Annex 6

Annex 6 contains quarterly updates to EDCM (EHV) tariffs published between annual charging statement releases. While Annex 2 is published once a year (effective 1 April), Annex 6 addenda are published throughout the year to reflect changes.

Why Annex 6 exists: The electricity network constantly evolves - new EHV sites connect, existing sites modify their capacity, and tariff corrections may be needed. Rather than wait for the next annual charging statement, DNOs publish Annex 6 addenda to keep tariffs current.

What Annex 6 contains:

• New site tariffs - Sites that connected after the annual Annex 2 was published
• Amended tariffs - Corrections to existing site tariffs
• Capacity changes - Updated tariffs when sites change their agreed capacity
• All the same charge components as Annex 2 (Super Red rates, fixed adders, capacity charges, etc.)

Precedence rules: When a site appears in both Annex 2 and Annex 6, the Annex 6 rates take precedence. This is critical for bill validation - using the older Annex 2 rates when an Annex 6 update exists would result in incorrect calculations.

Publication cycle: DNOs publish Annex 6 addenda quarterly, though the exact timing varies by DNO. EnergyCode monitors all 14 DNOs weekly for new Annex 6 publications.

Why Annex 6 matters: For accurate EHV bill validation, you must check both Annex 2 and any subsequent Annex 6 addenda. Missing an Annex 6 update could mean validating against outdated rates.