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Asset classes
- Transmission Line80,968
- Power Plant32,429
- Substation / Converter7,614
- Oil & Gas Field7,055
- Coal / Uranium Mine5,382
- Pipeline4,951
- Cement Plant3,513
- Data Centre3,283
- Iron & Steel Plant1,293
- LNG Terminal1,198
- Grid Storage965
- Iron Ore Mine949
- Chemical Plant868
- Interconnector704
- Export Terminal519
- Refinery279
- Storage / Tank Farm38
- Oil / Commodity Contract19
- Hydrogen Project18
- Carbon Capture (CCS)16
Chokepoints
Asset class
Interconnector
OverWatts maps 704 interconnectors across 104 countries. The United States holds the most — 159, 23% of the world total, ahead of China (81). Operating capacity totals 999 GW. The largest is India - North – India - West interconnection (36.7 GW).
240 more are under construction or proposed, the biggest being China (CH) – China (SC) interconnection (planned) (24.0 GW).
704
Interconnector
104
Countries
159
Most · United States
999 GW
Operating capacity
240
In construction / proposed
Largest interconnectors
- India - North – India - West interconnection36.7 GW
- Brazil (CW) – Brazil (SE) interconnection30.8 GW
- China (GD) – China (YU) interconnection29.7 GW
- Brazil (SE) – Brazil (SO) interconnection25.1 GW
- China (CH) – China (SC) interconnection (planned)24.0 GW · proposed
- India - East – India - North interconnection22.5 GW
- India - East – India - West interconnection21.2 GW
- China (NM) – China (SX) interconnection19.5 GW
- India - South – India - West interconnection18.1 GW
- China (YU) – China (ZH) interconnection15.2 GW
- China (HN) – China (HU) interconnection14.5 GW
- China (GD) – China (SC) interconnection14.4 GW
- China (HE) – China (XI) interconnection14.4 GW
- China (NM) – China (SD) interconnection14.4 GW
- China (HB) – China (HE) interconnection14.3 GW
- Viet Nam – Viet Nam interconnection12.0 GW
- China (HN) – China (SC) interconnection10.5 GW
- United States (US-MIDW-MISO) – United States (US-MIDA-PJM) interconnection10.1 GW
- Brazil (CN) – Brazil (NE) interconnection8.8 GW
- Brazil (SO) – Paraguay interconnection8.8 GW
- China (HB) – China (SD) interconnection8.5 GW
- China (HE) – China (HU) interconnection8.5 GW
- India - North – India - West interconnection (planned)8.4 GW · proposed
- Brazil (CN) – Brazil (SE) interconnection8.0 GW
- China (HE) – China (QI) interconnection8.0 GW
- China (HU) – China (SI) interconnection8.0 GW
- China (JS) – China (SC) interconnection8.0 GW
- China (JX) – China (SC) interconnection8.0 GW
- China (SC) – China (ZH) interconnection8.0 GW
- China (GA) – China (SD) interconnection (planned)8.0 GW · proposed
- China (HN) – China (NI) interconnection (planned)8.0 GW · proposed
- China (HU) – China (SC) interconnection (planned)8.0 GW · proposed
- China (SC) – China (TI) interconnection (planned)8.0 GW · proposed
- India - East – India - South interconnection7.8 GW
- China (AN) – China (JS) interconnection7.5 GW
- China (HU) – China (JX) interconnection7.5 GW
- China (JS) – China (SH) interconnection7.5 GW
- China (GA) – China (JS) interconnection7.2 GW
- China (GU) – China (JS) interconnection7.2 GW
- China (JX) – China (NM) interconnection7.2 GW
- China (NI) – China (ZH) interconnection7.2 GW
- Brazil (CN) – Brazil (CW) interconnection6.8 GW
- China (BE) – China (HB) interconnection6.5 GW
- China (CH) – China (SC) interconnection6.5 GW
- China (HB) – China (NM) interconnection6.5 GW
- China (LI) – China (NM) interconnection6.5 GW
- China (SD) – China (SX) interconnection6.5 GW
- Brazil (SE) – Brazil (WE) interconnection6.3 GW
- China (HN) – China (HU) interconnection (planned)6.0 GW · proposed
- China (GU) – China (YU) interconnection5.5 GW
- China (GX) – China (YU) interconnection5.5 GW
- Laos – Thailand interconnection5.4 GW
- Canada - Newfoundland – Canada - Quebec interconnection5.2 GW
- China (BE) – China (NM) interconnection5.0 GW
- China (HN) – China (SX) interconnection5.0 GW
- China (JS) – China (SD) interconnection5.0 GW
- China (JS) – China (SX) interconnection5.0 GW
- China (HE) – China (HU) interconnection (planned)5.0 GW · proposed
- Egypt – Greece interconnection (planned)5.0 GW · proposed
- France – United Kingdom interconnection (planned)4.9 GW · proposed
- Brazil (NE) – Brazil (SE) interconnection (planned)4.4 GW · proposed
- United States (US-SW-AZPS) – United States (US-SW-SRP) interconnection4.3 GW
- Brazil (CN) – Brazil (CW) interconnection (planned)4.2 GW · proposed
- Switzerland – Germany interconnection4.2 GW
- India - North – India - West interconnection (planned)4.2 GW · proposed
- India - South – India - West interconnection (planned)4.2 GW · proposed
- India - South – India - West interconnection (planned)4.2 GW · proposed
- Ethiopia – Sudan interconnection4.0 GW
- China (AN) – China (HB) interconnection4.0 GW
- China (CH) – China (HB) interconnection4.0 GW
- China (JS) – China (SI) interconnection4.0 GW
- China (NI) – China (SD) interconnection4.0 GW
- China (NM) – China (TJ) interconnection4.0 GW
- Austria – Germany interconnection (planned)4.0 GW · proposed
- Germany – Netherlands interconnection4.0 GW
- Argentina – Uruguay interconnection3.9 GW
- Mozambique – South Africa interconnection3.9 GW
- Switzerland – Italy interconnection3.8 GW
- Switzerland – France interconnection3.7 GW
- Germany – Denmark interconnection3.7 GW
- Norway – Sweden interconnection3.7 GW
- Russia - Central Federal District – Russia - Volga Federal District interconnection3.5 GW
- Viet Nam – Viet Nam interconnection (planned)3.5 GW · proposed
- India - North – Nepal interconnection (planned)3.5 GW · proposed
- Argentina – Paraguay interconnection3.3 GW
- Russia - Siberian Federal District – Russia - Ural federal district interconnection3.3 GW
- Brazil (NE) – Brazil (SE) interconnection3.3 GW
- United States (US-NY-NYIS) – United States (US-MIDA-PJM) interconnection3.3 GW
- United States (US-SW-AZPS) – United States (US-CAL-CISO) interconnection (planned)3.2 GW · proposed
- United States (US-CAL-CISO) – United States (US-CAL-LDWP) interconnection3.2 GW
- France – Italy interconnection3.1 GW
- United States (US-NW-BPAT) – United States (US-CAL-LDWP) interconnection3.0 GW
- India - Northeast – India - North interconnection3.0 GW
- Germany – France interconnection3.0 GW
- France – United Kingdom: IFA, IFA2, ElecLink3.0 GW
- Russia - Volga Federal District – Russia - Ural federal district interconnection3.0 GW
- Indonesia – Indonesia interconnection (planned)3.0 GW · proposed
- Egypt – Saudi Arabia interconnection (planned)3.0 GW · proposed
- United States (US-SW-AZPS) – United States (US-SW-PNM) interconnection (planned)3.0 GW · proposed
- United States (US-TEX-ERCO) – United States (US-TEN-TVA) interconnection (planned)3.0 GW · proposed
- United States (US-CAL-LDWP) – United States (US-NW-PACE) interconnection (planned)3.0 GW · proposed
- Canada - Manitoba – United States (US-MIDW-MISO) interconnection3.0 GW
- United States (US-MIDW-MISO) – United States (US-TEN-TVA) interconnection2.9 GW
- United States (US-NW-BPAT) – United States (US-NW-PSEI) interconnection2.9 GW
- Brazil (CN) – Brazil (NW) interconnection2.9 GW
- India - East – India - Northeast interconnection2.9 GW
- Kyrgyzstan – Uzbekistan interconnection2.8 GW
- Belgium – France interconnection2.8 GW
- Spain – France interconnection2.8 GW
- Kazakhstan – Kyrgyzstan interconnection2.8 GW
- Japan (CE) – Japan (KY) interconnection2.8 GW
- Canada - Ontario – Canada - Quebec interconnection2.8 GW
- Belarus – Russia - Central Federal District interconnection2.7 GW
- Spain – Portugal interconnection2.7 GW
- Austria – Germany interconnection (planned)2.7 GW · proposed
- Japan (CE) – Japan (SH) interconnection2.6 GW
- Cambodia – Laos interconnection2.6 GW
- United States (US-NW-BPAT) – United States (US-CAL-CISO) interconnection2.5 GW
- China (AN) – China (ZH) interconnection2.5 GW
- China (BE) – China (TJ) interconnection2.5 GW
Largest under construction & proposed
- China (CH) – China (SC) interconnection (planned)24.0 GW · proposed
- India - North – India - West interconnection (planned)8.4 GW · proposed
- China (GA) – China (SD) interconnection (planned)8.0 GW · proposed
- China (HN) – China (NI) interconnection (planned)8.0 GW · proposed
- China (HU) – China (SC) interconnection (planned)8.0 GW · proposed
- China (SC) – China (TI) interconnection (planned)8.0 GW · proposed
- China (HN) – China (HU) interconnection (planned)6.0 GW · proposed
- China (HE) – China (HU) interconnection (planned)5.0 GW · proposed
- Egypt – Greece interconnection (planned)5.0 GW · proposed
- France – United Kingdom interconnection (planned)4.9 GW · proposed
- Brazil (NE) – Brazil (SE) interconnection (planned)4.4 GW · proposed
- Brazil (CN) – Brazil (CW) interconnection (planned)4.2 GW · proposed
Interconnector by country
- United States159
- China81
- India23
- Canada22
- Brazil21
- Germany20
- Austria16
- Belgium13
- Bulgaria10
- Italy9
- Hungary9
- Australia9
- Czech Republic8
- Switzerland8
- Argentina7
- Benin7
- Egypt7
- France7
- Greece7
- Bosnia and Herzegovina7
- United Kingdom7
- Spain7
- Kazakhstan6
- Afghanistan6
- Japan6
- Albania6
- Russia6
- Denmark6
- Iran5
- Romania5
- Guatemala5
- Botswana5
- Guinea5
- Laos5
- Mozambique4
- Burkina Faso4
- Georgia4
- Armenia4
- Indonesia4
- Iraq4
- Costa Rica4
- Honduras4
- Colombia4
- Croatia4
- Lithuania4
- Montenegro4
- Estonia4
- Malaysia3
- Ethiopia3
- Kyrgyzstan3
- Kenya3
- Cambodia3
- Moldova3
- Côte d'Ivoire3
- Algeria3
- Mexico3
- Kosovo3
- Belarus3
- Poland3
- Finland3
Frequently asked
- How many interconnectors are there in the world?
- OverWatts maps 704 interconnectors across 104 countries, from open datasets.
- Which country has the most interconnectors?
- The United States, with 159 — 23% of the world total. Then China (81) and India (23).
- What is the largest interconnector in the world?
- India - North – India - West interconnection, at 36.7 GW.
- How much capacity do the world's interconnectors have?
- About 999 GW operating, with a further 327 GW under construction or proposed.