supported the movement of May to the winter season based on 2015 and 2016 Default Load Aggregation Point (DLAP) wholesale prices and load data, and Exhibits JT-2 and JT-4 (discussed in Section 8. Rate Design, below) utilize the five-month summer season in their joint testimony. (Chart 4 from Exhibit SDG&E-11 at 27) SEIA opposes the switch from a six-month summer to a four-month summer as proposed by ORA. “SEIA reviewed 30 years (1985 - 2015) of data on daily high temperatures for 26 weather stations in the San Diego area, determining the percentage of daily high measurements that fell into the Extremely Hot (greater than or equal to 95 F) category.” (Exhibit SEIA-01 at 22.) Taken together, the SDG&E DLAP prices for 2015 and 2016 and the SEIA figure shows that historically May is much like non-summer months in terms of the frequency of very hot days, a typical driver of peak electric demands. While we agree that SEIA made a strong case that the trend for May is increasing frequency of very hot days, we agree with SDG&E and ORA that based on current load data, May more closely aligns to April, not June or July. For that reason, we adopt a five-month summer (June-October) and seven-month winter (November-May) season and direct SDG&E to implement this revised seasonal definition as soon as practicable following the issuance of a final CPUC decision. Base Time-of-Use Periods “Historically, TOU rate intervals were designed to reflect time variations in the cost to serve loads, with higher-priced periods during summer week-day
supported the movement of May to the winter season based on 2015 and 2016 Default Load Aggregation Point (DLAP) wholesale prices and load data, and Exhibits JT-2 and JT-4 (discussed in Section 8. Rate Design, below) utilize the five-month summer season in their joint testimony. (Chart 4 from Exhibit SDG&E-11 at 27) SEIA opposes the switch from a six-month summer to a four-month summer as proposed by ORA. “SEIA reviewed 30 years (1985 - 2015) of data on daily high temperatures for 26 weather stations in the San Diego area, determining the percentage of daily high measurements that fell into the Extremely Hot (greater than or equal to 95 F) category.” (Exhibit SEIA-01 at 22.) Taken together, the SDG&E DLAP prices for 2015 and 2016 and the SEIA figure shows that historically May is much like non-summer months in terms of the frequency of very hot days, a typical driver of peak electric demands. While we agree that SEIA made a strong case that the trend for May is increasing frequency of very hot days, we agree with SDG&E and ORA that based on current load data, May more closely aligns to April, not June or July. For that reason, we adopt a five-month summer (June-October) and seven-month winter (November-May) season and direct SDG&E to implement this revised seasonal definition as soon as practicable following the issuance of a final CPUC decision. Base Time-of-Use Periods “Historically, TOU rate intervals were designed to reflect time variations in the cost to serve loads, with higher-priced periods during summer week-day
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