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Commercial Solar EPC in Texas

Ferrius Energy provides engineering, procurement, and construction for commercial solar, battery storage, and solar farms in Texas, from behind-the-meter systems for industrial facilities to ground-mount projects interconnecting to the ERCOT grid. Texas has no statewide net metering, so project value comes from avoided retail purchases, transmission charge reduction, wholesale market exposure, and long-term offtake contracts rather than from export credits.

That makes Texas a different engineering and financial problem from New England. This page covers how the ERCOT market works for an owner or developer, how retail choice and municipal utilities change the model, where storage earns money, the property tax tools that matter for utility-scale solar, and the design choices Texas hail forces on every project.

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Last reviewed: September 2026. Market rules, tariffs, and tax provisions change; confirm with ERCOT, the PUCT, your utility or retail provider, and the Texas Comptroller before relying on them.

ERCOT: an energy-only market

Most of Texas is served by ERCOT, which operates an energy-only wholesale market. There is no capacity market paying generators to be available. Generators earn revenue by selling energy (and ancillary services) when they run, and scarcity pricing during tight conditions is what signals new investment. For solar, this has two consequences.

Midday prices are soft. With large amounts of solar on the ERCOT system, wholesale prices during peak solar hours are frequently low. A merchant solar project captures less than the average price, which is why most utility-scale projects are underwritten on a PPA or hedge.
Evening scarcity is valuable. The expensive hours have shifted toward late afternoon and evening as solar output falls. Pairing solar with storage to move energy into those hours is the core design question for Texas projects today.

For a commercial or industrial owner, the energy-only design shows up in retail contracts and in exposure to indexed pricing, which is why load profile and contract structure matter more here than a simple rate-times-kWh calculation.

Market Structure

Retail choice vs. municipal utilities and co-ops

Where you are in Texas determines how on-site solar is valued. There is no statewide net metering rule, so each path works differently.

Competitive (deregulated) areas

In areas served by transmission and distribution utilities such as Oncor, CenterPoint, AEP Texas, and TNMP, you buy energy from a retail electric provider. Export compensation, if any, depends on your retail contract, not on a tariff. Solar value is mostly the avoided energy and delivery charges on consumption behind the meter.

Austin Energy

The municipally owned utility sets its own commercial solar and interconnection policies, including its own crediting approach for commercial systems. Confirm the current commercial program and rider terms with Austin Energy before sizing.

CPS Energy (San Antonio)

CPS Energy also sets its own interconnection and export terms as a municipal utility. Program availability has changed over time, so we pull the current rules at feasibility.

Electric cooperatives

Rural co-ops each publish their own distributed generation policies. Export compensation ranges from avoided cost to other structures, and some limit system size relative to load.

The common thread: in Texas we size behind-the-meter systems to self-consumption, and treat exports as a small upside unless a specific contract says otherwise.

4CP transmission charges and commercial battery storage

For larger commercial and industrial customers in the competitive ERCOT areas, a significant share of transmission cost is allocated using the 4 Coincident Peak (4CP) method. Your demand during the single 15-minute interval of ERCOT system peak in each of June, July, August, and September sets your transmission charges for the following year. Missing one of those four intervals costs a full year of higher charges.

Solar helps less than people expect here, because the ERCOT summer peak increasingly lands in the early evening when solar output is falling. Commercial battery storage is the better tool: a battery dispatched during likely 4CP intervals can cut the demand ERCOT sees from your meter, and the same asset can be used for demand charge management and for backup.

Check eligibility first. 4CP allocation applies to specific rate classes (generally larger, interval-metered accounts). Confirm with your TDU tariff before modeling.
Size duration to the event. Operators do not know in advance which interval will be the peak, so storage is dispatched across several candidate hours on high-load days. That affects energy capacity, not just power rating.
Stack revenue carefully. Wholesale arbitrage or ancillary service participation can compete with 4CP dispatch on the same afternoons.

Our commercial BESS cost and ROI guide covers how we build these models, and reducing peak demand charges covers the distribution-level demand side.

Utility-scale solar and solar farm EPC in Texas

Texas has land, a large grid, and fast-growing load, which is why it leads the country in new utility-scale solar and storage. As a solar farm EPC contractor, our role is delivering a bankable project: geotechnical and hydrology work, pile and tracker design, collection system and substation engineering, and a construction schedule that lenders and tax equity can underwrite. The standards we apply are described in what makes a solar farm EPC bankable.

Interconnection: ERCOT GINR

Larger generation and storage projects connecting to the ERCOT transmission system go through ERCOT's Generation Interconnection or Change Request (GINR) process, with studies performed by ERCOT and the interconnecting transmission service provider. Smaller distribution-connected resources follow the TDU's distributed generation process. The GINR queue is large, and study results drive both schedule and network upgrade cost, so we engage on interconnection early in development rather than after design is complete.

Offtake and PPAs

Because merchant midday prices are weak, most Texas utility-scale projects are financed on a power purchase agreement, virtual PPA, or hedge with a corporate buyer or utility. Contract settlement point, shape (fixed-shape vs. as-generated), and basis risk between the project node and the hub all feed the EPC design, for example in the choice between fixed tilt and single-axis tracking, and the size of co-located storage.

Landowners and developers

If you own land and are evaluating a lease, see our guide to leasing land for a solar farm. If you are developing a project, our solar farm development guide lays out the sequence from site control to notice to proceed.

2025 legislative session

During the 2025 session the Texas Senate passed several bills that would have constrained renewable development, including SB 819 (added permitting and fees for wind and solar), SB 388 (dispatchable generation requirements), and SB 715 (backup requirements for renewables). None of these passed the House. A bill on end-of-life handling of solar and wind equipment did advance. Legislative risk remains a diligence item for Texas projects; confirm current law with counsel.

Tax Treatment

Texas property tax: 11.27, Chapter 312, and what expired

Texas has no personal income tax, so state incentives for solar come through the property tax system. Which tool applies depends on whether the system serves on-site load or sells to the grid.

Tax Code 11.27

Exempts the value added by a solar or wind-powered energy device installed primarily for production and distribution of energy for on-site use. It fits behind-the-meter commercial systems. The owner applies to the county appraisal district using Comptroller Form 50-123.

Chapter 312 abatements

Utility-scale projects selling to the grid generally negotiate tax abatement agreements with the county (and sometimes a city) under Tax Code Chapter 312 within a designated reinvestment zone. Terms are local and negotiated.

Chapter 313 expired

School district value limitation agreements under Chapter 313 expired at the end of 2022 and are no longer available for new projects.

JETI excludes solar

The replacement program, the Jobs, Energy, Technology and Innovation Act (Government Code Chapter 403), covers manufacturing and dispatchable generation. The Comptroller's guidance indicates solar and other non-dispatchable generation are not eligible.

On the federal side, the same rules apply as everywhere: Section 48E at a 6% base credit, 30% for projects under 1 MW AC or that meet prevailing wage and apprenticeship. Solar projects that began construction on or before July 4, 2026 are not subject to the 2027 placed-in-service deadline (subject to continuity rules); those beginning after must be placed in service by December 31, 2027. Add 5-year MACRS with 100% bonus depreciation, made permanent in 2025. See our federal ITC guide and financing options.

Designing for Texas hail and heat

Hail is the weather risk that most affects Texas solar, and severe hail events have caused large losses at utility-scale sites. It is an engineering and insurance question, not only a module datasheet line.

Module selection. Glass thickness and construction (glass-glass vs. glass-backsheet) and third-party hail test ratings are compared on a site-specific hail exposure basis.
Tracker hail stow. Single-axis trackers can be commanded to a steep stow angle when hail is forecast, which reduces impact energy on the glass. The control logic, forecast trigger, and backup power for stow need to be specified and tested.
Insurance alignment. Insurers and lenders increasingly ask for hail mitigation plans. Designing to their expectations early avoids a financing surprise.
Heat. High ambient temperatures reduce module output and stress inverters and batteries, which affects string sizing, inverter derating, and BESS thermal management.

For commercial rooftop systems, the same thinking applies at smaller scale, along with roof condition and wind design. Our commercial solar EPC service covers the full process, and the operations and maintenance scope includes post-storm inspections.

Questions

Frequently asked questions

Does Texas have net metering for commercial solar?

No, there is no statewide net metering rule. In competitive ERCOT areas, export compensation depends on your retail electric provider contract. Municipal utilities such as Austin Energy and CPS Energy, and electric cooperatives, set their own policies. Most commercial systems in Texas are sized for on-site consumption.

What is 4CP and how does battery storage help?

4CP allocates transmission costs to eligible larger customers based on their demand during the ERCOT system peak interval in each of June, July, August, and September. A battery discharged during likely peak intervals reduces that demand and the following year's transmission charges.

Is commercial solar exempt from property tax in Texas?

Tax Code Section 11.27 exempts the value of a solar energy device installed primarily for on-site use, claimed with Comptroller Form 50-123. Utility-scale projects that sell to the grid generally rely on Chapter 312 abatement agreements with local taxing units instead.

Can a Texas solar farm use Chapter 313 or JETI?

Chapter 313 expired at the end of 2022. The JETI program that replaced it covers manufacturing and dispatchable generation, and the Comptroller's guidance indicates solar is not eligible. Chapter 312 abatements remain the main local tool.

How do Texas solar farms deal with hail?

Through module selection based on hail test ratings and glass construction, tracker hail stow that tilts modules steeply ahead of forecast hail, and insurance-aligned mitigation plans. These are specified during engineering, not added after construction.

Sources

ERCOT, Generation Interconnection and Resource Integration. ercot.com
ERCOT, Four Coincident Peak calculations. ercot.com
Texas Tax Code, Section 11.27, Solar and Wind-Powered Energy Devices. texas.public.law
Texas Comptroller, Jobs, Energy, Technology and Innovation Act (JETI) FAQ. comptroller.texas.gov
Texas Comptroller, Chapter 312 Tax Abatement. comptroller.texas.gov
pv magazine USA, Anti-solar bills die in Texas House (May 28, 2025). pv-magazine-usa.com
Vinson & Elkins, Texas Renewables Roundup: 2025 Texas Legislature Update. velaw.com
Internal Revenue Service, Clean Electricity Investment Credit (Section 48E). irs.gov

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