cwied
Active Member
Frankly I think this is just someone at Tesla doing a bad job of describing the process. The agreement uses the term "ELRP A.4" to describe the program we're joining. This is a program that is available to more than just Tesla customers. I can't find any mention in the standard ELRP documentation that only the storage device participates in the VPP (nor would it make sense, since even those without any solar or batteries can participate in ELRP).It will not be meter data but PW data. You could technically have PV sending back power outside of PW. But none the less, it's about what the PWs are doing for VPP.
Here is the section on calculating the incentive from the ELRP documentation (https://elrp.olivineinc.com/wp-content/uploads/sites/5/2022/05/ELRP-Group-A-Terms-and-Conditions.pdf):
The reference to the interval meter implies to me that that is the data that will be used for calculation. In addition, this is the description on how exports work:Steps for calculating a participant’s ELRP baseline
1) Calculate the Energy Baseline (EB) – A service account must have at least 10 days of interval meter data available in PG&E’s billing system to have a valid baseline. Only the hourly average usage for the hours included in the event will be included in the EB determination.
2) The EB and Adjusted Energy Baseline (AEB) will all be calculated at the service account level. The EB and AEB will be calculated on an hourly basis using the average of the preceding similar days8 , excluding those days when the customer: (1) was subject to an ELRP event, or (2) an event for a dually enrolled DR program, if applicable, or (3) was subject to a grid outage. Critical Peak Pricing event days will not be excluded from the similar days in order to capture incrementality for ILR.
3) Calculate the Day-Of Adjustment Value (DOAV) – A DOAV shall not be less than 1.00 or greater than 1.40. The DOAV is a ratio of (a) the average load of the first three hours of the four hours prior to the event to (b) the average load of the same hours from the days selected in accordance with Step 2 above.
4) Calculate the Adjusted Energy Baseline (AEB) – A service account’s AEB for an ELRP event is calculated by multiplying the EB by the DOAV.
I am assuming that the site export limit setting that Tesla updated for the VPP corresponds to the export rating that includes both Powerwall and solar exports.If the customer has a Rule 21 interconnected device with export capability and permit, the customer may choose to count exported energy, up to their export rating, in ILR. In that case, the applicable ELRP baseline is modified to account for exported energy during nonevent days and count exported energy in ILR.