Court Sees If Church Solar Panels Break Electricity Monopoly


solar panels on church roof

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NC WARN Solar Case tests third-party solar rights as North Carolina Supreme Court reviews Utilities Commission fines over a Greensboro church's rooftop power deal, challenging Duke Energy's monopoly, onsite electricity sales, and potential rate impacts.

 

Key Points

A North Carolina Supreme Court test of third-party solar could weaken Duke Energy's monopoly and change utility rules.

✅ NC Supreme Court weighs Utilities Commission penalty on NC WARN

✅ Case could permit onsite third-party solar sales statewide

✅ Outcome may pressure Duke Energy's monopoly and rates

 

North Carolina's highest court is taking up a case that could force new competition on the state's electricity monopolies.

The state Supreme Court on Tuesday will consider the Utilities Commission's decision to fine clean-energy advocacy group NC WARN for putting solar panels on a Greensboro church's rooftop and then charging it below-market rates for power.

The commission told NC WARN that it was producing electricity illegally and fined the group $60,000. The group said it was acting privately and appealed to the high court.

If the group prevails, it could put new pressure on Duke Energy's monopoly, which has seen an oversubscribed solar solicitation in recent procurements. State regulators say a ruling for NC WARN would allow companies to install solar equipment and sell power on site, shaving away customers and forcing Duke Energy to raise rates on everyone else.

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That's because if NC WARN's deal with Faith Community Church is allowed, the precedent could open the door for others to lure away from Duke Energy, as debates over how solar owners are paid continue, "the customers with the highest profit potential, such as commercial and industrial customers with large energy needs and ample rooftop space," attorney Robert Josey Jr. wrote in a court filing.

Losing those power sales would force the country's No. 2 electricity company to make it up by charging remaining customers more to cover the cost of all of its power plants, transmission lines and repair crews, a dynamic echoed in New England's grid upgrade debates as solar grows, wrote Josey, an attorney for the Public Staff, the state's official utilities consumer advocate.

The dispute is whether NC WARN is producing electricity "for the public," which would mean it's intruding on the territory of the publicly regulated monopoly utility, or whether the move was allowed because it was a private power deal with the church alone.

 

NC WARN installed the church's power panels in 2015 as part of what it described as a test case, amid wider debates like Nova Scotia's delayed solar charge for customers, challenging Duke Energy's monopoly position to generate and sell electricity.

North Carolina was one of nine states that as of last year explicitly disallowed residential customers from buying electricity generated by solar panels on their roof from a third party that owns the system, even as Maryland opens solar subscriptions more broadly, according to the North Carolina Clean Energy Technology Center. State law allows purchased or leased solar panels, but not payments simply for the power they generate.

NC WARN's goals included "reducing the effects of Duke Energy's monopoly control that has such negative impacts on power bills, clean air and water, and climate change," the church's pastor, Rev. Nelson Johnson, said in a statement the same day the clean-energy group asked state regulators to clear the plan.

Instead, the North Carolina Utilities Commission ruled the arrangement violated the state's system of legal electricity monopolies and hit the group with nearly $60,000 in fines, which would be suspended if the church's payments were refunded with interest and the solar equipment donated. The group has set aside the money and will donate the gear if it loses the Supreme Court case, NC WARN Executive Director Jim Warren said.

NC WARN's three-year agreement saw the group mount a rooftop solar array for which the church would pay about half the average retail electricity price, state officials said. The agreement states plainly that it is not a contract for the sale or lease of the $20,000 solar system, the church never owns the panels, and the low electricity price means its payback for the equipment would take 60 years, Josey wrote.

"Clearly, the only thing of value (the church) is obtaining for its payments under this agreement is the electricity created," he wrote.

In court filings, the group's attorneys have stuck to the argument that NC WARN isn't selling to the public because the deal involved a single customer only.

The deal "is not open to any other member of the public ... A private, bargained-for contract under which only one party receives electricity is not a sale of electricity 'to or for the public,' " attorney Matthew Quinn wrote to the court.

 

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Electric cars won't solve our pollution problems – Britain needs a total transport rethink

UK Transport Policy Overhaul signals bans on petrol and diesel cars, rail franchising reform, 15-minute cities, and active travel, tackling congestion, emissions, microplastics, urban sprawl, and public health with systemic, multimodal planning.

 

Key Points

A shift toward EVs, rail reform, and 15-minute cities to reduce emissions, congestion, and health risks.

✅ Phase-out of petrol and diesel car sales by 2030

✅ National rail franchising replaced with integrated operations

✅ Urban design: 15-minute cities, cycling, and active travel

 

Could it be true? That this government will bring all sales of petrol and diesel cars to an end by 2030, even as a 2035 EV mandate in Canada is derided by critics? That it will cancel all rail franchises and replace them with a system that might actually work? Could the UK, for the first time since the internal combustion engine was invented, really be contemplating a rational transport policy? Hold your horses.

Before deconstructing it, let’s mark this moment. Both announcements might be a decade or two overdue, but we should bank them as they’re essential steps towards a habitable nation.

We don’t yet know exactly what they mean, as the government has delayed its full transport announcement until later this autumn. But so far, nothing that surrounds these positive proposals makes any sense, and the so-called EV revolution often proves illusory in practice.

If the government has a vision for transport, it appears to be plug and play. We’ll keep our existing transport system, but change the kinds of vehicles and train companies that use it. But when you have a system in which structural failure is embedded, nothing short of structural change will significantly improve it.

A switch to electric cars will reduce pollution, though the benefits depend on the power mix; in Canada, Canada’s grid was 18% fossil-fuelled in 2019, for example. It won’t eliminate it, as a high proportion of the microscopic particles thrown into the air by cars, which are highly damaging to our health, arise from tyres grating on the surface of the road. Tyre wear is also by far the biggest source of microplastics pouring into our rivers and the sea. And when tyres, regardless of the engine that moves them, come to the end of their lives, we still have no means of properly recycling them.

Cars are an environmental hazard long before they leave the showroom. One estimate suggests that the carbon emissions produced in building each one equate to driving it for 150,000km. The rise in electric vehicle sales has created a rush for minerals such as lithium and copper, with devastating impacts on beautiful places. If the aim is greatly to reduce the number of vehicles on the road, and replace those that remain with battery-operated models, alongside EV battery recycling efforts, then they will be part of the solution. But if, as a forecast by the National Grid proposes, the current fleet is replaced by 35m electric cars, a University of Toronto study warns they are not a silver bullet, and we’ll simply create another environmental disaster.

Switching power sources does nothing to address the vast amount of space the car demands, which could otherwise be used for greens, parks, playgrounds and homes. It doesn’t stop cars from carving up community and turning streets into thoroughfares and outdoor life into a mortal hazard. Electric vehicles don’t solve congestion, or the extreme lack of physical activity that contributes to our poor health.

So far, the government seems to have no interest in systemic change. It still plans to spend £27bn on building even more roads, presumably to accommodate all those new electric cars. An analysis by Transport for Quality of Life suggests that this road-building will cancel out 80% of the carbon savings from a switch to electric over the next 12 years. But everywhere, even in the government’s feted garden villages and garden towns, new developments are being built around the car.

Rail policy is just as irrational, even though lessons from large electric bus fleets offer cleaner mass transit options. The construction of HS2, now projected to cost £106bn, has accelerated in the past few months, destroying precious wild places along the way, though its weak business case has almost certainly been destroyed by coronavirus.

If one thing changes permanently as a result of the pandemic, it is likely to be travel. Many people will never return to the office. The great potential of remote technologies, so long untapped, is at last being realised. Having experienced quieter cities with cleaner air, few people wish to return to the filthy past.

Like several of the world’s major cities, our capital is being remodelled in response, though why electric buses haven’t taken over remains a live question. The London mayor – recognising that, while fewer passengers can use public transport, a switch to cars would cause gridlock and lethal pollution – has set aside road space for cycling and walking. Greater Manchester hopes to build 1,800 miles of protected pedestrian and bicycle routes.

Cycling to work is described by some doctors as “the miracle pill”, massively reducing the chances of early death: if you want to save the NHS, get on your bike. But support from central government is weak and contradictory, and involves a fraction of the money it is spending on new roads. The major impediment to a cycling revolution is the danger of being hit by a car.

Even a switch to bicycles (including electric bikes and scooters) is only part of the answer. Fundamentally, this is not a vehicle problem but an urban design problem. Or rather, it is an urban design problem created by our favoured vehicle. Cars have made everything bigger and further away. Paris, under its mayor Anne Hidalgo, is seeking to reverse this trend, by creating a “15-minute city”, in which districts that have been treated by transport planners as mere portals to somewhere else become self-sufficient communities – each with their own shops, parks, schools and workplaces, within a 15-minute walk of everyone’s home.

This, I believe, is the radical shift that all towns and cities need. It would transform our sense of belonging, our community life, our health and our prospects of local employment, while greatly reducing pollution, noise and danger. Transport has always been about much more than transport. The way we travel helps to determine the way we live. And at the moment, locked in our metal boxes, we do not live well.

 

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Asset Management Firm to Finance Clean Coal Technologies Inc.

Clean Coal Technologies Pristine Funding secures investment from a New York asset manager via Black Diamond, advancing commercialization, Tulsa testing, Wyoming relocation, PRB coal enhancement, and cleaner energy innovation to support global coal exports.

 

Key Points

Capital from a New York asset manager backs Pristine commercialization, testing, and Wyoming relocation to boost PRB coal.

✅ Investment via Black Diamond funds Tulsa test operations.

✅ Permanent relocation planned near a Wyoming mine site.

✅ First Pristine M module to enhance PRB coal quality.

 

Clean Coal Technologies, Inc., an emerging cleaner-energy company utilizing patented and proven technology to convert untreated coal into a cleaner burning and more efficient fuel, announced today that the company has secured funding for their Pristine technology through commercialization, a move reminiscent of Bruce C project funding activity, from a major New York-based Asset Management company. This investment will be made through Black Diamond with all funds earmarked for test procedures at the plant near Tulsa, OK, at a time when rare new coal plants are appearing, and the plant's move to a permanent location in Wyoming. The first tranche is being paid immediately.

"Securing this investment will confidently carry us through to the construction of our first commercial module enabling management to focus on the additional tests that have been requested from multiple parties, even as US coal demand faces headwinds across the market," stated CEO of Clean Coal Technologies, Inc., Robin Eves. "At this time we have begun scheduling plant visits with both US government agency and coal industry officials along with key international energy consortiums that are monitoring transitions such as Alberta's coal phaseout policies."

"We're now able to finalize our negotiations in Wyoming where the permitting process has begun and where we will permanently relocate the test facility later this year following completion of the aforementioned tests," added CCTI COO/CFO, Aiden Neary. "This event also paves the way forward to commence the process of constructing the first commercial Pristine M facility. That plant is planned to be in Wyoming near an operating mine where our process can be used to enhance the quality of PRB coal to make it more competitive globally, even as regions like western Europe see coal-to-renewables conversions at legacy plants, and help restore the US coal export market."

 

 

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AZ goes EV: Rate of electric car ownership relatively high in Arizona

Arizona Electric Vehicle Ownership is surging, led by EV adoption, charging stations growth, state incentives, and local manufacturers; yet rural infrastructure gaps and limited fast-charging plugs remain key barriers to convenient, statewide electrification.

 

Key Points

Arizona Electric Vehicle Ownership shows rising EV adoption and incentives, but rural fast-charging access still lags.

✅ 28,770 EVs registered; sixth per 1,000 residents statewide

✅ 385 fast chargers; 1,448 Level 2 plugs; many not 24/7

✅ Incentives: lower registration, HOV access, utility rebates

 

For a mostly red state, Arizona has a lot of blue-state company when it comes to states ranked by electric vehicle ownership, according to recent government data.

Arizona had 28,770 registered electric vehicles as of June, according to the U.S. Department of Energy's Alternative Fuels Data Center, the seventh-highest number among states. When ownership is measured per 1,000 residents, Arizona inches up a notch to sixth place, with just over four electric vehicles per 1,000 people.

That rate put Arizona just behind Oregon and Colorado and just ahead of Nevada and Vermont. California was in the lead by far, with California's EV and charging lead reflected in 425,300 registered electric vehicles, or one for every 10.7 residents.

Arizona EV enthusiasts welcomed the ranking, which they said they have seen reflected in steady increases in group membership, but said the state can do better, even amid soaring U.S. EV sales this year.

"Arizona is growing by leaps and bounds in major areas, but still struggling out there in the hinterlands," said Jerry Asher, vice president of the Tucson Electric Vehicle Association.

He and others said the biggest challenge in Arizona, as in much of the country, is the lack of readily available charging stations for electric vehicles.

Currently, there are 385 public fast-charging plugs and 1,448 non-fast-charging plugs in the state, where charging networks compete to expand access, said Diane Brown, executive director with the Arizona Public Interest Research Group Education Fund. And many of those "are not available 24 hours a day, often making EV charging less convenient to the public," she said.

And in order for the state to hit 10% EV ownership by 2030, one scenario outlined by Arizona PIRG, the number of charging stations would need to grow significantly.

"According to the Arizona PIRG Education Fund, to support a future in which 10% of Arizona's vehicles are EVs – a conservative target for 2030 – Arizona will need more than 1,098 fast-charging plugs and 14,888 Level 2 plugs," Brown said.

This will require local, state and federal policies, as EVs challenge state power grids, to make "EV charging accessible, affordable, and easy," she said.

But advocates said there are several things working in their favor, even as an EV boom tests charging capacity across the country today. Jim Stack, president of the Phoenix Electric Auto Association, said many of the current plug-ins charging stations are at stores and libraries, places "where you would stop anyway."

"We have a good charging infrastructure and it keeps getting better," Stack said.

One way Asher said Arizona could be more EV-friendly would be to add charging stations at hotels, RV parks and shopping centers. In Tucson, he said, the Culinary Dropout and Jersey Mike's restaurants have already begun offering free electric vehicle charging to customers, Asher said.

While they push for more charging infrastructure, advocates said improving technology and lower vehicle expenses are on their side, as post-2021 electricity trends reshape costs, helping to sway more Arizonans to purchase an electric vehicle in recent years.

"The batteries are getting better and lower in cost as well as longer-lasting," Stack said. He said an EV uses about 50 cents of electricity to cover the same number of miles a gas-burning car gets from a gallon of gas – currently selling for $3.12 a gallon in Arizona, according to AAA.

In addition, the state is offering incentives to electric vehicle buyers.

"In AZ we get reduced registration on electric vehicles," Stack said. "It's about $15 a year compared to $300-700 a year for gas and diesel cars."

Electric vehicle owners also "get 24/7 access to HOV lanes, even with one person," he said. And utilities like Tucson Electric Power offer rebates and incentives for home charging stations, according to a report by the National Conference of State Legislatures, and neighboring New Mexico's EV benefits underscore potential economic gains for the region.

Stack also noted that Arizona is now home to three eclectic vehicle manufacturers: Lucid, which makes cars in Casa Grande, Nikola, which makes trucks in Phoenix and Coolidge, and Electra Meccanica, which plans to build the three-wheeled SOLO commuter in Mesa.

"We get clear skies. No oil changes, no muffler work, no transmission, faster acceleration. No smog or smog tests," Stack said. "It's priceless."

 

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Is it finally time to buy an electric car?

Electric Vehicles deliver longer range, faster charging, and broader price options, with incentives and lease deals reducing costs; evaluate performance, home charging, road trip needs, and vehicle types like SUVs, pickups, and vans.

 

Key Points

Electric vehicles are battery-powered cars that cut costs, boost performance, and charge at home or at fast stations.

✅ Longer range and faster charging reduce range anxiety

✅ Lower operating costs vs gas: fuel, maintenance, incentives

✅ Home Level 2 charging recommended; plan for road trips

 

Electric cars now drive farther, charge faster and come in nearly every price range. But when GMC began promoting its Hummer EV pickup truck to be released this year, it became even clearer that electric cars are primed to go mainstream for many buyers.

Once the domain of environmentalists, then early adopters, electric vehicles may soon have even truck bros kicking the gasoline habit, though sales are still behind gas cars in many markets.

With many models now available or coming soon — and arriving ahead of schedule for several automakers — including a knockoff of the lovable Volkswagen Microbus — you may be wondering if it’s finally time to buy or lease one.

Here are the essential questions to answer before you do.

(Full disclosure: I’m a convert myself after six years and 70,000 gas-free miles.)


1. Can you afford an electric car?
Electric vehicles tend to be pricy to buy but can be more affordable to lease. Finding federal, state and local government incentives can also reduce sticker shock. And, even if the monthly payment is higher than a comparable gas car, operating costs are lower.

Gas vehicles cost an average of $3,356 per year to fuel, tax and insure, while electric cost just $2,722, according to a study by Self Financial, and Consumer Reports finds EVs save money in the long run too. Find out how much you can save with the Department of Energy calculator.

 

2. How far do you need to drive on a single charge?
Although almost 60 percent of all car trips in America were less than 6 miles in 2017, according to the Department of Energy, the phrase “range anxiety” scared many would-be early adopters.

Teslas became popular in part because they offered 250 miles of range. But the range of many electric vehicles between charges is now over 200 miles; even the modestly priced Chevrolet Bolt can travel 259 miles on a single charge.

Still, electric vehicles have a “road trip problem,” according to Josh Sadlier, director of content strategy for car site Edmunds.com. “If you like road trips, you almost have to have two cars — one for around town and one for longer trips,” he says.

 

3. Where will you charge it?
If you live in an apartment without a charging station, this could be a deal breaker.

The number of public chargers increased by 60 percent worldwide in 2019, according to the International Energy Agency. While these stations — some of which are free — are more available, most electric vehicle owners install a home station for faster charging.

Electric vehicles can be charged by plugging into a common 120-volt household outlet, but it’s slow, and understanding charging costs can help you plan home use. To speed up charging, many electric vehicle owners wind up buying a 240-volt charging station and having an electrician install it for a total cost of $1,200, according to the home remodeling website Fixr.

4. What will you use the car for?
While there are a few luxury electric SUVs on the market, most electric vehicles are smaller sedans or hatchbacks with limited cargo capacity. However, the coming wave of electric cars are more versatile, and many experts expect that within a decade these options will be commonplace, including vans, such as the Microbus, and trucks, such as an electric version of the popular Ford F-150 pickup.

5. Do you enjoy performance?
This is where electric vehicles really shine. According to automotive experts, electric cars beat their gas counterparts in these ways:

Immediate response with great low-end acceleration, particularly in the 0-30 mph range.
Sure-footed handling due to the heavy battery mounted under the car, giving it a low center of gravity.
No “shift shock” from changing gears in a conventional gas car’s transmission.
Little noise except from the wind and tires.

 

Other factors
Once you consider the big questions, here are other reasons to make an electric car your next choice:

Reduced environmental guilt. There is a persistent myth that electric vehicles simply move the emissions from the tailpipe to the power generating station. Yes, producing electricity produces emissions, but many electric vehicle owners charge at night when much of the electricity would otherwise be unused. According to research published by the BBC and evidence that they are better for the planet in many scenarios electric cars reduce emissions by an average of 70 percent, depending on where people live.

Less time refueling. It takes only seconds to plug in at home, and the electric vehicle will recharge while you’re doing other things. No more searching for gas stations and standing by as your tank gulps down gasoline.

No oil changes. Dealers like a constant stream of drivers coming in for oil changes so they can upsell other services. Electric vehicles have fewer moving parts and require fewer trips to the dealership for maintenance.

Carpool lanes and other perks. Check your state regulations to see if an electric vehicle gets you access to the carpool lane, free parking or other special advantages.

Enjoy the technology. Yes, electric vehicles are more expensive, but they also tend to offer top-of-the-line comfort, safety features and technology compared with their gas counterparts.

 

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Electric Cars 101: How EV Motors Work, Tech Differences, and More

Electric Car Motors convert electricity to torque via rotor-stator magnetic fields, using AC/DC inverters, permanent magnets or induction designs; they power EV powertrains efficiently and enable regenerative braking for energy recovery and control.

 

Key Points

Electric car motors turn electrical energy into wheel torque using rotor-stator fields, inverters, and AC or DC control.

✅ AC induction, PMSM, BLDC, and reluctance architectures explained

✅ Inverters manage AC/DC, voltage, and motor speed via frequency

✅ Regenerative braking recovers energy and reduces wear

 

When was the last time you stopped to think about how electric cars actually work, especially if you're wondering whether to buy an electric car today? We superfans of the car biz have mostly developed a reasonable understanding of how combustion powertrains work. Most of us can visualize fuel and air entering a combustion chamber, exploding, pushing a piston down, and rotating a crankshaft that ultimately turns the wheels. We generally understand the differences between inline, flat, vee-shaped, and maybe even Wankel rotary combustion engines.

Mechanical engineering concepts such as these are comparatively easy to comprehend. But it's probably a fair bet to wager that only a minority of folks reading this can explain on a bar napkin exactly how invisible electrons turn a car's wheels or how a permanent-magnet motor differs from an AC induction one. Electrical engineering can seem like black magic and witchcraft to car nuts, so it's time to demystify this bold new world of electromobility, with the age of electric cars arriving ahead of schedule.

How Electric Cars Work: Motors
It has to do with magnetism and the natural interplay between electric fields and magnetic fields. When an electrical circuit closes allowing electrons to move along a wire, those moving electrons generate an electromagnetic field complete with a north and a south pole. When this happens in the presence of another magnetic field—either from a different batch of speeding electrons or from Wile E. Coyote's giant ACME horseshoe magnet, those opposite poles attract, and like poles repel each other.


 

Electric motors work by mounting one set of magnets or electromagnets to a shaft and another set to a housing surrounding that shaft. By periodically reversing the polarity (swapping the north and south poles) of one set of electromagnets, the motor leverages these attracting and repelling forces to rotate the shaft, thereby converting electricity into torque and ultimately turning the wheels, in a sector where the electric motor market is growing rapidly worldwide. Conversely—as in the case of regenerative braking—these magnetic/electromagnetic forces can transform motion back into electricity.

How Electric Cars Work: AC Or DC?
The electricity supplied to your home arrives as alternating current (AC), and bidirectional charging means EVs can power homes for days as needed, so-called because the north/south or plus/minus polarity of the power changes (alternates) 60 times per second. (That is, in the United States and other countries operating at 110 volts; countries with a 220-volt standard typically use 50-Hz AC.) Direct current (DC) is what goes into and comes out of the + and - poles of every battery. As noted above, motors require alternating current to spin. Without it, the electromagnetic force would simply lock their north and south poles together. It's the cycle of continually switching north and south that keeps a motor spinning.


 

Today's electric cars are designed to manage both AC and DC energy on board. The battery stores and dispenses DC current, but again, the motor needs AC. When recharging the battery, and with increasing grid coordination enabling flexibility, the energy comes into the onboard charger as AC current during Level 1 and Level 2 charging and as DC high-voltage current on Level 3 "fast chargers." Sophisticated power electronics (which we will not attempt to explain here) handle the multiple onboard AC/DC conversions while stepping the voltage up and down from 100 to 800 volts of charging power to battery/motor system voltages of 350-800 volts to the many vehicle lighting, infotainment, and chassis functions that require 12-48-volt DC electricity.

How Electric Cars Work: What Types Of Motors?
DC Motor (Brushed): Yes, we just said AC makes the motor go around, and these old-style motors that powered early EVs of the 1900s are no different. DC current from the battery is delivered to the rotor windings via spring-loaded "brushes" of carbon or lead that energize spinning contacts connected to wire windings. Every few degrees of rotation, the brushes energize a new set of contacts; this continually reverses the polarity of the electromagnet on the rotor as the motor shaft turns. (This ring of contacts is known as the commutator).

The housing surrounding the rotor's electromagnetic windings typically features permanent magnets. (A "series DC" or so-called "universal motor" may use an electromagnetic stator.) Advantages are low initial cost, high reliability, and ease of motor control. Varying the voltage regulates the motor's speed, while changing the current controls its torque. Disadvantages include a lower lifespan and the cost of maintaining the brushes and contacts. This motor is seldom used in transportation today, save for some Indian railway locomotives.

Brushless DC Motor (BLDC): The brushes and their maintenance are eliminated by moving the permanent magnets to the rotor, placing the electromagnets on the stator (housing), and using an external motor controller to alternately switch the various field windings from plus to minus, thereby generating the rotating magnetic field.

Advantages are a long lifespan, low maintenance, and high efficiency. Disadvantages are higher initial cost and more complicated motor speed controllers that typically require three Hall-effect sensors to get the stator-winding current phased correctly. That switching of the stator windings can result in "torque ripple"—periodic increases and decreases in the delivered torque. This type of motor is popular for smaller vehicles like electric bikes and scooters, and it's used in some ancillary automotive applications like electric power steering assist.


 

Permanent-Magnet Synchronous Motor (PMSM): Physically, the BLDC and PMSM motors look nearly identical. Both feature permanent magnets on the rotor and field windings in the stator. The key difference is that instead of using DC current and switching various windings on and off periodically to spin the permanent magnets, the PMSM functions on continuous sinusoidal AC current. This means it suffers no torque ripple and needs only one Hall-effect sensor to determine rotor speed and position, so it's more efficient and quieter.

The word "synchronous" indicates the rotor spins at the same speed as the magnetic field in the windings. Its big advantages are its power density and strong starting torque. A main disadvantage of any motor with spinning permanent magnets is that it creates "back electromotive force" (EMF) when not powered at speed, which causes drag and heat that can demagnetize the motor. This motor type also sees some duty in power steering and brake systems, but it has become the motor design of choice in most of today's battery electric and hybrid vehicles.


 

Note that most permanent-magnet motors of all kinds orient their north-south axis perpendicular to the output shaft. This generates "radial (magnetic) flux." A new class of "axial flux" motors orients the magnets' N-S axes parallel to the shaft, usually on pairs of discs sandwiching stationary stator windings in between. The compact, high-torque axial flux orientation of these so-called "pancake motors" can be applied to either BLDC or PMSM type motors.


 

AC Induction: For this motor, we toss out the permanent magnets on the rotor (and their increasingly scarce rare earth materials) and keep the AC current flowing through stator windings as in the PMSM motor above.

Standing in for the magnets is a concept Nikola Tesla patented in 1888: As AC current flows through various windings in the stator, the windings generate a rotating field of magnetic flux. As these magnetic lines pass through perpendicular windings on a rotor, they induce an electric current. This then generates another magnetic force that induces the rotor to turn. Because this force is only induced when the magnetic field lines cross the rotor windings, the rotor will experience no torque or force if it rotates at the same (synchronous) speed as the rotating magnetic field.

This means AC induction motors are inherently asynchronous. Rotor speed is controlled by varying the alternating current's frequency. At light loads, the inverter controlling the motor can reduce voltage to reduce magnetic losses and improve efficiency. Depowering an induction motor during cruising when it isn't needed eliminates the drag created by a permanent-magnet motor, while dual-motor EVs using PMSM motors on both axles must always power all motors. Peak efficiency may be slightly greater for BLDC or PMSM designs, but AC induction motors often achieve higher average efficiency. Another small trade-off is slightly lower starting torque than PMSM. The GM EV1 of the mid-1990s and most Teslas have employed AC Induction motors, despite skepticism about an EV revolution in some quarters.


 

Reluctance Motor: Think of "reluctance" as magnetic resistance: the degree to which an object opposes magnetic flux. A reluctance motor's stator features multiple electromagnet poles—concentrated windings that form highly localized north or south poles. In a switched reluctance motor (SRM), the rotor is made of soft magnetic material such as laminated silicon steel, with multiple projections designed to interact with the stator's poles. The various electromagnet poles are turned on and off in much the same way the field windings in a BLDC motor are. Using an unequal number of stator and rotor poles ensures some poles are aligned (for minimum reluctance), while others are directly in between opposite poles (maximum reluctance). Switching the stator polarity then pulls the rotor around at an asynchronous speed.


 

A synchronous reluctance motor (SynRM) doesn't rely on this imbalance in the rotor and stator poles. Rather, SynRM motors feature a more distributed winding fed with a sinusoidal AC current as in a PMSM design, with speed regulated by a variable-frequency drive, and an elaborately shaped rotor with voids shaped like magnetic flux lines to optimize reluctance.

The latest trend is to place small permanent magnets (often simpler ferrite ones) in some of these voids to take advantage of both magnetic and reluctance torque while minimizing cost and the back EMF (or counter-electromotive force) high-speed inefficiencies that permanent-magnet motors suffer.

Advantages include lower cost, simplicity, and high efficiency. Disadvantages can include noise and torque ripple (especially for switched reluctance motors). Toyota introduced an internal permanent-magnet synchronous reluctance motor (IPM SynRM) on the Prius, and Tesla now pairs one such motor with an AC induction motor on its Dual Motor models. Tesla also uses IPM SynRM as the single motor for its rear-drive models.


 

Electric motors may never sing like a small-block or a flat-plane crank Ferrari. But maybe, a decade or so from now, we'll regard the Tesla Plaid powertrain as fondly as we do those engines, even as industry leaders note that mainstream adoption faces hurdles, and every car lover will be able to describe in intimate detail what kind of motors it uses.
 

 

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Arvato commissions first solar power plant

Arvato Ontario Solar Power Plant advances sustainability with rooftop photovoltaic panels, PPA financing, and green electricity, generating 800,000 kWh annually to cut logistics emissions, reduce energy costs, and support carbon-neutral supply chain operations.

 

Key Points

A rooftop PV system under a PPA, supplying low-cost green power to Arvato's Ontario, CA distribution center.

✅ 1,160 panels produce 800,000 kWh of renewable power yearly

✅ PPA model avoids upfront costs and lowers electricity rates

✅ Cuts center emissions by 72%; 45% roof coverage

 

Arvato continues to invest consistently in the sustainability of its distribution centers. To this end, the first solar power plant in the focus market has now been commissioned on the roof of the distribution center in Ontario, California. The solar power plant has 1,160 solar panels and generates more than 800,000 kilowatt hours (kWh) of green electricity annually. This reduces electricity costs and, with advances in battery storage, further cuts the logistics center's greenhouse gas emissions. Previously, the international supply chain and e-commerce service provider had converted five other distribution centers in the USA to green electricity.

The project started as early as November 2019 with an intensive site investigation. An extensive catalogue of measures and criteria had to be worked through to install and commission the solar power plant on the roof system. After a rigorous process involving numerous stakeholders, the new solar modules were installed in August 2022, similar to utility-scale deployments like the largest solar array in Washington seen recently. However, further approvals and permits were required before the solar system could be officially commissioned, a common step for solar power plants worldwide. Once official permission for the operation was granted, the switch could be flipped in February 2023, and production of environmentally friendly solar electricity could begin.

The photovoltaic system is operated under a Purchase Power Agreement (PPA), a model widely used in corporate renewable energy projects today. This unique financing mechanism is available in twenty-six U.S. states, including California. While a third-party developer installs, owns and operates the solar panels, Arvato purchases the electricity generated. This allows companies in the U.S. to support clean energy projects while buying low-cost electricity without having to finance upfront costs. "The PPA and the resulting benefits were quite critical to the success of this project," says Christina Greenwell, Microsoft AOC F&L Client Services Manager at Arvato, who managed the project from start to finish. "It allows us to reduce our electricity costs while supporting Bertelsmann's ambitious goal of becoming carbon neutral by 2030."

The 1,160 solar panels were added to an existing system of 920 panels owned by the logistics center's landlord. In total, the panels now cover 45 percent of the roof space at the Ontario distribution center. The emissions generated by the distribution center are now reduced by 72 percent with the new solar panels and clean power generation. As Bertelsmann plans to switch all its sites worldwide to 100 percent green electricity, renewable energy certificates will, as seen when Bimbo Canada signed agreements to offset 100 percent of its electricity for its operations, offset the remaining emissions.

"The new solar power plant is a significant step on our path to carbon neutrality and demonstrates our commitment to finding innovative solutions that reduce our carbon footprint," said Mitat Aydindag, President of North America at Arvato. "All employees at the site are pleased that our Ontario distribution center is now a pioneer and is providing effective support in achieving our ambitious climate goal in 2030."

Similar facility-level efforts include the Bright Feeds Berlin solar project underscoring momentum across industrial operations.

 

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