Case Study: a leading UK energy supplier achieves MHHS regulatory compliance with Resillion

a leading UK energy supplier achieves MHHS compliance with Resillion across millions of half-hourly data points

A leading UK energy supplier faced the challenge of achieving compliance with Ofgem's Market-Wide Half-Hourly Settlement (MHHS) reform. This required a large-scale technical transformation to accurately process millions of complex half-hourly data points across multiple systems, where any errors risked billing inaccuracies and a loss of customer trust. The supplier partnered with Resillion to deliver scalable testing essential for meeting these regulatory deadlines.

Resillion implemented an end-to-end assurance and testing approach, validating all APIs, interfaces, and integrations across the full settlement journey. This solution assured MHHS compliance for the energy supplier, protecting their brand reputation and supporting their net-zero goals. The new system provided reliable, up-to-the-minute data that allowed the supplier to better match demand with energy purchasing, leading to cost savings that could be passed on to customers. Resillion's efficient testing strategy also saved the provider significant time and money.