Halfcell

Welcome to Halfcell, an interactive analytics tool for grid-scale battery storage markets in Great Britain. Battery energy storage systems (BESS) are a complex part of Great Britain's energy transition; this tool is designed to help unpack how they operate, how they make money, and how market conditions and data science are impacting BESS' role in the grid.

DC High — latest

£/MW/h · 30d avg £

Wholesale spread — latest

£/MWh peak-to-trough · 30d avg £

Modelled revenue — ML strategy

£k

per MW per year · 50 MW / 2h reference asset

Data through

years backtested

What's in this tool

Market Overview →

GB frequency response auction clearing prices (DC, DR, DM), High vs Low spread dynamics, system settlement prices, and generation mix trends.

Forecasting & Dispatch →

A day-ahead modelling framework for FR/arbitrage capacity allocation and MPC dispatch, benchmarking three price forecasting strategies.

Methodology & Data →

Modelling assumptions, data sources, and known limitations of the backtester.

Modelled revenue by strategy

Cumulative net revenue for the reference 50 MW / 2 h asset, across the three forecasting strategies. Perfect Foresight is the ceiling; Naive D-1 is the zero-skill floor; the ML model sits between them.