Editing Solar Energy Generating Systems (section)

{{Short description|Concentrated solar thermal power station in the Mojave Desert of California}}
{{redirect|SEGS|the airport with that ICAO code|Seymour Airport}}
{{Infobox power station
| name                    = Solar Energy Generating Systems
| image                   = Solar Plant kl.jpg
| image_caption           = Part of the 354 MW SEGS solar complex in northern San Bernardino County, California. 
| image_alt               = 
| coordinates             = {{coord|35.0316|-117.348|region:US-CA_type:landmark|display=inline,title}}
| country                 = United States
| location                = [[Mojave Desert]]
| status                  = O
| construction_began      = 1983
| commissioned            = 1984
| decommissioned          = 
| cost                    = 
| owner                   = [[NextEra Energy Resources]]
| operator                = 
| solar_type              = CSP
| solar_csp_technology    = P
| solar_concentration     = 
| solar_collectors        = 936,384
| solar_collectors_area   = 
| ps_site_area         = {{convert|1600|acre|ha|1}}
| solar_site_resource     = 2,725 kWh/m<sup>2</sup>/yr
| ps_units_operational    = 2
| ps_units_cancelled      = 
| ps_units_decommissioned = 7
| ps_units_manu_model     = 
| ps_electrical_capacity  = 160
| ps_electrical_cap_fac   = 19.2%
| ps_annual_generation    = 539 GW·h (2015)
| website                 = 
| extra                   = 
}}
{{GeoGroup}}
'''Solar Energy Generating Systems''' ('''SEGS''') is a [[concentrated solar power plant]] in [[California]], United States. With the combined capacity from three separate locations at 354 [[megawatt]] (MW), it was for thirty years the world's [[List of solar thermal power stations|largest]] solar thermal energy generating facility, until the commissioning of the even larger [[Ivanpah Solar Power Facility|Ivanpah facility]] in 2014. It was also for thirty years the world's largest solar generating facility of any type of technology, until the commissioning of the [[photovoltaic]] [[Topaz Solar Farm]] in 2014. It consisted of nine [[solar power plant]]s in California's [[Mojave Desert]], where [[insolation]] is among the best available in the United States.

SEGS I–II (44&nbsp;MW) were located at [[Daggett, California|Daggett]] ({{coord|34|51|45|N|116|49|45|W}}); they have been replaced with a solar photovoltaic farm.

SEGS&nbsp;III–VII (150&nbsp;MW) were installed at Kramer Junction ({{coord|35|00|43|N|117|33|32|W}}); all five SEGS have undergone demolition.<ref>{{Cite web |last= |first= |date= |title=SEGS III – VII - Kramer Junction |url=https://www.energy.ca.gov/powerplant/solar-thermal/segs-iii-vii-kramer-junction |access-date=24 September 2022 |website=California Energy Commission |language=en}}</ref><ref name=cca-press-release /><ref name=sb-resurgence-project />

SEGS VIII–IX (160&nbsp;MW) are located at [[Harper Lake]] ({{coord|35|01|55|N|117|20|50|W}}).<ref name="energy_blog_2005_09">[http://thefraserdomain.typepad.com/energy/2005/09/about_parabolic.html The Energy Blog: About Parabolic Trough Solar<!-- Bot generated title -->]</ref> [[NextEra Energy Resources]] operates and partially owns the plants located at Kramer Junction.  On January 26, 2018, the SEGS VIII and IX at Harper Lake were sold to renewable energy company Terra-Gen, LLC.

A tenth plant (SEGS X, 80&nbsp;MW) had been in construction and SEGS XI and SEGS XII had been planned by [[BrightSource Energy|Luz Industries]], but the developer filed for bankruptcy in 1992, because it was unable to secure construction financing.<ref name="CEC_filing">{{cite web|url=http://www.energy.ca.gov/sitingcases/solar/ |title=Large Solar Energy Projects |publisher = California Energy Commission | archive-url = https://web.archive.org/web/20160714141020/http://www.energy.ca.gov/sitingcases/solar/ | archive-date = 14 July 2016 | url-status = dead|access-date=14 July 2016}}</ref>  The site of SEGS X was later licensed for a solar photovoltaic farm, Lockhart Solar PV II.<ref name=Lockhart>{{cite web |url=http://www.sbcounty.gov/uploads/LUS/Desert/2021-07-14_Lockhart%20Solar%20PV%20II_NOP.pdf |title="2021-07-14 Lockhart Solar PV II NOP"}}</ref>

Most of the thermal facilities were retired by 2021,<ref>{{cite web |last1=Cheah |first1=Cindy |title=World's longest-operating solar thermal facility is retiring most of its capacity - Today in Energy - U.S. Energy Information Administration (EIA) |url=https://www.eia.gov/todayinenergy/detail.php?id=49616 |website=www.eia.gov |archive-url=https://web.archive.org/web/20210926035412/https://www.eia.gov/todayinenergy/detail.php?id=49616 |archive-date=26 September 2021 |date=21 September 2021 |url-status=live}}</ref> and photovoltaics were built on the same sites.