The Supply Side: 14 GW of Batteries Changes Everything
Texas has deployed 14 GW of grid-scale battery storage as of March 2026, nearly doubling the 7.8 GW installed in January 2025. This buildout — the fastest in US history — is fundamentally reshaping the ERCOT evening price curve:
- Duck curve flattening: Excess solar generation (now 14% of total ERCOT generation) charges batteries during midday, then discharges during the 6–9 PM evening ramp. This is reducing the frequency of $200+/MWh evening price spikes that characterized summer 2025.
- RTC+B market design: ERCOT’s new Real-Time Co-optimization with Batteries (RTC+B) protocol allows battery operators to bid into both energy and ancillary services simultaneously, improving dispatch efficiency and reducing reserve shortfalls.
- Solar eclipses coal: Solar now permanently exceeds coal as a generation source at 14% of ERCOT output. The era of coal as a baseload price-setter in Texas is effectively over.
The Demand Side: Data Centers Absorb the Gains
The battery buildout is being partially offset by explosive demand growth. ERCOT’s interconnection queue contains 40+ GW of pending data center requests, and the “Batch Zero” priority system announced in March 2026 has only accelerated the urgency.
- 14% demand growth forecast: ERCOT projects load growth of 14% through 2030, driven almost entirely by data center and AI infrastructure expansion.
- Zone-specific congestion: North Texas (Dallas-Fort Worth corridor) and West Texas (Permian Basin) face the highest risk of localized congestion as data center clusters concentrate in specific transmission zones.
- $16B Anderson County megaproject: The proposed 5.2 GW gas-fired facility — if built — would add approximately 6% to total ERCOT capacity, but construction timelines extend beyond 2028.
4CP Transmission Charges: The Hidden Cost Lever
For large commercial and industrial customers, the 4CP (Four Coincident Peak) transmission charge remains the most impactful cost component. Tips from KilowattLogic readers indicate the 4CP article generated 529-second dwell times — a clear signal that sophisticated buyers are deeply engaged in peak avoidance strategies.
- What it is: ERCOT allocates annual transmission costs based on a customer’s demand during the single highest 15-minute interval in each of the four summer months (June, July, August, September).
- Cost magnitude: 4CP charges can represent 15–30% of a large commercial customer’s total electricity bill. A single failed curtailment during a coincident peak can cost tens of thousands of dollars.
- 2026 outlook: With data center demand adding to system peaks and battery discharge potentially shifting the peak window later in the evening, traditional 4CP forecasting models may underperform this summer. Buyers should consider real-time monitoring services.
Price Forecast: Summer 2026
| Scenario | Avg Wholesale ($/MWh) | Peak Hours | Probability |
|---|---|---|---|
| Mild Summer + Storage Works | $35–$45 | $80–$120 | 30% |
| Normal Summer | $50–$65 | $150–$300 | 45% |
| Heat Wave + Outages | $75–$100 | $1,000–$5,000 | 25% |
Action Items for Texas Commercial Buyers
- Lock summer hedges now: Forward prices for June–August ERCOT North are trading at a 15% premium to March spot. Buyers with unhedged summer exposure should evaluate fixed-price contracts before April weather forecasts narrow the range.
- Deploy 4CP monitoring: Install real-time demand monitoring and automated curtailment systems before June 1. A single avoided 4CP event can save $10,000–$50,000 for a large commercial facility.
- Evaluate demand response: ERCOT’s growing need for flexible load creates significant revenue potential. Facilities that can curtail 1+ MW during grid stress events can earn $50–$150/MWh in real-time pricing spreads.
- Watch the Batch Zero timeline: The first wave of data center interconnections under the Batch Zero framework will impact localized transmission costs. Monitor announcements from ERCOT for zone-specific impacts to your delivery charges.
Source: ERCOT Capacity, Demand \u0026 Reserves Report (CDR); EIA Electric Power Monthly; ERCOT Batch Zero Framework; KilowattLogic Market Intelligence.