Submitting a baseline
1. Navigate to the "Performance Verification" page.
2. Select the “Baselines” tab.
3. Create a baseline CSV file using the appropriate methodology.
4. Click "Select or drop file".
5. Select your CSV file and click open.
6. Select “Upload Baselines”.
7. You'll then see confirmation that the CSV has been submitted successfully at the top of the page.
When to submit a baseline
To comply with UK standards, a baseline must now be submitted ahead of your offer.
If you need to revise your data due to changing asset conditions, please submit your new baseline by 12:00 day-ahead of delivery.
Please note that any submissions after this deadline may not be eligible for settlement unless authorised by the market operator.
Choosing a baseline methodology
Depending on the market operator, you may be required to use a specific baseline format.
Market Operator | Methodology |
SSEN | Use nominated baseline (day-ahead markets only) |
SPEN | Use default baseline |
SP-ENW | Use default baseline |
Calculating a default baseline
Your default baseline type is defined by the asset technology type, metering point and asset scale (domestic or industrial and commercial).
Domestic Assets
I&C Assets
A "Fixed Reference" baseline is a half-hourly profile over a 24-hour period defined by the DNO. This is defined per individual domestic asset.
To calculate your total baseline, you'll need to:
Download the correct fixed reference value, based on which DNO's markets your asset is participating in, the asset technology type, and the metering point.
Review how many DERs (group members) are in your group.
Multiply each half-hourly fixed reference value by the number of DERs.
Download the blank "Baseline Submission Template" by selecting "CSV Template."
Fill in the ElectronConnect CSV template, using the aggregated fixed reference values.
Submit the csv file to the platform.
Zero or Asset Capacity baselines require a fixed value over the entire delivery period.
For domestic generation assets with Point of Connection metering, providing a Demand Turn-Up or Generation Turn Down service, you must add your group's total capacity to the Flexible Site Demand Fixed Reference baseline.
Fixed reference values
SP Energy Networks (SPEN) and SP Electricity North West (SP-ENW)
Please note that SPEN and SP-ENW use the same fixed reference baseline values.
Technology Type | Metering Point | Baseline file |
EV (DSR or V2G) | Asset Level |
|
EV (DSR or V2G) | Point of Connection |
|
Heat Pump (all types) | Asset Level |
|
Heat Pump (all types) | Point of Connection |
|
Flexible Site Demand | All |
Scottish and Southern Electricity Networks (SSEN)
Please note that:
For day-ahead markets, you can upload nominated or default baselines to ElectronConnect.
For all other markets, baselines must be submitted directly to SSEN via [email protected] before the service start date.
SSEN does not yet enforce the use of fixed reference baselines for any market type.
Technology Type | Metering Point | Baseline file |
EV (DSR or V2G) | Asset Level | |
EV (DSR or V2G) | Point of Connection | |
Heat Pump (all types) | Asset Level | |
Heat Pump (all types) | Point of Connection | |
Flexible Site Demand | All |
Using an alternative (nominated) baseline
If your asset category requires you to upload a fixed reference, zero, or asset capacity baseline, but you prefer to submit a nominated baseline, you may do so by following these steps:
Submit your nominated baseline: Upload your data via CSV to the platform.
Notify us: Send a justification document to [email protected]. To help us process this and understand your requirements, please include:
DNO Name
Justification for the alternative baseline, including your methodology, key assumptions, and any relevant supporting data.
Scope: Please specify if this justification applies to specific assets or markets, or if you would like it to apply to all your assets across the platform moving forward.
For more information on justification requirements, refer to Elexon's Flexibility Market Rule.
Calculating a nominated baseline
To submit a nominated baseline, download the blank "Baseline Submission Template" by selecting "CSV Template."
Use the Baseline Submission Guidance File for support with populating the Baseline Submission Template. Following the guidance file, fill out the baselines upload template and save it as a CSV file.