MHHS - InkwellData

MHHS

A collection of 2 posts

MHHS and the UK Grid (Part 2) - From Transparency to Deterministic Coordination

MHHS and the UK Grid (Part 2) - From Transparency to Deterministic Coordination

In Part 1, we examined how Market-wide Half-Hourly Settlement (MHHS) replaces statistical profiling with explicit half-hourly allocation. Demand, imbalance exposure and flexibility value are now determined by measured interval performance rather than inferred portfolio averages. That reform introduces clarity. But clarity does not, in itself, ensure control. The structural consequence

MHHS and the UK Grid: Why Half-Hourly Settlement Is a Market Architecture Shift

MHHS and the UK Grid: Why Half-Hourly Settlement Is a Market Architecture Shift

We are now less than eight months from October 2026, when the majority of meters will have migrated to Market-wide Half-Hourly Settlement (MHHS). MHHS is often described as a billing reform. In practice, it represents a structural shift in how the UK electricity market allocates cost, risk and flexibility value.