Imperial Valley Solar
Silver Ridge Power LLCImperial County
Imperial Valley Solar, LLC is the Mount Signal 1 photovoltaic plant in Imperial County, California, with 199.9 MW of EIA nameplate capacity. SDG&E is the contracted power purchaser for this phase: the CPUC approved its 25-year agreement in June 2012. Mount Signal 2 and Mount Signal 3 are separate facilities with their own plant identities and contracts.
Mapped infrastructure geometry associated with this asset.
Solar Photovoltaic
Imperial Valley Solar, LLC is operating.
230 kV · San Diego Gas & Electric (SDG&E)
CAISO
EIA plant 56917 · Inventory for Sep 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| 1 | Solar Photovoltaic | Operating | 101 | Unknown |
| 1A | Solar Photovoltaic | Operating | 64.6 | Unknown |
| 1B | Solar Photovoltaic | Operating | 34.3 | Unknown |
| 2 | Solar Photovoltaic | canceled_or_postponed | 400 | Unknown |
The CPUC’s June 2012 Resolution E-4505 approved SDG&E’s 25-year agreement for Mount Signal 1, initially contracted through 82LV 8ME, LLC. This profile is EIA plant 56917, Imperial Valley Solar. Separate Mount Signal 2 and 3 profiles describe other phases.
Similar plants ranked by technology, capacity, and distance.
Current generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 1 | 101 MW 91.9 MW summer | Solar Photovoltaic PV | Nov 2013 | Operating |
| 1A | 64.6 MW 58.8 MW summer | Solar Photovoltaic PV | Dec 2013 | Operating |
| 1B | 34.3 MW 21.4 MW summer | Solar Photovoltaic PV | Mar 2014 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
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.
Drag organizations to explore the network. Select a node to pin its details and available page link.
Project milestones and public references behind the asset profile.
EIA-860 lists generator 1 with this operating date.
CAISO · Imperial County
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
EIA-860 lists generator 1A with this operating date.
EIA-860 lists generator 1B with this operating date.
SunEdison and its subsidiary agreed to purchase 50% of Silver Ridge Power from AES Solar for $165 million, subject to closing adjustments. The transaction included SunEdison's indirect 50% interest in the Mount Signal project.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
The CPUC’s June 2012 Resolution E-4505 approved SDG&E’s 25-year agreement for Mount Signal 1, initially contracted through 82LV 8ME, LLC. This profile is EIA plant 56917, Imperial Valley Solar. Separate Mount Signal 2 and 3 profiles describe other phases.
Imperial Valley Solar reports 199.9 MW solar of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.
Imperial Valley Solar is a Solar Photovoltaic facility in Imperial County, CA, participating in the CAISO market.
Imperial Valley Solar is in Imperial County, CA, inside the CAISO balancing area.
Imperial Valley Solar is operated by Imperial Valley Solar, LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Imperial Valley Solar reported 443.5 GWh over the twelve months to 2024-12. Figures are net generation as filed to EIA-923.
Imperial Valley Solar interconnects at Imperial Valley Substation, on the San Diego Gas & Electric (SDG&E) system.
By capacity, Imperial Valley Solar ranks #213 of 7,597 operating plants of the same technology nationally. It ranks #35 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.
