Climate, habits affect EV battery life

By San Jose Mercury News


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A variety of electric vehicles will hit the market this year, raising questions about the most critical element of any electric car: the battery.

How often do you have to replace the battery? Will it be recycled? Can you charge a battery even if it is not empty? How many charging cycles can the battery handle? Is it true there's a worldwide shortage of lithium?

Lithium-ion batteries can be found in all kinds of consumer products, from laptops to cell phones, and they also will be the power source in at least the first generation of electric cars. An electric-vehicle battery is basically just a cluster of thousands of cell phone batteries packaged together.

"If I want to buy an electric vehicle, I would want to know how many miles can I drive under real driving conditions, how long will my battery last and how long will the battery take to charge," said Venkat Srinivasan, a staff scientist at the Lawrence Berkeley National Laboratory in California.

The Chevrolet Volt and Nissan Leaf, the first mainstream plug-ins to reach the market, both offer battery warranties good for 100,000 miles or eight years. That will reassure many consumers, but there still are things they can do to maximize battery life and performance.

"Don't keep continuously fully charging and discharging them," Srinivasan said. "Pressing on the accelerator too much also draws power from the battery at a high rate, and can cause degradation."

Sunil M. Chhaya, an electric drive expert at the Electric Power Research Institute, notes that batteries age faster if the temperature of the battery is frequently elevated. The institute's research has found that heat management inside the batteries is the single most important predictor of battery health and longevity. That's one reason why Tesla uses a liquid cooling system to maximize the life of its battery packs.

"Batteries are like people and perform nicely when their operating temperature is in a 20-45 degrees Celsius or 68-113 degrees Fahrenheit window," Chhaya said. "Outside of it, they need to be 'thermally managed.'"

Even weather is a factor. In general, a cold battery exhibits higher resistance to current flow, meaning that the same amount of power at the wheels will produce much larger amounts of heat inside the battery due to internal power dissipation. This generates localized heat and, while it warms up the batteries, it also accelerates their aging process.

Consumers who live in colder climates are also likely to see reduced driving ranges because using the heater draws power - sometimes as much as 25 percent - from the battery.

And consumers eager to quickly charge a battery by using higher voltages need to be aware of the tradeoffs.

"Fast charging can degrade the battery life," said Mark Wagner, vice president of government relations at Johnson Controls, which manufactures lithium-ion batteries at its plant in Holland, Mich. "The vast majority of the vehicles will be charged up overnight at lower voltages, but if you charge very quickly, there can be mechanical stress on the battery."

But Mike Omotoso, an automotive analyst with J.D. Power and Associates, says there's no consensus about how much a battery is degraded by fast charging. And he notes that consumers rarely follow directions when it comes to battery use.

"If you think of your cell phone or laptop, you're supposed to charge the battery fully for 24 hours before using it the first time," Omotoso said. "But of course most of us are anxious to use something new right away, so we charge it for a couple of hours and then start using it. Then we complain that the battery life isn't as long as advertised."

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Australia PM rules out taxpayer funded power plants amid energy battle

ACCC energy underwriting guarantee proposes government-backed certainty for new generation, cutting electricity prices and supporting gas, pumped hydro, renewables, batteries, and potentially coal-fired power, addressing market failure without direct subsidies.

 

Key Points

A tech-neutral, government-backed plan underwriting new generation revenue to increase certainty and cut power prices.

✅ Government guarantee provides a revenue floor for new generators.

✅ Technology neutral: coal, gas, renewables, pumped hydro, batteries.

✅ Intended to reduce bills by up to $400 and address market failure.

 

Australian Taxpayers won't directly fund any new power plants despite some Coalition MPs seizing on a new report to call for a coal-fired power station.

The Australian Competition and Consumer Commission recommended the government give financial certainty to new power plants, guaranteeing energy will be bought at a cheap price if it can't be sold, as part of an electricity market plan to avoid threats to supply.

It's part of a bid to cut up to $400 a year from average household power prices.

Prime Minister Malcolm Turnbull said the finance proposal had merit, but he ruled out directly funding specific types of power generation.

"We are not in the business of subsidising one technology or another," he told reporters in Queensland today.

"We've done enough of that. Frankly, there's been too much of that."

Renewable subsidies, designed in the 1990s to make solar and wind technology more affordable, have worked and will end in 2020.

Some Coalition MPs claim the ACCC's recommendation to underwrite power generation is vindication for their push to build new coal-fired power plants.

But ACCC chair Rod Sims said no companies had proposed building new coal plants - instead they're trying to build new gas projects, pumped hydro or renewable projects.

Opposition Leader Bill Shorten said Mr Turnbull was offering solutions years away, having overseen a rise in power prices over the past year.

"You don't just go down to K-Mart and get a coal-fired power station off the shelf," Mr Shorten told reporters, admitting he had not read the ACCC report.

Energy Minister Josh Frydenberg said the recommendation to underwrite new power generators had a lot of merit, as it would address a market failure highlighted by AEMO warnings about reduced reserves.

"What they're saying is the government needs to step in here to provide some sort of assurance," Mr Frydenberg told 9NEWS today.

He said that could include coal, gas, renewable energy or battery storage.

Deputy Nationals leader Bridget McKenzie said science should determine which technology would get the best outcomes for power bills, with a scrapping coal report suggesting it can be costly.

Mr Turnbull said there was strong support for the vast majority of the ACCC's 56 recommendations, but the government would carefully consider the report, which sets out a blueprint to cut electricity bills by 25 percent.

Acting Greens leader Adam Bandt said Australia should exit coal-fired power in favour of renewable energy to cut pollution.

In contrast, Canada has seen the Stop the Shock campaign advocate a return to coal power in some provinces.

The Australian Energy Council, which represents 21 major energy companies, said the government should consult on changes to avoid "unintended consequences".

 

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Britain Prepares for High Winter Heating and Electricity Costs

UK Energy Price Cap drives household electricity bills and gas prices, as Ofgem adjusts unit rates amid natural gas shortages, Russia-Ukraine disruptions, inflation, recession risks, and limited storage; government support offers only short-term relief.

 

Key Points

The UK Energy Price Cap limits per-unit gas and electricity charges set by suppliers and adjusted by Ofgem.

✅ Reflects wholesale natural gas costs; varies quarterly

✅ Protects consumers from sudden electricity and heating bill spikes

✅ Does not cap total annual spend; usage still determines bills

 

The government organization that controls the cost of energy in Great Britain recently increased what is known as a price cap on household energy bills. The price cap is the highest amount that gas suppliers can charge for a unit of energy.

The new, higher cost has people concerned that they may not be able to pay for their gas and electricity this winter. Some might pay as much as $4,188 for energy next year. Earlier this year, the price cap was at $2,320, and a 16% decrease in bills is anticipated in April.

Why such a change?

Oil and gas prices around the world have been increasing since 2021 as economies started up again after the coronavirus pandemic. More business activities required more fuel.

Then, Russia invaded Ukraine in late February, creating a new energy crisis. Russia limited the amount of natural gas it sent to European countries that needed it to power factories, produce electricity and keep homes warm.

Some energy companies are charging more because they are worried that Russia might completely stop sending gas to European countries. And in Britain, prices are up because the country does not produce much gas or have a good way to store it. As a result, Britain must purchase gas often in a market where prices are high, and ministers have discussed ending the gas-electricity price link to ease bills.

Citibank, a U.S. financial company, believes the higher energy prices will cause inflation in Britain to reach 18 percent in 2023, while EU energy inflation has also been driven higher by energy costs this year. And the Bank of England says an economic slowdown known as a recession will start later this year.

Public health and private aid organizations worry that high energy prices will cause a “catastrophe” as Britons choose between keeping their homes warm and eating enough food.

What can government do?

As prices rise, the British government plans to give people between $450 and $1,400 to help pay for energy costs, while some British MPs push to further restrict the price charged for gas and electricity. But the help is seen by many as not enough.

If the government approves more money for fuel, it will probably not come until September, as the energy security bill moves toward becoming law. That is the time the Conservative Party will select a new leader to replace Prime Minister Boris Johnson.

The Labour Party says the government should increase the amount it provides for people to pay for fuel by raising taxes on energy companies. However, the two politicians who are trying to become the next Prime Minister do not seem to support that idea.

Giovanna Speciale leads an organization called the Southeast London Community Energy group. It helps people pay their bills. She said the money will help but it is only a short-term solution to a bigger problem with Britain’s energy system. Because the system is privately run, she said, “there’s very little that the government can do to intervene in this.”

Other European countries are seeing higher energy costs, but not as high, and at the EU level, gas price cap strategies have been outlined to tackle volatility. In France, gas prices are capped at 2021 levels. In Germany, prices are up by 38 percent since last year. However, the government is reducing some taxes, which will make it easier for the average person to buy gas. In Italy, prices are going up, but the government recently approved over $8 billion to help people pay their energy bills.
 

 

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Why the Texas Power Grid Is Facing Another Crisis

Texas Power Grid Reliability faces record peak demand as ERCOT balances renewable energy, wind and solar variability, gas-fired generation, demand response, and transmission limits to prevent blackouts during heat waves and extreme weather.

 

Key Points

Texas Power Grid Reliability is ERCOT's capacity to meet peak demand with diverse resources while limiting outages.

✅ Record heat drives peak demand across ERCOT.

✅ Variable wind/solar need firm, flexible capacity.

✅ Demand response and reserves reduce blackout risk.

 

The electric power grid in Texas, which collapsed dramatically during the 2021 winter storm across the state, is being tested again as the state suffers unusually hot summer weather. Demand for electricity has reached new records at a time of rapid change in the mix of power sources as wind and solar ramp up. That’s feeding a debate about the dependability of the state’s power. 

1. Why is the Texas grid under threat again? 

Already the biggest power user in the nation, electricity use in the second most-populous state surged to record levels during heat waves this summer. The jump in demand comes as the state becomes more dependent on intermittent renewable power sources, raising concerns among some critics that more reliance on wind and solar will leave the grid more vulnerable to disruption. Green sources will produce almost 40% of the power in Texas this year, US Energy Information Administration data show. While that trails California’s 52%, Texas is a bigger market. It’s already No. 1 in wind, making it the largest clean energy market in the US. 

2. How is Texas unique? 

The spirit of defiance of the Lone Star State extends to its power grid as well. The Electric Reliability Council of Texas, or Ercot as the grid operator is known, serves about 90% of the state’s electricity needs and has very few high-voltage transmission lines connecting to nearby grids. It’s a deliberate move to avoid federal oversight of the power market. That means Texas has to be mainly self-reliant and cannot depend on neighbors during extreme conditions. That vulnerability is a dramatic twist for a state that’s also the energy capital of the US, thanks to vast oil and natural gas producing fields. Favorable regulations are also driving a wind and solar boom in Texas. 

3. Why the worry? 

The summer of 2023 will mark the first time all of the state’s needs cannot be met by traditional power plants, like nuclear, coal and gas. A sign of potential trouble came on June 20 when state officials urged residents to conserve power because of low supplies from wind farms and unexpected closures of fossil-fuel generators amid supply-chain constraints that limited availability. As of late July, the grid was holding up, thanks to the help of renewable sources. Solar generation has been coming in close to expected summer capacity, or exceeding it on most days. This has helped offset the hours in the middle of the day when wind speeds died down in West Texas. 

4. Why didn’t the grid’s problems get fixed? 

There is no easy fix. The Texas system allows the price of electricity to swing to match supply and demand. That means high prices — and high profits — drive the development of new power plants. At times spot power prices have been as low as $20-$50 a megawatt-hour versus more than $4,000 during periods of stress. The limitation of this pricing structure was laid bare by the 2021 winter blackouts. Since then, state lawmakers have passed market reforms that require weatherization of critical infrastructure and changed rules to put more money in the pockets of the owners of power generation.  

5. What’s the big challenge? 

There’s a real clash going on over what the grid of the future should look like in Texas and across the country, especially as severe heat raises blackout risks nationally. The challenge is to make sure nuclear and fossil fuel plants that are needed right now don’t retire too early and still allow newer, cleaner technologies to flourish. Some conservative Republicans have blamed renewable energy for destabilizing the grid and have pushed for more fossil-fuel powered generators. Lawmakers passed a controversial $10 billion program providing low-interest loans and grants to build new gas-fired plants using taxpayer money, but Texans ultimately have to vote on the subsidy. 


6. Why do improvements take so long? 

Figuring out how to keep the lights on without overburdening consumers is becoming a greater challenge amid more extreme weather fueled by climate change. As such, changing the rules is often a hotly contested process pitting utilities, generators, manufacturers, electricity retailers and other groups against one another. The process became more politicized after the storm in 2021 with Republican Gov. Greg Abbott and lawmakers ordering Ercot to make changes. Building more transmission lines and connecting to other states can help, but such projects are typically tied up for years in red tape.

7. What can be done? 

The price cap for electricity was cut from $9,000/MWh to $5,000 to help avoid the punitive costs seen in the 2021 storm, though prices are allowed to spike more easily. Ercot is also contracting for more reserves to be online to help avoid supply shortfalls and improve reliability for customers, which added $1.7 billion in consumer costs alone last year. Another rule helps some gas generators pay for their fuel costs, while a more recent reform put in price floors when reserves fall to certain levels. Many power experts say that the easiest solution is to pay people to reduce their energy consumption during times of grid stress through so-called demand response programs. Factories, Bitcoin miners and other large users are already compensated to conserve during tight grid conditions.

 

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Announces Completion of $16 Million Project to Install Smart Energy-Saving Streetlights in Syracuse

Smart Street Lighting NY delivers Syracuse-wide LED retrofits with smart controls, Wi-Fi, and sensors, saving $3.3 million annually and cutting nearly 8,500 tons of greenhouse gases, improving energy efficiency, safety, and maintenance.

 

Key Points

A NYPA-backed program replacing streetlights with LED and controls to cut costs and emissions across New York by 2025.

✅ Syracuse replaced 17,500 fixtures with LED and smart controls.

✅ Saves $3.3M yearly; cuts 8,500 tons CO2e; improves safety.

✅ NYPA financing and maintenance support enable Smart City sensors.

 

Governor Andrew M. Cuomo today announced the completed installation of energy-efficient LED streetlights throughout the City of Syracuse as part of the Governor's Smart Street Lighting NY program. Syracuse, through a partnership with the New York Power Authority, replaced all of its streetlights with the most comprehensive set of innovative Smart City technologies in the state, saving the city $3.3 million annually and reducing greenhouse gas emissions by nearly 8,500 tons a year--the equivalent of taking more than 1,660 cars off the road. New York has now replaced more than 100,000 of its streetlights with LED fixtures, reflecting broader state renewable ambitions across the country, a significant milestone in the Governor's goal to replace at least 500,000 streetlights with LED technology by 2025 under Smart Street Lighting NY.

Today's announcement directly supports the goals of the Climate Leadership and Community Protection Act, the most aggressive climate change law in the nation, through the increased use of energy efficiency, exemplified by Seattle City Light's program that helps customers reduce bills, to annually reduce electricity demand by three percent--equivalent to 1.8 million New York households--by 2025.

"As we move further into the 21st century, it's critical we make the investments necessary for building smarter, more sustainable communities and that's exactly what we are doing in Syracuse," Governor Cuomo said. "Not only is the Smart Street Lighting NY program reducing the city's carbon footprint, but millions of taxpayer dollars will be saved thanks to a reduction in utility costs. Climate change is not going away and it is these types of smart, forward-thinking programs which will help communities build towards the future."

The more than $16 million cutting-edge initiative, implemented by NYPA, includes the replacement of approximately 17,500 streetlights throughout the city with SMART, LED fixtures, improving lighting quality and neighborhood safety while saving energy and maintenance costs. The city's streetlights are now outfitted with SMART controls that provide programmed dimming ability, energy metering, fault monitoring, and additional tools for emergency services through on-demand lighting levels.

"The completion of the replacement of LED streetlights in Syracuse is part of our overall efforts to upgrade more than 100,000 streetlights across the state," Lieutenant Governor Kathy Hochul said. "The new lights will save the city $3.3 million annually, helping to reduce cost for energy and maintenance and reducing greenhouse gas emissions. These new light fixtures will also help to improve safety and provide additional tools for emergency services. The conversion of streetlights statewide to high-tech LED fixtures will help local governments and taxpayers save money, while increasing efficiency and safety as we work to build back better and stronger for the future."

NYPA provided Syracuse with a $500,000 Smart Cities grant for the project. The city utilized the additional funding to support special features on the streetlights that demonstrate the latest in Smart City technologies, focused on digital connectivity, environmental monitoring and public safety. These features are expected to be fully implemented in early 2021.

Connectivity: The city is planning to deploy exterior Wi-Fi at community centers and public spaces, including in neighborhoods in need of expanded digital network services.

Environmental Monitoring: Ice and snow detection systems that assist city officials in pinpointing streets covered in ice or snow and require attention to prevent accidents and improve safety. The sensors provide data that can tell the city where salt trucks and plows are most needed instead of directing trucks to drive pre-determined routes. Flood reporting and monitoring systems will also be installed.

Public Safety and Property Protection: Illegal dumping and vandalism detection sensors will be installed at strategic locations to help mitigate these disturbances. Vacant house monitoring will also be deployed by the city. The system can monitor for potential fires, detect motion and provide temperature and humidity readings of vacant homes. Trash bin sensors will be installed at various locations throughout the city that will detect when a trash bin is full and alert local officials for pick-up.

NYPA President and CEO Gil C. Quiniones said, "Syracuse is truly a pioneer in its exploration of using SMART technologies to improve public services and the Power Authority was thrilled to partner with the city on this innovative initiative. Helping our customers bring their streetlights into the future further advances NYPA's reputation as a first-mover in the energy-sector."

New York State Public Service Commission Chair John B. Rhodes said, "Governor Cuomo signed legislation making it easier for municipalities to purchase and upgrade their street lighting systems. With smart projects like these, cities such as Syracuse can install state-of-the-art, energy efficient lights and take control over their energy use, lower costs to taxpayers and protect the environment."

Mayor Ben Walsh said, "Governor Cuomo and the New York Power Authority have helped power Syracuse to the front of the pack of cities in the U.S., leveraging SMART LED lighting to save money and make life better for our residents. Because of our progress, even in the midst of a global pandemic, the Syracuse Surge, our strategy for inclusive growth in the New Economy, continues to move forward. Syracuse and all of New York State are well positioned to lead the nation and the world because of NYPA's support and the Governor's leadership."

To date, NYPA has installed more than 50,000 LED streetlights statewide, with more than 115,000 lighting replacements currently implemented. Some of the cities and towns that have already converted to LED lights, in collaboration with NYPA, include Albany, Rochester, and White Plains. In addition, the Public Service Commission, whose ongoing retail energy markets review informs consumer protections, in conjunction with investor-owned utilities around the state, has facilitated the installation of more than 50,000 additional LED lights.

The NYPA Board of Trustees, in support of the Smart Street Lighting NY program, authorized at its September meeting the expenditure of $150 million over the next five years to secure the services of Candela Systems in Hawthorne, D&M Contracting in Elmsford and E-J Electric T&D in Wallingford, Connecticut, while in other regions, city officials take a clean energy message to Georgia Power and the PSC to spur utility action. All three firms will work on behalf of NYPA to continue to implement LED lighting replacements throughout New York State to meet the Governor's goal of 500,000 LED streetlights installed by 2025.

Smart Street Lighting NY: Energy Efficient and Economically Advantageous

NYPA is working with cities, towns, villages and counties throughout New York to fully manage and implement a customer's transition to LED streetlight technology. NYPA provides upfront financing for the project, and during emergencies, New York's utility disconnection moratorium helps protect customers while payments to NYPA are made in the years following from the cost-savings created by the reduced energy use of the LED streetlights, which are 50 to 65 percent more efficient than alternative street lighting options.

Through this statewide street lighting program, NYPA's government customers are provided a wide-array of lighting options to help meet their individual needs, including specifications on the lights to incorporate SMART technology, which can be used for dozens of other functions, such as cameras and other safety features, weather sensors, Wi-Fi and energy meters.

To further advance the Governor's effort to replace existing New York street lighting, in 2019, NYPA launched a new maintenance service to provide routine and on-call maintenance services for LED street lighting fixtures installed by NYPA throughout the state, and during the COVID-19 response, New York and New Jersey suspended utility shut-offs to protect customers and maintain essential services. The new service is available to municipalities that have engaged NYPA to implement a LED street lighting conversion and have elected to install an asset management controls system on their street lighting system, reducing the number of failures and repairs needed after installation is complete.

To learn more about the Smart Street Lighting NY program, visit the program webpage on NYPA's website.

 

New York State's Nation-Leading Climate Plan

Governor Cuomo's nation-leading climate plan is the most aggressive climate and clean energy initiative in the nation, calling for an orderly and just transition to clean energy that creates jobs and continues fostering a green economy as New York State builds back better as it recovers from the COVID-19 pandemic. Enshrined into law through the CLCPA, New York is on a path to reach its mandated goals of economy wide carbon neutrality and achieving a zero-carbon emissions electricity sector by 2040, similar to Ontario's clean electricity regulations that advance decarbonization, faster than any other state. It builds on New York's unprecedented ramp-up of clean energy including a $3.9 billion investment in 67 large-scale renewable projects across the state, the creation of more than 150,000 jobs in New York's clean energy sector, a commitment to develop over 9,000 megawatts of offshore wind by 2035, and 1,800 percent growth in the distributed solar sector since 2011. New York's Climate Action Council is working on a scoping plan to build on this progress and reduce greenhouse gas emissions by 85 percent from 1990 levels by 2050, while ensuring that at least 40 percent of the benefits of clean energy investments benefit disadvantaged communities, and advancing progress towards the state's 2025 energy efficiency target of reducing on-site energy consumption by 185 TBtus.

 

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Californians Learning That Solar Panels Don't Work in Blackouts

Rooftop Solar Battery Backup helps Californians keep lights on during PG&E blackouts, combining home energy storage with grid-tied systems for wildfire prevention, outage resilience, and backup power when solar panels cannot supply nighttime demand.

 

Key Points

A home battery paired with rooftop solar, providing backup power and blackout resilience when the grid is down.

✅ Works when grid is down; panels alone stop for safety.

✅ Requires home battery storage; market adoption is growing.

✅ Supports wildfire mitigation and PG&E outage preparedness.

 

Californians have embraced rooftop solar panels more than anyone in the U.S., but amid California's solar boom many are learning the hard way the systems won’t keep the lights on during blackouts.

That’s because most panels are designed to supply power to the grid -- not directly to houses, though emerging peer-to-peer energy models may change how neighbors share power in coming years. During the heat of the day, solar systems can crank out more juice than a home can handle, a challenge also seen in excess solar risks in Australia today. Conversely, they don’t produce power at all at night. So systems are tied into the grid, and the vast majority aren’t working this week as PG&E Corp. cuts power to much of Northern California to prevent wildfires, even as wildfire smoke can dampen solar output during such events.

The only way for most solar panels to work during a blackout is pairing them with solar batteries that store excess energy. That market is just starting to take off. Sunrun Inc., the largest U.S. rooftop solar company, said some of its customers are making it through the blackouts with batteries, but it’s a tiny group -- countable in the hundreds.

“It’s the perfect combination for getting through these shutdowns,” Sunrun Chairman Ed Fenster said in an interview. He expects battery sales to boom in the wake of the outages, as the state has at times reached a near-100% renewables mark that heightens the need for storage.

And no, trying to run appliances off the power in a Tesla Inc. electric car won’t work, at least without special equipment, and widespread U.S. power-outage risks are a reminder to plan for home backup.

 

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Washington County planning officials develop proposed recommendations for solar farms

Washington County solar farm incentives aim to steer projects to industrial sites with tax breaks, underground grid connections, decommissioning bonds, and wildlife corridors, balancing zoning, historic preservation, and Maryland renewable energy mandates.

 

Key Points

Policies steer solar to industrial sites with tax breaks, buried lines, and bonds, aligning with zoning and state goals.

✅ Tax breaks to favor rooftops and parking canopies

✅ Bury new grid lines to shift projects to industrial parks

✅ Require decommissioning bonds and wildlife corridors

 

Incentives for establishing solar farms at industrial spaces instead of on prime farmland are among the ideas the Washington County Planning Commission is recommending for the county to update its policies regarding solar farms.

Potential incentives would include tax breaks on solar equipment and requiring developers to put power-grid connections and line extensions underground, a move tied to grid upgrade cost debates in other regions, Planning Commission members said during a Monday meeting.

The tax break could make it more attractive for a developer to put a solar farm on a roof or over a parking lot, similar to California's building-solar requirement policies that favor rooftop generation, which could cost more than putting it on farmland, said Commission member Dave Kline, who works for FirstEnergy.

Requiring a company to bury new transmission lines could steer them to industrial or business parks where, theoretically, transmission lines are more readily available, Kline said Wednesday in a phone interview.

Chairman Clint Wiley suggested talking to industrial property owners to create a list of industrial sites that make sense for a solar site, which could generate extra income for the property owner.

Commission members also talked about requiring a wildlife corridor. Anne Arundel County requires such a corridor if a solar site is over 15 acres, according to Jill Baker, deputy director of planning and zoning. The solar site is broken into sections so animals such as deer can get through, she said.

However, that means the solar farm would take up more agricultural land, Commission member Jeremiah Weddle said. Weddle, a farmer, has repeatedly voiced concerns about solar farms using prime farmland.

County zoning law already states solar farms are prohibited in Rural Legacy Areas, Priority Preservation Areas, and within Antietam Overlay zones that preserve the Antietam National Battlefield viewshed. They also cannot be built on land with permanent preservation easements, Baker said.

However, a big reason county officials are looking to strengthen county policies for solar generating systems, or solar farms, is a recent court decision that ruled the Maryland Public Service Commission can preempt county zoning law when it comes to large solar farms.

County zoning law defines a solar energy generating system as a solar facility, with multiple solar arrays, tied into the power grid and whose primary purpose is to generate power to distribute and/or sell into the public utility grid rather than consuming that power on site.

The Maryland Court of Appeals ruled in July that the Public Service Commission can preempt local zoning regarding solar farms larger than 2 megawatts. But the ruling also stated local government is a "significant participant in the process" and the state commission must give "due consideration" to local zoning laws.

County officials are looking at recommendations for solar farms, whether they are over 2 megawatts or not.

Solar farms are a popular issue statewide, especially with Maryland solar subscriptions expanding, and were discussed at a recent Maryland Association of Counties meeting for planners, Planning and Zoning Director Stephen Goodrich said.

The thinking is the best way for counties to express their opinions about a solar project is to participate in the state commission's local public hearings, where issues like how solar owners are paid often arise, Goodrich said. Another popular idea is for the county to continue to follow its process, which requires a public hearing for a special exception to establish a solar farm. That will help the county form an opinion, on individual cases, to offer the state commission, he said.

Recommendations discussed by the Planning Commission include:

A break on personal property taxes, which is on equipment, including affordable battery storage that can firm output, to steer developers away from areas where the county doesn't want solar farms. The Board of County Commissioners have been split on tax-break agreements for solar farms, with a majority recently granting a few.

 

Protecting valuable historic sites.

Requiring a decommissioning bond for removing the equipment at the end of the solar farm's life. The bond is protection in case the company goes bankrupt. The county commissioners have been making such a bond a requirement when granting recent tax breaks.

Looking at allowing solar farms in stormwater-management areas.

Other counties, particularly in Western Maryland and on the Eastern Shore, are having issues with solar farms even as research to improve solar and wind advances, because land is cheaper and there are wide-open spaces, Goodrich said.

Many solar projects are being developed or proposed because state lawmakers passed legislation requiring 50% of electricity produced in the state to come from renewable sources by 2030, and a federal plan to expand solar is also shaping expectations. Of that 50%, 14.5% is to come from solar energy.

In Maryland, the average number of homes that can be powered by 1 megawatt of solar energy is about 110, according to the Solar Energy Industries Association's website.

 

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