Maps available for selected companies using pull-down menus above or hyperlinks below
San Diego Gas & Electric [US]
Gujarat Urja Vikas Nigam (GUVNL) [IN]
Provincial Electricity Authority (PEA) [TH]
China Southern Power Grid [CN]
NTPC Vidyut Vyapar Nigam (NVVN) [IN]
Arizona Public Service [US]
Puerto Rico Electric Power Authority [PR]
Sistema Interconectado Central [CL]
East China Power Grid [CN]
Kyushu Electric Power [JP]
NV Energy [US] (now part of: MidAmerican Energy)
Chubu Electric Power [JP]
Tucson Electric Power [US]
Madhya Pradesh Power Transmission Company [IN]
Progress Energy [US]
Rajasthan Rajya Vidyut Prasaran Nigam (RVPN) [IN]
The most recently published list of leading utility-scale solar plant owners is shown below.
This shows the situation in March 2013, while the earlier position in December 2012 and detailed in this release. The situation has changed substantially since then and a new list will be published soon.
The output of utility-scale solar power stations is almost always fed into the grid for sale into the bulk electricity market, though a few (often roof-top) plants supply a local electricity user.
Bulk power is sold under a PPA or power purchase agreement with an electricity utility. We refer to this buyer as the 'power off-taker'.
In open markets the plant owner, who is selling the power, may have a choice of off-taker. In regulated markets there may be only one electricity utility operating in the relevant area.
Some utilities own the power stations, rather than buying the power from an indepent power producer.
A map of utility-owned plants is available here.
The data used for the analysis and the table on the left is derived from operating projects of 4MWAC+ on the Wiki-Solar Database, according to these criteria.
Power off-takers are identified against 39% of the operating capacity on the Wiki-Solar Database (of which these top 22 account for 31.2%). The total capacity for power off-takers listed may therefore be on average up to 3 times that identified here (though some do confirm details of their portfolio to Wiki-Solar).
Some off-takers in this list also fulfil other roles in utility-scale projects, and some utilities also own and operate their own plant for example. The figures quoted here apply only to their power purchase activities. Where companies have maps, however, these will show all their projects.
Most utility-scale solar plants feed power into the electricity grid under a Power Purchase Agreement with a utility company