About Option S


“Option S” is a rate option that is available to customers who install storage and take service on one of PG&E’s non-residential “B” rates ꟷ rates B19 Voluntary, B19 Mandatory, and B20. To be eligible for Option S, the rated capacity of the installed storage system must be equivalent to at least 10% of the customer’s peak demand over the previous 12 months. To enroll in Option S, your storage system must have received Permission to Operate (PTO) from PG&E.



Option S Benefits


Option S may provide a more advantageous rate structure for customers with storage. Without Option S, customers on the “B” rates are charged demand charges ($/kW) only on a monthly basis. With Option S, a portion of the demand charge revenue is collected through daily demand charges, and monthly demand charges are lower than those assessed customers who are on the regular “B” rates. This reduces customers’ exposure to higher demand charges associated with infrequent periods of elevated load. When demand charges are assessed monthly, a period of elevated load within the month sets the applicable demand charges for that month. When demand charges are assessed daily, a period of elevated load will result in higher demand charges for that day, but a customer is able to manage demand charges on other days in that month. This can result in a customer on Option S paying a monthly sum of demand charges that is less than what their monthly demand charges would have been on a regular business rate.



Option S Cap


Enrollment on the Option S rate is capped at 150 Megawatts (MW) in PG&E’s service area1, with separate 50 MW caps for each of the three rate categories: B19 Voluntary; B19 Mandatory; and B20. To help stakeholders view how enrollment by PG&E customers in Option S is tracking toward the cap, the tables below show information on current and potential Option S enrollment. The tables will be updated monthly until enrollment reaches 35 MW, after which they will be updated weekly.



Cap Tracker


Table 1 shows the enrollment cap. Table 2 displays the number of applicants and megawatts enrolled as of the date shown as of the date this web page was last updated shown below. Table 3 shows the remaining cap. Tables 4 and 5 show customers who may be eligible to enroll in Option S but have not done so as of the date this web page was last updated.


Progress toward the Option S Cap in PG&E’s Service Area:


Last updated: 10/05/20

Table 1. MW Cap on Option S enrollment by rate schedule

RateMW

B19V

50

B19

50

B20

50

Table 2. Currently enrolled on Option S and operating (Received PTO)

RateNumber of CustomersMW

B19V

0

0

B19

3

1.15

B20

3

1.4

Table 3. Remaining MW in Cap (Table 1 minus Tables 2 and 3)

RateMW

B19V

50

B19

48.85

B20

48.6

Additional Storage Customers who may be eligible for Option S



TABLE 4. EXISTING STORAGE INTERCONNECTIONS BY CATEGORY OF RATE ELIGIBILITY2 FOR CUSTOMERS THAT WOULD BE ELIGIBLE FOR ꟷ AND MAY ELECT TO TAKE SERVICE ON ꟷ OPTION S

RateNumber of CustomersMW

B19V

42

5.4

B19

194

31.9

B20

45

31.2

TABLE 5. STORAGE INTERCONNECTION APPLICATIONS BY CATEGORY OF RATE ELIGIBILITY2 FOR CUSTOMERS THAT WOULD BE ELIGIBLE FOR ꟷ AND MAY ELECT TO TAKE SERVICE ON ꟷ OPTION S

RateNumber of CustomersMW

B19V

24

7.6

B19

54

20.2

B20

31

32.2

Notes:


1Once the Option S Cap is reached, the Option S program will be closed and all pending projects that have not yet met the requirements for Option S will not be eligible for Option S. Instead, these pending projects will be required to interconnect under another applicable Rule 21 agreement.


2These include customers that are on legacy commercial and industrial rates but are eligible for the applicable “B” rate. In other words, customers with storage on A10, E19V, E19, and E20. The customer will not be able to enroll on Option S until the storage system has achieved Permission to Operate (PTO).