Offtaker

Wiki-Solar

The authority on utility-scale solar power

Maps available for selected companies using pull-down menus above or hyperlinks below

Leading off-takers of utility-scale solar power

The most recently published list of the leading known utility-scale solar power offtakers as at the end of 2018 is shown below.

Rank

Power off-taker

Projects number

Capacity MWAC

1

Solar Energy Corporation of India [IN]

66

3,928

2

Southern California Edison [US]

61

3,075

3

National Thermal Power Corporation [IN]

119

2,579

4

Pacific Gas & Electric [US]

46

2,438

5

Southern Power Distribution Company of Telangana [IN]

76

2,205

6

Northwest China Power Grid [CN]

104

2,107

7

Comisión Federal de Electricidad [MX]

11

1,684

8

San Diego Gas & Electric [US]

28

1,530

9

Los Angeles Department of Water & Power [US]

17

1,196

10

Eskom [ZA]

29

1,182

11

Abu Dhabi Water and Electricity Company (ADWEA) [AE]

2

1,023

12

Sistema Interconectado Central [CL]

10

921

13

Pacific Power [US]

27

894

14

Tangedco [IN]

38

850

15

Xcel Energy [US]

23

799

16

Duke Energy [US]

51

741

17

Gujarat Urja Vikas Nigam (GUVNL) [IN]

52

724

18

NV Energy [US] (now part of: BHE Renewables)

14

702

19

Sistema Interconectado del Norte Grande [CL]

11

614

20

Georgia Power [US]

16

575

21

Delhi Metro Rail Corporation [IN]

3

569

22

Origin Energy [AU]

5

535

23

CPS Energy [US]

11

494

24

Arizona Public Service [US]

15

482

25

North China Power Grid [CN]

27

480

26

Ontario Power Authority [CA]

34

468

27

Compania Administradora del Mercado Mayorista Electrico [AR]

3

423

28

Dubai Electricity and Water Authority [AE]

2

410

29

Florida Power & Light [US] (part of: NextEra Energy)

6

407

30

Provincial Electricity Authority (PEA) [TH]

49

406

Power Purchase Agreements

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.

Utility-owned solar power plant

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.

Basis of the data used

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 19% of the operating capacity on the Wiki-Solar Database (of which these top 30 account for 18%). The total capacity for power off-takers listed may therefore be on average up to 5 times that identified here.

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.

Electricity off-taker

Most utility-scale solar plants feed power into the electricity grid under a Power Purchase Agreement with a utility company

Cotton Centre solar power plant (courtesy McCarthy Building). Arizona Public Service not only takes the power but also owns the plant.