Topaz Solar Farm — 586 MW solar farm, CA

Topaz Solar Farm — 586 MW solar farm, CA · Ask the Grid

Generation and physical site

EIA plant 57695 · Inventory for Aug 2026.

Reported operating nameplate by technology

Solar: 585.9 MW

Operating generators only. Battery power is in MW; stored energy is in MWh. These ratings do not establish a shared export limit.

Generator records (5)

EIA generator status and nameplate capacity for Topaz Solar Farm
Generator	Technology	Status	Power (MW)	Energy (MWh)
TPZ1	Solar Photovoltaic	Operating	129.8	Unknown
TPZ2	Solar Photovoltaic	Operating	151.2	Unknown
TPZ3	Solar Photovoltaic	Operating	102.1	Unknown
TPZ4	Solar Photovoltaic	Operating	90.3	Unknown
TPZ5	Solar Photovoltaic	Operating	112.5	Unknown

Physical map location · OpenStreetMap: 35.36932, -120.04252
Filed location · EIA: 35.40556, -120.06860

Sources and observation dates

Inventory source: EIA-860M workbook (preliminary)
EIA reporting month: Aug 2026
EIA retrieved: Oct 10, 2026
OSM extract: Oct 9, 2026
OSM last mapped edit: Nov 18, 2023
Map prepared: Oct 10, 2026
Field verification: Not reported

Reporting month describes the inventory. Retrieval and map preparation describe processing; an OSM edit does not establish an in-service date.

EIA source inventory

Units and generators

Operating generator records and technology attributes reported through EIA-860.

Generator	Capacity	Technology	Operation	Status
TPZ1	129.8 MW 129.8 MW summer	Solar Photovoltaic Solar · PV	Apr 2013	Operating
TPZ2	151.2 MW 151.2 MW summer	Solar Photovoltaic Solar · PV	Jun 2013	Operating
TPZ3	102.1 MW 102.1 MW summer	Solar Photovoltaic Solar · PV	Jan 2014	Operating
TPZ4	90.3 MW 90.3 MW summer	Solar Photovoltaic Solar · PV	Nov 2014	Operating
TPZ5	112.5 MW 112.5 MW summer	Solar Photovoltaic Solar · PV	Oct 2014	Operating

Commercial, land, and environmental record

Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.

Financing

Feb 2012

Topaz Solar Farms issued $850 million of 5.75% Series A Senior Secured Notes to fund development, construction, and financing costs. The notes amortize beginning September 2015 and mature in September 2039.

$850.0MTopaz Solar Farms LLC

sec.gov

Transactions and agreements

Regulatory Approval

Aug 21, 2009

The California Public Utilities Commission approved the first amendment to the Topaz Solar Farms LLC and PG&E power purchase agreement, effective February 25, 2010, for 550 MW of photovoltaic capacity.

Pacific Gas and Electric Company · Topaz Solar Farms LLC · California Public Utilities Commission

pge.com

Acquisition Announcement

Dec 7, 2011

MidAmerican Energy Holdings Company announced definitive agreements to acquire the 550 MW Topaz Solar Farm from First Solar, Inc. First Solar agreed to construct, operate, and maintain the project. The project was valued at more than $2 billion.

MidAmerican Energy Holdings Company · First Solar, Inc.

s202.q4cdn.com

Construction Began

Nov 2011

Construction of the Topaz project commenced under a fixed-price, date-certain, turnkey engineering, procurement, and construction contract with a First Solar subsidiary.

First Solar, Inc.

s202.q4cdn.com

Acquisition Completion

Jan 2012

MidAmerican Energy Holdings Company, through a wholly owned subsidiary, completed the acquisition of Topaz Solar Farms LLC and the 550 MW solar project from a First Solar subsidiary.

MidAmerican Energy Holdings Company · First Solar, Inc.

sec.gov

Capacity Placed In Service

2012

First phase of 45 MW placed in service in 2012 as part of the phased 22-block construction program.

Topaz Solar Farms LLC

sec.gov

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Aug 21, 2009
Aug 21, 2009
CPUC approves amended Topaz PPApge.com
The California Public Utilities Commission approved the first amendment to the Topaz Solar Farms LLC and PG&E power purchase agreement, effective February 25, 2010, for 550 MW of photovoltaic capacity.
Nov 2011
Nov 2011
Topaz Construction Beginss202.q4cdn....
Construction of the Topaz project commenced under a fixed-price, date-certain, turnkey engineering, procurement, and construction contract with a First Solar subsidiary.
Dec 7, 2011
Dec 7, 2011
MidAmerican announces Topaz acquisition from First Solars202.q4cdn....
MidAmerican Energy Holdings Company announced definitive agreements to acquire the 550 MW Topaz Solar Farm from First Solar, Inc. First Solar agreed to construct, operate, and maintain the project. The project was valued at more than $2 billion.
View 8 more milestonesHide 8 milestones
1. 2012
  2012
  First 45 MW placed in servicesec.gov
  First phase of 45 MW placed in service in 2012 as part of the phased 22-block construction program.
2. Jan 2012
Oct 2014
Oct 2014
Generator enters operationEIA-860
EIA-860 lists generator TPZ5 with this operating date.
Nov 2014
Nov 2014
Generator enters operationEIA-860
EIA-860 lists generator TPZ4 with this operating date.
2015
2015
Final 53 MW placed in service and project completedsec.gov
Final phase of 53 MW placed in service in 2015; final completion achieved in February 2015.

Sources

PublisherReferenceType

U.S. Energy Information AdministrationEIA-860 generator inventoryFederal registry

U.S. Energy Information AdministrationEIA-923 generation filingsFederal filing

federalregister.govfederalregister.govauthoritative

Common questions about Topaz Solar Farm

Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.

How big is Topaz Solar Farm?

Topaz Solar Farm reports 585.9 MW solar of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Aug 2026.

What kind of plant is Topaz Solar Farm?

Topaz Solar Farm is a Solar Photovoltaic facility in San Luis Obispo County, CA, participating in the CAISO market.

Where is Topaz Solar Farm located?

Topaz Solar Farm is in San Luis Obispo County, CA, inside the CAISO balancing area.

Who operates Topaz Solar Farm?

Topaz Solar Farm is operated by Topaz Solar Farms LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Topaz Solar Farm generate?

Topaz Solar Farm reported 974.3 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.

How does Topaz Solar Farm compare to other plants?

By capacity, Topaz Solar Farm ranks #5 of 7,597 operating plants of the same technology nationally. It ranks #1 of 972 in CA.

Co-located assets

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.

California Valley Solar RanchSolar PhotovoltaicSolar Photovoltaic · same type250 MW12 km

Overview

Infrastructure record

Overview

Infrastructure record

Explore related directories

Explore related directories

Structured profile

Generation and physical site

Reported operating nameplate by technology

Related assets

Rexford Solar Farm

Solar Blue

Slate Hybrid

California Valley Solar Ranch

Scarlet II Hybrid

Fifth Standard Solar PV, LLC (Hybrid)

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Market registration

Nearby substations

Commercial, land, and environmental record

Financing

Transactions and agreements

Related parties and identifiers

Parties and identifiers

Reporting portfolio

Timeline and sources

Project timeline

Sources

Common questions about Topaz Solar Farm

How big is Topaz Solar Farm?

What kind of plant is Topaz Solar Farm?

Where is Topaz Solar Farm located?

Who operates Topaz Solar Farm?

How much electricity does Topaz Solar Farm generate?

How does Topaz Solar Farm compare to other plants?

Co-located assets