# Mount Signal Solar Farm V

CAISO Solar Photovoltaic · https://askthegrid.com/assets/facilities/mount-signal-solar-farm-v

Mount Signal Solar Farm V is a solar power facility with 252.3 MW of EIA-reported operating capacity in Imperial County, California, registered as EIA Plant ID 61202. Project filings list 2,800,000 solar panels and 96 inverters for the facility.

## Key facts

- Technology: Solar Photovoltaic
- Power capacity: 252.3 MW
- Operating status: operating

## Grid and market context

- ISO/RTO: CAISO
- Balancing authority: California Independent System Operator (CISO/CAISO)
- Substation: Mountain Signal 1 substation
- Point of interconnection: Mountain Signal 1 substation
- Transmission owner: San Diego Gas & Electric (SDG&E)
- Interconnection voltage: 230 kV

## Source-backed facts

- Owner logo domain: arevonenergy.com — Photos | Arevon · confidence: medium
- Identifiers: [{"value":"61202","system":"EIA plant ID"},{"value":"63447","system":"EIA operator code"},{"value":"MTSG3","system":"EIA generator ID"},{"value":"ER17-2453-000","system":"FERC market-based-rate docket"},{"value":"EG17-145-000","system":"FERC exempt-wholesale-generator docket"},{"value":"CAISO / CISO","system":"ISO/RTO and balancing authority"},{"value":"C008727","system":"FERC EQR contract/resource reference"},{"value":"15-RETI-02","system":"California Energy Commission docket"}] — Elect Plant Data with Gen. · confidence: medium
- Identifiers: [{"value":"61202","system":"EIA plant ID"},{"value":"63447","system":"EIA operator code"},{"value":"MTSG3","system":"EIA generator ID"},{"value":"ER17-2453-000","system":"FERC market-based-rate docket"},{"value":"EG17-145-000","system":"FERC exempt-wholesale-generator docket"},{"value":"CAISO / CISO","system":"ISO/RTO and balancing authority"},{"value":"C008727","system":"FERC EQR contract/resource reference"},{"value":"15-RETI-02","system":"California Energy Commission docket"}] — MBR | Lookup Data - MBR Portal - Federal Energy Regulatory... · confidence: medium
- Identifiers: [{"value":"61202","system":"EIA plant ID"},{"value":"63447","system":"EIA operator code"},{"value":"MTSG3","system":"EIA generator ID"},{"value":"ER17-2453-000","system":"FERC market-based-rate docket"},{"value":"EG17-145-000","system":"FERC exempt-wholesale-generator docket"},{"value":"CAISO / CISO","system":"ISO/RTO and balancing authority"},{"value":"C008727","system":"FERC EQR contract/resource reference"},{"value":"15-RETI-02","system":"California Energy Commission docket"}] — Source · confidence: medium
- Official project url: https://arevonenergy.com/resource-type/photos/ — Photos | Arevon · confidence: medium
- Description: Mount Signal Solar Farm V is a 252.3 MW solar photovoltaic plant in Imperial County, California, with one operating generator, MTSG3. The facility is operated by Imperial Valley Solar 3, LLC, entered operation in November 2018, and operates within the CAISO/CISO balancing authority and CAISO market. Project materials identify its public development name as Mount Signal 3, the third phase of the Mount Signal Solar Farm. — Source · confidence: medium
- Identifiers.1: {"value":"63447","system":"EIA operator code"} — Elect Plant Data with Gen. · confidence: medium
- Identifiers.6: {"value":"C008727","system":"FERC EQR contract/resource reference"} — MBR | Lookup Data - MBR Portal - Federal Energy Regulatory... · confidence: medium
- Identifiers.7: {"value":"15-RETI-02","system":"California Energy Commission docket"} — Source · confidence: high
- Parties.2: {"relationship":"Historical equity owner and financial-close sponsor","name":"Capital Dynamics","official_url":"https://www.capdyn.com"} — Source · confidence: high
- Parties.3: {"relationship":"Project developer","name":"8minutenergy Renewables, LLC","official_url":"https://8minutenergy.com"} — Source · confidence: medium
- Parties.4: {"relationship":"Engineering, procurement, and construction contractor","name":"Mortenson Construction","official_url":"https://www.mortenson.com"} — Source · confidence: high
- Parties.5: {"relationship":"Panel supplier","name":"First Solar","official_url":"https://www.firstsolar.com"} — Source · confidence: high
- Parties.6: {"relationship":"Power purchaser and offtaker","name":"Southern California Edison","official_url":"https://www.sce.com"} — Source · confidence: high
- Parties.7: {"relationship":"Institutional-note financier","name":"Allianz Global Investors","official_url":"https://www.allianzgi.com"} — Source · confidence: high
- Parties.8: {"relationship":"Institutional-note financier","name":"Samsung Asset Management","official_url":null} — Source · confidence: high
- Parties.9: {"relationship":"Construction financing participant","name":"Santander","official_url":"https://www.santander.com"} — Source · confidence: high
- Parties.10: {"relationship":"Construction financing participant","name":"NORD/LB","official_url":"https://www.nordlb.com"} — Source · confidence: high
- Parties.11: {"relationship":"Construction financing participant","name":"Rabobank","official_url":"https://www.rabobank.com"} — Source · confidence: high
- Site acres: 2000 — Source · confidence: medium
- Product url: https://www.firstsolar.com/-/media/First-Solar/Technical-Documents/Series-4-Datasheets/Series-4V3-Module-Datasheet.ashx — 328MW Solar Farm Construction Completed | Mortenson · confidence: medium
- Pcs or inverters: 96 — 328MW Solar Farm Construction Completed | Mortenson · confidence: high
- Manufacturer domain: firstsolar.com — 328MW Solar Farm Construction Completed | Mortenson · confidence: medium
- Modules or panels: 2800000 — 328MW Solar Farm Construction Completed | Mortenson · confidence: medium
- Equipment models: [{"manufacturer_domain":"firstsolar.com","product_url":"https://www.firstsolar.com/-/media/First-Solar/Technical-Documents/Series-4-Datasheets/Series-4V3-Module-Datasheet.ashx","count":2800000,"unit_mw":null,"name":"First Solar Series 4 thin-film solar modules"},{"manufacturer_domain":"tmeic.com","product_url":"https://www.tmeic.com/es/products/solar-ware-samurai/","count":96,"unit_mw":2.7,"name":"TMEIC Solar Ware Samurai 2700 Central inverter"}] — 328MW Solar Farm Construction Completed | Mortenson · confidence: medium
- Product family: First Solar Series 4 thin-film PV module — 328MW Solar Farm Construction Completed | Mortenson · confidence: medium
- Manufacturer name: First Solar — 328MW Solar Farm Construction Completed | Mortenson · confidence: medium
- Equipment models.0: {"manufacturer_domain":"firstsolar.com","product_url":"https://www.firstsolar.com/-/media/First-Solar/Technical-Documents/Series-4-Datasheets/Series-4V3-Module-Datasheet.ashx","count":2800000,"unit_mw":null,"name":"First Solar Series 4 thin-film solar modules"} — 328MW Solar Farm Construction Completed | Mortenson · confidence: medium
- Equipment models.1: {"manufacturer_domain":"tmeic.com","product_url":"https://www.tmeic.com/es/products/solar-ware-samurai/","count":96,"unit_mw":2.7,"name":"TMEIC Solar Ware Samurai 2700 Central inverter"} — 328MW Solar Farm Construction Completed | Mortenson · confidence: high
- Significance: Mount Signal 3 is the third phase of the 800 MW Mount Signal Solar Farm, which project materials described as among the largest photovoltaic projects in the world. — Source · confidence: medium
- Description: Mount Signal Solar Farm V is a 252.3 MW solar photovoltaic plant in Imperial County, California, with one operating generator, MTSG3. It is owned and operated by Imperial Valley Solar 3, LLC and operates within the CAISO/CISO system. Project materials identify the facility's public development name as Mount Signal 3, the third phase of the Mount Signal Solar Farm. Capital Dynamics acquired the project's equity interests from 8minutenergy in July 2017; 8minutenergy continued as developer, and the plant entered operation on November 1, 2018. — Source · confidence: medium
- Financing summary: Capital Dynamics' July 2017 acquisition of Mount Signal 3's equity interests from 8minutenergy had no disclosed consideration. Financial close was announced on 2017-08-28. The financing included a long-term institutional note funded by Allianz Global Investors and Samsung Asset Management, with a term mirroring the project's power purchase agreement; Santander, NORD/LB, and Rabobank participated in construction financing and underwrote required letters of credit. Capital Dynamics also arranged tax-equity financing with a single investment-grade counterparty whose identity and amount were not disclosed. — Source · confidence: high
- Financing summary: Capital Dynamics' July 2017 acquisition of Mount Signal 3's equity interests from 8minutenergy had no disclosed consideration. Financial close was announced on 2017-08-28. The financing included a long-term institutional note funded by Allianz Global Investors and Samsung Asset Management, with a term mirroring the project's power purchase agreement; Santander, NORD/LB, and Rabobank participated in construction financing and underwrote required letters of credit. Capital Dynamics also arranged tax-equity financing with a single investment-grade counterparty whose identity and amount were not disclosed. — Source · confidence: high
- Timeline: [{"event":"Project development began","date":"2011","detail":"8minutenergy began developing Mount Signal 3."},{"event":"Power-purchase agreement executed","date":"2014","detail":"Southern California Edison and 8minutenergy signed a long-term power-purchase agreement for the project's renewable output."},{"event":"Equity acquisition announced","date":"2017-07-11","detail":"Capital Dynamics announced the acquisition of Mount Signal 3's equity interests from 8minutenergy. The transaction consideration was not disclosed, and 8minutenergy remained the project developer."},{"event":"Construction contracting and procurement","date":"2017","detail":"8minutenergy had completed procurement and construction contracts; Mortenson Construction was appointed as engineering, procurement, and construction contractor, with construction planned for completion by the end of 2018."},{"event":"Financial close","date":"2017-08-28","detail":"Capital Dynamics announced financial close on the project. The financing included an institutional note, tax equity, construction-financing roles, and letters of credit."},{"event":"Commercial operation","date":"2018-11-01","detail":"The single MTSG3 solar photovoltaic generator entered operation at the EIA-recorded plant capacity of 252.3 MW."},{"event":"Expansion, retirement, and repowering status","date":null,"detail":"The plant record shows one operating generator, zero planned units, and no completed uprate or derate; no expansion, retirement, or repowering milestone is reported."}] — Source · confidence: medium
- Timeline: [{"event":"Project development began","date":"2011","detail":"8minutenergy began developing Mount Signal 3."},{"event":"Power-purchase agreement executed","date":"2014","detail":"Southern California Edison and 8minutenergy signed a long-term power-purchase agreement for the project's renewable output."},{"event":"Equity acquisition announced","date":"2017-07-11","detail":"Capital Dynamics announced the acquisition of Mount Signal 3's equity interests from 8minutenergy. The transaction consideration was not disclosed, and 8minutenergy remained the project developer."},{"event":"Construction contracting and procurement","date":"2017","detail":"8minutenergy had completed procurement and construction contracts; Mortenson Construction was appointed as engineering, procurement, and construction contractor, with construction planned for completion by the end of 2018."},{"event":"Financial close","date":"2017-08-28","detail":"Capital Dynamics announced financial close on the project. The financing included an institutional note, tax equity, construction-financing roles, and letters of credit."},{"event":"Commercial operation","date":"2018-11-01","detail":"The single MTSG3 solar photovoltaic generator entered operation at the EIA-recorded plant capacity of 252.3 MW."},{"event":"Expansion, retirement, and repowering status","date":null,"detail":"The plant record shows one operating generator, zero planned units, and no completed uprate or derate; no expansion, retirement, or repowering milestone is reported."}] — Source · confidence: medium
- Commercial parties: [{"relationship":"Owner and operator","name":"Imperial Valley Solar 3, LLC","detail":"Named as the owner and operator of Mount Signal Solar Farm V and its MTSG3 generator.","official_url":null},{"relationship":"Historical equity owner and financial-close sponsor","name":"Capital Dynamics","detail":"Acquired Mount Signal 3's equity interests from 8minutenergy and achieved financial close in 2017.","official_url":"https://www.capdyn.com"},{"relationship":"Project developer","name":"8minutenergy Renewables, LLC","detail":"Started developing Mount Signal 3 in 2011, sold the project's equity interests to Capital Dynamics, and continued to oversee development and construction.","official_url":"https://8minutenergy.com"},{"relationship":"Engineering, procurement, and construction contractor","name":"Mortenson Construction","detail":"Appointed as the EPC contractor for Mount Signal 3.","official_url":"https://www.mortenson.com"},{"relationship":"Panel supplier","name":"First Solar","detail":"Selected to supply 2.8 million Series 4 thin-film panels.","official_url":"https://www.firstsolar.com"},{"relationship":"Power purchaser and offtaker","name":"Southern California Edison","detail":"Signed the long-term power-purchase agreement with 8minutenergy in 2014.","official_url":"https://www.sce.com"},{"relationship":"Institutional-note financier","name":"Allianz Global Investors","detail":"Funded the long-term institutional note for Mount Signal 3.","official_url":"https://www.allianzgi.com"},{"relationship":"Institutional-note financier","name":"Samsung Asset Management","detail":"Participated in funding the long-term institutional note.","official_url":null},{"relationship":"Construction financing participant","name":"Santander","detail":"Participated in construction financing and underwrote required letters of credit.","official_url":"https://www.santander.com"},{"relationship":"Construction financing participant","name":"NORD/LB","detail":"Participated in construction financing and underwrote required letters of credit.","official_url":"https://www.nordlb.com"},{"relationship":"Construction financing participant","name":"Rabobank","detail":"Participated in construction financing and underwrote required letters of credit.","official_url":"https://www.rabobank.com"},{"relationship":"Lead financial advisor","name":"BofA Merrill Lynch","detail":"Served as 8minutenergy's lead financial advisor for the Mount Signal 3 transaction.","official_url":"https://www.bankofamerica.com"},{"relationship":"Legal counsel to 8minutenergy","name":"Orrick, Herrington & Sutcliffe","detail":"Provided legal counsel to 8minutenergy in connection with the transaction.","official_url":"https://www.orrick.com"},{"relationship":"Legal counsel to Capital Dynamics","name":"Amis, Patel & Brewer, LLP","detail":"Represented Capital Dynamics as legal counsel in the transaction.","official_url":null}] — Source · confidence: medium
- Commercial parties: [{"relationship":"Owner and operator","name":"Imperial Valley Solar 3, LLC","detail":"Named as the owner and operator of Mount Signal Solar Farm V and its MTSG3 generator.","official_url":null},{"relationship":"Historical equity owner and financial-close sponsor","name":"Capital Dynamics","detail":"Acquired Mount Signal 3's equity interests from 8minutenergy and achieved financial close in 2017.","official_url":"https://www.capdyn.com"},{"relationship":"Project developer","name":"8minutenergy Renewables, LLC","detail":"Started developing Mount Signal 3 in 2011, sold the project's equity interests to Capital Dynamics, and continued to oversee development and construction.","official_url":"https://8minutenergy.com"},{"relationship":"Engineering, procurement, and construction contractor","name":"Mortenson Construction","detail":"Appointed as the EPC contractor for Mount Signal 3.","official_url":"https://www.mortenson.com"},{"relationship":"Panel supplier","name":"First Solar","detail":"Selected to supply 2.8 million Series 4 thin-film panels.","official_url":"https://www.firstsolar.com"},{"relationship":"Power purchaser and offtaker","name":"Southern California Edison","detail":"Signed the long-term power-purchase agreement with 8minutenergy in 2014.","official_url":"https://www.sce.com"},{"relationship":"Institutional-note financier","name":"Allianz Global Investors","detail":"Funded the long-term institutional note for Mount Signal 3.","official_url":"https://www.allianzgi.com"},{"relationship":"Institutional-note financier","name":"Samsung Asset Management","detail":"Participated in funding the long-term institutional note.","official_url":null},{"relationship":"Construction financing participant","name":"Santander","detail":"Participated in construction financing and underwrote required letters of credit.","official_url":"https://www.santander.com"},{"relationship":"Construction financing participant","name":"NORD/LB","detail":"Participated in construction financing and underwrote required letters of credit.","official_url":"https://www.nordlb.com"},{"relationship":"Construction financing participant","name":"Rabobank","detail":"Participated in construction financing and underwrote required letters of credit.","official_url":"https://www.rabobank.com"},{"relationship":"Lead financial advisor","name":"BofA Merrill Lynch","detail":"Served as 8minutenergy's lead financial advisor for the Mount Signal 3 transaction.","official_url":"https://www.bankofamerica.com"},{"relationship":"Legal counsel to 8minutenergy","name":"Orrick, Herrington & Sutcliffe","detail":"Provided legal counsel to 8minutenergy in connection with the transaction.","official_url":"https://www.orrick.com"},{"relationship":"Legal counsel to Capital Dynamics","name":"Amis, Patel & Brewer, LLP","detail":"Represented Capital Dynamics as legal counsel in the transaction.","official_url":null}] — Source · confidence: medium
- Commercial parties.1: {"relationship":"Historical equity owner and financial-close sponsor","name":"Capital Dynamics","detail":"Acquired Mount Signal 3's equity interests from 8minutenergy and achieved financial close in 2017.","official_url":"https://www.capdyn.com"} — Source · confidence: medium
- Commercial parties.2: {"relationship":"Project developer","name":"8minutenergy Renewables, LLC","detail":"Started developing Mount Signal 3 in 2011, sold the project's equity interests to Capital Dynamics, and continued to oversee development and construction.","official_url":"https://8minutenergy.com"} — Source · confidence: high
- Commercial parties.3: {"relationship":"Engineering, procurement, and construction contractor","name":"Mortenson Construction","detail":"Appointed as the EPC contractor for Mount Signal 3.","official_url":"https://www.mortenson.com"} — Source · confidence: high
- Commercial parties.4: {"relationship":"Panel supplier","name":"First Solar","detail":"Selected to supply 2.8 million Series 4 thin-film panels.","official_url":"https://www.firstsolar.com"} — Source · confidence: high
- Commercial parties.5: {"relationship":"Power purchaser and offtaker","name":"Southern California Edison","detail":"Signed the long-term power-purchase agreement with 8minutenergy in 2014.","official_url":"https://www.sce.com"} — Source · confidence: high
- Commercial parties.6: {"relationship":"Institutional-note financier","name":"Allianz Global Investors","detail":"Funded the long-term institutional note for Mount Signal 3.","official_url":"https://www.allianzgi.com"} — Source · confidence: high
- Commercial parties.7: {"relationship":"Institutional-note financier","name":"Samsung Asset Management","detail":"Participated in funding the long-term institutional note.","official_url":null} — Source · confidence: high
- Commercial parties.8: {"relationship":"Construction financing participant","name":"Santander","detail":"Participated in construction financing and underwrote required letters of credit.","official_url":"https://www.santander.com"} — Source · confidence: high
- Commercial parties.9: {"relationship":"Construction financing participant","name":"NORD/LB","detail":"Participated in construction financing and underwrote required letters of credit.","official_url":"https://www.nordlb.com"} — Source · confidence: high
- Commercial parties.10: {"relationship":"Construction financing participant","name":"Rabobank","detail":"Participated in construction financing and underwrote required letters of credit.","official_url":"https://www.rabobank.com"} — Source · confidence: high
- Commercial parties.11: {"relationship":"Lead financial advisor","name":"BofA Merrill Lynch","detail":"Served as 8minutenergy's lead financial advisor for the Mount Signal 3 transaction.","official_url":"https://www.bankofamerica.com"} — Source · confidence: medium
- Commercial parties.12: {"relationship":"Legal counsel to 8minutenergy","name":"Orrick, Herrington & Sutcliffe","detail":"Provided legal counsel to 8minutenergy in connection with the transaction.","official_url":"https://www.orrick.com"} — Source · confidence: high
- Commercial parties.13: {"relationship":"Legal counsel to Capital Dynamics","name":"Amis, Patel & Brewer, LLP","detail":"Represented Capital Dynamics as legal counsel in the transaction.","official_url":null} — Source · confidence: high
- Acquisition date: 2017-07 — Media release · confidence: high
- Substation: Mountain Signal 1 substation — Mount Signal 3 Solar Energy Project | Mortenson · confidence: medium
- Interconnection voltage kv: 230 — Mount Signal 3 Solar Energy Project | Mortenson · confidence: high

## Timeline

- 2011 — Project development began
  8minutenergy began developing Mount Signal 3.
  Source: Source (https://capdyn.com/Customer-Content/www/news/PDFs/mount-signal-3-pr_cap-d-acquisition_final-for-wire.pdf)
- 2014 — Power-purchase agreement executed
  Southern California Edison and 8minutenergy signed a long-term power-purchase agreement for the project's renewable output.
  Source: Source (https://capdyn.com/Customer-Content/www/news/PDFs/mount-signal-3-pr_cap-d-acquisition_final-for-wire.pdf)
- 2017 — Construction contracting and procurement
  8minutenergy had completed procurement and construction contracts; Mortenson Construction was appointed as engineering, procurement, and construction contractor, with construction planned for completion by the end of 2018.
  Source: Source (https://capdyn.com/Customer-Content/www/news/PDFs/mount-signal-3-pr_cap-d-acquisition_final-for-wire.pdf)
- 2017-07-11 — Equity acquisition announced
  Capital Dynamics announced the acquisition of Mount Signal 3's equity interests from 8minutenergy. The transaction consideration was not disclosed, and 8minutenergy remained the project developer.
  Source: Source (https://capdyn.com/Customer-Content/www/news/PDFs/mount-signal-3-pr_cap-d-acquisition_final-for-wire.pdf)
- 2017-08-28 — Financial close
  Capital Dynamics announced financial close on the project. The financing included an institutional note, tax equity, construction-financing roles, and letters of credit.
  Source: Source (https://capdyn.com/Customer-Content/www/news/PDFs/20170828-capital-dynamics-cei-mount-signal-3-financial-close_media_release_en.pdf)

## Sources

- [Photos | Arevon](https://arevonenergy.com/resource-type/photos/) — arevonenergy.com · tier other
- [Elect Plant Data with Gen.](https://www.wvwelectric.com/plant/61202/A/ALL) — wvwelectric.com · tier other
- [MBR | Lookup Data - MBR Portal - Federal Energy Regulatory ...](https://mbrweb.ferc.gov/LookupData/Index/entities_to_genassets?page=51) — mbrweb.ferc.gov · tier regulatory
- [Source](https://efiling.energy.ca.gov/getdocument.aspx?tn=211758) — efiling.energy.ca.gov · tier regulatory
- [FOR IMMEDIATE RELEASE](https://www.capdyn.com/Customer-Content/www/news/PDFs/mount-signal-3-pr_cap-d-acquisition_final-for-wire.pdf) — capdyn.com · tier other
- [Media release](https://www.capdyn.com/Customer-Content/www/news/PDFs/20170828-capital-dynamics-cei-mount-signal-3-financial-close_media_release_en.pdf) — capdyn.com · tier other
- [Source](https://capdyn.com/Customer-Content/www/news/PDFs/mount-signal-3-pr_cap-d-acquisition_final-for-wire.pdf) — capdyn.com · tier other
- [Mount Signal 3 Solar Energy Project | Mortenson](https://www.mortenson.com/projects/mount-signal-3-solar) — mortenson.com · tier other
- [328MW Solar Farm Construction Completed | Mortenson](https://www.mortenson.com/news-insights/8minutenergy-and-capital-dynamics-complete-328-mw-mount-signal-3-solar-farm) — mortenson.com · tier other
- [Source](https://capdyn.com/Customer-Content/www/news/PDFs/20170828-capital-dynamics-cei-mount-signal-3-financial-close_media_release_en.pdf) — capdyn.com · tier other
- [MBR | Index](https://mbrweb.ferc.gov/SearchlkpEIA/Index?page=540) — mbrweb.ferc.gov · tier regulatory
- [Announced Resource Retirement and Mothball List posted | California ISO](https://www.caiso.com/notices/announced-resource-retirement-and-mothball-list-posted-4) — caiso.com · tier other

## Data quality

- The EIA operating record for the exact plant reports 252.3 MW and one generator, while 2017 project materials describe Mount Signal 3 as 328 MW-dc; the sources do not reconcile the different capacity figures. The acquisition terms and financing amounts were not disclosed. The disclosed financing structure included institutional debt, tax equity, construction financing roles, and letters of credit rather than a stated total transaction value. The plant record lists zero planned units and no completed uprate or derate; no expansion, retirement, or repowering date is reported.

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