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Maverick 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

7 proposed energy projects from ERCOT's September 2026 report, plus who to call in Maverick County and in TCEQ Region 16 before signing a solar, wind, or battery storage lease.

Check land in Maverick 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 Maverick County, 2013–2024, from the serving utilities' EIA filings.

What energy projects are proposed in Maverick County?

ERCOT's September 2026 interconnection report lists 7 proposed energy projects in Maverick County (2 solar and 5 battery storage), about 1,498 MW in all. 4 of the 7 have a signed interconnection agreement.

What stands out in Maverick County

By capacity, battery storage leads in Maverick County with 988 MW across 5 projects, followed by solar (2 projects, 510 MW). The largest single project is Senator Aggreko Solar, a 259 MW solar project listed under Senator Aggreko Solar LLC, with an interconnection agreement signed in Dec 2025, and its target online date is Mar 2029. Of the 7, 3 are still in ERCOT's study process, 2 have a signed interconnection agreement but no security posted yet and 2 have posted security or started construction. Every listed connection point is on the 138 kV system (why the voltage matters). Sugaree Solar LLC is listed on the most projects here (2 of 7); 6 different companies appear in all. Target online dates for the projects not yet running span Dec 2027 to Jun 2030. All of them fall in ERCOT's South load zone.

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.

Crowded connection points in Maverick 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 Maverick County

• Maverick County appraisal district and tax office: parcel records and agricultural valuation, which a lease can end (directory, Texas Comptroller · rollback taxes).
• TCEQ Region 16, Laredo: 707 E Calton Rd, Ste 304, Laredo TX 78041-3887, 956-791-6611; spills, 24 hours: 800-832-8224. Handles the construction stormwater permit for sites of 1 acre or more (TCEQ).
• Maverick 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 Maverick County.

Permits and reviews for Maverick County

Texas has no state siting permit for solar or wind, and Texas counties generally have no zoning authority, so a project in Maverick 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 Maverick County connects to the grid

Maverick 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 Maverick 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 16

Dimmit · Duval · Kinney · La Salle · McMullen · Val Verde · Webb · Zapata · Zavala