Onshore Generator Tariffs

This data file contains the TNUoS tariffs related to Onshore Generation, broken down into System Peak, Shared Year-Round, Not Share Year-Round, Residual & Small Generator Discount. This file will be updated on a quarterly basis (when tariffs are published), to receive auto updates please register and subscribe to the TNUoS Tariffs Dataset.

NOTE: As part of our ongoing efforts to align with data management best practices and improve consistency across datasets, the below column ids for this datafile will be updated on 19th October 2026 as follows:
SystemPeak_£/kW → SystemPeak GBP per kW
SharedYearRound_£/kW → SharedYearRound GBP per kW
NotSharedYearRound_£/kW → NotSharedYearRound GBP per kW
Residual_£/kW → Residual GBP per kW
SmallGenDiscount_£/kW → SmallGenDiscount GBP per kW

CKAN Data API

Access resource data via a web API with powerful query support.
Further information in the main CKAN Data API and DataStore documentation.

The Data API can be accessed via the following actions of the CKAN action API.

Query
`https://api.neso.energy/api/3/action/datastore_search`
Query (via SQL)
`https://api.neso.energy/api/3/action/datastore_search_sql`

Query example (first 5 results)
`https://api.neso.energy/api/3/action/datastore_search?resource_id=ffc0adb8-5426-474e-94a3-a5f3f01a0cdb&limit=5`
Query example (via SQL statement)
`https://api.neso.energy/api/3/action/datastore_search_sql?sql=SELECT * from "ffc0adb8-5426-474e-94a3-a5f3f01a0cdb" LIMIT 5`

A simple ajax (JSONP) request to the data API using jQuery.

var data = {
  resource_id: 'ffc0adb8-5426-474e-94a3-a5f3f01a0cdb', // the resource id
  limit: 5 // get 5 results
};
$.ajax({
  url: 'https://api.neso.energy/api/3/action/datastore_search',
  data: data,
  dataType: 'jsonp',
  success: function(data) {
    alert('Total results found: ' + data.result.total)
  }
});

A simple ajax (JSONP) request to the data API using jQuery.

import urllib2
  url = 'https://api.neso.energy/api/3/action/datastore_search?resource_id=ffc0adb8-5426-474e-94a3-a5f3f01a0cdb&limit=5'
  fileobj = urllib2.urlopen(url)
  print fileobj.read()

Download (CSV)

Data Explorer

Table Information

Publication

Title	Publication
Type	string
Description	States what publication type the tariff relates to
Comment	Tariff Publication (Forecast, Draft or Final)
Example	Forecast
Unit

Year_FY

Title	Financial Year
Type	integer
Description	Year in which the tariff relates to i.e. 2021 = 1 April 2020 to 31 March 2021
Comment	Year in which the tariff relates to i.e. 2021 = 1 April 2020 to 31 March 2021 (2020/21)
Example	2021
Unit

Published_Date

Title	Published Date
Type	date
Description	Date tariffs were published
Comment	Example would be that the 2021 Final tariffs we published 31 January 2020 (30/01/2020)
Example	2020/01/31
Unit

Zone_No

Title	Generation Zone No.
Type	integer
Description	Number Assigned to the Generation Zone 1 - 27
Comment
Example	1
Unit

Zone_Name

Title	Generation Zone Name
Type	string
Description	Name of Generation Zone
Comment
Example	North Scotland
Unit

SystemPeak GBP per kW

Title	System Peak Tariff
Type	number
Description	System Peak in £/kW
Comment
Example	1.234567
Unit	£ per kW

SharedYearRound GBP per kW

Title	Shared Year-Round Tariff
Type	number
Description	Shared Year-Round in £/kw
Comment
Example	20.876589
Unit	£ per kW

NotSharedYearRound GBP per kW

Title	Not Shared Year-Round Tariff
Type	number
Description	Not Shared Year-Round in £/kw
Comment
Example	15.013811
Unit	£ per kW

Residual GBP per kW

Title	Generation Residual Tariff
Type	number
Description	Generation Residual Tariff in £/kw
Comment
Example	-4.849145
Unit	£ per kW

SmallGenDiscount GBP per kW

Title	Small Generator Discount Tariff
Type	number
Description	Small Generator Discount Tariff in £/kw
Comment
Example	11.545625
Unit	£ per kW

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Onshore Generator Tariffs

CKAN Data API

Data Explorer

Data Explorer

Table Information

Publication

Year_FY

Published_Date

Zone_No

Zone_Name

SystemPeak GBP per kW

SharedYearRound GBP per kW

NotSharedYearRound GBP per kW

Residual GBP per kW

SmallGenDiscount GBP per kW