How to protect your business from capacity charge surges

The fast answer: Capacity charges are climbing toward record highs in 2026, with PJM's clearing price hitting $329.17/MW-day for the 2026/2027 delivery year and $333.44/MW-day for 2027/2028. Businesses can protect themselves by reducing their Peak Load Contribution (PLC) — the demand their site places on the grid during the 5 highest peak hours of the year. Automated peak shaving, load shifting, and multi-site energy coordination can cut capacity charges by 15–35%.

Your electricity bill is about to look very different. The line item most operators ignore — capacity charges — is surging across PJM, ISO-NE, and NYISO territory, and the increase is not a blip. Tightening grid margins, retiring fossil generation, and an unprecedented data center build-out have pushed capacity prices to record territory two auctions in a row. For many commercial customers, capacity-related charges already represent 20–30% of the total electric bill, and that share is growing.

If you run a small fleet, manage a portfolio of properties, or operate a multi-site SMB, this is the single biggest controllable cost on your power bill. The good news: capacity charge increase business protection is one of the few areas where software can deliver measurable savings without changing how your business operates. This guide explains what's driving the surge, how the charges are calculated, and exactly what you can do to shield your margins.

What is a capacity charge?

A capacity charge is a fee on your commercial electric bill that pays for the grid's ability to deliver power during periods of highest demand. It's not based on how many kilowatt-hours you consume; it's based on how much demand your facility places on the grid during specific peak hours that the grid operator identifies each year.

Think of it as paying for a reserved seat at the grid's busiest moments. Power plants, transmission lines, and distribution infrastructure all have to be sized for the worst-case hour of the year. Capacity markets — run by regional grid operators like PJM, ISO-NE, NYISO, ERCOT, and MISO — auction off the obligation to be available during those hours. The clearing price flows down to your bill as a capacity charge, weighted by your facility's contribution to peak demand.

Capacity charge vs. demand charge: what's the difference?

These terms get used interchangeably, but they're distinct.

• Demand charge is set by your local utility, billed monthly, and based on your facility's highest 15- or 30-minute kW demand within the billing cycle.

• Capacity charge is set by the regional grid operator's annual auction, billed throughout the year, and based on your demand during the grid's coincident peak hours — typically 5 hours across the previous summer.

Both reward the same behavior — keeping demand low at the right moments — but they operate on different clocks and pay for different parts of the system. Reducing one usually reduces the other, which is why integrated energy management is far more effective than tackling either in isolation.

Why capacity charges are surging in 2026

The 2026/2027 PJM base residual auction cleared at $329.17/MW-day, a record at the time and a sharp jump from $269.92/MW-day for 2025/2026. The 2027/2028 auction then cleared even higher at $333.44/MW-day, hitting the price cap. PJM's own estimates suggest these results will translate into a 1.5–5% increase in retail electricity prices across its 13-state footprint — but for customers who are billed on a pass-through capacity basis, the effective increase on their capacity line item is far steeper.

Four structural forces are pushing prices up, and none of them reverse quickly:

1. Data center and AI demand. Hyperscale data centers are now the single largest source of new electric load in North America. Forecasts show data center electricity consumption potentially doubling by 2030. This load is concentrated in PJM's mid-Atlantic zones, which is why those regions saw the biggest auction jumps.

2. Retirement of dispatchable generation. Coal and older gas plants are retiring faster than new generation can be interconnected. Interconnection queues for new solar, wind, and storage now stretch 12–36 months in many regions, leaving capacity supply tight.

3. Electrification of transport and heat. EV adoption, heat pump installations, and industrial electrification are pushing baseline demand higher year over year.

4. Transmission constraints. Even where generation exists, congested transmission lines limit how much of it can reach demand centers, raising locational capacity prices in constrained zones.

The takeaway: capacity charge increases are not a one-year shock you can wait out. They're a multi-year repricing of grid scarcity, and the businesses that protect their margins early will compound that advantage every year the trend continues.

How your capacity charge is actually calculated

In PJM territory, every commercial account has a Peak Load Contribution (PLC) — sometimes called a capacity tag. Your local distribution company calculates your PLC by averaging your facility's demand during the 5 highest coincident peak hours of the prior summer (June through September). That single number is then multiplied by the capacity auction clearing price to determine your capacity charge for the next 12 months.

A simplified example:

• Your facility averaged 500 kW during the 5 PJM coincident peaks last summer.

• The 2026/2027 capacity auction cleared at $329.17/MW-day (or $0.32917/kW-day).

• Your annual capacity charge is roughly: 500 kW × $0.32917 × 365 days = ~$60,000/year.

Now imagine you cut that average peak demand to 350 kW through smart load management. Your annual capacity bill drops to roughly $42,000 — a $18,000 saving locked in for the next year, with no change in how much electricity you actually consume.

This is the leverage point. Your capacity charge is a function of behavior on a handful of hours per year, not your annual energy use. Get those hours right and you protect your bill for the next 12 months.

How to protect your business from capacity charge surges

The playbook for capacity charge protection has six layers. Most SMBs run only one or two of them and leave the rest of the savings on the table. The businesses that capture the full 15–35% reduction stack all six and let software coordinate them.

1. Forecast and predict peak event days

Peak hours in summer-peaking regions almost always fall on a small number of hot weekday afternoons between 2 PM and 6 PM. Grid operators and third-party forecasters publish day-ahead probability scores for likely coincident peak days. Acting on those forecasts — rather than reacting after the fact — is the entire game.

Manual peak alerting works, but it depends on someone receiving the alert, interpreting it, and triggering load reductions across multiple sites in time. That fails the moment the alert lands on a Friday afternoon or while a manager is in a meeting. Automated systems that ingest forecasts and pre-stage load reductions remove that human bottleneck.

2. Peak shave with battery storage

Battery energy storage is the most powerful capacity charge protection tool available, because it lets you cut peak demand without touching production. When the grid hits a likely coincident peak hour, the battery discharges to offset facility load, dropping your metered demand. After the peak passes, the battery recharges during cheap, low-demand hours.

With battery pack prices falling below $100/kWh in 2025–2026, payback periods on commercial storage have compressed from 7–10 years to 3–5 years — and that math gets even better when capacity charge savings are layered on top of arbitrage and demand charge reductions. Peak shaving alone can cut demand charges by 30–60% for a well-sized system.

3. Shift flexible loads out of peak windows

Many commercial loads are flexible without anyone noticing.

• EV charging. Workplace and depot charging can shift to overnight hours.

• HVAC pre-cooling. Buildings can be cooled below setpoint before peak hours, then coast through the peak with reduced compressor runtime.

• Hot water and process heating. Storage tanks can be pre-heated.

• Industrial cycles. Batch processes, compressors, and pumping schedules can be moved.

Each of these is a small lever, but coordinated across a multi-site portfolio, they add up to material PLC reductions. The trick is doing it automatically based on forecasted peak probability, not on a fixed schedule that ignores when peaks actually happen.

4. Coordinate EV charging with the rest of your loads

EV chargers are the biggest new source of peak demand for fleets, depots, and commercial properties — and one of the most controllable. A 50-vehicle depot adding 150–250 kW of charging load during the wrong hour can single-handedly redefine a site's PLC.

Intelligent charging schedules every plug-in around three constraints: vehicle readiness times, real-time tariffs, and grid peak forecasts. The result is that vehicles are still fully charged for shift start, but the charging energy is drawn during low-cost, low-peak hours — and never coincides with the building's HVAC peak. Without coordination, EV charging stations can see energy costs jump 30–70% through demand charges and capacity exposure.

5. Self-consume solar and dispatch batteries during peak hours

If you have rooftop solar or behind-the-meter generation, the value of every kilowatt-hour you self-consume during a peak hour is enormous — it directly reduces your metered demand at the moment that defines your PLC. Routing solar surplus into batteries (rather than exporting it at low feed-in tariffs) and then discharging those batteries during peak hours is the highest-value use of distributed energy assets a commercial customer can pursue.

6. Stack demand response revenue

Most regional grid operators run emergency load response programs that pay customers to reduce load during grid stress events. A single SMB site rarely qualifies for meaningful enrollment, but aggregating flexible capacity across 5–20 sites creates a portfolio big enough to participate. Demand response payments are revenue on top of capacity charge savings — the same load reduction earns twice.

What is Peak Load Contribution and how can businesses reduce it?

Peak Load Contribution (PLC) is the average of your facility's electric demand during the 5 highest grid peak hours of the prior summer. It directly determines your capacity charge for the following 12 months. Businesses reduce PLC by lowering demand during forecasted peak hours through battery dispatch, automated load shifting, EV charging coordination, and HVAC pre-conditioning — typically delivering a 15–35% reduction without operational disruption.

Why automated demand management beats manual approaches

Manual peak management fails for three reasons:

• Speed. Coincident peak windows can be 60 minutes or less. By the time an alert is read and a manager calls each site, the peak has already happened.

• Coordination. A multi-site business cannot have each site make independent peak decisions — one site's reduction can be cancelled out by another site's spike. PLC is calculated per account, but demand response and tariff exposure are often portfolio-wide.

• Consistency. PLC reduction has to land on the right 5 hours. A great reduction on a non-peak day doesn't help. Software that ingests grid operator forecasts and acts on probability outperforms human judgment over a full season.

This is exactly the gap SortGrid, an AI-powered energy management platform for small and mid-sized businesses, was built to close. SortGrid connects to existing EV chargers, solar inverters, batteries, heat pumps, and HVAC systems — no new hardware required — and coordinates them across every site from a single dashboard. When peak forecasts arrive, it pre-cools buildings, throttles non-urgent EV charging, dispatches stored energy, and shifts flexible loads automatically, so capacity-relevant hours are protected without anyone in the business having to react.

For businesses comparing options, enterprise platforms like Schneider Electric's EcoStruxure, Honeywell Forge, or ABB Ability handle this kind of coordination but are built for utilities and large corporates — long deployments, six-figure contracts, dedicated IT staff. Pure-play EV charging tools like ChargePoint, Driivz, and Volteum optimize charging but don't coordinate with HVAC or storage. SortGrid sits in the gap: enterprise-grade orchestration with SMB simplicity, deployed in minutes per site.

How much can a small business actually save on capacity charges?

A typical multi-site SMB with 200–800 kW of peak demand can expect 15–35% lower capacity charges within the first full PLC cycle after deploying automated demand management. For a business paying $50,000–$150,000 a year in capacity-related charges, that's $7,500–$52,500 in annual savings — usually with a payback of under 12 months when storage isn't involved, and 3–5 years when batteries are part of the stack.

A worked example: a 12-site service fleet

Consider a service business running 12 depots in PJM territory, each with:

• 8–15 light-duty EVs (~120 kW of charging capacity per site)

• A 30 kW rooftop solar system

• Standard HVAC and lighting loads peaking around 80 kW per site

Without coordination, the depots routinely peak between 180 kW and 220 kW on summer afternoons as EVs plug in for opportunity charging while HVAC loads are still ramping. Across 12 sites, that's roughly 2.4 MW of coincident peak exposure.

After deploying automated demand management:

• EV charging shifts to overnight and midday solar windows.

• HVAC pre-cools between 11 AM and 1 PM.

• Batteries discharge during forecasted peak hours.

• Site peak demand drops to 120–140 kW.

Portfolio peak demand falls from 2.4 MW to roughly 1.5 MW. At the 2026/2027 PJM clearing price, that's an annual capacity charge reduction of approximately $108,000 — before counting the demand charge savings, dynamic tariff arbitrage, and avoided grid upgrade costs that come with the same setup.

What to do this quarter

If you take nothing else from this guide, run this checklist before the next summer peak season:

1. Pull your last 12 months of interval meter data for every site and identify your top demand hours. If you don't have interval data, ask your supplier — it's available for any commercial half-hourly meter.

2. Confirm your current PLC with your local distribution company or supplier. Many SMBs don't even know the number that defines their capacity bill.

3. Map flexible loads. EV chargers, HVAC, hot water, batteries, and any deferrable industrial cycles. Anything that can shift by 60–120 minutes is leverage.

4. Subscribe to a peak forecast service or use an energy management platform that includes one.

5. Pilot automation on one site before rolling out portfolio-wide. The first site validates savings; the next 10 multiply them.

Capacity charges aren't going back down anytime soon. The grid is getting tighter, data centers are getting hungrier, and every auction cycle is repricing scarcity into your bill. Businesses that treat capacity as a controllable line item — not a fixed cost — will quietly outperform their competitors on energy spend year after year.

If your team is tired of manually juggling EV chargers, solar panels, batteries, and HVAC across multiple sites — hoping you don't get caught on the wrong side of a peak hour — SortGrid automates capacity charge protection from a single dashboard, so every site stays below peak when it matters most, and your capacity bill stops surprising you.