Tesla’s Powerwall as the beating heart of your home


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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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BC Hydro hoping to be able to charge customers time of use rates

BC Hydro Time-of-Use Rates propose off-peak credits and peak surcharges, with 5 cent/kWh differentials, encouraging demand shifting, EV charging at night, and smart meter adoption, pending BC Utilities Commission review in an optional opt-in program.

 

Key Points

Optional pricing that credits 5 cents/kWh off-peak and adds 5 cents/kWh during 4-9 p.m. peak to encourage load shifting.

✅ Off-peak credit: 11 p.m.-7 a.m., 5 cents/kWh savings

✅ Peak surcharge: 4-9 p.m., additional 5 cents/kWh

✅ Opt-in only; BCUC review; suits EV charging and flexible loads

 

BC Hydro is looking to charge customers less for electricity during off peak hours and more during the busiest times of the day, reflecting holiday electricity demand as well.

The BC Utilities Commission is currently reviewing the application that if approved would see customers receive a credit of 5 cents per kilowatt hour for electricity used from 11 p.m. to 7 a.m.

Customers would be charged an additional 5 cents per kWh for electricity used during the on-peak period from 4 p.m. to 9 p.m., and in Ontario, there were no peak-rate cuts for self-isolating customers during early pandemic response.

There would be no credit or additional charge will be applied to usage during the off-peak period from 7 a.m. to 4 p.m. and 9 p.m. to 11 p.m.

“We know the way our customers are using power is changing and they want more options,” BC Hydro spokesperson Susie Rieder said.

“It is optional and we know it may not work for everyone.”

For example, if a customer has an electric vehicle it will be cheaper to plug the car in after 9 p.m., similar to Ontario's ultra-low overnight plan offerings, rather than immediately after returning home from a standard work day.

If approved, the time of use rates would only apply to customers who opt in to the program, whereas Ontario provided electricity relief during COVID-19.

During the pandemic, Ontario extended off-peak electricity rates to help households and small businesses.

The regulatory review process is expected to take about one year.

Other jurisdictions, including Ontario's ultra-low overnight pricing, currently offer off peak rates. One of the challenges is that consumers change in hopes of altering their behaviour, but in reality, end up paying more.

“The cheapest electrical grid system is one with consistent demand and the issue of course is our consumption is not flat,” energyrates.ca founder Joel MacDonald said.

“There is a 5 cent reduction in off peak times, there is a 5 cent increase in peak times, you would have to switch 50 per cent of your load.”

 

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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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Power Outage Affects 13,000 in North Seattle

North Seattle Power Outage disrupts 13,000 in Ballard, Northgate, and Lake City as Seattle City Light crews repair equipment failures. Aging infrastructure, smart grid upgrades, microgrids, and emergency preparedness highlight resilience and reliability challenges.

 

Key Points

A major outage affecting 13,000 in North Seattle from equipment failures and aging grid, prompting repairs and planning.

✅ 13,000 customers in Ballard, Northgate, Lake City affected

✅ Cause: equipment failures and aging infrastructure

✅ Crews, smart grid upgrades, and preparedness improve resilience

 

On a recent Wednesday morning, a significant power outage struck a large area of North Seattle, affecting approximately 13,000 residents and businesses. This incident not only disrupted daily routines, as seen in a recent London outage, but also raised questions about infrastructure reliability and emergency preparedness in urban settings.

Overview of the Outage

The outage began around 9 a.m., with initial reports indicating that neighborhoods including Ballard, Northgate, and parts of Lake City were impacted. Utility company Seattle City Light quickly dispatched crews to identify the cause of the outage and restore power as soon as possible. By noon, the utility reported that repairs were underway, with crews working diligently to restore service to those affected.

Such outages can occur for various reasons, including severe weather, such as windstorm-related failures, equipment failure, or accidents involving utility poles. In this instance, the utility confirmed that a series of equipment failures contributed to the widespread disruption. The situation was exacerbated by the age of some infrastructure in the area, highlighting ongoing concerns about the need for modernization and upgrades.

Community Impact

The power outage caused significant disruptions for residents and local businesses. Many households faced challenges as their morning routines were interrupted—everything from preparing breakfast to working from home became more complicated without electricity. Schools in the affected areas also faced challenges, as some had to adjust their schedules and operations.

Local businesses, particularly those dependent on refrigeration and electronic payment systems, felt the immediate impact. Restaurants struggled to serve customers without power, while grocery stores dealt with potential food spoilage, leading to concerns about lost inventory and revenue. The outage underscored the vulnerability of businesses to infrastructure failures, as recent Toronto outages have shown, prompting discussions about contingency plans and backup systems.

Emergency Response

Seattle City Light’s swift response was crucial in minimizing the outage's impact. Utility crews worked through the day to restore power, and the company provided regular updates to the community, keeping residents informed about progress and estimated restoration times. This transparent communication was essential in alleviating some of the frustration among those affected, and contrasts with extended outages in Houston that heightened public concern.

Furthermore, the outage served as a reminder of the importance of emergency preparedness for both individuals and local governments, and of utility disaster planning that supports resilience. Many residents were left unprepared for an extended outage, prompting discussions about personal emergency kits, alternative power sources, and community resources available during such incidents. Local officials encouraged residents to stay informed about power outages and to have a plan in place for emergencies.

Broader Implications for Infrastructure

This incident highlights the broader challenges facing urban infrastructure. Many cities, including Seattle, are grappling with aging power grids that struggle to keep up with modern demands, and power failures can disrupt transit systems like the London Underground during peak hours. Experts suggest that regular assessments and updates to infrastructure are critical to ensuring reliability and resilience against both natural and human-made disruptions.

In response to increasing frequency and severity of power outages, including widespread windstorm outages in Quebec, there is a growing call for investment in modern technologies and infrastructure. Smart grid technology, for instance, can enhance monitoring and maintenance, allowing utilities to respond more effectively to outages. Additionally, renewable energy sources and microgrid systems could offer more resilience and reduce reliance on centralized power sources.

The recent power outage in North Seattle was a significant event that affected thousands of residents and businesses. While the immediate response by Seattle City Light was commendable, the incident raised important questions about infrastructure reliability and emergency preparedness. As cities continue to grow and evolve, the need for modernized power systems and improved contingency planning will be crucial to ensuring that communities can withstand future disruptions.

As residents reflect on this experience, it serves as a reminder of the interconnectedness of urban living and the critical importance of reliable infrastructure in maintaining daily life. With proactive measures, cities can work towards minimizing the impact of such outages and building a more resilient future for their communities.

 

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Illinois electric utility publishes online map of potential solar capacity

ComEd Hosting Capacity Map helps Illinois communities assess photovoltaic capacity, distributed energy resources, interconnection limits, and grid planning needs, guiding developers and policymakers on siting solar, net metering feasibility, and RPS-aligned deployment by circuit.

 

Key Points

An online tool showing circuit-level DER capacity, PV limits, and interconnection readiness across ComEd.

✅ Circuit-level estimates of solar hosting capacity

✅ Guides siting, interconnection, and net metering

✅ Supports RPS goals with grid planning insights

 

As the Illinois solar market grows from the Future Energy Jobs Act, the largest utility in the state has posted a planning tool to identify potential PV capacity in their service territory. ComEd, a Northern Illinois subsidiary of Exelon, has a hosting capacity website for its communities indicating how much photovoltaic capacity can be sited in given areas, based on the existing electrical infrastructure, as utilities pilot virtual power plant programs that leverage distributed resources.

According to ComEd’s description, “Hosting Capacity is an estimate of the amount of DER [distributed energy resources] that may be accommodated under current configurations at the overall circuit level without significant system upgrades to address adverse impacts to power quality or reliability.” This website will enable developers and local decision makers to estimate how much solar could be installed by township, sections and fractions of sections as small as ½ mile by ½ mile and to gauge EV charging impacts with NREL's projection tool for distribution planning. The map sections indicate potential capacity by AC kilowatts with a link to to ComEd’s recently upgraded Interconnection and Net Metering homepage.

The Hosting Map can provide insight into how much solar can be installed in which locations in order to help solar reach a significant portion of the Illinois Renewable Portfolio Standard (RPS) of 25% electricity from renewable sources by 2025, and to plan for transportation electrification as EV charging infrastructure scales across utility territories. For example, the 18 sections of Oak Park Township capacity range from 612 to 909 kW, and total 13,260 kW of photovoltaic power. That could potentially generate around 20 million kWh, and policy actions such as the CPUC-approved PG&E EV program illustrate how electrification initiatives may influence future demand. Oak Park, according to the PlanItGreen Report Card, a joint project of the Oak Park River Forest Community Foundation and Seven Generations Ahead, uses about 325 million kWh.

Based on ComEd’s Hosting Capacity, Oak Park could generate about 6% of its electricity from solar power located within its borders. Going significantly beyond this amount would likely require a combination of upgrades by ComEd’s infrastructure, potentially higher interconnection costs and deployment of technologies like energy storage solutions. What this does indicate is that a densely populated community like Oak Park would most likely have to get the majority of its solar and renewable electricity from outside its boundaries to reach the statewide RPS goal of 25%. The Hosting Capacity Map shows a considerable disparity among communities in ½ mile by ½ mile sections with some able to host only 100-200 kWs to some with capacities of over 3,000 kW.

 

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U.S. Nonprofit Invests $250M in Electric Trucks for California Ports

California Ports Electric Truck Leasing accelerates zero-emission logistics, cutting diesel pollution at Los Angeles and Long Beach. A $250 million nonprofit plan funds heavy-duty EVs and charging infrastructure to improve air quality and community health.

 

Key Points

A nonprofit's $250M plan to lease EV trucks at LA/Long Beach ports to cut diesel emissions and improve air quality.

✅ $250M lease program for heavy-duty EVs at LA/Long Beach ports

✅ Cuts diesel emissions; improves air quality in nearby communities

✅ Requires robust charging infrastructure and OEM partnerships

 

In a significant move towards sustainable transportation, a prominent U.S. nonprofit has announced plans to invest $250 million in leasing electric trucks for operations at California ports. This initiative aims to reduce air pollution and promote greener logistics, responding to the urgent need for environmentally friendly solutions in the transportation sector.

Addressing Environmental Concerns

California’s ports, particularly the Port of Los Angeles and the Port of Long Beach, are among the busiest in the United States. However, they also contribute significantly to air pollution due to the heavy reliance on diesel trucks for cargo transport. These ports are essential for the economy, facilitating trade and commerce, but the environmental toll is considerable. Diesel emissions are linked to respiratory issues and other health problems in nearby communities, which often bear the brunt of pollution.

The nonprofit's investment in electric trucks is a critical step towards mitigating these environmental challenges. By transitioning to electric vehicles (EVs), the project aims to significantly cut emissions from port operations, contributing to California's broader goals of reducing greenhouse gas emissions and improving air quality.

The Scale of the Initiative

This ambitious initiative involves leasing a fleet of electric trucks that will operate within the ports and surrounding areas. The $250 million investment is expected to facilitate the acquisition of hundreds of electric vehicles, which will replace conventional diesel trucks used for cargo transport. This fleet will help demonstrate the viability and effectiveness of electric trucks in heavy-duty applications, paving the way for broader adoption.

The plan includes partnerships with established electric truck manufacturers, such as the Volvo VNR Electric platform, and local logistics companies to ensure seamless integration of these vehicles into existing operations. By collaborating with industry leaders, the initiative seeks to establish a model that can be replicated in other major logistics hubs across the country.

Economic and Community Benefits

The introduction of electric trucks is expected to yield multiple benefits, not only in terms of environmental impact but also economically. As these trucks begin operations, and as other fleets adopt electric mail trucks, they will create jobs within the green technology sector, from manufacturing to maintenance and charging infrastructure development. The project is anticipated to stimulate local economies, providing new opportunities in communities that have historically been disadvantaged by pollution.

Moreover, the initiative is poised to enhance public health. By reducing diesel emissions, the nonprofit aims to improve air quality for residents living near the ports, and emerging research links EV adoption to fewer asthma-related ER visits in local communities. This could lead to decreased healthcare costs associated with pollution-related illnesses, benefiting both the community and the healthcare system.

Challenges Ahead

While the initiative is promising, challenges remain. The successful implementation of electric trucks at scale requires a robust charging infrastructure capable of supporting the significant power needs of a large fleet. Additionally, the transition from diesel to electric vehicles involves significant upfront costs, even with leasing arrangements. Ensuring that logistics companies can manage these costs effectively will be crucial for the project's success.

Furthermore, electric trucks currently face limitations in terms of range and payload capacity compared to their diesel counterparts. Continued advancements in battery technology and infrastructure development will be necessary to fully realize the potential of electric vehicles in heavy-duty applications.

The Bigger Picture

This investment in electric trucks aligns with broader national and global efforts to combat climate change. As governments and organizations commit to reducing carbon emissions, initiatives like this one represent crucial steps toward achieving sustainability goals, and ports worldwide are also piloting complementary technologies like hydrogen-powered cranes to decarbonize cargo handling.

California has set ambitious targets for reducing greenhouse gas emissions, including a mandate for all new trucks to be zero-emission by 2045. The nonprofit’s investment not only supports these goals, amid ongoing debates over funding priorities in the state, but also serves as a pilot program that could inform future policies and investments in clean transportation.

The $250 million investment in electric trucks for California ports marks a significant milestone in the push for sustainable transportation solutions. By addressing the urgent need for cleaner logistics, this initiative stands to benefit the environment, public health, and the economy. As the project unfolds, it will be closely watched as a potential model for similar efforts across the country and beyond, with developments such as the all-electric berth at London Gateway illustrating parallel advances, highlighting the critical intersection of innovation, sustainability, and community well-being in the modern logistics landscape.

 

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Electricity sales in the U.S. actually dropped over the past 7 years

US Electricity Sales Decline amid population growth and GDP gains, as DOE links reduced per capita consumption to energy efficiency, warmer winters, appliances, and bulbs, while hotter summers and rising AC demand may offset savings.

 

Key Points

US electricity sales fell 3% since 2010 despite population and GDP growth, driven by efficiency gains and warmer winters.

✅ DOE links drops to efficiency and warmer winters

✅ Per capita residential use fell about 7% since 2010

✅ Rising AC demand may offset winter heating savings

 

Since 2010, the United States has grown by 17 million people, and the gross domestic product (GDP) has increased by $3.6 trillion. Yet in that same time span, electricity sales in the United States actually declined by 3%, according to data released by the U.S. Department of Energy (DOE), even as electricity prices rose at a 41-year pace nationwide.

The U.S. decline in electricity sales is remarkable given that the U.S. population increased by 5.8% in that same time span. This means that per capita electricity use fell even more than that; indeed, the Department of Energy pegs residential electricity sales per capita as having declined by 7%, even as inflation-adjusted residential bills rose 5% in 2022 nationwide.

There are likely multiple reasons for this decline in electricity sales. Department of Energy analysts suggest that, at least in part, it is due to increased adoption of energy-efficient appliances and bulbs, like compact fluorescents. Indeed, the DOE notes that there is a correlation between consumer spending on “energy efficiency” and a reduction in per capita electricity sales, while utilities invest more in delivery infrastructure to modernize the grid.

Yet the DOE also notes that states with a greater increase in warm weather days had a corresponding decrease in electricity sales, as milder weather can reduce power demand across years. In southern states, the effect was most dramatic: for instance, from 2010 to 2016, Florida had a 56% decrease in cold weather days that would require heating and as a result, saw a 9% decrease in per capita electricity sales.

The moral is that warm winters save on electricity. But if global temperatures continue to rise, and summers become hotter, too, this decrease in winter heating spending may be offset by the increased need to run air conditioning in the summer, and given how electricity and natural gas prices interact, overall energy costs could shift. Indeed, it takes far more energy to cool a room than it does to heat it, for reasons related to the basic laws of thermodynamics. 

 

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