Monterey County unveils solar-plus-storage at jail and sheriffoffice; county projects about $13 million in savings

Monterey County officials said April 15 that a solar-plus-storage project at the Monterey County Jail and adjacent sheriff's facilities is complete and operational, financed by a third party under a power purchase agreement that requires no county capital up front.

The county and Mint Systems, the local company that led the assessment and development, described the project as a way to cut the jail's energy bills and add resilience. "We've got these beautiful projects that are gonna save, I believe, it's close to $13,000,000 over the next 25 years for the county," said Rob Hines of Mint Systems, summarizing the partnership's financial projection.

County sustainability staff and the sheriff's office said the installation pairs on-site solar generation with battery storage to reduce both energy use and demand charges. Commander Andy Rosas of the Monterey County Sheriff's Office said the project "is allowing us to significantly reduce our energy use and our carbon footprint, while strengthening operational resilience at a critical public safety facility," and emphasized that the county worked with health and emergency preparedness teams to prioritize safety. Rosas noted the system uses lithium iron phosphate battery technology, which county officials said they assessed for fire and hazardous-materials safety.

The project was developed under a model in which Mint Systems and a third-party investor own and maintain the equipment for a 25-year term and sell electricity back to the county at a discounted rate. According to presenters, the county did not pay capital costs upfront; instead, the arrangement lets the county avoid an initial outlay while receiving long-term energy cost savings and operational benefits.

Cora Pantaraj, Monterey County's sustainability manager, said this site is one of six major renewable projects the county has deployed in recent years and described a mixed approach to financing that combines PPAs and direct purchases at other facilities such as Natividad Medical Center and the government center.

Officials acknowledged the project faced permitting and safety questions during the development period, including challenges posed by regional wildfire concerns. Rob Hines said the county and partners worked through safety, environmental and permitting issues over several years to complete the installations.

Officials said the savings identified under the PPA are projected to free funds for other county needs but did not provide an independent verification of the $13 million figure during the briefing.

The county and Mint Systems said they will operate and maintain the systems under the 25-year arrangement; county staff indicated the installations are now live and available for use. No formal board action was announced at the briefing; presenters described the project as a completed collaboration between county staff, Mint Systems and SunRock Distributed Generation.