California Valley Solar Ranch
High Plains Ranch II, LLCSan Luis Obispo County
California Valley Solar Ranch is a 250 MW utility-scale photovoltaic facility located on 4,700 acres in eastern San Luis Obispo County, California. The project uses SunPower single-axis tracker technology deployed across nine solar photovoltaic arrays and generates approximately 650,000 MWh annually, sufficient to power approximately 100,000 homes. The project is represented in CAISO as two phases: Phase A (210 MW) and Phase B (40 MW). The facility is operated by Clearway Energy Operating LLC and indirectly owned by Clearway Energy Group LLC.
Mapped infrastructure geometry associated with this asset.
EIA plant 57439 · Inventory for Aug 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| HPR2 | Solar Photovoltaic | Operating | 32.3 | Unknown |
| HPR2A | Solar Photovoltaic | Operating | 21 | Unknown |
| HPR2B | Solar Photovoltaic | Operating | 86.5 | Unknown |
| HPR2C | Solar Photovoltaic | Operating | 70 | Unknown |
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| HPR2 | 32.3 MW 32.3 MW summer | Solar Photovoltaic Solar · PV | Oct 2013 | Operating |
| HPR2A | 21 MW 21 MW summer | Solar Photovoltaic Solar · PV | Sep 2012 | Operating |
| HPR2B | 86.5 MW 86.5 MW summer | Solar Photovoltaic Solar · PV | Jan 2013 | Operating |
| HPR2C | 70 MW 70 MW summer | Solar Photovoltaic Solar · PV | Oct 2013 | Operating |
| HPR2D | 40 MW 40 MW summer |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
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Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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Project milestones and public references behind the asset profile.
Construction began on the 250 MW California Valley Solar Ranch facility; approximately 350 construction jobs expected over the two-year construction period
| HPR2D | Solar Photovoltaic | Operating | 40 | Unknown |
|---|
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
| Largest reported plants | Capacity | State | |
|---|---|---|---|
| NedPower Mount Storm | 264 MW | WV | |
| California Valley Solar RanchCurrent | 249.8 MW | CA |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioU.S. Department of Energy issued a Title XVII loan guarantee of approximately $1.2 billion (acquisition announcement states up to $1.237 billion) to finance construction and operations of the California Valley Solar Ranch project
NRG Energy, Inc. completed its acquisition of the 250 MW California Valley Solar Ranch project from SunPower Corporation. Acquisition immediately preceded the financial closing of the DOE Title XVII loan guarantee.
EIA-860 lists generator HPR2A with this operating date.
EIA-860 lists generator HPR2B, generator HPR2D with this operating date.
EIA-860 lists generator HPR2, generator HPR2C with this operating date.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
California Valley Solar Ranch reports 249.8 MW solar of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Aug 2026.
California Valley Solar Ranch is a Solar Photovoltaic facility in San Luis Obispo County, CA, participating in the CAISO market.
California Valley Solar Ranch is in San Luis Obispo County, CA, inside the CAISO balancing area.
California Valley Solar Ranch is operated by Clearway Energy Operating LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
California Valley Solar Ranch reported 597.7 GWh over the twelve months to 2024-12. Figures are net generation as filed to EIA-923.
By capacity, California Valley Solar Ranch ranks #116 of 7,597 operating plants of the same technology nationally. It ranks #22 of 972 in CA.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.