Latest / The 5G Podcast with Fexingo: Wireless Networks, Carriers, and Mobile Infrastructure / How 5G Networks Are Reshaping the Energy Grid
Transcript
- Lucas: So when we talk about 5G transforming industries, we usually think of hotels, stadiums, cruise ships — the kind of places where you notice faster download speeds. Luna: Right — consumer-facing stuff. The visible upgrades. Lucas: Exactly. But I think one of the most consequential transformations is happening somewhere most people never see: the electric power grid. And it's not about speed. It's about latency and reliability. Luna: The grid. That's a massive system. How does 5G fit in? Lucas: Let me give you a concrete case. Duke Energy — one of the largest utilities in the U.S., serving about 8 million customers — has been working with Verizon on a private 5G network pilot in South Carolina. The goal is to connect thousands of grid-edge devices: solar inverters, battery storage systems, smart transformers, even individual smart meters. Luna: And why does that need 5G? 4G LTE can handle a lot of meters. Lucas: It can handle polling — reading data once every 15 minutes. But what utilities increasingly need is real-time control. A solar inverter on a home rooftop can fluctuate output by 50 percent in seconds when a cloud passes. If you have 10,000 of those on a feeder circuit, that creates voltage swings that can destabilize the grid. 4G's latency — typically 30 to 50 milliseconds — isn't fast enough for coordinated response. 5G can get under 10 milliseconds, and with network slicing, you can guarantee that control signals get priority over YouTube traffic. Luna: So it's not just more data — it's a different kind of data. Time-critical commands. Lucas: Exactly. And the industry has a name for this: ultra-reliable low-latency communications, or URLLC. That's the 5G feature set designed for industrial control. The grid is one of its killer applications. Luna: How big is the operational upside? Beyond just keeping the lights on. Lucas: McKinsey published a report last year estimating that 5G-enabled grid automation could save U.S. utilities about $2.3 billion annually by 2030. That's from reduced truck rolls, faster fault isolation, and less energy lost to inefficiency. Duke alone is targeting 40,000 connected devices by 2027. Luna: Forty thousand — that's significant. But is the grid really ready for that kind of connectivity? I mean, substations are notoriously harsh RF environments. Lucas: That's where private 5G networks come in. Utilities like Duke and Southern Company are deploying dedicated small-cell sites on their own land — inside substation fences. That gives them complete control over spectrum, security, and quality of service. No sharing with consumer phones. And because it's private, they can tune the network for the specific mix of devices — some needing low bandwidth but ultra-low latency, others needing high bandwidth for video inspections. Luna: So it's like having your own 5G network, separate from the public one. Lucas: Exactly. And the spectrum for that is becoming available. The CBRS band in the U.S. — 3.5 gigahertz — was opened for shared commercial use a few years ago, and utilities were among the first to apply for priority access licenses. That spectrum propagates well through suburban environments and can cover a substation yard with a single small cell. Luna: I'm curious about the security angle. The grid is critical infrastructure — the last thing you want is a 5G network becoming an attack surface. Lucas: It's a legitimate concern, and utilities are taking it seriously. Private 5G is actually more secure than Wi-Fi or public LTE because the network is physically isolated and the SIMs are managed by the utility themselves. They can also implement network slicing to separate different traffic types — so a firmware update to a smart meter never touches the same slice as a trip signal to a circuit breaker. Luna: Makes sense. What about the economics? These private networks aren't cheap to deploy. Lucas: They're not. But the business case pencils out when you avoid even one major outage. A single transformer explosion can cost a utility millions in replacement equipment and lost revenue. And then there's the regulatory pressure: the Federal Energy Regulatory Commission has been pushing for faster grid modernization, especially after the Texas winter storm in 2021 and the California wildfires. A more resilient grid is no longer nice to have — it's a mandate. Luna: So we're seeing a convergence: regulatory push, maturing 5G technology, and a real operational need. Lucas: Yes. And the early movers are already publishing results. Duke's pilot in South Carolina showed they could detect and isolate a fault in under 100 milliseconds using 5G — compare that to minutes or even hours with manual switching. That's the difference between a momentary flicker and a multi-hour blackout. Luna: Hundred milliseconds. That's faster than a human blink. Lucas: Right. And the implications go beyond just preventing blackouts. With that kind of responsiveness, utilities can start doing things like dynamic load balancing — automatically adjusting charging rates for electric vehicles based on real-time grid conditions. Or using distributed battery storage as a virtual power plant, discharging during peak demand and recharging at night. Luna: That's the real promise — not just a smarter grid, but a more flexible one. One that can handle renewables, EVs, and extreme weather without needing to build as many new power plants. Lucas: Exactly. And I think that's the story that doesn't get told enough. 5G in the grid isn't about faster Netflix. It's about enabling the clean energy transition at scale. Without low-latency communications, you simply cannot integrate millions of intermittent renewable sources and millions of EVs into the same network reliably. Luna: It's the invisible backbone. Lucas: Yeah. And that's what makes it exciting — and, honestly, worth talking about. If this episode gave you something useful, I'll just say: if it's worth a coffee to you, you know where to find the link — buy me a coffee dot com slash fexingo. Luna: It's a small way to keep the show ad-free and independent. Lucas: Exactly. So back to the grid — we've talked about North America, but globally the picture is even more dramatic. In Europe, where renewable penetration is higher — Germany sometimes runs on 60 percent wind and solar — grid operators are already using 5G to manage curtailment. If a storm suddenly drops wind output, they need to fire up gas peaker plants within seconds. 5G gives them the control channel to do that reliably. Luna: So it's not just a U.S. story. And it's not future-hype — it's happening right now. Lucas: Absolutely. I think the question going forward is not if, but how fast. The spectrum is there, the chipsets are there, the business case is there. The bottleneck is really just the pace of utility procurement cycles. But once a few major players like Duke and Southern Company prove it out at scale, I expect the rest to follow quickly. Luna: And that could mean a grid that's not just smarter, but fundamentally more resilient. Which, given the climate trends, is something we all depend on. Lucas: Right. And that's the transformation worth watching.