# Millers Branch Solar

ERCOT asset profile · https://askthegrid.com/assets/facilities/millers-branch-solar

## Current generation inventory

EIA plant 69101 · Inventory reporting month: 2026-08.

- solar: 380 MW operating nameplate
- Capacity basis: operating_generator_nameplate_mw
- Source inventory: [EIA-860M workbook (preliminary)](https://www.eia.gov/electricity/data/eia860m/xls/august_generator2026.xlsx)
- Inventory retrieved: 2026-10-10T02:12:40.665346+00:00
- Filed coordinate (longitude, latitude): -99.58652, 33.22132
- OSM extract: 2026-10-08T20:21:06Z
- OSM mapped edit: 2026-09-15 13:33:33+00:00
- Map prepared: 2026-10-10T02:28:18.413714+00:00

Battery power (MW) and stored energy (MWh) are separate measures. Shared physical-site membership does not establish electrical connectivity, settlement or a common export limit.

## Reviewed overview

Millers Branch Solar Facility is a solar project in Haskell County, Texas, owned and built by Southern Power, a Southern Company subsidiary. Southern Power acquired it from EDF Renewables in September 2023 as a 200 MW early-stage project. Phase II added 180 MW, and a 132 MW Phase III announced in November 2024 would bring the facility to 512 MW. Thermo Fisher Scientific buys the first phase under a 20-year virtual power purchase agreement.

## Reviewed metrics

- **Nameplate capacity:** 380 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 69101 — plant-69101

## Facts

- **Technology:** Solar Photovoltaic
- **Operator:** Southern Power Co

## Related parties

- **Owner / developer / acquirer:** Southern Power — owner ([source](https://www.southernpowercompany.com))
- **Parent company:** Southern Company — parent_company ([source](https://www.southerncompany.com))
- **Former owner / developer / seller:** EDF Renewables — former_owner
- **Offtaker:** Thermo Fisher Scientific — offtaker
- **Offtaker:** Synopsys, Inc — offtaker
- **Offtaker:** Keysight Technologies — offtaker

## Sources

- [southerncompany.mediaroom.com](https://southerncompany.mediaroom.com/2023-09-21-Southern-Power-acquires-Millers-Branch-Solar-Facility) — southerncompany.mediaroom.com · public_source — Source retained for exact-record publication review.
- [southerncompany.mediaroom.com](https://southerncompany.mediaroom.com/2024-11-21-Southern-Power-announces-further-expansion-of-Millers-Branch-Solar-Facility-in-Texas) — southerncompany.mediaroom.com · public_source — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/millers-branch-solar
Website: [Southern Power](https://www.southernpowercompany.com)

Source: Ask the Grid — https://askthegrid.com/