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Most factories still run on fossil fuels, whether theyre making potato chips or steel. But a new “thermal battery” could make it cheaper to do the same work with clean energy. Electrified Thermal Solutions, a startup spun out from MIT research in 2021, just fired up a demo battery that can hit 1,800degrees Celsiushot enough to make steel, cement, or chemicals. The battery uses power from the grid to heat its custom bricks when electricity is cheap. When a factory needs hot air later, it’s provided by the superheated bricks. [Photo: Electrified Thermal] Its also cheaper to use than natural gas, so factories dont need a climate goal to be convinced to make the switch. [Image: Electrified Thermal] “This is a cheaper approach to heat that today isn’t being taken advantage of, says Daniel Stack, cofounder and CEO of Electrified Thermal Solutions. Electricity is already a cheaper heat source than natural gas, but in the past factories haven’t been able to feasibly use it with their equipment. Some other startups are making similar thermal batteries, but cant reach the highest temperatures needed by certain industries. Electrified Thermals tech, called the Joule Hive Thermal Battery, uses a unique conductive brick that electricity can flow straight through, enabling ultra-high temperatures. [Photo: Electrified Thermal] Backers include ArcelorMittal, the worlds largest steelmaker, which could eventually use the technology to heat up equipment like blast furnaces. The savings for industrial customers could be substantial. We can charge up with the cheapest electricity during hours of low prices, and this can save you 15%, 20%, 30% on your heating bill, Stack says. These commodity industries live and die by the price they pay for their heating inputs. Both in the U.S. and Europe, wholesale electricity prices drop close to zeroor even negative pricesat certain times when renewable energy is abundant. The startup is focused first on Europe, where policy makes it easier to access that cheap electricity. (Even as electricity demand grows from data centers, Stack says that there will still be plenty of surplus electricity available at particular hours at a lower price.) [Photo: Electrified Thermal] The tech is designed to be easily added to existing factories, with pipes connecting hot air from the batteries into existing kilns, boilers, or furnaces. Customers have the option to pay for heat as a service or buy the batteries directly. The new demonstration system, at the Southwest Research Institute in San Antonio, will let potential customers see the equipment in action. Commercial units will begin rolling out to some customers later this year. The batteries can easily scale up, Stack says, and are made from off-the-shelf materials. The bricks are similar to those used in glassmaking, and a large manufacturer, HWI, is beginning to mass manufacture them. If industry at large makes the switch, the climate benefits would be huge. By one estimate, industrial process heat uses around 20% of the world’s energy. “We’re talking about massive emissions reductionsto the tune of several gigatons per year of CO2reduced through this transition,” Stack says.
Category:
E-Commerce
When I tell fellow tech executives that every employee at sunday, from our engineers to our finance team, must complete a restaurant shift before they can fully onboard, I usually get confused looks. “You mean like, shadow someone?” they ask. No. I mean they tie on an apron, take orders, run food, and yes, deal with the 15-minute wait for the check that our product was literally built to eliminate. It sounds extreme. It is extreme. And it’s also one of the smartest business decisions we’ve made. Here’s why: business is often removed from the industries we serve. Were keeping that empathy right there. The Empathy Gap in Tech I’ve spent 25 years in the tech world, scaling e-commerce unicorns in Europe before cofounding sunday. I’ve seen brilliant engineers build elegant solutions to problems they’ve never personally experienced. I’ve watched product teams debate restaurant workflows they’ve only seen in wireframes. The result? Products that work in theory but fail in the chaos of a Friday night dinner rush. Using our industry as an example, the restaurant space cant be disrupted from a distance. It’s intensely human. A server manages six tables, remembers who wanted dressing on the side, tracks which kitchen orders are running late, and still needs to radiate warmth when checking on the anniversary couple at table twelve. When we ask them to adopt new technology, we’re not just changing their workflow, we’re asking them to trust us with their tips, their table turn times, and their relationship with guests. You can’t design for that kind of stakes without understanding them viscerally. What a Saturday Night Shift Teaches a Software Engineer Last month, I watched our newest engineer finish his restaurant shift at one of our partner locations. He was confident going in; he understood our API integrations, he knew our payment flow inside and out. But after five hours on his feet, he had a revelation. “At the end of my shift, I had to manually enter tips from 22 tables into the POS system,” he told me, exhausted. “Twenty-two times typing in amounts, double-checking I got the numbers right, worrying I’d accidentally shortchange myself or mess up the restaurant’s accounting. The whole time I’m thinking about the train I’m about to miss, and I’m doing math in my head to see if my night was even worth it. It took 15 minutes of my life I’ll never get back.” This wasn’t theoretical anymore. “I finally understood what we’re actually saving people from,” he told me the next day. “It’s not just 15 minutesit’s the mental load of worrying you made a mistake, the frustration of doing data entry when you’re exhausted, the indignity of technology making your life harder instead of easier. When I use sunday now, I know exactly whose time I’m giving back.” That’s the point. Empathy at scale isn’t built through user research reports. It’s built through experience. Hospitality as a Business Philosophy What started as a practical requirement has become central to how we think about everything at sunday. Hospitality isn’t about being nice. It’s about anticipating needs, moving with urgency, and making people feel valued even under pressure. Those principles translate directly to how we run our business. When a restaurant partner calls with an issue, our support team doesn’t respond with ticket numbers and SLAs. They respond like servers handling a complaint: with immediate acknowledgment, genuine concern, and a bias toward solving the problem now rather than escalating it later. Our customer success team knows that “I’ll get back to you tomorrow” is the tech equivalent of “your food will be out in a few minutes”a polite deflection that erodes trust. We’ve also borrowed the restaurant world’s obsession with the guest experience. In hospitality, there’s no such thing as “that’s not my table.” If a guest needs something, you handle it. We’ve tried to instill that same mentality. When a new market launch hits a snag, our engineers don’t wait for the ops team to flag it. When a sales issue arises, our product managers jump in. We move like a restaurant team during a rushfluid, collaborative, and focused on the experience we’re creating. The Metrics That Matter Here’s what surprised me most: this policy has become one of our best retention and recruiting tools. We’ve had a 94% retention rate among employees who complete the restaurant shift program, compared to 78% at my previous tech companies. Employees consistently rank it as one of their most valuable onboarding experiences. New hires tell us they appreciate working somewhere that values understanding over assumption. They like that leadership doesn’t just talk about customer obsessionwe quite literally make them walk in our customers’ shoes (and sensible non-slip ones at that). And when we hire, the restaurant shift requirement self-selects for people with the right mindset. Candidates who balk at the idea of working a shift often aren’t the right fit for our culture anyway. The ones who light up at the challenge? Those are our people. The tech industry loves to talk about disruption, but we’re often remarkably detached from the industries we claim to understand. We optimize for what we can measure: clicks, conversions, load times. And we miss what we can’t, the relief on a server’s face when they don’t have to chase down a credit card, the gratitude of a mom who can split a check without asking for help, the pride a restaurant owner feels when their team has more time to create memorable moments. Making our employees work restaurant shifts isn’t a cute culture quirk or a team-building exercise. It’s a business imperative. Every hour our team spends in a restaurant is an investment in building a product that actually solves real problems, not imagined ones. A Challenge to Tech Leaders I’d encourage every tech CEO, especially those building B2B products, to ask yourself: When was the last time you personally experienced the problem your product solves? Not observed it. Not read about it in research. Actually lived it? If the answer is “never” or “it’s been years,” you have a dangerous knowledge gap. Your team is making decisions based on assumptions, building for personas instead of people, and probably missing opportunities that would be obvious to anyone who spent a day in your customers’ reality. You don’t need to make it a formal policy like we have. But you do need to close the empathy gap between your builders and your users. Shadow a shift. Take customer service calls. Use your competitor’s products. Do whatever it takes to remember that behind every user statistic is a human being trying to do their job, feed their family, or simply have a nice dinner without waiting 15 minutes for the check. At sunday, we’ve learned that great technology in the hospitality space doesn’t come from brillian engineers alone. It comes from brilliant engineers who’ve burned their hand on a plate, forgotten which table ordered the gluten-free option, and felt genuine panic when the payment system hiccups during a Saturday night rush. That’s not just good culture. That’s good business.
Category:
E-Commerce
So, youve finally done it. No more putting it off, pushing through the grind, waiting for a more opportune time once things settle down. Alas, youve mustered up the gall to cash in on your paid vacation time. Now you have several days strung together to travel, rest, or do whatever the heck your heart desires. I love that for you. But before you slam your work laptop shut and Yabba dabba doo! your ass out of the office, theres one last thing. Youve gotta leave behind a message letting folks know youll be gone. You need to draft an out-of-office message. Out-of-office notes tend to be pretty standardcourtesy auto-replies letting folks know youre not working, when youll be back, and who, if anyone, they can contact in your stead. Sometimes people add a pop of color hinting at a life outside the office. But these things generally tend to be pretty vanilla. I, for one, wish corporate peeps got more real with this messaging. Treat these notes like early-stage Facebook status updates: Share what youre really thinking, feeling, and experiencing. This year is already a mess; immigrants continue to be targeted by the federal government, unemployment numbers remain dismal, and it seems like everyones got the flu. Why not keep it 100 for whoever reaches out in the interim? Longtime readers will remember when I presented a list of pandemic-era openers as alternatives to I hope this email finds you well. Here are some OOO notes I wish I had the heart to schedule. Deploy at your own risk. I am currently out of office, taking advantage of PTO that is technically unlimited but spiritually frowned upon. I am currently out of office, taking advantage of PTO that is technically unlimited but managerially frowned upon. I am currently out of office to recharge after running on vibes, caffeine, and anxiety for six consecutive quarters. I am out of office avoiding the news for my mental health. Please do not forward any think pieces. I am currently out of office closing the approximately 637 tabs I have openboth literally and mentally. I am currently out of office, wearing a quarter-zip sweater and drinking matcha. I hope this auto-reply finds you doing the same. Im OOO using the gym membership I will abandon by February. I am currently out of office, ignoring my inbox like its a group chat that is doing the most while Im trying to do the least. Ill be out of the office while my outie binge-watches Severance and realizes this job feels familiar. Upon my return, the work will continue to be mysterious and important. I am currently out of office, unpacking last year with a licensed professional. I am currently out of office, pondering the spiritual meaning of six-seven. I am currently out of office, updating my résumé just in case. I am currently out of office, rewatching Sinners so I can feel something again. I am currently out of office but will absolutely read this message anyway and respond once my brain stops buffering. I am currently out of office and launching my side hustle. Please subscribe to my Substack. I am currently out of office, but will be bumping that new A$AP Rocky album until further notice. Im OOO until my burnout is no longer a personality trait. I am currently out of office pivoting to my new self. Lets table this and circle back in Q2, when I have the bandwidth to get my ducks in a row. I am currently out of office, but dont expect a response as soon as I get back. Ill need a few days to remember how to do my job. I am currently out of office, but unfortunately still mentally available.
Category:
E-Commerce
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