What do we vary in the Run Library?

• Duration: 1 hour, 2 hours, 4 hours
• GSP Region: Eastern, East Midlands, London, Merseyside & North Wales, Midlands, Northern, North of Scotland, North Western, South Eastern, Southern, South of Scotland, South Wales, South Western, Yorkshire
• Max Cycles: 1, 1.5, 2, 2.5 per day
• Macro Scenario: Central, Low, High Scenario
• Start Date: 01/01/2025
• Connection Type: Distribution, Transmission
• Degradation: Off, On
• Re-powering: After 10,000 cycles
• Round-trip Efficiency: 88%
• Optimisation strategy: merchant focussed, or ancillaries focussed

What is included in each file?

Each file displays the input parameters at the top and then breaks down outputs to a monthly and yearly granularity.

Outputs include the average number of cycles per day, average wholesale day-ahead price, revenues broken down by market, and total revenues.

We really recommend using a custom run for forecasting a specific site as it's unlikely these examples will replicate the specifics of your site.

50MW sites: why?

There used to be a planning rule that meant you needed central government planning for sites above 50MW. This meant that many of the sites that got built were 50MW (or just under).

In Feb 2024, more of the fleet is 50MW than any other size (25% of the total number of sites we track).

So, our 'usual' run is a battery of 50MW; the forecast is built with sites of this size in mind.

As ever, if something is missing that you'd like to see, please let us know.