Methodology & Data Sources

Live API Data (Free, No Auth Required)

Periodic Data (Manual Updates)

Placeholder Data (Requires Integration/License)

Capture Rate Calculation

• Weighted Average Price = Σ(generation × price) / Σ(generation)
• Baseload Price = Simple average of all half-hourly day-ahead prices
• Calculation performed per settlement period (30-minute intervals)
• Aggregated to monthly/seasonal views

A capture rate below 100% indicates price cannibalization - renewable generators receive less than the average market price due to their output correlation with low-price periods.

Asset Classification (FoM/BtM)

• T_ prefix: Transmission-connected (Front of Meter)
• E_ prefix: Embedded/Distribution-connected (Behind the Meter)
• I_ prefix: Interconnectors
• Additional pattern matching for asset types (BESS, WIND, CCGT, etc.)

Classification is heuristic-based and may not be 100% accurate for all BMUs. Known major assets have explicit mappings.

Bill Forecast Methodology

• Typical household usage: 2,700 kWh electricity, 11,500 kWh gas (Ofgem standard)
• Price cap based on Ofgem quarterly announcements
• Forecasts derived from wholesale futures curves
• Regional variation based on DNO network charges

Bill breakdown percentages based on Ofgem published methodology: ~42% wholesale, ~23% network, ~10% policy costs, ~5% VAT, ~5% supplier margin.

BtM Installation Statistics

• Solar PV: MCS-certified domestic installations since 2010
• Battery Storage: MCS-certified installations (April 2024+)
• Heat Pumps: Air and ground source combined
• Capacity calculated from installation count × average system size

MCS data covers certified installations only. Actual market deployment may be 10-20% higher due to non-certified installations.