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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On today’s sunny side up episode of Quick Charge, we take a look at the latest from the world of solar power, and discuss Congressional Republicans’ plans to limit your energy independence by eliminating a critical tax credit for homeowners nearly ten years early. (!)
We’ve also got a quick review of a massive solar farm powering 200,000 homes in Indiana and the biggest solar project East of the Mississippi – both part of a record 98% of all new power generation and grid capacity introduced in 2025 coming from wind and solar. Those are jobs, those are lower utility rates, those are energy independence … so why are Congressional Republicans working to make that more expensive?
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If you want to read that EnergySage report on the state of the home solar industry, including news about battery energy storage system and V2H/V2G prices and financing trends, you can check it out for yourself, below, then let us know what you think in the comments.
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If you’re considering going solar, it’s always a good idea to get quotes from a few installers. To make sure you find a trusted, reliable solar installer near you that offers competitive pricing, check out EnergySage, a free service that makes it easy for you to go solar. It has hundreds of pre-vetted solar installers competing for your business, ensuring you get high-quality solutions and save 20-30% compared to going it alone. Plus, it’s free to use, and you won’t get sales calls until you select an installer and share your phone number with them.
Your personalized solar quotes are easy to compare online and you’ll get access to unbiased Energy Advisors to help you every step of the way. Get started here.
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A Waymo autonomous vehicle drives along Masonic Avenue on April 11, 2022 in San Francisco, California.
Justin Sullivan | Getty Images News | Getty Images
Alphabet’s Waymo unit has received approval to expand its autonomous ride-hailing service to more parts of the San Francisco Bay Area, including San Jose.
In March, the company submitted a request to the California Public Utilities Commission to gain approval for its latest passenger safety plan, a key step in gaining permission to operate driverless vehicles across a broader area. On Monday, the proposed expansion was approved, allowing for Waymo’s driverless coverage to extend from San Francisco down through the Peninsula.
“We’re very excited to share that the CPUC has approved our application to operate our fully autonomous commercial ride-hailing service in the South Bay and nearly all of San Jose!” the company wrote in a post on X on Monday. “While this won’t change our operations in the near-term, we’re looking forward to bringing the benefits of Waymo One to more of the Bay Area in the future.”
The $5 billion Empire Wind is back in business. The Trump administration’s Bureau of Ocean Energy Management (BOEM) has lifted its stop-work order for Empire Wind, a major offshore wind project off the coast of New York led by Empire Offshore Wind LLC, a subsidiary of Equinor. Construction is now allowed to resume.
Equinor CEO Anders Opedal welcomed the news, saying the restart reinforces Equinor’s commitment to delivering clean energy while supporting local economies and saving thousands of jobs. He also credited a wide coalition of officials for helping get the project back on track, including Trump, New York Governor Kathy Hochul, and congressional leaders like Senator Chuck Schumer and Representative Dan Goldman. Opedal also thanked the Norwegian prime minister and the minister of finance for raising the issue with the US administration.
Governor Hochul said in a statement that “countless conversations with Equinor and White House officials” had taken place.
Neither the BOEM nor the Department of the Interior has issued a comment.
The Trump administration halted construction of the 54-turbine Empire Wind on April 16, but discussions between Equinor, regulators, and leaders at the federal, state, and city levels led to a reversal. That means Empire Wind can now push ahead with its goal of powering 500,000 New York homes with offshore wind energy.
“This project delivers on the energy ambitions shared by the US and New York by providing a vital new source of power to the region,” said Molly Morris, president of Equinor Wind US. She added that Empire Wind is boosting supply chain investments across the country, with activity in New York, Louisiana, Pennsylvania, Texas, and South Carolina.
Equinor plans to reassess the project’s financials in the second quarter. The goal is still to install turbines offshore in 2025 and hit full commercial operation by 2027. The company says it will work with suppliers and regulators to minimize any delays from the month-long pause.
Empire Wind was first awarded its offshore lease in 2017 after a competitive federal process. It received its final construction green light in early 2024 following an extensive environmental review. Construction kicked off shortly after, and the project is now over 30% complete.
The US is a major market for Equinor. The Norwegian energy giant says it has invested around $60 billion in US energy projects since the early 2000s, more recently in low-carbon solutions, critical minerals, and renewables. Empire Wind is one of its flagship projects in the US.
Read more: Trump admin halts $5 billion NY offshore wind project mid-build
If you’re considering going solar, it’s always a good idea to get quotes from a few installers. To make sure you find a trusted, reliable solar installer near you that offers competitive pricing, check out EnergySage, a free service that makes it easy for you to go solar. It has hundreds of pre-vetted solar installers competing for your business, ensuring you get high-quality solutions and save 20-30% compared to going it alone. Plus, it’s free to use, and you won’t get sales calls until you select an installer and share your phone number with them.
Your personalized solar quotes are easy to compare online and you’ll get access to unbiased Energy Advisors to help you every step of the way. Get started here.
FTC: We use income earning auto affiliate links. More.
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