EHV Site Tariffs
Look up site-specific tariff rates for EHV (22kV and above) connections. EDCM tariffs are unique to each site based on their network impact and connection characteristics.
Finding EHV rates means digging through DNO annexes
EDCM sites have unique tariffs based on their network location and connection characteristics. DNOs publish these in sprawling Annex 2/6 documents - one per region, updated annually. When a client asks about their EHV charges, you need to know exactly where to look.
Use Cases
When to use this tool
Site-Specific Rate Lookup
Find a client's EDCM tariff rates by entering their MPAN or searching by site name.
EHV Bill Validation
Verify that a client's supplier is using the correct site-specific rates on their invoices.
New EHV Connection Planning
Help clients understand ongoing network charges before committing to an EHV connection.
Multi-Site Rate Comparison
Compare EDCM rates across multiple client sites or within a portfolio.
Annual Budget Preparation
Provide clients with accurate rate data for budgeting EHV network charges.
How It Works
Enter your MPAN
Or search by site name
Select charging year
Current or future rates
View tariffs
Site-specific EDCM rates
Export rates
Download for your records
What You'll Get
Site-Specific Tariff Rates
Import and export charges unique to each connection, extracted from DNO Annex documents.
Fixed & Capacity Charges
See all charge components including fixed daily rates and capacity-based charges.
Reactive Power Rates
Understand reactive power charge exposure when power factor drops below threshold.
Multi-Year Rate History
Track how a site's rates have changed across charging years.
Built on official data
We calculate using the same published rates DNOs use
Quick Answers
“What is EDCM?”
The Extra High Voltage Distribution Charging Methodology (EDCM) applies to connections at 22kV and above. Unlike CDCM (standard) tariffs, EDCM rates are calculated individually for each site based on their specific network impact.