50+ Years of Collective BESS Experience

Preventative Maintenance and
Field Service for the Energy Transition

BESS operations and electrical services delivered by principals with careers spanning utility-scale energy projects across the western United States.

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C-10 CA Licensed Contractor

CR-11 AZ Licensed Contractor

230kV Max Voltage

Core Service

Battery Energy Storage Systems (BESS)
Operations & Maintenance

Comprehensive O&M services for utility-scale BESS — from 24/7 on-site operations to component-level repair. We keep your assets performing at peak efficiency and availability.

Operations Services

24/7 on-site operations and monitoring
Preventive maintenance programs
Emergency response services
Performance optimization and reporting
Long-term service agreements

Component Repair & Replacement

Battery module replacement and repair
BMS diagnostics using OEM software
Battery string control switchgear replacement
Fuse, contactor, and BCU repair services
BMS firmware upgrades and parameter adjustments
Cell-level troubleshooting with oscilloscope analysis

Testing & Commissioning

System installation and commissioning support
Integration testing and validation
Battery module charging and discharging
Root cause analysis and corrective action

Facility Support: Clean room environment for sensitive equipment repair, warehouse storage for components, and coordinated parts procurement.

Additional Service Lines

Full-spectrum support from engineering solutions through electrical construction and complete site management.

Operational Engineering Solutions

Engineered solutions for operational energy storage and electrical systems. We coordinate with licensed professional engineers to deliver compliant designs while providing hands-on implementation and project management.

Engineered solutions for operational systems
Turnkey project management with third-party engineering
System upgrades and modifications
Owner's representative services
Construction management and oversight
Regulatory compliance support and documentation

Electrical Infrastructure & Construction

Licensed C-10 electrical contractor providing installation, maintenance, and repair services from low voltage through high voltage systems — supporting BESS sites, substations, and renewable energy facilities.

Low voltage to high voltage electrical maintenance
Breaker and switchboard maintenance
Cable installation and repair
Balance of plant electrical systems
Grounding and safety measure installations
Light construction and installation services

Site Management & Infrastructure Services

Complete facility management for energy storage and renewable energy sites. We handle the operational details so you can focus on energy market performance.

HVAC and building ventilation systems
Fire suppression and smoke detection
SCADA maintenance and troubleshooting
NERC CIP cybersecurity management
Vendor coordination and management
Site inspections and SWPPP compliance

Why The REMS Group

Direct Access You work directly with leadership — no layers, no delays.

BESS-Focused We specialize in battery energy storage. It's not a line item — it's our entire practice.

Field-Proven 50+ years of combined experience on utility and BESS projects.

Headquartered in Vista, CA Headquartered in Vista, CA with project capability across the state of California.

Leadership That Delivers Results

Decades of utility-scale experience from the field to the executive suite.

Christina Gainor

Owner / CEO

Christina Gainor provides strategic leadership and operational direction for REMS Energy. She brings deep experience in business operations, procurement, and organizational management.

Expertise: Operations, procurement, business development
Founded: The REMS Group LLC, 2018

Dean Gainor

Owner / President

Dean Gainor brings over 50 years of electric industry experience spanning operations, project management, and executive leadership. As Vice President of PAR's West Transmission Region, he managed the execution of utility-scale transmission projects.

Executive PM: Sunrise Powerlink ($600M)
Executive PM: Devers Palo Verde #2 ($300M)
Executive PM: TRTP Segments ($400M)

Jeff Mucha

VP of Operations

Jeff Mucha oversees all operational aspects of REMS Energy engagements, ensuring exceptional customer service and project delivery excellence across renewable integration and BESS deployment projects.