GB Electricity Network Charge Data & MHHS Reference Data Infrastructure - SSC, DUoS Tariff ID Mappings, API Access & Data Licensing - EnergyCode

D0018 half-hourly profile data from Elexon. Maps flat meter reads to time-of-use consumption across all 14 GSP regions and 4 profile classes.

Complete DUoS rate tables for all 14 DNOs. Red, Amber, Green unit rates plus fixed, capacity, exceeded capacity, and reactive power charges.

Maps every Line Loss Factor Class code to one of 32 standardised CDCM tariff categories. Covers 14 DNOs + 22 IDNOs from Elexon ISD.

Red/Amber/Green time band boundaries per DNO per charging year. Defines which half-hours attract peak, shoulder, or off-peak rates.

Transmission locational tariffs for all 14 demand zones plus TDR band thresholds across RIIO-2 and RIIO-3. Generation TNUoS across 27 zones coming soon.

Balancing Services rates published in 6-monthly periods (H1 and H2). Applied to total consumption following the CMP361 reform.

Monthly supplier obligation rates per delivery year. Peak demand multiplied by blended T-4 and T-1 auction rates plus settlement costs.

Contracts for Difference interim levy rates published quarterly by LCCC, plus operational cost levies applied per MWh of consumption.

Climate Change Levy rates published by HMRC per charging year. Includes domestic exemption logic and 92% Climate Change Agreement discount rules.

Nuclear Regulated Asset Base interim levy rates published monthly by LCCC, effective December 2025. The charge that funds Sizewell C construction. 100% EII exemption available.

Assistance for Areas with High Electricity Distribution Costs rates published annually by NESO. A levy on all GB electricity consumption to subsidise distribution in the north of Scotland (SHEPD).

Extra High Voltage (22kV+) tariffs published in DNO Annexe 2 documents. Each EHV site receives individually calculated rates based on network location and dedicated assets. Import and export charges across all 14 DNOs.

Distribution network loss factors from Elexon ISD. Seasonal time period values for every LLFC code across all 14 DNOs.

Standard Settlement Configurations (SSCs), Time Pattern Regimes (TPRs), and Meter Timeswitch Codes (MTCs) from Market Domain Data. Complete SSC-to-TPR mappings for MHHS settlement.

Gas distribution charges from Cadent, NGN, SGN, and WWU. Includes ZCA (capacity), ZCO (commodity), CCA/CFI (customer charges), ECN, and SOLR levies across all 13 LDZs.

Annual Quantity band thresholds (73,200 kWh and 732,000 kWh) that determine which gas charge rates apply. Power function rate calculations for large sites.

The Xoserve-published Peak Load Factors that the GDNs themselves use to derive Supply Offtake Quantity from Annual Quantity. Keyed by LDZ, EUC band and charging year, sourced from the UNC TPD NDM Algorithm.

Exit Capacity (ECN) charge zones across the National Transmission System. Each MPRN sits in a specific exit zone with its own per-kWh capacity rate — required for accurate ECN calculation.

EUC bands, NDM size classes (Small / Medium / Large / Very Large), customer types (I&C, Domestic), read frequencies, and Direct Connect / IGT / CSEP site-type detection. Drives which charges apply and which rate structure (flat or power-function) is used.

Converts total kWh into Red/Amber/Green breakdowns using profile coefficients, DNO time bands, and region-specific calendars. Handles Economy 7 day/night splits.

Splits billing periods at charging year boundaries (April and October). Applies different rates per segment with profile-class-aware proration.

Validates and parses legacy and MHHS-format MPANs (21/22 digit, prime-weight check digit, DNO and LLFC extraction) and gas MPRNs (6–11 digit, IGT prefix detection 74–78, postcode-to-LDZ resolution).

England & Wales plus Scotland bank holidays — different dates, different regions. Bank holidays use off-peak Green rates instead of weekday bands.

BST/GMT clock changes produce 46 or 50 settlement periods instead of 48. Period-to-time mappings shift on transition days.

Geographic mapping from Grid Supply Points to DNO regions. Connects the right profile coefficients to the right tariff rates.

Power factor qualification, exceeded capacity detection, and MIC threshold analysis. Automated penalty calculations with tan coefficient formula.

EDCM peak period handling for EHV customers. Super Red applies only during November to February, weekdays 4pm-7pm. Completely different from CDCM's year-round Red/Amber/Green time bands.