommended the commission develop an integrated resource plan (IRP) that includes distributed energy resources, microgrids and non-wires alternatives.

 

An air of optimism, though 1.5 million are still without power

After the commission completes the microgrid rulemaking, a new IRP is next on the commission’s to-do list. PREPA must file that plan in July, and regulators are working furiously to make sure it incorporates the recent flood of rebuilding recommendations from the energy industry.

Though the commission has the final say when it comes to approval of the plan, PREPA will lead the IRP process. The utility’s newly formed Transformation Advisory Council (TAC), a group of 11 energy experts, will contribute.

With that group, along with New York’s Resiliency Working Group, lessons from California's grid transition, the Energy Commission, the utility itself, and the dozens of other clean energy experts and entrepreneurs who want to offer their two cents, the energy planning process has a lot of moving parts. But according to Julia Hamm, CEO of the Smart Electric Power Alliance and a member of both the Energy Resiliency Working Group and the TAC, those working to establish standards for Puerto Rico’s future are hitting their stride.

“Certainly over the past three months, it has been a bit of a challenge to ensure that everybody has been coordinating efforts. Just over the past couple of weeks, we’ve seen some good progress on that front. We’re starting to see a lot more communication,” she said, adding that an air of optimism has settled on the process. “The key stakeholders all have a very common vision for Puerto Rico when it comes to the power sector.”

Nisha Desai, a PREPA board member who is liaising with the TAC, affirmed that collaborators are on the same page. “Everyone is violently in agreement that the future of Puerto Rico involves renewables, microgrids and distributed generation,” she said.

The TAC will hold its first in-person meeting in mid-January, and has already consulted with the utility on its formal fiscal plan submission, due January 10.

Though many taking part in the process feel the once-harried recovery is beginning to adopt a more organized approach, Desai acknowledges that “there are a lot of people in Puerto Rico who feel forgotten.”

Puerto Rico’s current generation sits at just 72.6 percent, in a nation facing longer, more frequent outages due to extreme weather. The government recently offered its first estimate that about half the island, 1.5 million residents, remains without power.

In late December and into January, 1,500 more crewmembers from 18 utilities in states as far flung as Minnesota, Missouri and Arizona will land on the island to aid further restoration through mutual aid agreements.

“The system is getting up to speed, getting to 100 percent, but there’s still some instability,” said Román Morales. “Right now it’s a matter of time.”

 

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PG&E Supports Local Communities as It Pays More Than $230 Million in Property Taxes to 50 California Counties

PG&E property tax payments bolster counties, education, public safety, and infrastructure across Northern and Central California, reflecting semi-annual levies tied to utility assets, capital investments, and economic development that serve 16 million customers.

 

Key Points

PG&E property tax payments are semi-annual county taxes funding public services and linked to utility infrastructure.

✅ $230M paid for Jul-Dec 2017 across 50 California counties

✅ Estimated $461M for FY 2017-2018, up 12% year over year

✅ Investments: $5.9B in grid, Gas Safety Academy, control center

 

Pacific Gas and Electric Company (PG&E) paid property taxes of more than $230 million this fall to the 50 counties where the energy company owns property and operates gas and electric infrastructure that serves 16 million Californians. The tax payments help support essential public services like education and public health and safety actions across the region.

The semi-annual property tax payments made today cover the period from July 1 to December 31, 2017.

Total payments for the full tax year of July 1, 2017 to June 30, 2018 are estimated to total more than $461 million—an increase of $50 million, or 12 percent, compared with the prior fiscal year, even as customer rates are expected to stabilize in the years ahead.

“Property tax payments provide crucial resources to the many communities where we live and work, supporting everything from education to public safety. By continuing to make local investments in gas and electric infrastructure, we are not only creating one of the safest and most reliable energy systems in the country, including wildfire risk reduction programs and related efforts, we’re investing in the local economy and helping our communities thrive,” said Jason Wells, senior vice president and chief financial officer for PG&E.

PG&E invested more than $5.7 billion last year and expects to invest $5.9 billion this year to enhance and upgrade its gas and electrical infrastructure amid power line fire risks across Northern and Central California.

Some recent investments include the construction of PG&E’s $75 millionGas Safety Academy in Winters in Yolo County, which opened in September. Last year, PG&E opened a $36 million, state-of-the-art electric distribution control center in Rocklin.

PG&E supports the communities it serves in a variety of ways. In 2016, PG&E provided more than $28 million in charitable contributions to enrich local educational opportunities, preserve the environment, and support economic vitality and emergency preparedness and safety, including its Wildfire Assistance Program for impacted residents. PG&E employees provide thousands of hours of volunteer service in their local communities. The company also offers a broad spectrum of economic development services to help local businesses grow.

 

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EVs could drive 38% rise in US electricity demand, DOE lab finds

EV-Driven Electricity Demand Growth will reshape utilities through electrification, EV adoption, grid modernization, and ratebasing of charging, as NREL forecasts rising terawatt-hours, CAGR increases, and demand-side flexibility to manage emissions and reliability.

 

Key Points

Growth in power consumption fueled by EV adoption and electrification, increasing utility sales and grid investment.

✅ NREL projects 20%-38% higher U.S. load by 2050

✅ Utilities see CAGR up to 1.6% and 80 TWh/year growth

✅ Demand-side flexibility and EV charging optimize grids

 

Utilities have struggled with flat demand for years, but analysis by the National Renewable Energy Laboratory predicts steady growth across the next three decades — largely driven by the adoption of electric vehicles, including models like the Tesla Model 3 that are reshaping expectations.

The study considers three scenarios, a reference case and medium- and high-adoption electrification predictions. All indicate demand growth, but in the medium and high scenarios for 2050, U.S. electricity consumption increases by 20% and 38%, respectively, compared to business as usual.

Utilities could go from stagnant demand to compound annual growth rates of 1.6%, which would amount to sustained absolute growth of 80 terawatt-hours per year.

"This unprecedented absolute growth in annual electricity consumption can significantly alter supply-side infrastructure development requirements," the report says, and could challenge state power grids in multiple regions.

NREL's Trieu Mai, principal investigator for the study, cautions that more research is needed to fully assess the drivers and impacts of electrification, "as well as the role and value of demand-side flexibility."

"Although we extensively and qualitatively discuss the potential drivers and barriers behind electric technology adoption in the report, much more work is needed to quantitatively understand these factors," Mai said in a statement.

However, utilities have largely bought into the dream.

"Electric vehicles are the biggest opportunity we see right now," Energy Impact Partners CEO Hans Kobler told Utility Dive. And the impact could go beyond just higher kilowattt-hour sales, particularly as electric truck fleets come online.

"When the transportation sector is fully electrified, it will result in around $6 trillion in investment," Kobler said. "Half of that is on the infrastructure side of the utility." And the industry can also benefit through ratebasing charging stations and managing the new demand.

One benefit that NREL's report points to is the possibility of "expanded value streams enabled by electric and/or grid-connected technologies," such as energy storage and mobile chargers that enhance flexibility.

"Many electric utilities are carefully watching the trend toward electrification, as it has the potential to increase sales and revenues that have stagnated or fallen over the past decade," the report said, highlighting potential benefits for all customers as adoption grows. "Beyond power system planning, other motivations to study electrification include its potential to impact energy security, emissions, and innovation in electrical end-use technologies and overall efficient system integration. The impacts of electrification could be far-reaching and have benefits and costs to various stakeholders."

 

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Electricity distributors warn excess solar power in network could cause blackouts, damage infrastructure

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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