Since the concept of nuclear fusion was first introduced in 1915 by American chemist William Draper Harkins, it’s been regarded as the Holy Grail of power generation. In theory, fusion could deliver near-limitless electricity. Unlike fission, it produces minimal radioactive waste. Unlike wind or solar, it is dispatchable. Unlike fossil fuels, it is carbon-free. All of which is why billions of dollars have flowed into fusion startups claiming that utility-scale fusion power could arrive as early as the 2030s.
What does President Trump know about fusion’s future?
Last month, fusion again made headlines worldwide when the Wall Street Journal reported in a December 18 article that President Trump’s company, Trump Media & Technology, planned to merge with fusion company TAE Technologies — bringing fusion investing (usually the realm of high-risk-tolerant venture investors) to public markets for the first time.
In that article, the Journal noted: It is a gamble that fusion power, which no company or researcher has yet delivered, can be built in time to meet the artificial-intelligence boom’s growing power requirements.
There is still a lot to prove.
Fusion powers the sun and could produce almost-limitless amounts of carbon-free energy if it can be harnessed on Earth. There are so many hurdles that the joke in the energy industry is that fusion is 10 years away and always will be.
Why every energy source depends on substations
There’s a growing disconnect between the future described by sensational headlines and the reality that utilities face today. Even if (or when) fusion ever works — scientifically, economically, and at scale — it will still face the same obstacle confronting every other megawatt on the grid: It has to be delivered.
No matter how electricity is generated — coal, gas, solar, wind, nuclear or (some day) fusion — it must pass through a substation to reach the grid. Which is why today’s investments in substations, interconnections and grid hardening matter far more than speculative breakthroughs scheduled for a decade or more down the road.
In short, fusion isn’t a solution to today’s grid constraints. It’s a bet on tomorrow. Utilities, however, don’t have the luxury of betting their reliability metrics, capital plans or regulatory obligations on the technology. Particularly when we’re experiencing a very real grid crisis right now.
Energy-capacity upgrades you can undertake now
Below are a number of reality-based options that substation operators should consider for meeting ever-increasing market demand for power:
Grid optimization & “hidden capacity” (fastest, cheapest wins)
The U.S. grid already has significant unused capacity that can be unlocked without building new generation.
High-impact measures for grid optimization include:
- Dynamic line ratings (DLR) instead of static conservative ratings.
- Advanced power flow controls (FACTS, phase-shifting transformers).
- Topology optimization and improved dispatch coordination.
- Substation upgrades (breaker additions, bus reconfiguration).
These solutions are often five to ten times less expensive per delivered MWh than new capacity generation. Deployment timelines are typically in months, whereas the average new construction project takes years. At the same time, these solutions enable the delivery of existing generation that is currently either curtailed or stranded. In short, the cheapest energy is capacity you’ve already paid for, but can’t fully use.
Substation expansion & modernization (highest leverage investment)
Substations are the dominant constraint in Interconnection Queues, Load Growth (data centers, EVs, manufacturing) and Renewable Integration.
What works best:
- Adding transformer capacity
- Expanding breaker positions
- Upgrading protection and controls
- Hardening for reliability and extreme weather
These solutions are also far less expensive per delivered MWh than the cost of building new plants. Moreover, they can often be used to unlock multiple projects simultaneously, while converting “zero-value” stranded energy into delivered energy. In fact, a single substation upgrade, done correctly, can actually unlock more usable power than an entire new power plant.
Demand-side management & load flexibility (underused and very cheap)
The reason demand-side management is so important is that peak demand — not total energy — drives the most expensive infrastructure.
High-return strategies include:
- Time-of-use pricing
- Industrial demand response
- Data center load shifting
- Smart EV charging
All things considered, demand-side management is the power industry’s least expensive “resource.” It requires no generation or transmission investments, and reduces peak energy that would otherwise require inefficient peaker plants. In short, shifting demand is often significantly cheaper than supplying it.
Utility-Scale Solar + Existing Interconnection Capacity
As we reported in our September, 2025 post, solar remains the fastest and cheapest alternative for new power generation. However, that’s true only if it can interconnect.
Where it’s most efficient
- Brownfield sites
- Retrofitting existing substations
- Co-location with storage
- Re-powering older interconnection rights
Compared to nuclear plants, which often take decades to build, and natural gas-fired power plants (which take up to four years), solar plants can be built in as little as 12 to 18 months. What’s more, they offer high Daytime Capacity value in optimal regions. However, without the necessary substation capacity, solar’s cost advantage disappears.
Battery Energy Storage Systems (When Used Surgically)
A common problem with BESS systems is that storage is often misapplied. But when targeted correctly, it can be a powerful efficiency-enhancing option.
Most efficient use cases:
- Peak shaving
- Congestion relief
- Deferring substation upgrades
- Firming existing renewables
The investment efficiency of BESS systems is consistently high when they’re used to avoid or delay major infrastructure additions. ROI is significantly lower when BESS is used as bulk generation replacement. It may not be an energy-creating solution, but it can be excellent for system-optimizing. The bottom line for BESS solutions is this: Storage works best as a grid tool, not a silver bullet.
Life Extension & Uprates of Existing Generation
This option involves a set of engineering, regulatory and operational actions that allow existing power plants to operate longer, run more efficiently and / or produce more electricity — without building new facilities. In plain English, it’s getting more usable power out of assets you already own and have connected to the grid. The biggest advantage is that interconnection is already solved, and grid interconnection is often the most expensive and time-consuming part of any power project. Here’s why it matters —
Existing plants already have:
- Permits
- Fuel supply
- Interconnections
- Trained operators
High-value actions you can undertake:
- Turbine upgrades
- Efficiency improvements
- Nuclear life extensions
- Reliability upgrades
These actions alone can save years and hundreds of millions of dollars. That said, there are limits and tradeoffs to life extension and uprates.
Constraints include:
- Substation or transmission capacity limits
- Cooling water availability
- Environmental permit ceilings
- Equipment supply chains
This is where substation upgrades often become the gating factor for realizing uprate potential.
Why utilities are leaning into life extension and uprates:
Utilities are prioritizing life extensions and uprates because they —
- Deliver firm power quickly.
- Avoid interconnection queues.
- Reduce capital risk.
- Support reliability during the energy transition.
- Buy time for future technologies (SMRs, fusion, long-duration storage).
Substations: The gatekeepers of every energy future
Even the most advanced fusion reactor imaginable will be worthless without adequate substation capacity, modern protection schemes and reliable interconnections. If anything, fusion’s promise of large, centralized, high-output generation would increase demands on substation design, construction and modernization.
What’s more, some of the most expensive energy in our system today is not fossil fuel generation. It’s renewable and / or low-carbon generation that can’t reach load because the grid can’t accommodate it.
The irony is hard to miss: While policymakers debate future technologies like fusion, gigawatts of existing, shovel-ready capacity sit idle due to infrastructure bottlenecks.
Peak operates at the intersection of these challenges.
While headlines focus on speculative technologies, we’re focused on the work that determines whether energy actually flows:
- Designing and building new substations
- Expanding and modernizing existing facilities
- Overcoming interconnection constraints
- Navigating equipment shortages and scheduling risks
- Delivering projects that unlock capacity now — not decades from now.
We don’t compete with future innovation. We enable it. By addressing today’s substation backlogs, transformer constraints and interconnection challenges, we help utilities and developers deliver the energy they already have — and prepare for whatever comes next.
How can we help you meet your current and future demands?
Call us any time to learn more!
Jason Harris:
205-807-0414 | jharris@peaksubstation.com