Pennsylvania is entering a new electricity era, and data centers are a big reason why. This guide explains how Pennsylvania data centers, the PJM grid and your electric bill connect — and what you can control.
For years, power demand across much of the Northeast and Mid-Atlantic grew fairly slowly.
Now that is changing.
Artificial intelligence (AI), cloud computing and giant “hyperscale” computer centers need huge amounts of power. They are creating enormous new demand across the PJM grid.
Pennsylvania is part of PJM. So homeowners here can be affected even when the newest data center is not in their hometown.
That raises an obvious question
“Are data centers making my electric bill more expensive?”
They are contributing to regional electricity-cost pressure, but they are not the only factor affecting your bill.
Pennsylvania Is Part of PJM
Most Pennsylvania homeowners get power from utilities such as PECO, PPL Electric, FirstEnergy utilities and Duquesne Light.
But behind those local utilities sits a much larger regional power system.
Pennsylvania is part of PJM Interconnection. PJM runs the high-voltage grid across all or parts of 13 states and the District of Columbia.
PJM runs wholesale power markets, transmission planning, grid reliability and capacity markets.
So demand growth in Virginia, Ohio, Pennsylvania or elsewhere in PJM can affect market conditions across the whole region.
PJM Says Data Centers Are the Primary Driver of New Demand
This is not speculation.
In June 2026, PJM said directly that data centers are the primary driver of current growth in power demand.
PJM also warned that new data centers can be built two to three times faster than many of the power plants needed to serve them.
That creates a simple supply-and-demand problem.
Power demand is rising quickly.
New power supply is not arriving as quickly.
When that happens, the cost of keeping enough power plants available can rise.
What Is PJM's Capacity Market?
Your electric bill is not only paying for the power you use right now.
The regional grid also has to keep enough power plants ready to meet future peak demand. (Peak demand is the time when the most power is needed, such as a heat wave.)
PJM does that partly through its Reliability Pricing Model, also called the capacity market.
The capacity market pays qualifying power sources to be available when needed.
Its purpose is to make sure enough power supply exists to meet expected future demand.
That capacity has a price.
And recently, that price has become a major affordability issue.
Why Data Centers Push Capacity Costs Higher
Imagine PJM expects the region to need 150,000 MW during a future peak period.
Now add large new data centers.
The expected peak rises.
PJM now needs to line up more available generation.
If there is not enough extra supply, power plants become more valuable, and capacity prices rise.
That does not mean a data center gets its own separate line item on your PECO bill.
The effect is indirect: more regional demand → tighter supply → higher capacity costs → higher electricity-supply costs.
PJM Says Demand Is Growing Faster Than Supply
PJM has been more and more direct about this problem.
A May 2026 PJM market-design paper described an unprecedented surge in demand driven by data centers. It also pointed to faster power-plant closures and supply-chain limits on new generation.
PJM's 2026 long-term forecast projects summer peak demand growing about 3.6% per year over the next 10 years. Over the next 20 years, it projects about 2.4% per year.
PJM now projects summer peak demand could grow by roughly 66 GW over the next 10 years. That would reach about 222 GW by 2036.
For context, 66 GW is an enormous amount of new demand.
Data Centers Are Already a Significant PJM Load
By one estimate, data-center load made up about 9% of PJM's wholesale power costs in the first seven months of 2026.
And unlike many household loads, data centers run fairly steadily.
PJM says more than 90% of data-center load can be continuous.
That matters because the grid cannot simply count on those sites using less power at night.
They can need large amounts of power almost all the time.
Why Pennsylvania Homeowners Should Care Even If the Data Center Is in Virginia
This is one of the most important points.
PJM is a regional market.
Picture a massive new data center in Northern Virginia. It can add to regional capacity needs and new transmission needs. It can also increase competition for power plants and push up market prices.
Those effects do not stop at a state border.
So Pennsylvania homeowners can feel regional market pressure even when the new load is built elsewhere.
Pennsylvania Data Centers Are Growing Too
Pennsylvania itself is becoming more attractive for data centers. It offers available industrial land and existing transmission lines. It is close to East Coast cities and has PJM access. It also has natural-gas resources and major fiber-optic corridors.
So future demand growth may come from both regional data centers and new projects inside Pennsylvania.
So Are Data Centers Raising PECO or PPL Bills?
Possibly, through the supply side — but we need to be precise.
A Pennsylvania electric bill usually has two major pieces.
Delivery. The local utility charges for poles, wires, substations and local grid service.
Supply. The cost of the actual electricity and related wholesale-market products.
Capacity pressure from data centers ties more directly to the supply side and the regional market. It ties less directly to the local wires serving your house.
That distinction matters.
Pennsylvania Homeowners Have Electricity Choice
Pennsylvania also has a competitive electricity-supply market.
Homeowners may get supply through their utility's default service or from a competing electricity supplier.
Pennsylvania Power Switch lets customers compare available retail electricity offers.
That gives households more flexibility than customers in states where only the utility can sell power.
But retail suppliers still operate inside the same broader PJM market.
They cannot fully escape regional wholesale costs.
Capacity Costs Are Already a Major Political Issue
PJM capacity prices have become so important that Pennsylvania Governor Josh Shapiro has repeatedly challenged the market structure.
Pennsylvania's settlement with PJM capped capacity prices, and in early 2026 the cap was extended through 2030. In July 2026, the state said the cap prevented an extra $13.3 billion in regional consumer costs. That was in the latest capacity auction, for the 2028/2029 delivery year.
The state says its actions are expected to produce about $45 billion in total regional savings over multiple capacity years. That is compared with uncapped outcomes.
That shows homeowners just how large the capacity-market issue has become.
Does That $45 Billion Mean Pennsylvania Bills Are Falling?
Not necessarily.
That figure is an estimate of costs avoided. It compares against what prices could have been under a different auction outcome.
It does not mean every household will get a check or see its bill drop by a set amount.
Electricity prices still depend on supply contracts, fuel, capacity, transmission, weather, utility rates and household usage.
The key point is that capacity prices are now large enough to trigger major state action.
PJM Is Working on Special Rules for Large Loads
PJM is also changing its own market structure because of data-center growth.
In July 2026, PJM's Board approved filing a Reliability Backstop Procurement with federal regulators. It also approved new rules for connecting data centers and other large loads when there is not enough capacity to serve them.
The goal is to connect large new customers without hurting reliability. PJM's Board said new large loads should bear the costs they cause. It also noted that states will play an essential role in deciding how those costs reach individual customers.
That is similar to what states such as Virginia and Ohio are already trying to do.
The principle is: if a giant new load creates a need for new resources, that load should bear more of the cost.
Why This Matters for Pennsylvania
Pennsylvania homeowners are caught between two competing forces.
Demand is rising. Data centers are adding major new power needs.
Supply is limited. New power plants take years to permit, finance, connect to the grid and build.
That mismatch creates price pressure.
The faster the region can add new power sources, the better the chance of keeping long-term costs under control.
Could Pennsylvania Benefit From Data Center Growth?
Yes.
Data centers can bring construction spending, property-tax revenue, tech investment, new infrastructure, jobs and demand for new generation.
Large customers can also help spread fixed grid costs if they are properly charged for the infrastructure they need.
The issue is not that data centers are bad by nature.
The issue is: who pays for the electricity system needed to serve them?
Could Data Centers Help With Reliability?
Possibly.
Some AI and computing work may someday become flexible. A data center could then cut demand for a while, shift computing to other times or use onsite generation. It could also draw from batteries or respond to grid emergencies.
PJM has said the potential flexibility of AI-driven data-center loads deserves further study.
If that flexibility becomes real and measurable, data centers could someday help balance the grid instead of acting only as fixed demand.
What Can a Pennsylvania Homeowner Actually Control?
You cannot control PJM capacity auctions, data-center development, power-plant closures, regional transmission or wholesale power prices.
But you can control how much electricity your home needs to buy.
Step 1: Understand Your Electric Supply Rate
First, know your utility, your generation supplier and your current cents-per-kWh rate. Also know when your contract ends, whether pricing is fixed or variable, and any early termination terms.
Pennsylvania's competitive market makes this especially important.
A poor supply contract can sometimes cost a household more than an efficiency problem.
Step 2: Review Household Consumption
Look at about 12 months of usage.
Ask:
- Is summer AC driving the bill?
- Is winter electric heating high?
- Has annual usage increased?
- Did you add an EV?
- Is the heat pump using excessive backup heat?
Your bill is roughly electricity price × electricity consumption, plus delivery and other charges.
You should understand both sides.
Step 3: Reduce Unnecessary Demand
Pennsylvania homes may waste power through aging HVAC equipment, thin attic insulation, air leaks, leaky ducts, electric resistance heat and inefficient water heaters.
Suppose a household uses 16,000 kWh per year. Efficiency upgrades cut usage to 12,500 kWh.
That is 3,500 fewer kilowatt-hours exposed to future electricity prices.
Step 4: Evaluate Solar
Pennsylvania homeowners can also consider rooftop solar.
Qualifying projects may cut grid purchases. They may also take part in Pennsylvania net metering (credit for extra solar power you send to the grid) and SREC markets.
Pennsylvania's current net-metering rules remain fairly favorable for qualifying systems.
So solar can be a real tool for reducing how much power you buy.
But it still has to make sense based on roof exposure, utility, system cost, financing and expected production.
Step 5: Evaluate HVAC Before Oversizing Solar
Pennsylvania has both hot summers and cold winters.
An old heat pump or inefficient electric heating system can skew yearly power use.
Suppose annual use is 18,000 kWh. After HVAC and insulation improvements, 14,000 kWh.
Now the right solar system may be much smaller.
Fix the load. Then decide how to power it.
Step 6: Consider Battery Storage for Resilience
Battery storage can help protect critical loads during storm outages, ice, wind and local utility failures.
Important loads might include the sump pump, well pump, refrigerator, furnace controls, internet and medical equipment.
A battery does not solve PJM capacity pricing.
It solves a different homeowner problem: having electricity available when the grid does not.
Should Pennsylvania Homeowners Be Worried About Data Centers?
They should pay attention.
PJM itself says data centers are now the primary driver of growth in power demand.
That demand is adding to a tighter regional market.
And a tighter market can mean higher capacity and supply costs.
But it would still be wrong to say “your electric bill went up because of data centers.”
The real system is more complicated.
The Better Question Is About Exposure
You cannot control PJM's future power demand.
You can control how much electricity your home needs to buy from that system.
That may mean choosing a better electricity supplier, upgrading HVAC, improving insulation, installing solar or adding battery storage.
The Ashborn Approach
Ashborn Partners helps Pennsylvania homeowners review solar, HVAC, battery storage and whole-home energy efficiency in one personalized home-energy review.
We do not need to predict exactly what the next PJM auction will do.
We help homeowners understand what they can control today.
You can't control PJM demand. You can control your home's energy strategy.