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Colorado County, Texas: solar, wind, and storage projects and permits

Queue data as of ERCOT's September 2026 GIS report · Contacts checked 2026-09-26 · Next update early next month

14 proposed energy projects from ERCOT's September 2026 report, plus who to call in Colorado County and in TCEQ Region 12 before signing a solar, wind, or battery storage lease.

Check land in Colorado CountyOpens the land report with the map on the county; click a spot for its flood, wetland, habitat, line-distance and parcel check.

Power reliability here: minutes without power per year, outages per year, and outage length for Colorado County, 2013–2024, from the serving utilities' EIA filings.

What energy projects are proposed in Colorado County?

ERCOT's September 2026 interconnection report lists 14 proposed energy projects in Colorado County (3 solar, 10 battery storage and 1 gas), about 1,784 MW in all. 4 of the 14 have a signed interconnection agreement.

What stands out in Colorado County

By capacity, battery storage leads in Colorado County with 1,268 MW across 10 projects, followed by solar (3 projects, 394 MW) and gas (1 project, 122 MW). The largest single project is Altair Energy Storage, a 202 MW stand-alone battery storage project listed under Altair Energy Storage, still in study, and its target online date is Mar 2030. Of the 14, 10 are still in ERCOT's study process, 1 has a signed interconnection agreement but no security posted yet and 3 have posted security or started construction. Connection points are mostly at 138 kV (10 projects) and 47 kV (2 projects) (why the voltage matters). Adapture Solar Development, Firefly Fields Energy Center LLC and Harrison Street Development, LLC are each listed on 2 projects; 11 different companies appear in all. Target online dates for the projects not yet running span Nov 2026 to Oct 2030. All of them fall in ERCOT's South load zone. 2 that were listed in August have since dropped off.

A listing is a request to study a grid connection, not a built project; the stage column says how far each one has gone.

Stage, most advanced first: Approved for synchronization (first power) · Approved for energization (backfeed) · Under construction · Signed; security posted (interconnection agreement signed and financial security posted) · Signed (agreement signed, security not yet posted) · In study (screening or full interconnection study, no agreement). A target date that has already passed is marked; ERCOT keeps the developer's last reported date until the developer changes it.

Scroll the table sideways to see every column.

No longer listed since August

These projects were in ERCOT's August interconnection report but are not in its September 2026 report. ERCOT's reports do not say why a project leaves the list.

• Pearl Crescent Solar, solar, 208 MW (RWE Solar Development, LLC)
• Pearl Crescent Storage, battery storage, 50 MW (RWE Solar Development, LLC)

Crowded connection points in Colorado County

Substations and switching stations named by two or more of the county's requests, matched on ERCOT's PSS/E bus number rather than the exact wording, so "60404 SOLSTICE", "AEP Solstice Substation #60404" and a tap off the Solstice line count together. Every request statewide that names the bus is listed; a request on a tap line counts toward both ends. Sharing a bus is not the same as sharing a study group, and ERCOT decides the latter.

What the stages and dates mean: how to read ERCOT's report. ERCOT's report lists self-limiting facilities (batteries that limit injection below nameplate) at 0 MW; repowers of existing plants show 0 with no capacity change. "Approved for energization" and "approved for synchronization" are ERCOT's own milestones (backfeed, then first power). "Shared with N other requests" counts active requests anywhere in ERCOT naming the same point of interconnection, matched on ERCOT's exact wording, so a bus written two ways counts as two points. Source: ERCOT Generator Interconnection Status (GIS) Report, September 2026, planning data entered by developers and transmission providers that ERCOT says may contain errors. Parcel & Grid is not affiliated with ERCOT.

Who to contact in Colorado County

• Colorado County appraisal district and tax office: parcel records and agricultural valuation, which a lease can end (directory, Texas Comptroller · rollback taxes).
• TCEQ Region 12, Houston: 5425 Polk St, Ste H, Houston TX 77023-1452, 713-767-3500; spills, 24 hours: 800-832-8224. Handles the construction stormwater permit for sites of 1 acre or more (TCEQ).
• Colorado County judge and commissioners court: road use agreements, tax agreements, and floodplain development permits where the county takes part in the flood insurance program.
• Flood maps: FEMA map search for Colorado County.

Permits and reviews for Colorado County

Texas has no state siting permit for solar or wind, and Texas counties generally have no zoning authority, so a project in Colorado County is shaped by site control, the county road use agreement, tax agreements, and the grid connection (what still applies · the twelve approvals, stage by stage). Wetland, endangered species, historic, and FAA reviews depend on the site: statewide and federal contacts · decommissioning law.

How a project in Colorado County connects to the grid

Colorado County is on the ERCOT grid. The projects listed above are in ERCOT's South load zone. The serving utility handles the connection request. Interconnection by market and utility · what ERCOT is.

How long it takes. ERCOT staff put the connection process at 18 to 30 months for generation of 10 MW or more, before construction or supply delays (ERCOT, Oct. 2024). Across the U.S., the median project built in 2025 took 61 months from interconnection request to commercial operation (Berkeley Lab, Queued Up 2026), so a lease signed today usually means construction years out: timelines by market.

Solar for homes and businesses in Colorado County

Texas rules for rooftop and on-site systems are the same in every county; your electric utility sets the application steps: Texas home and business solar rules · your utility's application links.

Other counties served by TCEQ Region 12

Austin · Brazoria · Chambers · Fort Bend · Galveston · Harris · Liberty · Matagorda · Montgomery · Walker · Waller · Wharton