# Roadrunner, LLC Hybrid

ERCOT asset profile · https://askthegrid.com/assets/facilities/roadrunner-llc-hybrid

Enel Green Power · Upton County · ERCOT

Roadrunner is a solar-and-battery hybrid in Upton County, Texas. EIA's May 2026 inventory reports two photovoltaic generators totaling 400 MW AC and 497 MW DC plus a 63.3 MW / 108.6 MWh battery; operating net summer capability is 450 MW. Enel describes the solar project as 497 MW across a 252 MW first phase and 245 MW second phase, with 1.2 million bifacial panels, and describes the storage project as 57 MW / 85.7 MWh. The EIA and Enel figures use different AC, DC, seasonal, and developer scopes and are not interchangeable.

## Profile

- **Grid role:** Co-located utility-scale photovoltaic generation and battery storage in ERCOT.
- **EIA configuration:** 400 MW AC / 497 MW DC solar plus 63.3 MW / 108.6 MWh battery storage.
- **Developer scope:** Enel reports 497 MW solar and 57 MW / 85.7 MWh storage.
- **Operating phases:** Enel reports solar phases entering service in December 2019 and September 2020; EIA dates the battery to July 2023.

## Metrics

- **Operating net summer:** 450 MW — 400 MW solar · 50 MW battery capability
- **Solar AC / DC:** 400 MW / 497 MW — EIA May 2026
- **EIA battery:** 63.3 MW / 108.6 MWh — EIA May 2026
- **Enel battery scope:** 57 MW / 85.7 MWh — Developer project page
- **Solar panels:** 1.2 million — Enel
- **Registry anchor:** Plant 62561 — Roadrunner Solar, LLC

## Facts

- **Solar capacity:** 400 MW AC / 497 MW DC — EIA May 2026 · confidence: high
- **Battery rating:** 63.3 MW / 108.6 MWh — EIA May 2026 · confidence: high
- **Developer solar rating:** 497 MW — Enel · confidence: high
- **Developer storage rating:** 57 MW / 85.7 MWh — Enel · confidence: high
- **Panel count:** 1.2 million bifacial panels — Enel · confidence: high

## Sources

- [EIA May 2026 generator inventory](https://www.eia.gov/electricity/data/eia860m/) — U.S. Energy Information Administration · regulatory — Current generator records, capacity scopes, dates, status, operator, and technology.
- [Enel Roadrunner project page](https://www.enelgreenpower.com/our-projects/highlights/roadrunner-solar-project) — Enel Green Power · official — Solar phases, developer capacity, panel count, storage scope, construction, and commercial counterparties.

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Canonical page: https://askthegrid.com/assets/facilities/roadrunner-llc-hybrid
Website: [Enel Green Power](https://enelgreenpower.com/)
Profile published: 2026-07-17T03:34:44.909Z
Source: Ask the Grid — https://askthegrid.com/