Energy explainers - Helping businesses navigate how the energy system is evolving.

Explore our 2025 annual report summary as we reflect on the financial year 2024/25 and the progress we have made in the months since, recapping our global business activities, highlighting our key achievements, and looking ahead to the future of SmartestEnergy.

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Market-wide Half-Hourly Settlement (MHHS)

Market-wide Half-Hourly Settlement (MHHS) is a major industry-wide reform to how electricity usage is measured and settled.

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GHG Emissions Reporting

GHG Emissions Reporting Explained

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P432

P432 is a process used by Elexon to ensure that all advanced meters equipped with Current Transformers (CTs) are settled on a half-hourly basis.

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Large business

If you're a generator or a commercial and industial (C&I) business, you're in the right place.

Am I a large business?

  • More than 300,000 kWh annual volume
  • More than £50k annual spend

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Small business

If you're a micro or smaller business you should visit our SmartestEnergy Business website.

Am I a small business?

  • Less than 300,000 kWh annual volume
  • Less than £50k annual spend
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Existing small business customer?

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