What is 4CP and how can Texas businesses reduce 4CP charges?

Four‑coincident‑peak (4CP) transmission charges are a major driver of electricity costs for Texas commercial and industrial (C&I) customers, and they can be managed with data‑driven load shaping, demand‑response participation, and strategic contract choices. ERCOT determines the four summer peak intervals each year, and a customer’s share of demand during those 15‑minute windows sets the next‑year transmission allocation. Reducing that share—whether through predictive forecasting, automated curtailment, or shifting processes to off‑peak hours—directly lowers the annual 4CP bill.

In practice, the 4CP charge appears on the monthly invoice from the transmission‑distributing service provider (TDSP) as a per‑kilowatt (kW) fee, typically ranging from $15 to $25 per kW annually. For a facility with a 500 kW peak demand, the 4CP component can add $7,500‑$12,500 to the yearly electricity expense. Because the charge is based on a site’s contribution to the system‑wide coincident peaks, even modest reductions in peak‑interval demand can produce meaningful savings.

How ERCOT Calculates 4CP

Identifying the four summer peaks

ERCOT’s nodal market tracks system demand in 15‑minute intervals. During the summer months of June through September, the operator isolates the four intervals with the highest total load across the ERCOT footprint. These intervals are the "four coincident peaks" and are published after the summer season ends. The intervals are not tied to a specific calendar date; they shift each year based on weather, generation availability, and overall consumption patterns.

Allocating costs to customers

Each TDSP (Oncor, CenterPoint, AEP Texas, TNMP) calculates a customer’s 4CP share by summing the customer’s metered demand in megawatts (MW) for each of the four identified intervals and dividing by the total system demand for those intervals. The resulting percentage is multiplied by the TDSP’s 4CP transmission tariff, expressed in $/kW‑yr, to produce the annual charge. The charge is then prorated across the twelve monthly invoices. Because the calculation uses actual metered demand, any load that can be shifted or curtailed during those intervals reduces the allocation linearly.

Why 4CP Matters for Your Bottom Line

The 4CP component can represent 10‑20 % of a C&I electricity bill in high‑growth Texas markets. For a typical manufacturing plant with a 1 MW peak, a $20/kW‑yr 4CP rate adds $20,000 to the annual cost. When you multiply that by the 8,000+ business customers UPG serves, the aggregate impact exceeds $160 M nationwide. Reducing 4CP exposure therefore aligns directly with the $3.2 M UPG saves for clients each year.

Strategies to Reduce 4CP Charges

Predictive load modeling

Accurate forecasting of the four peak intervals is the foundation of any reduction plan. UPG’s free Energy Health Check includes a TDSP delivery‑charge audit and a 15‑minute interval demand analysis that identifies when a site is most likely to appear in the 4CP windows. By overlaying weather forecasts, production schedules, and historical load profiles, businesses can anticipate peak‑interval demand and plan adjustments in advance.

Shifting load off‑peak

Process scheduling, thermal storage, and battery discharge can move discretionary electricity use out of the identified peak windows. For example, a food‑processing plant can pre‑cool product during the early afternoon and run chillers at reduced capacity during the 4CP intervals. The net effect is a lower kW contribution during those critical 15‑minute periods.

Demand response participation

ERCOT’s ancillary services market offers compensation for reducing load on short notice. Enrolling in a qualified demand‑response (DR) program lets a facility receive a payment for curtailing during the four peak intervals while simultaneously lowering its 4CP allocation. UPG’s 30+ top‑tier supplier panel includes several REPs that bundle DR enrollment with fixed‑rate contracts, simplifying participation.

Automatic curtailment during peak intervals

Advanced energy management systems can be programmed to trigger automatic load shedding when the system approaches a 4CP interval. Options include dimming non‑critical lighting, throttling compressors, or dispatching on‑site generation. The operational pain is limited when the curtailment logic is tied to a pre‑approved DR event plan and documented with the TDSP.

Contractual hedging

While 4CP is a transmission charge, the underlying energy price can influence load patterns. Fixed‑rate contracts or block‑and‑index structures lock the energy component, allowing the operations team to focus solely on demand management. UPG’s expertise in structuring these contracts helps ensure that the energy price does not inadvertently drive higher peak demand.

When Chasing 4CP Isn’t Worth It

Not every facility benefits from aggressive 4CP reduction. If a site’s load factor is low (e.g., a data center that runs at 90 % capacity year‑round), the incremental effort to shift a few megawatts during four intervals may cost more in labor, equipment wear, or lost production than the $10‑$15 kW‑yr savings. Similarly, businesses with strict process constraints—continuous furnaces, chemical reactors, or critical HVAC—may find the operational risk outweighs the financial gain. In those cases, focusing on other cost levers such as energy procurement or demand‑charge reduction may deliver a higher return.

How UPG Can Help

United Power Group brings 25 + years of Texas market expertise to the 4CP challenge. Our free Energy Health Check pinpoints the exact 15‑minute intervals where your site contributes to the four coincident peaks and quantifies the potential savings. With a panel of 30 + top‑tier suppliers, we can pair demand‑reduction tactics with up‑to‑27 % spend reduction on energy procurement. Whether you need fixed‑rate contracts, block & index structures, or a customized DR enrollment plan, UPG’s consultants work side‑by‑side with your operations team to implement solutions that protect reliability while trimming the 4CP bill.

Bottom line

4CP charges are a predictable, calculable portion of Texas transmission costs, and they respond directly to a facility’s demand during four summer peak intervals. By leveraging predictive analytics, targeted load shifting, demand‑response participation, and strategic contracting, most C&I customers can reduce their 4CP allocation and improve their overall electricity spend. However, the effort must be weighed against operational constraints; when the cost of curtailment exceeds the potential savings, a more balanced approach that focuses on energy procurement or demand‑charge optimization may be preferable. UPG’s free Energy Health Check and deep ERCOT knowledge provide the roadmap to make that decision with confidence.