Mount Signal Solar Farm V
Imperial County
Overview
- Reported capacity
- 252.3 MW
- EIA-reported operating capacity; nameplate, seasonal, AC/DC, and unit ratings may differ.
- Technology
- Solar Photovoltaic
- Primary generation technology.
- Registry anchor
- Plant 61202
- Imperial County · CAISO
- Operating status
- Operating
- Mount Signal Solar Farm V is operating.
- Grid connection
- Mountain Signal 1 substation
- 230 kV · San Diego Gas & Electric (SDG&E)
Infrastructure record
- Operator
- Imperial Valley Solar 3, LLC
- Mapped facility footprint
- Mapped infrastructure footprint
Mapped infrastructure geometry associated with this asset.
- In service
- 2018-11
Profile
- Grid role
- Utility-scale solar generation delivering contracted renewable energy under a long-term power purchase arrangement.
- Grid connection
- Mountain Signal 1 substation · 230 kV · San Diego Gas & Electric (SDG&E).
- Physical build
- The Mount Signal 3 / Mount Signal Solar Farm V project was EPC-built by Mortenson in Calexico, California. The EPC scope covered a 328.9 MWdc solar project on 1,934 acres with more than 2,744,880 modules, a 230 kV substation, a 34.5 kV collection system, and a 230 kV connection to the existing Mount Signal 1 substation. Key installed suppliers included First Solar Series 4 modules, NEXTracker NX Horizon trackers, and 96 TMEIC Solar Ware Samurai 2700 Central inverters.
Structured profile
- Reported capacity
- 252.3 MW
Solar Photovoltaic
- Operating status
- operating
Mount Signal Solar Farm V is operating.
- Interconnection
- Mountain Signal 1 substation
230 kV · San Diego Gas & Electric (SDG&E)
- Location
- Imperial County
CAISO
- Asset role
Generation and physical site
EIA plant 61202 · Inventory for Sep 2026.
Reported operating nameplate by technology
- Solar
- 252.3 MW
Generator records (1)
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| MTSG3 | Solar Photovoltaic | Operating | 252.3 | Unknown |
- Physical map location · OpenStreetMap
- 32.66289, -115.55978
- Filed location · EIA
- 32.67880, -115.56720
Sources and observation dates
Questions answered by the public record
Why do Mount Signal 3 and Mount Signal Solar Farm V have different numbers?
The project known commercially as Mount Signal 3 is represented here by the Mount Signal Solar Farm V plant identity, EIA 61202. The construction announcement identifies an SCE power purchase agreement. Its SDG&E grid connection is a separate transmission relationship.
Related assets
Similar plants ranked by technology, capacity, and distance.
Units and generators
Current generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| MTSG3 | 252.3 MW 252.3 MW summer | Solar Photovoltaic PV | Nov 2018 | Operating |
Performance
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Peer context
- Technology capacity
- 252.3 MW
- Solar Photovoltaic
- National rank
- #83
- of 7,597 operating peers
- CA rank
- #16
- of 972 operating peers
Monthly generation
Download CSVLatest 12 months
632.9 GWh
Reported net generation
Latest report
Jul 2026
EIA-923 monthly filing
2025 capacity factor
30.5%
Using current reported nameplate capacity
Grid and market context
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Market registration
CAISO resource registryCommercial, land, and environmental record
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Land and environmental record
Regulatory Record Metadata
May 4, 2021
2018 facility-year; indexed May 4, 2021
The FERC EIA index row lists the exact facility with a 2018 year and an index date of May 4, 2021. These are regulatory-record metadata, not proof of an environmental-compliance milestone or commercial-operation date.
Related parties and identifiers
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
Relationship graph
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AssetOwner / operatorOfftakerRelated asset
Timeline and sources
Project milestones and public references behind the asset profile.
Project timeline
- Project Development BeganSource
8minutenergy began developing Mount Signal 3.