Candidate land
Land holdings of 50 acres or more that Voltane screens for solar, storage and hybrid projects. Counts only; the sites and their scores are in the map.
| Size | Candidate sites |
|---|---|
| 50 acres and up | 743 |
| 300 acres and up | 379 |
| 500 acres and up | 293 |
Source: TxGIO StratMap Land Parcels 2025 (county appraisal dates Feb to Jul 2025), Voltane processing of 2026-09-29.
These are candidates before Voltane's screening filters (flood, wetlands, protected land, distance to 138 kV) and before any project type is chosen. The map shows how many pass for solar, storage or hybrid.
Transmission and substations
| Voltage class | Line miles in the county | Substations |
|---|---|---|
| 345 kV and above | 0 | 0 |
| 230 kV | 0 | 0 |
| 115 to 161 kV | 53 | 2 |
| 69 kV and below | 97.8 | 9 |
| Voltage not recorded | 0 | 0 |
Source: lines: HIFLD Electric Power Transmission Lines (final release, 2024-09-30) merged with OpenStreetMap (Texas extract, 2026-09-29); substations: OpenStreetMap Texas extract, 2026-09-29.
11 mapped substations in all. A nearby line or substation is a proxy for grid access, not a statement that it can take a new project.
Utilities and grid
Grid: ERCOT, WECC.
- AEP Texas Central Company (ERCOT)
- Medina Electric Co-op, Inc (ERCOT)
- Rio Grande Electric Co-op, Inc (ERCOT / WECC)
Source: HIFLD Electric Retail Service Territories, data year 2022.
ERCOT interconnection queue
6 projects, 692 MW in ERCOT's generation interconnection queue list Zavala County.
| Fuel | Projects | MW |
|---|---|---|
| Battery storage | 4 | 571 |
| Solar | 2 | 121 |
| Status | Projects | MW |
|---|---|---|
| Interconnection agreement signed | 1 | 80 |
| No interconnection agreement yet | 5 | 612 |
Queued MW show where other developers have asked to connect. They are a competition signal, not a measure of grid room, and many queued projects are never built.
Source: ERCOT GIS Report (MIS 15933), August 2026 report, published 2026-09-01.
What this page does not tell you
- How much power any line or substation can take. That takes ERCOT or utility studies.
- Flood, wetland and protected-land shares for the county. Voltane measures those per site, in the map.
- Who owns land here. Voltane publishes no landowner names.
- Local ordinances, title, or field conditions.
Neighboring counties
How to use this
Research
Open Zavala County in the map
Create a free account, then choose Zavala in the map's county filter to see every candidate site, with the evidence behind each match.
Open Zavala County in the map · See a sample Opportunity Brief