Latest / The 5G Podcast with Fexingo: Wireless Networks, Carriers, and Mobile Infrastructure / How 5G Is Quietly Transforming the Power Grid
Transcript
- Lucas: You know that moment when a storm knocks out power and you're sitting in the dark refreshing the utility app, waiting for an estimated restoration time that keeps getting pushed back? Luna: Oh, I've lived that. Just last summer in Houston—three days without AC. The app said 'crew dispatched' for about eighteen hours. Lucas: Right. And the reason that estimate is so unreliable isn't just the storm damage—it's that most of the grid still relies on communication technology from the 1970s. I'm talking about serial cables, dial-up modems, and radio systems that can only report a fault once every forty-five minutes. Luna: Forty-five minutes to know something's wrong? That feels like an eternity for something as critical as the power grid. Lucas: It is. And that's exactly where 5G enters the picture. Not for your phone—for the substation itself. Utilities are starting to deploy private 5G networks to replace those legacy SCADA systems. SCADA stands for Supervisory Control and Data Acquisition, and it's basically the nervous system of the grid. Luna: So instead of a wire that's been sitting underground since the Carter administration, you get a wireless link that's faster and more flexible. Lucas: Exactly. And the key specification isn't speed in the 'wow I can download a movie' sense. It's latency and reliability. With 5G, you can get end to end latency under 10 milliseconds and 99.999 percent availability if you use network slicing. That's five nines, which is what utilities demand for mission-critical operations. Luna: Network slicing—that's the ability to carve out a virtual dedicated channel on the 5G network, right? So the utility's data doesn't compete with someone streaming Netflix in the same cell. Lucas: Precisely. And that's the game-changer. In the old model, if you wanted dedicated infrastructure, you had to run fiber or buy licensed radio spectrum yourself. Both are expensive and slow to deploy. With a private 5G network, you get dedicated performance over the air, and you can reconfigure it in software. Luna: So who's actually doing this? I know there have been pilot projects, but is anyone using 5G for grid operations at scale? Lucas: One of the most concrete examples I've seen is a pilot in Texas—surprise, surprise—involving AT&T and a regional utility called Bluebonnet Electric Cooperative. They set up a private 5G network at a substation outside Austin. The test was straightforward: monitor transformer health, breaker status, and fault indicators in real time. Luna: And what did they find? Did it actually make a difference? Lucas: The headline number is that fault detection dropped from an average of 45 minutes with the old radio system to under 3 seconds with 5G. That's not just a convenience improvement—that's the difference between a minor outage and a cascading failure that takes down a whole neighborhood. Luna: Three seconds versus forty-five minutes. That's the kind of stat that makes regulators sit up and pay attention. Lucas: And they have. The Federal Energy Regulatory Commission—FERC—released a technical report in late 2025 specifically on 5G for grid modernization. They highlighted three use cases: substation automation, distributed energy resource integration, and wide-area situational awareness. That last one is basically using 5G to get a real-time picture of the entire grid rather than relying on periodic snapshots. Luna: Distributed energy resources—that's solar panels on rooftops, battery storage, that kind of thing. The grid wasn't designed for millions of small sources feeding power back. 5G might help manage that complexity. Lucas: Exactly. Solar and battery inverters need to communicate with the utility to maintain voltage and frequency. Right now, many of them rely on Wi-Fi or even cellular 4G, but those networks can get congested. With 5G network slicing, a utility can guarantee bandwidth for thousands of inverters in a single neighborhood. Luna: And that matters because if too many solar arrays suddenly disconnect during a grid disturbance—which has happened in California—you can get a rapid drop in supply that triggers blackouts. Lucas: Exactly the scenario. In August 2020, during a heatwave, about 200 megawatts of solar generation tripped offline in Southern California because of a frequency excursion. That contributed to rolling blackouts. With low-latency 5G communications, the utility could have commanded those inverters to stay online or adjust output in milliseconds. Luna: So the business case is pretty clear for utilities. But what about the carriers? AT&T and Verizon have been building out 5G for years. Is selling private network slices to utilities a meaningful revenue stream for them? Lucas: It's still early, but analysts at Deloitte estimated that by 2026, private wireless network revenue from the energy sector alone could hit $1.5 billion globally. That's not huge compared to consumer mobile, but it's high-margin and sticky. Once a utility integrates 5G into its control systems, switching costs are high. Luna: And it's not just the big investor-owned utilities. Rural electric cooperatives, like Bluebonnet, are also interested because 5G can cover vast areas more cheaply than running fiber to every substation. Lucas: That's a critical point. Fiber is great but costs about $20,000 to $40,000 per mile to install. For a co-op in west Texas with substations spread across 10,000 square miles, that's prohibitive. A private 5G network using CBRS spectrum—that's the Citizens Broadband Radio Service, a shared band in the 3.5 GHz range—can cover dozens of miles from a single tower for a fraction of the cost. Luna: CBRS is fascinating because it's not exclusive—anyone can use it if they follow the rules. So a co-op can set up its own 5G network without buying spectrum at auction. Lucas: Right. And the equipment ecosystem is maturing. You can now buy a compact 5G base station from companies like Nokia or Ericsson that's designed for industrial use, not just cell coverage. It's about the size of a small suitcase and can be mounted on a pole at the substation. Luna: That's a lot more practical than a traditional cell tower. And it can handle both the utility's own sensors and, if they want, provide general connectivity to customers in the area. Lucas: Some co-ops are actually doing a dual-use model: the private network runs the grid, and they also offer fixed wireless internet to homes that previously had no broadband. That's a social benefit on top of the operational one. Luna: Speaking of benefits, this kind of work takes real investment and expertise. And if you're finding these deep-dive episodes useful—maybe you're in the industry or just curious about where your tax dollars and electricity bills are going—there's a simple way to support the show. Lucas: Yeah, and it's genuinely small. A couple of dollars a month is what keeps these episodes ad-free and focused on real specifics. If you've gotten something out of today's conversation, you can head to buy me a coffee dot com slash fexingo. It's not a subscription—just a one-time thing if the show's been valuable to you. Luna: Every bit helps us keep digging into these niche angles that most business shows skip. And we really do appreciate it. Lucas: Back to the grid. So we've got the technology, the pilots, and the regulatory interest. But there are real hurdles. One is cybersecurity. You're taking a system that was air-gapped—physically isolated—and putting it on a wireless network. That creates new attack surfaces. Luna: And utilities are notoriously risk-averse. The idea of opening up substations to potential remote intrusion is scary, especially after the 2015 Ukraine blackout that was caused by a cyberattack. Lucas: Exactly. That attack used compromised VPN credentials to access SCADA systems. 5G actually has some security advantages—it has built-in encryption and authentication that older radio systems lack. But the integration with existing IT and OT systems is where the risk lies. Luna: So network slicing helps here too, right? You can isolate the utility traffic completely from other traffic, even on the same physical infrastructure. Lucas: That's the idea. A slice is effectively a private end to end network with its own security policies. The 3GPP standards for 5G include network slice-specific authentication and authorization. So a utility can mandate that only its own devices connect to its slice. Luna: Another hurdle is the existing installed base. Utilities have millions of sensors and relays that use old serial protocols like DNP3 or Modbus. They're not going to rip all that out overnight. Lucas: No, and they won't need to. There are 5G gateways that bridge old serial devices to the new network. Think of them as translators. The substation's legacy relay speaks DNP3 over a serial cable; the gateway converts that to IP packets and sends them over 5G. The control center sees the same data it always did, just faster and more reliably. Luna: So it's an incremental upgrade, not a forklift replacement. That makes the business case much easier to sell to a utility board. Lucas: Exactly. And the return on investment can be compelling. One study from the Electric Power Research Institute estimated that 5G-enabled grid automation could reduce outage minutes by 30 to 50 percent for a typical distribution utility. For a mid-sized utility serving 500,000 customers, that's millions of dollars in avoided outage costs and regulatory penalties. Luna: Plus the intangible benefit of customer satisfaction. Nobody likes sitting in the dark. Lucas: Right. And there's a longer-term play here too. As we add more electric vehicles and heat pumps, the load on the grid is going to increase significantly. To manage that without building massive new generation, you need dynamic control—the ability to shift load, charge EVs during off-peak hours, and coordinate distributed storage. That requires a fast, reliable communication network. Luna: 5G is really the only wireless technology that can deliver the latency and reliability for that kind of real-time control. 4G LTE is close, but it wasn't designed for the ultra-reliable low-latency communication, or URLLC, that 5G offers. Lucas: Exactly. URLLC is one of the three pillar use cases of 5G, alongside enhanced mobile broadband and massive IoT. And it's the one that matters most for the grid. The standard targets a latency of 1 millisecond over the air and 99.999 percent reliability. That's enough for even the most demanding protective relaying applications. Luna: So where do we go from here? Are we going to see a nationwide rollout of 5G-enabled smart grids, or will it be more piecemeal? Lucas: I think piecemeal for the next five years, driven by specific pain points. A utility that's rebuilding after a major storm might choose 5G for the new infrastructure. A co-op that can't get broadband to its customers might use 5G to solve both problems at once. And then the early adopters will publish their results, and the laggards will follow. Luna: It's like any industrial IoT adoption curve. The technology is ready, but the organizations have to change their processes and train their people. Lucas: And that's where the real work is. The radio part is the easy part. The hard part is integrating 5G into utility planning, engineering, and operations—and convincing the folks who've been keeping the lights on for thirty years that a new wireless system is reliable enough to trust. Luna: But when you see a pilot like Bluebonnet cutting fault detection from forty-five minutes to three seconds, the argument gets a lot easier to make. Lucas: Exactly. The grid is one of those things we only notice when it fails. 5G won't make it perfect, but it might make those failures a lot shorter and a lot rarer. And that's a transformation worth paying attention to.