Big Sky North Substation

Big Sky North Substation

Big Sky North

Project Type: PV rated at 105 MW

Location: Lancaster, CA in LA County

EPC: Rosendin Electric, Inc.

Products/Services: CAISO revenue meters, CAISO RIGs, Loss Compensator, Master Plant Controller (MPC), network aggregation and redundancy

Developed, owned, and operated by Sustainable Power Group (sPower), this substation is the first tie into the 230kV Big Sky Substation that feeds into the SCE grid. This substation accommodates a 105MW PV resource, with the intent to expand significantly with additional solar generation sites. Big Sky North Substation is directly managed by the Master Plant Controller to provide a central source of voltage and VAR regulation to support greater grid stability through the tie it has with the Big Sky Substation. Rosendin Electric, Inc. was the EPC responsible for managing construction. Trimark provided the complex metering utilizing a Loss Compensator cross communication approach to limit the losses calculated for revenue settlement. Trimark was also responsible for establishing the communication backbone between the Big Sky North and Big Sky Substation; as well as the integration of the Big Sky North Substation into the Master Plant Controller to allow the substation to achieve NERC CIP compliance and adhere to the IA requirements.

Trimark News

Five Questions with Jennifer Strand

Feb 19, 2026

Navigating CAISO’s New Resource Implementation (NRI) process takes more than completing a few forms. It requires a mix of competencies…

Learn More

Trimark On-Premise Controller Meets NERC-CIP Requirements

Aug 01, 2022

Trimark’s System Supports Centralized Control and Cyber Security Best Practices Trimark Associates, Inc., the industry leader in intelligent renewable energy…

Learn More

Trimark Awarded SCADA for World’s Largest PV+BESS Project

Feb 17, 2021

The Edwards & Sanborn project redefines the utility-scale PV+Storage landscape. Folsom, CA, February 17, 2021 – Trimark Associates, Inc. is…

Learn More

Trimark Promotes Haumschilt to VP of Finance and Accounting

Feb 12, 2024

Trimark Associates, Inc. (Trimark), the industry leader in intelligent energy control, advanced metering, and regulatory compliance, has announced that Rajinita…

Learn More

Five Questions with Jennifer Strand

Feb 19, 2026

Navigating CAISO’s New Resource Implementation (NRI) process takes more than completing a few forms. It requires a mix of competencies…

Learn More

Trimark Names Mark Kellaher as Chief Operating Officer

Aug 28, 2026

Trimark Associates has named Mark Kellaher Chief Operating Officer. “Mark’s executive leadership, large-scale project delivery experience, operational discipline and strategic…

Learn More

Projects

Example Projects

Take a minute to see how Trimark has helped resource owners, EPCs, and ISOs change the electric grid.
View All Projects

Ridgetop II

Dec 01, 2018

Project Type: Wind 27.392 MW Location: Mojave, CA Client: Terra-Gen Products/Services: CAISO revenue meters and ARIG configuration Ridgetop II is…

Learn More

West Line

Jun 26, 2023

Project Type: 100 MW PV (Part of Grand Central cluster) Location: Eloy, AZ Client/EPC: AES Products/Services: Trimark SCADA Systems Integration…

Learn More

Alta Wind 4, 5, 8, and 9

Jan 06, 2019

> Project Type: CAISO meter replacements Alta Wind 4 & 5 – Owned by Clearway Energy Alta Wind 8 –…

Learn More

Clearway Energy Multi-Site Maintenance Service Agreements

Jan 29, 2020

Project Type: PV generating facilities and wind generating facilities – 21 sites Location: CA; one site in AZ Client/EPC: NRG…

Learn More