The ISO Generator Interconnection Procedures (ISO Tariff Appendix Y Section 6) requires participating transmission owners to annually update and publish per unit costs for use during the current interconnection study cycle for estimating the cost of facilities required to interconnect generation. Per unit costs are used to develop the cost for reliability and delivery network upgrades and participating transmission owner’s interconnection facilities. The ISO annually publishes draft per unit costs to its website, holds a stakeholder meeting and allows stakeholders to comment on the draft costs. The ISO publishes the final costs in the March to April time frame. The schedule for this annual process is located in Appendix 5 of the interconnection procedures.
| Development | Decision | Implementation | Completed/Closed |
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Apr 1, 2021 Final per unit cost guides posted
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Completed |
Final cost guides |
SCE 2021 Final Per Unit Cost Guide 04/01/2021
VEA 2021 Final Per Unit Cost Guide 04/01/2021
DCRT 2021 Final Per Unit Cost Guide 04/01/2021
PG&E 2021 Final Per Unit Cost Guide 04/01/2021
DSL 2021 Final Per Unit Cost Guide 04/01/2021
GLW 2021 Final Per Unit Cost Guide 04/01/2021
SDGE 2021 Final Per Unit Cost Guide 04/01/2021
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Web meeting |
Video - 2021 Participating Transmission Owner Per Unit Cost Guides - Mar 1, 2021 03/26/2021
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Draft cost guides |
DCRT 2021 Draft Per Unit Cost Guide 02/22/2021
DSL 2021 Draft Per Unit Cost Guide 02/22/2021
GLW 2021 Draft Per Unit Cost Guide 02/22/2021
PG&E 2021 Draft Per Unit Cost Guide 02/22/2021
SCE 2021 Draft Per Unit Cost Guide 02/22/2021
SDGE 2021 Draft Per Unit Cost Guide 02/22/2021
VEA 2021 Draft Per Unit Cost Guide 02/22/2021
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