United Kingdom · island electricity systemElectricity in Guernsey
The electricity system of Guernsey: who operates it, how it is supplied, its plants and interconnections, and what the operator publishes.
The arrows and figures are measurements. The transmission grid is not shown: we do not have its routes for this country yet.
Interconnections and submarine cables
The flow on each link is the one published by REE, every five minutes. The diagram is not to scale.
| Project | Flow now | End points | Voltage | Capacity | Length | Cables | In service since | Sources |
|---|---|---|---|---|---|---|---|---|
GJ1 (Guernsey–Jersey) |
no reading |
Guernsey↔ Jersey |
—alternating current |
60 MW |
— |
— |
2000 (înlocuit 2019) |
Guernsey Electricity does not publish the flow on these interconnections in real time; the table shows the verified facts of each link.
Who supplies the electricity?
Who operates, distributes and generates in Guernsey; every line has its official source. Verified on 2026-09-19.
| Role | Company |
|---|---|
System and grid operator |
Guernsey Electricity Ltdgeneration, importation and distribution; States-owned |
Supplier |
Alderney Electricity LtdAlderney — sistem propriu, diesel, fără legătură cu CIEG |
Supplier |
Sark Electricity LtdSark — sistem propriu, diesel; preț plafonat de Price Control Commissioner |
Generators
The operator does not publish a total installed capacity for Guernsey.
- Real-time data: not published. Guernsey Electricity does not publish live demand or generation for Guernsey.
- Periodic publication: Guernsey Electricity — Annual Report & Accounts (annual).
- Market price: none. Guernsey is supplied under a regulated tariff.
- Flows on the interconnections: not published in real time by Guernsey Electricity.
- Data licence: Guernsey Electricity does not state one. The data are shown with attribution and the time of reading and are not redistributed through the API.
Guernsey Electricity · Guernsey Electricity — Annual Report & Accounts
Frequently asked questions
Where do the figures on this page come from?
There are no live figures: Guernsey Electricity does not publish real-time data. The infrastructure facts come from official documents, each with its link, and the periodic figures are in Guernsey Electricity — Annual Report & Accounts.
Is Guernsey connected to another electricity system?
Yes, through: GJ1 (Guernsey–Jersey). The table above gives the voltage, capacity, length and year of each link, with its source.
Is there an electricity market price for Guernsey?
There is no market price for Guernsey: the island is supplied under a regulated tariff, without a wholesale market of its own. No price from another zone is shown here.