Training Program Connects Young Nova Scotians to Energy Sector

Noncarbon Electricity Investment Strategy helps utilities hedge policy uncertainty, carbon tax risks, and emissions limits by scaling wind, solar, and CCS, avoiding stranded assets while balancing costs, reliability, and climate policy over decades.

Key Points

A strategy for utilities to invest 20-30 percent of capacity in low carbon sources to hedge emissions and carbon risks.

✅ Hedges future carbon tax and emissions limits

✅ Targets 20-30 percent of new generation from clean sources

✅ Reduces stranded asset risk and builds renewables capacity

When utility executives make decisions about building new power plants, a lot rides on their choices. Depending on their size and type, new generating facilities cost hundreds of millions or even billions of dollars. They typically will run for 40 or more years — 10 U.S. presidential terms. Much can change during that time.

Today one of the biggest dilemmas that regulators and electricity industry planners face is predicting how strict future limits on greenhouse gas emissions will be. Future policies will affect the profitability of today’s investments. For example, if the United States adopts a carbon tax 10 years from now, it could make power plants that burn fossil fuels less profitable, or even insolvent.

These investment choices also affect consumers. In South Carolina, utilities were allowed to charge their customers higher rates to cover construction costs for two new nuclear reactors, which have now been abandoned because of construction delays and weak electricity demand. Looking forward, if utilities are reliant on coal plants instead of solar and wind, it will be much harder and more expensive for them to meet future emissions targets, even as New Zealand's electrification push accelerates abroad. They will pass the costs of complying with these targets on to customers in the form of higher electricity prices.

With so much uncertainty about future policy, how much should we be investing in noncarbon electricity generation in the next decade? In a recent study, we proposed optimal near-term electricity investment strategies to hedge against risks and manage inherent uncertainties about the future.

We found that for a broad range of assumptions, 20 to 30 percent of new generation in the coming decade should be from noncarbon sources such as wind and solar energy across markets. For most U.S. electricity providers, this strategy would mean increasing their investments in noncarbon power sources, regardless of the current administration’s position on climate change.

Many noncarbon electricity sources — including wind, solar, nuclear power and coal or natural gas with carbon capture and storage — are more expensive than conventional coal and natural gas plants. Even wind power, which is often mentioned as competitive, is actually more costly when accounting for costs such as backup generation and energy storage to ensure that power is available when wind output is low.

Over the past decade, federal tax incentives and state policies designed to promote clean electricity sources spurred many utilities to invest in noncarbon sources. Now the Trump administration is shifting federal policy back toward promoting fossil fuels. But it can still make economic sense for power companies to invest in more expensive noncarbon technologies if we consider the potential impact of future policies.

How much should companies invest to hedge against the possibility of future greenhouse gas limits? On one hand, if they invest too much in noncarbon generation and the federal government adopts only weak climate policies throughout the investment period, utilities will overspend on expensive energy sources.

On the other hand, if they invest too little in noncarbon generation and future administrations adopt stringent emissions targets, utilities will have to replace high-carbon energy sources with cleaner substitutes, which could be extremely costly.

Economic modeling with uncertainty

We conducted a quantitative analysis to determine how to balance these two concerns and find an optimal investment strategy given uncertainty about future emissions limits. This is a core choice that power companies have to make when they decide what kinds of plants to build.

First we developed a computational model that represents the sectors of the U.S. economy, including electric power. Then we embedded it within a computer program that evaluates decisions in the electric power sector under policy uncertainty.

The model explores different electric power investment decisions under a wide range of future emissions limits with different probabilities of being implemented. For each decision/policy combination, it computes and compares economy-wide costs over two investment periods extending from 2015 to 2030.

We looked at costs across the economy because emissions policies impose costs on consumers and producers as well as power companies. For example, they may lead to higher electricity, fuel or product prices. By seeking to minimize economy-wide costs, our model identifies the investment decision that produces the greatest overall benefits to society.

More investments in clean generation make economic sense

We found that for a broad range of assumptions, the optimal investment strategy for the coming decade is for 20 to 30 percent of new generation to be from noncarbon sources. Our model identified this as the best level because it best positions the United States to meet a wide range of possible future policies at a low cost to the economy.

From 2005-2015, we calculated that about 19 percent of the new generation that came online was from noncarbon sources. Our findings indicate that power companies should put a larger share of their money into noncarbon investments in the coming decade.

While increasing noncarbon investments from a 19 percent share to a 20 to 30 percent share of new generation may seem like a modest change, it actually requires a considerable increase in noncarbon investment dollars. This is especially true since power companies will need to replace dozens of aging coal-fired power plants that are expected to be retired.

In general, society will bear greater costs if power companies underinvest in noncarbon technologies than if they overinvest. If utilities build too much noncarbon generation but end up not needing it to meet emissions limits, they can and will still use it fully. Sunshine and wind are free, so generators can produce electricity from these sources with low operating costs.

In contrast, if the United States adopts strict emissions limits within a decade or two, they could prevent carbon-intensive generation built today from being used. Those plants would become “stranded assets” — investments that are obsolete far earlier than expected, and are a drain on the economy.

Investing early in noncarbon technologies has another benefit: It helps develop the capacity and infrastructure needed to quickly expand noncarbon generation. This would allow energy companies to comply with future emissions policies at lower costs.

Seeing beyond one president

The Trump administration is working to roll back Obama-era climate policies such as the Clean Power Plan, and to implement policies that favor fossil generation. But these initiatives should alter the optimal strategy that we have proposed for power companies only if corporate leaders expect Trump’s policies to persist over the 40 years or more that these new generating plants can be expected to run.

Energy executives would need to be extremely confident that, despite investor pressure from shareholders, the United States will adopt only weak climate policies, or none at all, into future decades in order to see cutting investments in noncarbon generation as an optimal near-term strategy. Instead, they may well expect that the United States will eventually rejoin worldwide efforts to slow the pace of climate change and adopt strict emissions limits.

In that case, they should allocate their investments so that at least 20 to 30 percent of new generation over the next decade comes from noncarbon sources. Sustaining and increasing noncarbon investments in the coming decade is not just good for the environment — it’s also a smart business strategy that is good for the economy.

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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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UK Free Electricity Debate weighs soaring energy prices against market regulation, renewables, and social equity, examining price caps, funding via windfall taxes, grid investment, and consumer protection in the UK's evolving energy policy landscape.

Key Points

A policy dispute over free power, balancing consumer relief with market stability, renewables, and investment.

✅ Pros: relief for households; boosts efficiency and green adoption.

✅ Cons: risks to market signals, quality, and grid investment.

✅ Policy options: price caps, windfall taxes, targeted subsidies.

In recent months, the debate over free electricity in the UK has intensified, revealing a divide within the energy sector. With soaring energy prices and economic pressures impacting consumers, the discussion around providing free electricity has gained traction. However, the idea has sparked significant controversy among industry stakeholders, each with their own perspectives on the feasibility and implications of such a move.

The Context of Rising Energy Costs

The push for free electricity is rooted in the UK’s ongoing energy crisis, exacerbated by geopolitical tensions, supply chain disruptions, and the lingering effects of the COVID-19 pandemic. As energy prices reached unprecedented levels, households faced the harsh reality of skyrocketing bills, prompting calls for government intervention to alleviate financial burdens.

Supporters of free electricity argue that it could serve as a vital lifeline for struggling families and businesses. The proposal suggests that by providing a certain amount of electricity for free, the government could help mitigate the effects of rising costs while encouraging energy conservation and efficiency.

Industry Perspectives

However, the notion of free electricity has not been universally embraced within the energy sector. Some industry leaders express concerns about the financial viability of such a scheme. They argue that providing free electricity could undermine the market dynamics that incentivize investment in infrastructure and renewable energy, in a market already exposed to natural gas price volatility today. Critics warn that if energy companies are forced to absorb costs, it could lead to diminished service quality and investment in necessary advancements.

Additionally, there are worries about how free electricity could be funded. Proponents suggest that a tax on energy companies could generate the necessary revenue, but opponents question whether this would stifle innovation and competition. The fear is that placing additional financial burdens on energy providers could ultimately lead to higher prices in the long run.

Renewable Energy and Sustainability

Another aspect of the debate centers around the UK’s commitment to transitioning to renewable energy sources. Supporters of free electricity emphasize that such a policy could encourage more widespread adoption of green technologies by making energy more accessible. They argue that by removing the financial barriers associated with energy costs, households would be more inclined to invest in solar panels, heat pumps, and other sustainable solutions.

On the other hand, skeptics contend that the focus should remain on ensuring a stable and reliable energy supply as the UK moves toward its climate goals. They caution against implementing policies that might disrupt the balance of the energy market, potentially hindering the necessary investments in renewable infrastructure.

Government's Role

As discussions unfold, the government’s role in this debate is crucial. Policymakers must navigate the complex landscape of energy regulation, market dynamics, and consumer needs. The government has already introduced measures aimed at assisting vulnerable households, such as energy price caps and direct financial support. However, the question remains whether these initiatives go far enough in addressing the root causes of the energy crisis.

In this context, the government faces pressure from both consumers demanding relief and industry leaders advocating for market stability, including proposals to end the link between gas and electricity prices to curb price volatility. The challenge lies in finding a middle ground that balances immediate support for households with long-term sustainability and investment in the energy sector.

Future Implications

The ongoing debate about free electricity in the UK underscores broader themes related to energy policy, market regulation, and social equity, with rising electricity prices abroad offering context for comparison. As the country navigates its energy transition, the decisions made today will have far-reaching implications for both consumers and the industry.

If the government chooses to pursue a model that includes free electricity, it will need to carefully consider how to implement such a system without jeopardizing the market. Transparency, stakeholder engagement, and thorough impact assessments will be essential to ensure that any new policies are sustainable and equitable.

Conversely, if the concept of free electricity is ultimately rejected, the focus will likely shift back to addressing energy costs through other means, such as enhancing energy efficiency programs or increasing support for vulnerable populations.

The divide within the UK’s energy industry regarding free electricity highlights the complexities of balancing consumer needs with market stability. As the energy crisis continues to unfold, the conversations surrounding this issue will remain at the forefront of public discourse. Ultimately, finding a solution that addresses the immediate challenges while promoting a sustainable energy future will be key to navigating this critical juncture in the UK’s energy landscape.

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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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Maryland Community Solar Program enables renters and condo residents to subscribe to offsite solar, earn utility bill discounts, and support projects across BGE, Pepco, Delmarva, and Potomac Edison territories, with low to moderate income participation.

Key Points

A pilot allowing residents to subscribe to offsite solar and get bill credits and savings, regardless of home ownership.

✅ 5-10 percent discounts on standard utility rates

✅ Available in BGE, Pepco, Delmarva, Potomac Edison areas

✅ Includes low and moderate income subscriber carve-outs

Maryland has launched a pilot program that will allow anyone to power their home with solar panels — even if they are renters or condo-dwellers, or live in the shade of trees.

Solar developers are looking for hundreds of residents to subscribe to six power projects planned across the state, including recently announced sites in Owings Mills and Westminster. Their offers include discounts on standard electric rates.

The developers need a critical mass of customers who are willing to buy the projects’ electricity before they can move forward with plans to install solar panels on about 80 acres. Under state rules, the customer base must include low- and moderate-income residents, many of whom face energy insecurity challenges.

The idea of the community solar program is to tap into the pool of residential customers who don’t want to get their energy from fossil fuels but currently have no way to switch to a cleaner alternative.

That could significantly expand demand for solar projects, said Gary Skulnik, a longtime Maryland solar entrepreneur.

Skulnik is now CEO of Neighborhood Sun, a company recruiting customers for the six projects.

“You’re signing up for a project that won’t exist unless we get enough subscribers,” Skulnik said. “You’re actually getting a new project built.”

It could also stoke simmering conflicts over what sort of land is appropriate for solar development.

The General Assembly authorized the community solar pilot program in 2015. But not-in-my-backyard opposition and concerns about the loss of agricultural land have slowed progress.

Community solar could force more communities to confront those sorts of clashes — and to consider more carefully where solar farms belong.

“We are going to see a lot more solar development in the state,” said Megan Billingsley, assistant director of the Valleys Planning Council in Baltimore County. “One of the things we haven’t seen is any direction or thoughtful planning on where we want to see solar development.”

The General Assembly authorized about 200 megawatts in community solar projects — enough to power about 40,000 households — over three years.

Customers can sign up for projects built within the territory of their electric utility. About half of that solar energy load has been allotted for the region served by Baltimore Gas and Electric Co.

By subscribing to a community solar project, customers won’t actually be getting their electricity from its photovoltaic panels. But their payments will help finance it and, in some cases, complementary battery storage solutions as well.

The Public Service Commission has approved six projects so far: Two in BGE territory, in Owings Mills and near Westminster; one in Pepco territory, in Prince George’s County; two in Delmarva Power and Light territory, in Caroline and Worcester counties; and one in Potomac Edison territory, in Washington County where planning officials have developed proposed recommendations.

More projects are expected to win approval in the next two years.

But none of them can be built unless they catch on with electricity customers. The developers are looking for 2,600 customers statewide.

Skulnik would not say how many customers an individual project needs to get the green light. But he said that the Prince George’s proposal, a 25-acre array atop a Fort Washington landfill is the closest, with about 100 subscribers so far.

The terms of subscription vary by project, but discounts range from 5 percent to 10 percent off utility rates. Customers are asked to commit to the projects for as long as 25 years. (They can break the contracts with advance notice, or if they move to a different utility service area.)

Maryland joins more than a dozen states in advancing community solar projects, as scientists work to improve solar and wind power technology.

Corey Ramsden is an executive for Solar United Neighbors, a nonprofit that promotes the solar industry in eight states and the District of Columbia.

He said potential customers are often confused by the mechanics of subscribing to community solar, or hesitant to commit for years or even decades. The industry is working to answer questions and get people more comfortable with the idea, he said.

But it has been a challenge across the country, including debates over New England grid upgrades, and in Maryland. Advocates for solar say there is broad support for renewable energy generation. The state has set goals to increase green energy use and reduce greenhouse gas emissions.

Still, many Marylanders don’t welcome the reality when a project attempts to move in.

Rural land is often the most desirable for solar developers, because it requires the least effort to prepare for an array of panels. But community groups in those areas have asked whether land historically used for farming is right for a more industrial use.

“People are very much in favor of going for a lot more renewables, for whatever reason,” said Dru Schmidt-Perkins, the former president of the land conservation group 1,000 Friends of Maryland. “That support comes to a screeching halt when land that is perceived to be valuable for other things, whether a historic view­shed or farming, suddenly becomes a target of a location for this new project.”

Such concerns have at least temporarily stalled the momentum for solar across the state. Anne Arundel County had at least five small community solar projects in the pipeline in December when officials decided to pause development for eight months. Baltimore County officials imposed a four-month moratorium on solar development before passing an ordinance last year to limit the size and number of solar farms.

Billingsley said the Valley Plannings Council, which advocates for historic and rural areas in western Baltimore County, is frustrated that there hasn’t been more discussion about which areas the county should target for solar development — and which it shouldn’t.

She said she fears that pressure to expand solar farms across rural lands is only going to grow as community solar projects launch, and as lawmakers in Annapolis talk about more policies to promote investment in renewable energy.

Schmidt-Perkins called community solar “an amazing program” for those who would install solar panels on their roofs if they could. But she said its launch heightens the importance of discussions about a broader solar strategy.

“Most communities are caught a little flat-footed on this and are somewhat at the mercy of an industry that’s chomping at the bit,” she said. “It’s time for Maryland to say, ‘Okay, let’s come up with our plan so that we know how much solar can we really generate in this state on lands that are not conflict-based.’”

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GMP Tesla Powerwall Program replaces utility meters with smart battery storage, enabling virtual power plant services, demand response, and resilient homes, integrating solar readiness, EV charging support, and smart grid controls across Vermont households.

Key Points

Green Mountain Power uses Tesla Powerwalls as smart meters, creating a VPP for demand response and home backup.

✅ $30 monthly for 10 years or $3,000 upfront for two units

✅ Utility controls batteries for peak shaving and demand response

✅ Enables backup power, solar readiness, and EV charging support

There are more than 100 million single-family homes in the United States of America. If each of these homes were to have two 13.5 kWh Tesla Powerwalls, that would total 2.7 Terawatt-hours worth of electricity stored. Prior research has suggested that this volume of energy storage could get us halfway to the 5.4 TWh of storage needed to let the nation get 80% of its electricity from solar and wind, as states like California increasingly turn to grid batteries to support the transition.

Vermont utility Green Mountain Power (GMP) seeks to remove standard electric utility metering hardware and replace it with the equipment inside of a Tesla Powerwall, as part of a broader digital grid evolution underway. Mary Powell, President and CEO of Green Mountain Power, says, “We have a vision of a battery system in every single home” and they’ve got a patent pending software solution to make it happen.

The Resilient Home program will install two standard Tesla Powerwalls each in 250 homes in GMP’s service area. The homeowner will pay either $30 a month for ten years ($3,600), or $3,000 up front. At the end of the ten year period, payments end, but the unit can stay in the home for an additional five years – or as long as it has a usable life.

A single Powerwall costs approximately $6,800, making this a major discount.

GMP notes that the home must have reliable internet access to allow GMP and Tesla to communicate with the Powerwall. GMP will control the functions of the Powerwall, effectively operating a virtual power plant across participating homes, expanding the scope of programs like those that saved the state’s ratepayers more than $500,000 during peak demand events last year. The utility specifically notes that customers agree to share stored energy with GMP on several peak demand days each year.

The hardware can be designed to interact with current backup generators during power outages, or emerging fuel cell solutions that maintain battery charge longer during extended outages, however, the units will not charge from the generator. As noted the utility will be making use of the hardware during normal operating times, however, during a power outage the private home owner will be able to use the electricity to back up both their house and top off their car.

The utility told pv magazine USA that the Powerwalls are standard from the factory, with GMP’s patent pending software solution being the special sauce (has a hint of recent UL certifications). GMP said the program will also get home owners “adoption ready” for solar power, including microgrid energy storage markets, and other smart devices.

Sonnen’s ecoLinx is already directly interacting with a home’s electrical panel (literally throwing wifi enabled circuit breakers). Now with Tesla Powerwalls being used to replace utility meters, we see one further layer of integration that will lead to design changes that will drive residential solar toward $1/W. Electric utilities are also experimenting with controlling module level electronics and smart solar inverters in 100% residential penetration situations. And of course, considering that California is requiring solar – and probably storage in the future – in all new homes, we should expect to see further experimentation in this model. Off grid solar inverter manufacturers already include electric panels with their offerings.

If we add in the electric car, and have vehicle-to-grid abilities, we start to see a very strong amount of electricity generation and energy storage, helping to keep the lights on during grid stress, potentially happening in more than 100 million residential power plants. Resilient homes indeed.

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