---
title: "Balancing Services Volume"
method: GET
path: "/gb/elexon/dynamic/qas"
tags: ["Elexon"]
---

# Balancing Services Volume

`GET /gb/elexon/dynamic/qas`

This endpoint provides Balancing Services Volume data received from NGESO. Balancing Services Volume is a volume which is received from the System Operator, which represents the volume of energy (MWh) associated with the provision of Applicable Balancing Services for each relevant BM Unit and Settlement Period. QAS can be positive or negative and is normally only provided where there is a non-zero volume.

## Query parameters

- `date_from` string, date-time, required
- `date_to` string, date-time, required
- `bm_unit` string
- `settlement_period` integer
- `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` ElexonQAS[], required
    - `dataset` string
    - `settlementDate` string, date
    - `settlementPeriod` integer
    - `bmUnitApplicableBalancingServicesVolume` number
    - `nationalGridBmUnit` string
    - `bmUnit` string

## 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/versions/6c4b83d3fc12/schema)