energy-efficiency
(100)
APS and the hours that matter
Arizona has sunshine to spare. Arizona Public Service has to make the electricity last through dinner - and persuade customers that the bill is worth it.
Quanex makes the parts that make the whole
A window’s overlooked edge explains Quanex’s business. Its expansion into hardware explains both the opportunity and the bill.
Portland General Electric is buying time.
The Oregon utility is learning to move electricity through the day as carefully as it moves it across the state. The experiment involves giant batteries, household thermostats and some expensive lessons.
Idaho Power is buying time
A river built Idaho Power. Now batteries, a 290-mile transmission line and the timing of everyday demand are shaping what comes next.
Baltimore Gas and Electric: The price of keeping the lights on
A painter’s gaslight experiment became central Maryland’s energy network. Two centuries later, BGE’s hardest problem is making reliability affordable.
New Jersey Resources puts the reservoir to work
A gas utility, a floating solar array, and a $367.5 million storage bet. Inside an energy company that makes its living connecting useful assets to people who need them.
NW Natural’s next act is inside the pipes
The Northwest utility once changed its fuel without replacing its business. Its next transition is testing how far old pipes can carry a new idea.
Madison Air makes the invisible count.
A hospital fan explains the business better than a balance sheet. Madison Air buys specialist brands that make air useful, then sells the reliability, efficiency and control that come with it.
Comfort Systems USA builds the other half of the cloud
Data centers need chips. They also need cold water, reliable power, and people who know where every pipe belongs. Comfort Systems USA has built a business around that less glamorous half of progress.
The power to turn it off
Southern California Edison serves 15 million people. Its hardest job is deciding how to keep the lights on when the wires themselves can become a threat.
Owens Corning is betting the house.
The company that made insulation pink spent $3.9 billion on doors. Its next act starts with a surprisingly small idea: make the builder’s job easier.
Nidec Motor Corporation makes the upgrade fit.
A better motor is only useful if someone can install it. Inside Nidec Motor Corporation’s surprisingly practical approach to moving water, air, and industry.
EMCOR builds what the cloud stands on.
The digital economy still needs electricians, pipefitters and cold air. EMCOR has built a $16.99 billion business around the things a server cannot do for itself.
Regal Rexnord makes the parts that keep the world moving
A factory can lose thousands of dollars an hour when one ordinary component stops working. Regal Rexnord has built a business around making those components - and getting them to work together.
Watsco sells the minutes back
A broken air conditioner creates a race against the clock. Watsco built a distribution business around helping the contractor win it - then put software in the contractor’s pocket.
Carlisle found its future on the roof.
A company born making bicycle inner tubes sold its way out of diversification. Its next bet: building materials that save the contractor time and the owner energy.
Georgia Power and the price of always on
Two new reactors made Georgia Power a test case for American nuclear construction. The harder question is what reliable electricity should cost the people who depend on it.
IceMOS makes more of silicon.
From the parts inside Swiss watches to the switches inside power supplies, IceMOS builds a business around a deceptively useful skill: changing the shape of silicon.
A faster chip. A familiar way in.
Cambridge GaN Devices puts the difficult parts of gallium nitride inside the chip. Its bet: engineers will adopt better power electronics faster when they can keep tools they already trust.
FortiFi put the upgrade on the tax bill
A new roof. A stronger window. A bill that arrives with the property taxes. FortiFi built its business around that connection - and its obligations outlast the sale.
BITMAIN and the price of a hash
Bitcoin looks weightless. BITMAIN builds the machines that make it heavy - and sells miners a way to do more work with less electricity.
Cycle Capital bets on the parts that save power
A chip, a membrane, a better molecule: Cycle Capital backs the machinery behind a less wasteful economy. Its wager is that climate technology wins customers when it improves the bill as well as the planet.
ANB makes clean energy wait less
A solar installation can be ready while its paperwork is still making the rounds. ANB Systems built a business around shortening that journey - and DNV bought it for $39.4 million.
View taught windows to think. The bill came later.
A pane of glass that anticipates the sun is an appealing invention. View’s harder experiment was making that invention behave like a durable, affordable building business.
Bidgely knows what your electricity bill won’t tell you
The meter sees a house. Bidgely looks for the appliances inside it - then helps utilities turn those clues into lower bills, better-targeted programs and a more manageable grid.
Enlighted and the building that knew too much
Enlighted turned the humble light fixture into a source of building intelligence. Its customers reported substantial savings, but in 2025 Siemens chose to wind down the lighting business and keep the workplace software.
Velaura AI Is Selling the Watts Its Chips Do Not Use
Once a maker of Bitcoin miners, the Santa Clara chip company now offers AI builders a different prize: more computing inside the same power budget. The arithmetic is promising; the hard part is making a lower-voltage chip behave.
The Air Conditioner That Read the Room
Mojave Energy Systems built a commercial air conditioner around an inconvenient fact: a room can be cool and still be too damp. Its answer starts with salt, then asks the cooling equipment to do less.
The Quantum Computer That Wants a Seat Beside the GPU
AI keeps asking for more power. Sygaldry's wager is that the next useful server will have more than one kind of qubit - and a place beside the GPUs already humming in the data center.
Auradine Built a Better Bitcoin Machine - Then Followed the Electricity
It raised $81 million before it had a product, earned $80 million in bookings with machines built to mind the power grid, and then made its most revealing move: leaving the Bitcoin-miner business behind to chase AI's electricity problem.