---
title: "Instantaneous generation outturn by fuel type"
method: GET
path: "/gb/elexon/system/fuelinst"
tags: ["Elexon"]
---

# Instantaneous generation outturn by fuel type

`GET /gb/elexon/system/fuelinst`

This endpoint provides the instantaneous generation outturn (Generation By Fuel type) to give our users an indication of the generation outturn for Great Britain. The data is aggregated by Fuel Type category.

## Query parameters

- `publish_date_from` string, date-time, required
- `publish_date_to` string, date-time, required
- `limit` integer
- `offset` integer
- `timezone` 'UTC' | 'Europe/Berlin' | 'Europe/London' | 'America/New_York' | 'America/Chicago' | 'America/Los_Angeles'

## Response `200`

Success

- object
  - `count` integer, required
  - `next` string, uri, nullable
  - `previous` string, uri, nullable
  - `results` ElexonFUELINST[], required
    - `dataset` string
    - `publishTime` string, date-time, nullable
    - `startTime` string, date-time, nullable
    - `settlementDate` string, date, nullable
    - `settlementPeriod` integer, nullable
    - `fuelType` string
    - `generation` integer, nullable

## Other responses

- `400` — Bad Request
- `401` — Unauthorized
- `403` — Forbidden
- `404` — Not Found
- `429` — Too Many Requests

---

[API](https://skmtc.net/modoenergy/apis/modo-energy-api.md) · [All operations](https://skmtc.net/modoenergy/apis/modo-energy-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/modoenergy/modo-energy-api/revisions/6c4b83d3fc12/schema)