# Chestnut

CAISO Batteries, Solar Photovoltaic · https://askthegrid.com/assets/facilities/chestnut

Chestnut is a hybrid solar and battery storage facility with 285.6 MW of EIA-reported operating capacity in Kings County, California, registered as EIA Plant ID 63849. Project filings list 563,640 solar panels and 60 inverters for the facility.

## Key facts

- Technology: Batteries, Solar Photovoltaic
- Power capacity: 285.6 MW
- Operating status: operating

## Grid and market context

- ISO/RTO: CAISO
- Balancing authority: CISO
- Substation: Gates Substation
- Point of interconnection: Gates Substation
- Transmission owner: Pacific Gas and Electric Company (PG&E)
- Interconnection voltage: 230 kV

## Source-backed facts

- Identifiers: [{"value":"63849","system":"EIA plant ID"},{"value":"1795","system":"California Energy Commission plant ID"},{"value":"S0809","system":"California Energy Commission unit ID"},{"value":"1120","system":"CAISO interconnection queue ID"},{"value":"CHESTN_2_CHWBX2","system":"CAISO resource ID — BESS"},{"value":"CHESTN_2_CHWSX2","system":"CAISO resource ID — PV"},{"value":"CISO","system":"Balancing authority"}] — Public Queue Report · confidence: medium
- Identifiers: [{"value":"63849","system":"EIA plant ID"},{"value":"1795","system":"California Energy Commission plant ID"},{"value":"S0809","system":"California Energy Commission unit ID"},{"value":"1120","system":"CAISO interconnection queue ID"},{"value":"CHESTN_2_CHWBX2","system":"CAISO resource ID — BESS"},{"value":"CHESTN_2_CHWSX2","system":"CAISO resource ID — PV"},{"value":"CISO","system":"Balancing authority"}] — CAISO Resource Visibility Template · confidence: medium
- Identifiers: [{"value":"63849","system":"EIA plant ID"},{"value":"1795","system":"California Energy Commission plant ID"},{"value":"S0809","system":"California Energy Commission unit ID"},{"value":"1120","system":"CAISO interconnection queue ID"},{"value":"CHESTN_2_CHWBX2","system":"CAISO resource ID — BESS"},{"value":"CHESTN_2_CHWSX2","system":"CAISO resource ID — PV"},{"value":"CISO","system":"Balancing authority"}] — Cross-Reference Table · confidence: medium
- Description: Chestnut is an operational 285.6 MW solar-and-battery power plant in Kings County, California. The plant has two operational generating units and first entered service in December 2023. CAISO records identify a 150 MW photovoltaic resource and a 135 MW battery resource associated with the Chestnut Westside project, which has completed queue ID 1120. — Public Queue Report · confidence: medium
- Description: Chestnut is an operational 285.6 MW solar-and-battery power plant in Kings County, California. The plant has two operational generating units and first entered service in December 2023. CAISO records identify a 150 MW photovoltaic resource and a 135 MW battery resource associated with the Chestnut Westside project, which has completed queue ID 1120. — CAISO Resource Visibility Template · confidence: medium
- Parties: [{"relationship":"Operator and project entity","name":"Chestnut Westside LLC","official_url":null},{"relationship":"Registered subsidiary / ownership-structure entity","name":"Opportunity Zone Fund, L.P.","official_url":null},{"relationship":"Westlands Solar Park developer and affiliated project sponsor","name":"CIM Group","official_url":"https://www.cimgroup.com/"},{"relationship":"Recorded project-site owner after March 2023; not identified as the plant operator","name":"Castanea Project, LLC","official_url":null},{"relationship":"Energy offtaker and construction-financing counterparty","name":"Amazon Energy, LLC","official_url":null}] — Castanea Project LLC Williamson Act re-enrollment · confidence: medium
- Parties: [{"relationship":"Operator and project entity","name":"Chestnut Westside LLC","official_url":null},{"relationship":"Registered subsidiary / ownership-structure entity","name":"Opportunity Zone Fund, L.P.","official_url":null},{"relationship":"Westlands Solar Park developer and affiliated project sponsor","name":"CIM Group","official_url":"https://www.cimgroup.com/"},{"relationship":"Recorded project-site owner after March 2023; not identified as the plant operator","name":"Castanea Project, LLC","official_url":null},{"relationship":"Energy offtaker and construction-financing counterparty","name":"Amazon Energy, LLC","official_url":null}] — Westlands Solar Park, One of the Largest Permitted Solar Parks in the World and the Largest in North America, Starts Construction · confidence: medium
- Identifiers.1: {"value":"1795","system":"California Energy Commission plant ID"} — Cross-Reference Table · confidence: medium
- Identifiers.2: {"value":"S0809","system":"California Energy Commission unit ID"} — Cross-Reference Table · confidence: medium
- Identifiers.3: {"value":"1120","system":"CAISO interconnection queue ID"} — Public Queue Report · confidence: medium
- Identifiers.4: {"value":"CHESTN_2_CHWBX2","system":"CAISO resource ID — BESS"} — CAISO Resource Visibility Template · confidence: high
- Identifiers.5: {"value":"CHESTN_2_CHWSX2","system":"CAISO resource ID — PV"} — CAISO Resource Visibility Template · confidence: high
- Parties.2: {"relationship":"Westlands Solar Park developer and affiliated project sponsor","name":"CIM Group","official_url":"https://www.cimgroup.com/"} — Westlands Solar Park, One of the Largest Permitted Solar Parks in the World and the Largest in North America, Starts Construction · confidence: medium
- Interconnection: 230-kV substation; CAISO queue position 1120; balancing authority CISO — Source · confidence: medium
- Site acres: 1040 — Source · confidence: medium
- Construction scope: Documented scope for the Chestnut project includes a 150 MW utility-scale PV facility on approximately 1,040 acres with single-axis tracker arrays, 563,640 solar modules, 60 power-converting stations rated at 2.5 MW each, a 4-hour battery energy-storage system using Tesla Megapack 2XL technology, and a 230 kV, 200 MVA substation. — Chestnut | Kings County, California - Blymyer Engineers · confidence: medium
- Product url: https://www.tesla.com/megapack — Chestnut | Kings County, California - Blymyer Engineers · confidence: medium
- Product url: https://www.tesla.com/megapack — Megapack · confidence: medium
- Pcs or inverters: 60 — Source · confidence: high
- Kind: solar — Chestnut | Kings County, California - Blymyer Engineers · confidence: medium
- Manufacturer domain: tesla.com — Chestnut | Kings County, California - Blymyer Engineers · confidence: high
- Equipment models: [{"manufacturer_domain":"tesla.com","product_url":"https://www.tesla.com/megapack","count":null,"unit_mw":null,"name":"Tesla Megapack 2XL"}] — Chestnut | Kings County, California - Blymyer Engineers · confidence: high
- Product family: Tesla Megapack 2XL — Chestnut | Kings County, California - Blymyer Engineers · confidence: high
- Manufacturer name: Tesla — Chestnut | Kings County, California - Blymyer Engineers · confidence: high
- Equipment models.0: {"manufacturer_domain":"tesla.com","product_url":"https://www.tesla.com/megapack","count":null,"unit_mw":null,"name":"Tesla Megapack 2XL"} — Chestnut | Kings County, California - Blymyer Engineers · confidence: medium
- Description: Chestnut is a 285.6 MW operational solar-and-battery plant in Kings County, California, with two generating units; its first unit entered service in December 2023. CAISO records associate the project with a 150 MW photovoltaic resource and a 135 MW battery resource. A 2019 Kings County filing described the solar component as a 150 MW generating station on approximately 1,040 acres with a 230-kV substation and a planned 12-month construction period beginning in 2020. Recorded site ownership transferred from Westlands Water District to Chestnut Westside LLC in May 2022 and from Chestnut Westside LLC to Castanea Project LLC in March 2023; those records concern the project site and do not by themselves establish consideration for a generating-asset sale. — Source · confidence: medium
- Description: Chestnut is a 285.6 MW operational solar-and-battery plant in Kings County, California, with two generating units; its first unit entered service in December 2023. CAISO records associate the project with a 150 MW photovoltaic resource and a 135 MW battery resource. A 2019 Kings County filing described the solar component as a 150 MW generating station on approximately 1,040 acres with a 230-kV substation and a planned 12-month construction period beginning in 2020. Recorded site ownership transferred from Westlands Water District to Chestnut Westside LLC in May 2022 and from Chestnut Westside LLC to Castanea Project LLC in March 2023; those records concern the project site and do not by themselves establish consideration for a generating-asset sale. — Chestnut Solar Project · confidence: medium
- Description: Chestnut is a 285.6 MW operational solar-and-battery plant in Kings County, California, with two generating units; its first unit entered service in December 2023. CAISO records associate the project with a 150 MW photovoltaic resource and a 135 MW battery resource. A 2019 Kings County filing described the solar component as a 150 MW generating station on approximately 1,040 acres with a 230-kV substation and a planned 12-month construction period beginning in 2020. Recorded site ownership transferred from Westlands Water District to Chestnut Westside LLC in May 2022 and from Chestnut Westside LLC to Castanea Project LLC in March 2023; those records concern the project site and do not by themselves establish consideration for a generating-asset sale. — Castanea Project LLC Williamson Act re-enrollment · confidence: medium
- Quality notes: ["The May 2022 and March 2023 transactions are recorded transfers of the project site. The litigation separately refers to Chestnut selling tangible and intangible project assets, but the retrieved opinion does not identify the buyer, sale consideration, or sale date for that broader asset transaction.","The $24 million disclosed in the litigation was cash collateral posted with a bank to underwrite the Amazon agreement. no expansion, retirement, or repowering milestone was identified. Battery duration or equipment counts are not inferred from MW figures."] — Castanea Project LLC Williamson Act re-enrollment · confidence: medium
- Financing summary: In 2021, Amazon entered into a 15-year power-purchase arrangement for Chestnut energy, which Chestnut intended to use to obtain financing needed to build the project. The appellate record says Chestnut was unable to secure financing and later negotiated amended terms with Amazon. The record also says Amazon withdrew $24 million in cash collateral that Chestnut had posted with a bank to underwrite the agreement; this was collateral associated with the contract, not disclosed project-financing principal or sale consideration. No lender, debt amount, tax-equity investment, or financing-closing date for Chestnut was identified. — Amazon's Suit Over Soured Solar Deals Survives Dismissal · confidence: medium
- Timeline: [{"event":"Predecessor site acquisition","date":"2002-12","detail":"Westlands Water District acquired the project site in lieu of eminent domain to retire the land from irrigated agriculture."},{"event":"Project construction plan","date":"2020","detail":"The Kings County environmental filing described a 150 MW solar generating station, 230-kV substation, and planned 12-month construction period commencing in 2020."},{"event":"Amazon offtake and financing arrangement","date":"2021","detail":"Amazon entered into a 15-year power-purchase arrangement for energy from Chestnut and the related Solar Blue project; Chestnut intended to use the agreement to obtain financing for construction."},{"event":"Recorded site acquisition by Chestnut Westside","date":"2022-05-27","detail":"Westlands Water District transferred the project site to Chestnut Westside LLC by recorded grant deed."},{"event":"Exempt-wholesale-generator filing","date":"2023-01-13","detail":"Chestnut Westside LLC filed a notice of self-certification of exempt wholesale generator status with FERC."},{"event":"Recorded site transfer to Castanea Project","date":"2023-03-20","detail":"Chestnut Westside LLC transferred the project site to Castanea Project LLC by recorded grant deed."},{"event":"Transmission-service transfer","date":"2023-04-08","detail":"A FERC notice reported a second amended transmission service agreement transferring the Chestnut arrangement from Chestnut to Castanea Project LLC, effective April 8, 2023."},{"event":"Construction-related technology work","date":"2023-12-18","detail":"BEI Construction reported that SOLV Energy had awarded it technology-infrastructure contracts for the Chestnut project and that the work was underway."},{"event":"Commercial operation","date":"2023-12","detail":"EIA-based plant records report Chestnut's first unit online in December 2023, with two operational units totaling 285.6 MW."},{"event":"Undated project-asset sale referenced in litigation","date":null,"detail":"The California appellate opinion records that Chestnut sold all of its tangible and intangible assets in connection with exiting the Amazon contract. The opinion does not identify the buyer, transaction consideration, or transaction month and year."}] — Castanea Project LLC Williamson Act re-enrollment · confidence: medium
- Timeline: [{"event":"Predecessor site acquisition","date":"2002-12","detail":"Westlands Water District acquired the project site in lieu of eminent domain to retire the land from irrigated agriculture."},{"event":"Project construction plan","date":"2020","detail":"The Kings County environmental filing described a 150 MW solar generating station, 230-kV substation, and planned 12-month construction period commencing in 2020."},{"event":"Amazon offtake and financing arrangement","date":"2021","detail":"Amazon entered into a 15-year power-purchase arrangement for energy from Chestnut and the related Solar Blue project; Chestnut intended to use the agreement to obtain financing for construction."},{"event":"Recorded site acquisition by Chestnut Westside","date":"2022-05-27","detail":"Westlands Water District transferred the project site to Chestnut Westside LLC by recorded grant deed."},{"event":"Exempt-wholesale-generator filing","date":"2023-01-13","detail":"Chestnut Westside LLC filed a notice of self-certification of exempt wholesale generator status with FERC."},{"event":"Recorded site transfer to Castanea Project","date":"2023-03-20","detail":"Chestnut Westside LLC transferred the project site to Castanea Project LLC by recorded grant deed."},{"event":"Transmission-service transfer","date":"2023-04-08","detail":"A FERC notice reported a second amended transmission service agreement transferring the Chestnut arrangement from Chestnut to Castanea Project LLC, effective April 8, 2023."},{"event":"Construction-related technology work","date":"2023-12-18","detail":"BEI Construction reported that SOLV Energy had awarded it technology-infrastructure contracts for the Chestnut project and that the work was underway."},{"event":"Commercial operation","date":"2023-12","detail":"EIA-based plant records report Chestnut's first unit online in December 2023, with two operational units totaling 285.6 MW."},{"event":"Undated project-asset sale referenced in litigation","date":null,"detail":"The California appellate opinion records that Chestnut sold all of its tangible and intangible assets in connection with exiting the Amazon contract. The opinion does not identify the buyer, transaction consideration, or transaction month and year."}] — Chestnut Solar Project · confidence: medium
- Timeline: [{"event":"Predecessor site acquisition","date":"2002-12","detail":"Westlands Water District acquired the project site in lieu of eminent domain to retire the land from irrigated agriculture."},{"event":"Project construction plan","date":"2020","detail":"The Kings County environmental filing described a 150 MW solar generating station, 230-kV substation, and planned 12-month construction period commencing in 2020."},{"event":"Amazon offtake and financing arrangement","date":"2021","detail":"Amazon entered into a 15-year power-purchase arrangement for energy from Chestnut and the related Solar Blue project; Chestnut intended to use the agreement to obtain financing for construction."},{"event":"Recorded site acquisition by Chestnut Westside","date":"2022-05-27","detail":"Westlands Water District transferred the project site to Chestnut Westside LLC by recorded grant deed."},{"event":"Exempt-wholesale-generator filing","date":"2023-01-13","detail":"Chestnut Westside LLC filed a notice of self-certification of exempt wholesale generator status with FERC."},{"event":"Recorded site transfer to Castanea Project","date":"2023-03-20","detail":"Chestnut Westside LLC transferred the project site to Castanea Project LLC by recorded grant deed."},{"event":"Transmission-service transfer","date":"2023-04-08","detail":"A FERC notice reported a second amended transmission service agreement transferring the Chestnut arrangement from Chestnut to Castanea Project LLC, effective April 8, 2023."},{"event":"Construction-related technology work","date":"2023-12-18","detail":"BEI Construction reported that SOLV Energy had awarded it technology-infrastructure contracts for the Chestnut project and that the work was underway."},{"event":"Commercial operation","date":"2023-12","detail":"EIA-based plant records report Chestnut's first unit online in December 2023, with two operational units totaling 285.6 MW."},{"event":"Undated project-asset sale referenced in litigation","date":null,"detail":"The California appellate opinion records that Chestnut sold all of its tangible and intangible assets in connection with exiting the Amazon contract. The opinion does not identify the buyer, transaction consideration, or transaction month and year."}] — Amazon's Suit Over Soured Solar Deals Survives Dismissal · confidence: medium
- Timeline: [{"event":"Predecessor site acquisition","date":"2002-12","detail":"Westlands Water District acquired the project site in lieu of eminent domain to retire the land from irrigated agriculture."},{"event":"Project construction plan","date":"2020","detail":"The Kings County environmental filing described a 150 MW solar generating station, 230-kV substation, and planned 12-month construction period commencing in 2020."},{"event":"Amazon offtake and financing arrangement","date":"2021","detail":"Amazon entered into a 15-year power-purchase arrangement for energy from Chestnut and the related Solar Blue project; Chestnut intended to use the agreement to obtain financing for construction."},{"event":"Recorded site acquisition by Chestnut Westside","date":"2022-05-27","detail":"Westlands Water District transferred the project site to Chestnut Westside LLC by recorded grant deed."},{"event":"Exempt-wholesale-generator filing","date":"2023-01-13","detail":"Chestnut Westside LLC filed a notice of self-certification of exempt wholesale generator status with FERC."},{"event":"Recorded site transfer to Castanea Project","date":"2023-03-20","detail":"Chestnut Westside LLC transferred the project site to Castanea Project LLC by recorded grant deed."},{"event":"Transmission-service transfer","date":"2023-04-08","detail":"A FERC notice reported a second amended transmission service agreement transferring the Chestnut arrangement from Chestnut to Castanea Project LLC, effective April 8, 2023."},{"event":"Construction-related technology work","date":"2023-12-18","detail":"BEI Construction reported that SOLV Energy had awarded it technology-infrastructure contracts for the Chestnut project and that the work was underway."},{"event":"Commercial operation","date":"2023-12","detail":"EIA-based plant records report Chestnut's first unit online in December 2023, with two operational units totaling 285.6 MW."},{"event":"Undated project-asset sale referenced in litigation","date":null,"detail":"The California appellate opinion records that Chestnut sold all of its tangible and intangible assets in connection with exiting the Amazon contract. The opinion does not identify the buyer, transaction consideration, or transaction month and year."}] — Federal Register, Volume 88 Issue 13 (Friday, January 20, 2023) · confidence: medium
- Timeline: [{"event":"Predecessor site acquisition","date":"2002-12","detail":"Westlands Water District acquired the project site in lieu of eminent domain to retire the land from irrigated agriculture."},{"event":"Project construction plan","date":"2020","detail":"The Kings County environmental filing described a 150 MW solar generating station, 230-kV substation, and planned 12-month construction period commencing in 2020."},{"event":"Amazon offtake and financing arrangement","date":"2021","detail":"Amazon entered into a 15-year power-purchase arrangement for energy from Chestnut and the related Solar Blue project; Chestnut intended to use the agreement to obtain financing for construction."},{"event":"Recorded site acquisition by Chestnut Westside","date":"2022-05-27","detail":"Westlands Water District transferred the project site to Chestnut Westside LLC by recorded grant deed."},{"event":"Exempt-wholesale-generator filing","date":"2023-01-13","detail":"Chestnut Westside LLC filed a notice of self-certification of exempt wholesale generator status with FERC."},{"event":"Recorded site transfer to Castanea Project","date":"2023-03-20","detail":"Chestnut Westside LLC transferred the project site to Castanea Project LLC by recorded grant deed."},{"event":"Transmission-service transfer","date":"2023-04-08","detail":"A FERC notice reported a second amended transmission service agreement transferring the Chestnut arrangement from Chestnut to Castanea Project LLC, effective April 8, 2023."},{"event":"Construction-related technology work","date":"2023-12-18","detail":"BEI Construction reported that SOLV Energy had awarded it technology-infrastructure contracts for the Chestnut project and that the work was underway."},{"event":"Commercial operation","date":"2023-12","detail":"EIA-based plant records report Chestnut's first unit online in December 2023, with two operational units totaling 285.6 MW."},{"event":"Undated project-asset sale referenced in litigation","date":null,"detail":"The California appellate opinion records that Chestnut sold all of its tangible and intangible assets in connection with exiting the Amazon contract. The opinion does not identify the buyer, transaction consideration, or transaction month and year."}] — Combined Notice of Filings #1 · confidence: medium
- Timeline: [{"event":"Predecessor site acquisition","date":"2002-12","detail":"Westlands Water District acquired the project site in lieu of eminent domain to retire the land from irrigated agriculture."},{"event":"Project construction plan","date":"2020","detail":"The Kings County environmental filing described a 150 MW solar generating station, 230-kV substation, and planned 12-month construction period commencing in 2020."},{"event":"Amazon offtake and financing arrangement","date":"2021","detail":"Amazon entered into a 15-year power-purchase arrangement for energy from Chestnut and the related Solar Blue project; Chestnut intended to use the agreement to obtain financing for construction."},{"event":"Recorded site acquisition by Chestnut Westside","date":"2022-05-27","detail":"Westlands Water District transferred the project site to Chestnut Westside LLC by recorded grant deed."},{"event":"Exempt-wholesale-generator filing","date":"2023-01-13","detail":"Chestnut Westside LLC filed a notice of self-certification of exempt wholesale generator status with FERC."},{"event":"Recorded site transfer to Castanea Project","date":"2023-03-20","detail":"Chestnut Westside LLC transferred the project site to Castanea Project LLC by recorded grant deed."},{"event":"Transmission-service transfer","date":"2023-04-08","detail":"A FERC notice reported a second amended transmission service agreement transferring the Chestnut arrangement from Chestnut to Castanea Project LLC, effective April 8, 2023."},{"event":"Construction-related technology work","date":"2023-12-18","detail":"BEI Construction reported that SOLV Energy had awarded it technology-infrastructure contracts for the Chestnut project and that the work was underway."},{"event":"Commercial operation","date":"2023-12","detail":"EIA-based plant records report Chestnut's first unit online in December 2023, with two operational units totaling 285.6 MW."},{"event":"Undated project-asset sale referenced in litigation","date":null,"detail":"The California appellate opinion records that Chestnut sold all of its tangible and intangible assets in connection with exiting the Amazon contract. The opinion does not identify the buyer, transaction consideration, or transaction month and year."}] — SOLV Energy chooses BEI Construction for fiber installation - BEI Construction · confidence: medium
- Commercial parties: [{"relationship":"Project entity and operator","name":"Chestnut Westside LLC","detail":"Named by EIA-based plant records as the operator of Chestnut and identified in the Amazon litigation as the Chestnut project entity. The litigation also refers to Chestnut selling tangible and intangible assets, without identifying the buyer or consideration.","official_url":null},{"relationship":"Recorded post-transfer site owner and transmission-service counterparty","name":"Castanea Project LLC","detail":"Received the project site from Chestnut Westside LLC on March 20, 2023. A FERC notice reported a related transmission-service-agreement transfer from Chestnut to Castanea effective April 8, 2023.","official_url":null},{"relationship":"Predecessor site owner","name":"Westlands Water District","detail":"Acquired the site in December 2002 and transferred it to Chestnut Westside LLC on May 27, 2022.","official_url":"https://wwd.ca.gov/"},{"relationship":"Energy offtaker and contractual counterparty","name":"Amazon Energy LLC","detail":"Agreed to purchase energy from Chestnut and entered into a 15-year power-purchase arrangement in 2021. The arrangement was intended to help Chestnut obtain construction financing.","official_url":null},{"relationship":"Westlands Solar Park developer and affiliated project sponsor","name":"CIM Group","detail":"CIM announced development of the broader Westlands Solar Park and is identified in the project ownership materials as an affiliated sponsor; the available sources do not establish CIM as the direct operator of Chestnut.","official_url":"https://www.cimgroup.com/"},{"relationship":"Solar and storage EPC contractor","name":"SOLV Energy","detail":"Described as a major solar EPC company; it awarded BEI Construction technology-infrastructure contracts for Chestnut and other Westlands-area projects.","official_url":"https://www.solvenergy.com/"},{"relationship":"Technology-infrastructure and fiber contractor","name":"BEI Construction","detail":"Reported that SOLV Energy awarded it technology-infrastructure contracts for the Chestnut solar project, with work underway in December 2023.","official_url":"https://beiconstruction.com/"}] — Castanea Project LLC Williamson Act re-enrollment · confidence: medium
- Commercial parties: [{"relationship":"Project entity and operator","name":"Chestnut Westside LLC","detail":"Named by EIA-based plant records as the operator of Chestnut and identified in the Amazon litigation as the Chestnut project entity. The litigation also refers to Chestnut selling tangible and intangible assets, without identifying the buyer or consideration.","official_url":null},{"relationship":"Recorded post-transfer site owner and transmission-service counterparty","name":"Castanea Project LLC","detail":"Received the project site from Chestnut Westside LLC on March 20, 2023. A FERC notice reported a related transmission-service-agreement transfer from Chestnut to Castanea effective April 8, 2023.","official_url":null},{"relationship":"Predecessor site owner","name":"Westlands Water District","detail":"Acquired the site in December 2002 and transferred it to Chestnut Westside LLC on May 27, 2022.","official_url":"https://wwd.ca.gov/"},{"relationship":"Energy offtaker and contractual counterparty","name":"Amazon Energy LLC","detail":"Agreed to purchase energy from Chestnut and entered into a 15-year power-purchase arrangement in 2021. The arrangement was intended to help Chestnut obtain construction financing.","official_url":null},{"relationship":"Westlands Solar Park developer and affiliated project sponsor","name":"CIM Group","detail":"CIM announced development of the broader Westlands Solar Park and is identified in the project ownership materials as an affiliated sponsor; the available sources do not establish CIM as the direct operator of Chestnut.","official_url":"https://www.cimgroup.com/"},{"relationship":"Solar and storage EPC contractor","name":"SOLV Energy","detail":"Described as a major solar EPC company; it awarded BEI Construction technology-infrastructure contracts for Chestnut and other Westlands-area projects.","official_url":"https://www.solvenergy.com/"},{"relationship":"Technology-infrastructure and fiber contractor","name":"BEI Construction","detail":"Reported that SOLV Energy awarded it technology-infrastructure contracts for the Chestnut solar project, with work underway in December 2023.","official_url":"https://beiconstruction.com/"}] — Westlands Solar Park, One of the Largest Permitted Solar Parks in the World and the Largest in North America, Starts Construction · confidence: medium
- Commercial parties: [{"relationship":"Project entity and operator","name":"Chestnut Westside LLC","detail":"Named by EIA-based plant records as the operator of Chestnut and identified in the Amazon litigation as the Chestnut project entity. The litigation also refers to Chestnut selling tangible and intangible assets, without identifying the buyer or consideration.","official_url":null},{"relationship":"Recorded post-transfer site owner and transmission-service counterparty","name":"Castanea Project LLC","detail":"Received the project site from Chestnut Westside LLC on March 20, 2023. A FERC notice reported a related transmission-service-agreement transfer from Chestnut to Castanea effective April 8, 2023.","official_url":null},{"relationship":"Predecessor site owner","name":"Westlands Water District","detail":"Acquired the site in December 2002 and transferred it to Chestnut Westside LLC on May 27, 2022.","official_url":"https://wwd.ca.gov/"},{"relationship":"Energy offtaker and contractual counterparty","name":"Amazon Energy LLC","detail":"Agreed to purchase energy from Chestnut and entered into a 15-year power-purchase arrangement in 2021. The arrangement was intended to help Chestnut obtain construction financing.","official_url":null},{"relationship":"Westlands Solar Park developer and affiliated project sponsor","name":"CIM Group","detail":"CIM announced development of the broader Westlands Solar Park and is identified in the project ownership materials as an affiliated sponsor; the available sources do not establish CIM as the direct operator of Chestnut.","official_url":"https://www.cimgroup.com/"},{"relationship":"Solar and storage EPC contractor","name":"SOLV Energy","detail":"Described as a major solar EPC company; it awarded BEI Construction technology-infrastructure contracts for Chestnut and other Westlands-area projects.","official_url":"https://www.solvenergy.com/"},{"relationship":"Technology-infrastructure and fiber contractor","name":"BEI Construction","detail":"Reported that SOLV Energy awarded it technology-infrastructure contracts for the Chestnut solar project, with work underway in December 2023.","official_url":"https://beiconstruction.com/"}] — SOLV Energy chooses BEI Construction for fiber installation - BEI Construction · confidence: medium
- Commercial parties: [{"relationship":"Project entity and operator","name":"Chestnut Westside LLC","detail":"Named by EIA-based plant records as the operator of Chestnut and identified in the Amazon litigation as the Chestnut project entity. The litigation also refers to Chestnut selling tangible and intangible assets, without identifying the buyer or consideration.","official_url":null},{"relationship":"Recorded post-transfer site owner and transmission-service counterparty","name":"Castanea Project LLC","detail":"Received the project site from Chestnut Westside LLC on March 20, 2023. A FERC notice reported a related transmission-service-agreement transfer from Chestnut to Castanea effective April 8, 2023.","official_url":null},{"relationship":"Predecessor site owner","name":"Westlands Water District","detail":"Acquired the site in December 2002 and transferred it to Chestnut Westside LLC on May 27, 2022.","official_url":"https://wwd.ca.gov/"},{"relationship":"Energy offtaker and contractual counterparty","name":"Amazon Energy LLC","detail":"Agreed to purchase energy from Chestnut and entered into a 15-year power-purchase arrangement in 2021. The arrangement was intended to help Chestnut obtain construction financing.","official_url":null},{"relationship":"Westlands Solar Park developer and affiliated project sponsor","name":"CIM Group","detail":"CIM announced development of the broader Westlands Solar Park and is identified in the project ownership materials as an affiliated sponsor; the available sources do not establish CIM as the direct operator of Chestnut.","official_url":"https://www.cimgroup.com/"},{"relationship":"Solar and storage EPC contractor","name":"SOLV Energy","detail":"Described as a major solar EPC company; it awarded BEI Construction technology-infrastructure contracts for Chestnut and other Westlands-area projects.","official_url":"https://www.solvenergy.com/"},{"relationship":"Technology-infrastructure and fiber contractor","name":"BEI Construction","detail":"Reported that SOLV Energy awarded it technology-infrastructure contracts for the Chestnut solar project, with work underway in December 2023.","official_url":"https://beiconstruction.com/"}] — SOLV Energy | Home · confidence: medium
- Commercial parties: [{"relationship":"Project entity and operator","name":"Chestnut Westside LLC","detail":"Named by EIA-based plant records as the operator of Chestnut and identified in the Amazon litigation as the Chestnut project entity. The litigation also refers to Chestnut selling tangible and intangible assets, without identifying the buyer or consideration.","official_url":null},{"relationship":"Recorded post-transfer site owner and transmission-service counterparty","name":"Castanea Project LLC","detail":"Received the project site from Chestnut Westside LLC on March 20, 2023. A FERC notice reported a related transmission-service-agreement transfer from Chestnut to Castanea effective April 8, 2023.","official_url":null},{"relationship":"Predecessor site owner","name":"Westlands Water District","detail":"Acquired the site in December 2002 and transferred it to Chestnut Westside LLC on May 27, 2022.","official_url":"https://wwd.ca.gov/"},{"relationship":"Energy offtaker and contractual counterparty","name":"Amazon Energy LLC","detail":"Agreed to purchase energy from Chestnut and entered into a 15-year power-purchase arrangement in 2021. The arrangement was intended to help Chestnut obtain construction financing.","official_url":null},{"relationship":"Westlands Solar Park developer and affiliated project sponsor","name":"CIM Group","detail":"CIM announced development of the broader Westlands Solar Park and is identified in the project ownership materials as an affiliated sponsor; the available sources do not establish CIM as the direct operator of Chestnut.","official_url":"https://www.cimgroup.com/"},{"relationship":"Solar and storage EPC contractor","name":"SOLV Energy","detail":"Described as a major solar EPC company; it awarded BEI Construction technology-infrastructure contracts for Chestnut and other Westlands-area projects.","official_url":"https://www.solvenergy.com/"},{"relationship":"Technology-infrastructure and fiber contractor","name":"BEI Construction","detail":"Reported that SOLV Energy awarded it technology-infrastructure contracts for the Chestnut solar project, with work underway in December 2023.","official_url":"https://beiconstruction.com/"}] — BEI Construction | Renewables & Technology Infrastructure · confidence: medium
- Commercial parties: [{"relationship":"Project entity and operator","name":"Chestnut Westside LLC","detail":"Named by EIA-based plant records as the operator of Chestnut and identified in the Amazon litigation as the Chestnut project entity. The litigation also refers to Chestnut selling tangible and intangible assets, without identifying the buyer or consideration.","official_url":null},{"relationship":"Recorded post-transfer site owner and transmission-service counterparty","name":"Castanea Project LLC","detail":"Received the project site from Chestnut Westside LLC on March 20, 2023. A FERC notice reported a related transmission-service-agreement transfer from Chestnut to Castanea effective April 8, 2023.","official_url":null},{"relationship":"Predecessor site owner","name":"Westlands Water District","detail":"Acquired the site in December 2002 and transferred it to Chestnut Westside LLC on May 27, 2022.","official_url":"https://wwd.ca.gov/"},{"relationship":"Energy offtaker and contractual counterparty","name":"Amazon Energy LLC","detail":"Agreed to purchase energy from Chestnut and entered into a 15-year power-purchase arrangement in 2021. The arrangement was intended to help Chestnut obtain construction financing.","official_url":null},{"relationship":"Westlands Solar Park developer and affiliated project sponsor","name":"CIM Group","detail":"CIM announced development of the broader Westlands Solar Park and is identified in the project ownership materials as an affiliated sponsor; the available sources do not establish CIM as the direct operator of Chestnut.","official_url":"https://www.cimgroup.com/"},{"relationship":"Solar and storage EPC contractor","name":"SOLV Energy","detail":"Described as a major solar EPC company; it awarded BEI Construction technology-infrastructure contracts for Chestnut and other Westlands-area projects.","official_url":"https://www.solvenergy.com/"},{"relationship":"Technology-infrastructure and fiber contractor","name":"BEI Construction","detail":"Reported that SOLV Energy awarded it technology-infrastructure contracts for the Chestnut solar project, with work underway in December 2023.","official_url":"https://beiconstruction.com/"}] — Westlands Water District: Home · confidence: medium
- Timeline.0: {"event":"Predecessor site acquisition","date":"2002-12","detail":"Westlands Water District acquired the project site in lieu of eminent domain to retire the land from irrigated agriculture."} — Castanea Project LLC Williamson Act re-enrollment · confidence: medium
- Timeline.1: {"event":"Project construction plan","date":"2020","detail":"The Kings County environmental filing described a 150 MW solar generating station, 230-kV substation, and planned 12-month construction period commencing in 2020."} — Chestnut Solar Project · confidence: medium
- Timeline.2: {"event":"Amazon offtake and financing arrangement","date":"2021","detail":"Amazon entered into a 15-year power-purchase arrangement for energy from Chestnut and the related Solar Blue project; Chestnut intended to use the agreement to obtain financing for construction."} — Amazon's Suit Over Soured Solar Deals Survives Dismissal · confidence: medium
- Timeline.3: {"event":"Recorded site acquisition by Chestnut Westside","date":"2022-05-27","detail":"Westlands Water District transferred the project site to Chestnut Westside LLC by recorded grant deed."} — Castanea Project LLC Williamson Act re-enrollment · confidence: high
- Timeline.4: {"event":"Exempt-wholesale-generator filing","date":"2023-01-13","detail":"Chestnut Westside LLC filed a notice of self-certification of exempt wholesale generator status with FERC."} — Federal Register, Volume 88 Issue 13 (Friday, January 20, 2023) · confidence: high
- Timeline.5: {"event":"Recorded site transfer to Castanea Project","date":"2023-03-20","detail":"Chestnut Westside LLC transferred the project site to Castanea Project LLC by recorded grant deed."} — Castanea Project LLC Williamson Act re-enrollment · confidence: high
- Timeline.6: {"event":"Transmission-service transfer","date":"2023-04-08","detail":"A FERC notice reported a second amended transmission service agreement transferring the Chestnut arrangement from Chestnut to Castanea Project LLC, effective April 8, 2023."} — Combined Notice of Filings #1 · confidence: high
- Timeline.7: {"event":"Construction-related technology work","date":"2023-12-18","detail":"BEI Construction reported that SOLV Energy had awarded it technology-infrastructure contracts for the Chestnut project and that the work was underway."} — SOLV Energy chooses BEI Construction for fiber installation - BEI Construction · confidence: high
- Timeline.9: {"event":"Undated project-asset sale referenced in litigation","date":null,"detail":"The California appellate opinion records that Chestnut sold all of its tangible and intangible assets in connection with exiting the Amazon contract. The opinion does not identify the buyer, transaction consideration, or transaction month and year."} — Source · confidence: medium
- Commercial parties.1: {"relationship":"Recorded post-transfer site owner and transmission-service counterparty","name":"Castanea Project LLC","detail":"Received the project site from Chestnut Westside LLC on March 20, 2023. A FERC notice reported a related transmission-service-agreement transfer from Chestnut to Castanea effective April 8, 2023.","official_url":null} — Castanea Project LLC Williamson Act re-enrollment · confidence: medium
- Commercial parties.1: {"relationship":"Recorded post-transfer site owner and transmission-service counterparty","name":"Castanea Project LLC","detail":"Received the project site from Chestnut Westside LLC on March 20, 2023. A FERC notice reported a related transmission-service-agreement transfer from Chestnut to Castanea effective April 8, 2023.","official_url":null} — Combined Notice of Filings #1 · confidence: medium
- Commercial parties.2: {"relationship":"Predecessor site owner","name":"Westlands Water District","detail":"Acquired the site in December 2002 and transferred it to Chestnut Westside LLC on May 27, 2022.","official_url":"https://wwd.ca.gov/"} — Castanea Project LLC Williamson Act re-enrollment · confidence: high

## Timeline

- 2020 — Project construction plan
  The Kings County environmental filing described a 150 MW solar generating station, 230-kV substation, and planned 12-month construction period commencing in 2020.
  Source: Chestnut Solar Project (https://ceqanet.lci.ca.gov/2019089051/2)
- 2023-03-20 — Recorded site transfer to Castanea Project
  Chestnut Westside LLC transferred the project site to Castanea Project LLC by recorded grant deed.
  Source: Castanea Project LLC Williamson Act re-enrollment (https://ceqanet.lci.ca.gov/2023060761)
- 2023-12-18 — Construction-related technology work
  BEI Construction reported that SOLV Energy had awarded it technology-infrastructure contracts for the Chestnut project and that the work was underway.
  Source: SOLV Energy chooses BEI Construction for fiber installation - BEI Construction (https://beiconstruction.com/solv-energy-chooses-bei-construction-for-fiber-installation/)

## Sources

- [Public Queue Report](https://www.caiso.com/documents/publicqueuereport.xlsx) — caiso.com · tier other
- [CAISO Resource Visibility Template](https://www.caiso.com/documents/caiso-resource-visibility-template.xlsx) — caiso.com · tier other
- [Cross-Reference Table](https://www.energy.ca.gov/sites/default/files/2025-04/Energy_Commission_Power_Plant_ID_Cross_Reference_Table_2024.xlsx) — energy.ca.gov · tier regulatory
- [Chestnut Solar Project](https://ceqanet.lci.ca.gov/2019089051/2) — ceqanet.lci.ca.gov · tier regulatory
- [Westlands Solar Park, One of the Largest Permitted Solar Parks in the World and the Largest in North America, Starts Construction](https://www.cimgroup.com/press-releases/westlands-solar-park-one-of-the-largest-permitted-solar-parks-in-the-world-and-the-largest-in-north-america-starts-construction) — cimgroup.com · tier other
- [Source](https://www.sec.gov/Archives/edgar/data/1765107/000162828023013725/exhibit211-form10x12.htm) — sec.gov · tier regulatory
- [Castanea Project LLC Williamson Act re-enrollment](https://ceqanet.lci.ca.gov/2023060761) — ceqanet.lci.ca.gov · tier regulatory
- [Source](https://caiso.com/documents/publicqueuereport.xlsx) — caiso.com · tier other
- [Source](https://caiso.com/documents/caiso-resource-visibility-template.xlsx) — caiso.com · tier other
- [Source](https://files.ceqanet.lci.ca.gov/254632-2/attachment/d9yw7BmbdnIcLRpuqTP-1J_nqkQ6HHBLYqMHBfcWMTDvGeJDPQVqHaC_jYS0NqO9gZC_1HaJ7VtrZYl20) — files.ceqanet.lci.ca.gov · tier regulatory
- [Chestnut | Kings County, California - Blymyer Engineers](https://blymyerengineers.com/project/chestnut-kings-county-california/) — blymyerengineers.com · tier other
- [Megapack](https://www.tesla.com/megapack) — tesla.com · tier other
- [Source](https://syfert.com/california/cases/cl-10370763/chestnut-westside-v-amazon-energy-ca5) — syfert.com · tier other
- [Amazon's Suit Over Soured Solar Deals Survives Dismissal](https://www.law360.com/articles/2332562/amazon-s-suit-over-soured-solar-deals-survives-dismissal) — law360.com · tier other
- [Federal Register, Volume 88 Issue 13 (Friday, January 20, 2023)](https://www.govinfo.gov/content/pkg/FR-2023-01-20/html/2023-01065.htm) — govinfo.gov · tier regulatory
- [Combined Notice of Filings #1](https://www.federalregister.gov/documents/2023/04/13/2023-07778/combined-notice-of-filings-1) — federalregister.gov · tier regulatory
- [SOLV Energy chooses BEI Construction for fiber installation - BEI Construction](https://beiconstruction.com/solv-energy-chooses-bei-construction-for-fiber-installation/) — beiconstruction.com · tier other
- [SOLV Energy | Home](https://www.solvenergy.com/) — solvenergy.com · tier other
- [BEI Construction | Renewables & Technology Infrastructure](https://beiconstruction.com/) — beiconstruction.com · tier other
- [Westlands Water District: Home](https://wwd.ca.gov/) — wwd.ca.gov · tier regulatory
- [CIM Group | An Alternative Approach to Creating Value](https://www.cimgroup.com/) — cimgroup.com · tier other
- [ORIGINAL 2023](https://files.ceqanet.lci.ca.gov/289095-1/attachment/iLb6_RphgwGMndffo0EZ1jliyrpa7p396DteR2su-doWOb_e-PnTDzN5_S34IYWiRRGvPn8apJoZ_RTe0) — files.ceqanet.lci.ca.gov · tier regulatory
- [2026 NQC List](https://www.caiso.com/documents/net-qualifying-capacity-report-for-compliance-year-2026.xlsx) — caiso.com · tier other
- [Meter Exemptions 2026](https://www.caiso.com/documents/metering-exemption-listing-report-2026.pdf) — caiso.com · tier other

## Data quality

- The May 2022 and March 2023 transactions are recorded transfers of the project site. The litigation separately refers to Chestnut selling tangible and intangible project assets, but the retrieved opinion does not identify the buyer, sale consideration, or sale date for that broader asset transaction. The $24 million disclosed in the litigation was cash collateral posted with a bank to underwrite the Amazon agreement. It should not be treated as project-financing principal or sale consideration. Available EIA records list two operational generators and zero planned generators; no expansion, retirement, or repowering milestone was identified. Battery duration or equipment counts are not inferred from MW figures.

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Canonical page: https://askthegrid.com/assets/facilities/chestnut

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