In December 2020, Project LEO, working with the SSEN TRANSITION project conducted a short study that identified 26 commercial areas which would benefit from feedback.

An evaluation to rank these 26 commercial areas identified six (6) Minimum Viable System (MVS) trials that would benefit from input from LEO partners during the first six months of 2021. One of these six trials was Commercial MVS D4, which took place during June 2021 to assess three commercial areas:

• The accuracy of the partners forecasting (at month ahead, week ahead and day ahead) and how it may change over time;
• The application of the historic baseline methodology; and,
• The suitability of two potential settlement mechanisms: Option 1 has two large step changes (at 50 and 90% of the Forecasted Flexibility Delivered) and Option 2 has three straight-line representations (at 50, 85 and 95% of the Forecasted Flexibility Delivered; linearly derived).

These areas were tested via a series of flexibility events, during which each of the LEO Distributed Energy Resources (DERs) would either manually or automatically provide a pre-specified amount of flexibility for one hour and then submitted a range of supporting data.

The volume of data collected by participants throughout each of these events was substantial and allowed the project to test and verify their Baseline and Settlement model ahead of their first Trials Period.