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Article courtesy of RMI.
By Katie Siegnerm, Mark Dyson, & Gabriella Tosado

Despite serving only 13 percent of US electricity load, electric cooperatives loom large in conversations about the US energy system’s past, present, and future. The initial vision for nonprofit electric co-ops dates back to the New Deal, when the Rural Electrification Act of 1936 authorized the creation of co-ops to serve rural areas bypassed by the larger electricity providers of the time. Today, 832 distribution co-ops and 63 generation and transmission (G&T) co-ops still serve the majority of rural America, including more than 90 percent of persistent poverty counties (counties with at least 20 percent of their population living in poverty).

As the energy transition ramps up, bringing the benefits of low-cost renewable energy to more and more places, electric co-ops the opportunity to replace their aging coal fleets with wind and solar projects. This can lower electric bills and drive rural economic development in areas that need it.

“If You Know One Co-op…”

Through several years of engagements with co-op leadership and stakeholders, we have learned that electric co-ops face unique and varied constraints as well as incentives when it comes to decarbonizing their generation mix. Co-ops have lagged other utilities in retiring their coal plants, although a spate of coal retirement announcements and emissions reduction goals set by several prominent G&Ts in the past year indicates they may be closing that gap. A combination of rapidly falling costs for renewable energy and battery storage technologies, state climate policy, and member demand for carbon-free electricity is driving that shift.

Nonetheless, a number of G&T co-ops are continuing to operate aging and increasingly uneconomic coal plants without plans for their retirement. This can be due to the nature of some co-op financing structures as well as regulatory and governance models that muddy the economic signal for retirement. For example, coal plants may have undepreciated value that the G&Ts are seeking to recover, and in some cases, they act as the collateral on G&T debt obligations, making their retirement a risk to lenders.

What’s more, co-ops’ nonprofit status limits their ability to take advantage of existing tax credits for wind and solar development. And G&Ts with a history of asset ownership may be reluctant to shift toward greater shares of third-party-owned generation (e.g., wind and solar projects contracted for through power purchase agreements).

In short, co-ops’ situations and needs are as varied as the geographies they serve — as the saying goes, “if you know one co-op, then you know one co-op.” As such, there hasn’t yet been a silver bullet approach that can overcome the barriers to full co-op participation in the clean energy transition.

Federal Policy Can Support and Speed the Co-op Energy Transition

Policy intervention can smooth the path forward for the cooperative energy transition by allowing G&Ts to retire uneconomic coal and replace their fossil generation with clean energy alternatives. This could spur rural economic development and clean tech asset ownership opportunities while at the same time lowering member electricity bills.

Today, federal policymakers have the opportunity to facilitate a coal-to-clean transition among electric co-ops through investment that incents co-ops to retire their coal assets and replace them with renewable generation. The White House includes funding for transitioning rural co-ops to clean energy in its American Jobs Plan, and additional proposals outline incentives that would be available to co-ops for each kW of coal that they replace with clean energy. These proposals also provide direct support to impacted coal plant and mine communities.

The replacement of rural cooperative coal with wind and solar would yield economic development benefits stemming from the construction and operation of those projects, largely in rural communities. Our analysis shows that the tax revenues, land lease payments, and wages generated by these projects, in addition to their low-cost electricity, have the potential to more than offset any cost of the policy.

Planting Seeds of Opportunity in Co-op Territory

To quantify the benefits that might accrue to rural communities from a policy that facilitates co-op coal retirement and re-investment in clean energy, we developed estimates for the direct local revenues that new wind and solar projects could produce in the states where the coal was retired based on our Seeds of Opportunity report methodology. The analysis uses the capacity expansion model from UC-Berkeley and GridLab’s 2035 Report to estimate the share of wind and solar projects that would be built in a particular state, as well as the report’s state-level capacity factors for wind and solar.

While we assumed full generation replacement with wind and solar, the economic development benefits could vary based on the actual choices co-ops make upon retiring their coal fleets. For instance, the addition of battery storage, transmission assets, energy efficiency projects, and other clean energy technologies that might be needed could yield additional revenue streams and energy bill savings over and above what is captured here.

The coal plants captured in this analysis are at least partially owned by co-ops and extend across 23 states and 33 co-op territories. Arkansas and North Dakota, the two states with the most coal plants (five each) that might take advantage of federal policy incentives to retire, could see $4.8 billion and $4.2 billion, respectively, from replacing their co-op coal generation with new wind and solar projects.

In Ohio, retiring the 1,265 MW Cardinal coal plant could spur over 4,000 MW of wind and solar project development, contributing nearly $2 billion in revenues to the state’s rural economy. Florida’s even larger Seminole coal plant, should it utilize federal policy incentives to retire, could pave the way for 4,400 MW of solar projects that would generate $2.3 billion in economic development to rural parts of the state.

The map and table below illustrate the location of all coal plants with a share of co-op ownership and the new wind and solar capacity that would be needed to offset each plant’s 2019 annual generation. We then show the economic development that these projects would produce over the course of their lifetimes.

Click image for full table as PDF.

We recognize that coal plant retirements raise questions about maintaining the reliability of the local electric grid. The wind and solar replacement capacity modeled here indicates what would be needed to fully replace the annual generation of the retiring coal, but of course, the grid reliability considerations are more complex.

In some cases, the co-op territory or region may have excess capacity on the system, which is a fairly prevalent characteristic of regional grids, as we document in a recent white paper. This makes replacement capacity unnecessary. In other cases, the co-op may need new capacity as well as other grid resources such as flexible demand or storage to maintain system reliability. These solutions will be developed on a co-op-by-co-op basis — what is shown here is the local economic upside that any new renewables capacity would bring.

Co-ops Can Be Renewable Energy Leaders

Co-ops are poised to play a leading role in enabling rural America to reap the benefits of wind and solar development. Federal policy that unlocks this potential is likely to see a strong return on investment in the form of jobs and revenues flowing to rural residents, landowners, and communities.

A $10 billion investment to support co-ops’ energy transition efforts as contemplated in the Biden Administration’s American Jobs Plan would yield just over $50 billion in wind and solar-induced economic development revenues — benefits five times greater than the cost of the policy. Coupled with the lower operating cost of renewable energy and transition support to impacted communities, a modest federal incentive could provide outsized economic benefits to rural communities and position cooperatives to be renewable energy leaders.


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Switzerland put vertical solar panels on a roadside retaining wall

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Switzerland put vertical solar panels on a roadside retaining wall

A canton in Switzerland commissioned a project in which solar panels were attached vertically to a roadside retaining wall.

The canton of Appenzell Ausserhoden in northeastern Switzerland is aiming to generate at least 40% of its electricity from renewables by 2035. So, it exercised a little creativity and covered a roadside retaining wall with 756 glass-glass solar panels.

The panels have an output of 325 kW and an energy yield of around 230,000 kWh annually. This is equivalent to the consumption of about 52 Swiss households. The energy will be fed into the grid of energy supplier St. Gallisch-Appenzellische Kraftwerke, and the canton will get a feed-in tariff in return.

German mounting system provider K2 Systems and Swiss contractor Solarmotion installed the vertical system on the 75-degree retaining wall. The panels were anchored on a mounting rail with HUS screw anchors, and Lichtenstein-based Hilti provided mechanical dowels. 

The PV system was anchored on and in the masonry using an adhesive technique. An anchoring depth of a maximum of 90 mm could not be exceeded so that the retaining wall would not be adversely affected.

Due to the close proximity to the asphalt, the solar panels’ components are subject to exceptional corrosion requirements and are anodized for protection. Indirect components are made of aluminum – only the screw anchors are made of stainless steel.

K2 Systems says that “especially in the winter months (when consumption and dependence on foreign electricity imports are at their highest), the vertically aligned modules will achieve a very good electricity yield.”

Electrek’s Take

This isn’t a big project, but it’s a delightfully creative one, which is why it caught my eye. A retaining wall is dead space, and snow will slide off the panels in Swiss winters.

We at Electrek love it when solar is installed in intelligent and inventive ways. Warehouse rooftops? Cover them. Highway medians? Canal covers? Box stores? Put solar on them. It just makes sense.

Read more: In a US first, California will pilot solar-panel canopies over canals

Photo: K2 Systems


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Your personalized solar quotes are easy to compare online and you’ll get access to unbiased Energy Advisers to help you every step of the way. Get started here. – ad*

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Doroni’s all-electric flying car gets flight certified in the US

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Doroni's all-electric flying car gets flight certified in the US

Flying electric cars are not just for sci-fi movies. Miami-based Doroni Aerospace announced Friday its all-electric flying car, the Doroni H1, received official FAA Airworthiness Certification. And the best part – it’s designed to fit in your garage.

Doroni’s all-electric flying car gets FAA-certified

Doroni claims to be the first company to test manned flights with a 2-seater flying electric car in the US. The Doroni H1 took flight earlier this year.

CEO Doron Merdinger successfully piloted the personal electric vertical takeoff and landing aircraft (eVTOL) this summer. Merdinger said receiving the flight certification “is not just a milestone for our company, but a leap forward for the entire field of personal air mobility.”

He says the electric flying car “is poised to redefine urban transportation.” Doroni’s aircraft has already received over 370 pre-orders as the startup wraps up funding efforts.

Powered by ten independent propulsion systems, the all-electric flying car has a claimed top speed of 140 mph (100 mph cruising speed) and 60 miles range. Its unique design ensures stability during flight.

all-electric-flying-car
Doroni’s electric flying car (Source: Doroni)

It includes four ducts containing two e-motors with patented ducted propellers. Eight are for vertical flight with an additional “two pushes.”

The two-seater aircraft is designed to fit inside a two-car garage at 23 ft in length and 14 ft in width. It also features fast charging (20% -80%) in under 20 minutes.

all-electric-flying-car
Doroni’s electric flying car prototype (Source: Doroni)

Electric flying cars coming to a dealership near you

Doroni’s all-electric flying car is semi-autonomous, meaning you can guide it to different levels. A controller stick is used to push you forward, backward, or to the side.

all-electric-flying-car
Doroni H1 interior control stick (source: Doroni)

Who would buy one of these? Doroni says one of its customers is a doctor who wants to use the aircraft to skip traffic on their way to work. However, you will need a certification. It requires at least 20 hours of experience, 15 inside the aircraft and another five solo.

Merdinger says the biggest use case for eVTOLs will be for air taxis or ride-sharing. Doroni aims for a different market though.

all-electric-flying-car
Doroni electric flying car concept (Source: Doroni)

The company says there is enough space to fly everywhere, especially in suburban areas. Doroni’s all-electric flying car is designed for more than just getting you from point A to point B. It allows you to “enjoy nature,” according to Merdinger.

Doroni expects to build about 120 to 125 units by 2025 or 2026. Eventually, the Miami-based startup plans on scaling to produce 2,500 eVTOLs annually. You can learn more about the electric flying car on Doroni’s website.

first-flying-electric-car-dealerships
(Source: Alef Aeronautics)

The company is the latest to receive the flight certification. Alef’s Model A was the first electric flying car to get certfied in June.

Alef said it had 2,500 pre-orders in July. The orders include 2,100 from individuals and 400 from businesses, including a California car dealership.

Electrek’s Take

Are electric flying cars going to take over road transportation? Not necessarily. At least not anytime soon.

Doroni and Alef are both working on niche markets, which makes the most sense for the time being. At the same time, the companies are pushing forward another sustainble means of transport.

As Merdinger explained “this is just the beginning,” as the technology advances.

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Rivian already has a patent on Tesla’s Cybertruck ‘range extender’

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Rivian already has a patent on Tesla's Cybertruck 'range extender'

Tesla delivered the first Cybertrucks yesterday, and with that delivery event came the revelation that in order to get the range it promised, the Cybertruck needs a separate battery pack in the bed. But a similar battery pack system was already patented years ago, by one of Tesla’s competitors in the electric pick-up space.

Tesla’s Cybertruck website included a revelation about a feature that wasn’t mentioned in its presentation: a “range extender,” in the form of an additional battery pack in the truck bed which expands the truck’s range.

It’s an interesting solution, and we don’t know all the details of it yet. We don’t know the cost, the weight, how it will be installed and uninstalled, or whether it even can be uninstalled.

The battery pack is intended to be used “for very long trips or towing heavy things up mountains,” according to Tesla CEO Elon Musk. It takes up about a third of the truck bed, as can be seen in a photo posted on Tesla’s Cybertruck site.

Tesla Range extender battery pack

So, there’s still room for cargo, just not the full 6 feet of bed length that Tesla says the Cybertruck has.

But the fact that it was described as being used only “for very long trips or towing heavy things up mountains” suggests that it will be removable, since most people don’t do that sort of thing every single day.

Making it removable is actually a good solution, because it can lower prices, make packaging easier, and improve efficiency for vehicles that simply don’t need a ridiculously enormous 470-mile battery – and most drivers don’t need that.

And if it is removable, well, there’s already a patent on that.

In 2019, electric truck maker Rivian filed a patent for a “removable auxiliary battery” that would fit into the front third-or-so of the truck bed. This patent was granted in 2020, so Rivian currently has a patent on this technology.

The patent is described as:

An electric vehicle system for transporting human passengers or cargo includes an electric vehicle that includes a body, a plurality of wheels, a cargo area, an electric motor for propelling the electric vehicle, and a primary battery for providing electrical power to the electric motor for propelling the electric vehicle. An auxiliary battery module is attachable to the electric vehicle for providing electrical power to the electric motor via a first electrical connector at the auxiliary battery module and a second electrical connector at the electric vehicle that mates with the first electrical connector. The auxiliary battery module can be positioned in the cargo area while supplying power to the electric motor, and can be removable and reattachable from the electric vehicle. The auxiliary battery module includes an integrated cooling system for cooling itself during operation of the electric vehicle including a conduit therein for circulating coolant.

We aren’t patent lawyers here, but this sounds awfully similar to Tesla’s “range extender.” The obvious potential differences we can find are if the range extender doesn’t have integrated cooling, which is unlikely, or if the range extender isn’t removable, which doesn’t seem to jive with the statement that it is only for long trips or with the marketing showing it as an optional add-on (if that were the case, why not just offer different battery sizes?).

Tesla itself has many patents (and is still pursuing more of them), but has pledged not to “initiate patent lawsuits against anyone who, in good faith, wants to use its technology.” It announced this in a 2014 blog post, and followed up by saying that it thinks several companies are using its patents.

So next, the question is: is Tesla’s solution different enough to avoid Rivian’s patent protection? Has Tesla licensed the idea from Rivian, and we just haven’t heard about it yet? Or will Rivian return Tesla’s “good faith” and not initiate a patent lawsuit against Tesla, if it does feel like it has a good enough case to say that Tesla’s range extender infringes on its patent?

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