VULCAN
253.8 MW hybrid in Maricopa, AZ · In queue since April 2018 · Proposed COD December 2027
253.8 MW
Capacity
2
Components
Solar + Battery
8y 1m
In Queue
System Impact Study
IA Status
COD target: 2027
Total Duration
9y 8m
Interconnection request submitted to ISO/RTO
CAISO uses cluster studies where projects are batched annually and studied together.
Typical: 36–48 months (IR to IA)
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2027-12-31
The VULCAN project is a proposed 253.8 MW hybrid solar and battery energy storage project located in Maricopa County, Arizona. The development project consists of a 225 MW solar array coupled with a 28.8 MW battery. The project is in the California Independent System Operator (CAISO) interconnection queue as entry CAISO-1534, with an original queue entry date of April 16, 2018. The proposed commercial operation date is December 31, 2027.
The interconnection utility is San Diego Gas & Electric (SDGE), and the point of interconnection is the Hassayampa Common Bus 500 kV. The project's interconnection status is currently in the System Impact Study phase. The VULCAN project has been the subject of recent news coverage, with four articles related to regulatory matters, development, deals, and industry news.
Generated from interconnection queue and public data sources
State
AZ
County
Maricopa
Grid Region
CAISO (California)
Market
ISO/RTO Member
Developer
—
Utility
SDGE
Entity
CAISO
Service Type
—
Point of Interconnection
Hassayampa Common Bus 500 kV
Data Source
LBNL + Live
- ISO / RTO
- CAISO
- Trading Hub
- TH_SP15_GEN-APND
- Hub Confidence
- LOW
This project's market context is estimated from its Point of Interconnection. Hub and node assignments are approximate and based on geographic inference from the POI substation name.
Last updated 2026-03-26
View all articlesNo ask pi reports yet for this entity.
ask pi about VULCAN
