Solar Billing Plan Export Pricing
Methodology for calculating the Energy Export Credit Rates from the Most Recently Approved Avoided Cost Calculator:
The Energy Export Credits for a given installation vintage of customers in a given calendar year are based on the applicable vintage of Avoided Cost Calculator (ACC) forecast of values for that year. Because the ACC outputs different values by climate zone and for every hour of the year, the following process is used to aggregate values into a single set of values for each month, day-type, and hour for all SDG&E customers.
- For each Climate Zone, create a set of 8760 hourly avoided costs using the ACC value for the Delivery component, applicable to both bundled and unbundled customers, and the Generation component, applicable only to bundled customers.
- Take the straight-average ACC value across the Climate Zones for each hour.
- Because the Avoided Cost Calculator output is in Pacific Standard Time, adjust time and hour labels to account for daylight savings time, and identify weekdays and weekend/holidays.
- For each monthly Delivery and Generation components, calculate the average of all prices by hour, per weekday and weekend. This calculation will render the Energy Export Credit components (Delivery and Generation) for each month’s weekday and weekend values.
- For each hour and weekday/weekend, the full Energy Export Credit will then be the sum of the corresponding Generation and Delivery components for that hour/weekday/weekend.
Note: Because the Net Billing Tariff (NBT) Energy Export Credits are adjusted for daylight savings time, the date and time labeling has also been adjusted to reflect daylight savings time.
Holidays include New Year’s Day, President’s Day, Memorial Day, Independence Day, Labor Day, Veterans Day, Thanksgiving Day and Christmas Day.
Understanding Export Pricing:
This data file contains 20-years of hourly export rates for three sets of SDG&E Solar Billing Plan (i.e. Net Billing Tariff / NBT); NBT23, NBT24, and NBT00.
- NBT23 = Solar Bill Plan Customers with applications filed in 2023 that qualify for 9-year lock-in export rates
- NBT24 = Solar Billing Plan Customers with applications filed in 2024 that qualify for 9-year lock-in export rates.
- NBT00 = Solar Billing Plan Customers that opt-in to current year export rates.
The export rates are presented in UTC time, covering from 1/1/2024 12:00:00am PST, to 12/31/2043 11:59:59pm PST.
Per CPUC Decision, SDG&E is required to provide 20-years of export rates. However please note that NBT23 and NBT24 customers are only guaranteed export rates for 9-years from Permission-To-Operate (PTO) rate of the system. Any rates factors in this file beyond the 9-year lock-in period are for illustrative purposes only and are not actual effective SBP Export Rates at those times. For NBT00 customers, only those rates for Pacific Standard Time calendar year 2024 are actual effective rates, and all rates after that are for illustrative purposes only.
The following is a description of the data fields in the data file.
RateLookupID (RIN) Column:
If the RateLookupID (RIN) includes “USCA-SDXX” that indicates Delivery Export Pricing.
If the RateLookupID (RIN) includes “USCA-XXSD” that indicates Generation Export Pricing*.
*If your electricity is purchased or generated by Clean Energy Alliance or San Diego Community Power, please refer to your CCA for more information about generation export pricing.
RateName Column:
The number that follows “NBT” represents the legacy pricing for that year. Please see first paragraph for a description.
Dates and Times Columns:
DateStart, TimeStart, DateEnd and TimeEnd values are in Coordinated Universal Time (UTC).
DayStart, DayEnd and ValueName are in Pacific Prevailing Time:
- These fields indicate the effective day-type categories of the rate factor
- Monday through Friday is 1-5. Saturday & Sunday is 6-7. Holidays are listed as number “8” in the DayStart and DayEnd columns.
- ValueName Column indicates the month and weekday hour or weekend hour starting value for the rate factor.
Value and Unit Columns:
This represents the dollar amount pricing per export kWh.