Rows of utility-scale battery energy storage containers under a mountain sky

Commissioning Services

Battery Energy Storage Systems (BESS)

Utility-scale Commissioning | Controls Integration Performance Validation

25+ GWh

of BESS Commissioning Experience

60+

BESS Engineers & Technicians

50+

BESS Projects

BESS Partners

  • BYD
  • CATL
  • Samsung
  • Gotion
  • LG Energy Solution
  • Sungrow

Commissioning Lifecycle Coverage

  • Pre-Commissioning

    Thorough inspection and verification of system installation, including equipment placement, cable terminations, and subsystem readiness. We ensure all components are installed according to design specifications.

  • Cold Commissioning

    Non-energized functional testing of control systems, protection schemes, SCADA/EMS integration, and communication networks. Verifies system logic and fail-safe pathways before power-up.

  • Installation Readiness

    Verify installation quality, cable terminations, equipment placement and subsystem readiness.

  • Hot Commissioning

    Energized testing under real-world conditions. We validate inverter and battery operation, grid synchronization, thermal management, and system-level performance under dynamic loads.

  • PCS Commissioning Support

    Full support for the Power Conversion System (PCS)—including inverter functionality, grid compliance testing, fault ride-through behavior, and coordination with battery management systems.

  • Turnover

    Close issues, retest corrections, organize records and provide customer-ready documentation.

Aerial view of a battery energy storage installation

Schedule-Driven Field Execution

Our team is composed of battery storage experts with native OEM relationships and 25+ GWh experience in commissioned capacity. We provide structured commissioning plans, efficiency tracking, troubleshooting and field coordination to support on-time energization and turnover.

Discover our BESS Commissioning

NEEC validates the full operating chain — battery, PCS, auxiliary systems, controls, communications and turnover documentation.

BESS Controls, PCS & Performance Support

Technician in a hard hat working at an electrical control panel

  • PCS Commissioning Support

    Inverter functionality, grid-compliance support, fault response behavior and coordination with battery management systems.

  • BMS/EMS Integration

    Controls integration with BMS, EMS, SCADA and site-level logic for safe operation and dispatch readiness.

  • Auxiliary Systems

    HVAC, fire suppression, communications, control power and balance-of-plant readiness verification.

  • Load Bank & Capacity Support

    Controlled testing to validate performance, thermal response and operational stability before full grid operation.

Safety First

Utility work demands more than technical competence. It requires disciplined preparation, clear communication, procedural compliance, and respect for hazards present in energized and high-energy environments. NEEC has a comprehensive safety program that includes our employees’ scope of work, industry best practices, OSHA and NFPA regulatory standards.
Experience Modification Rate (EMR): 0.65 (2026), with a three-year improving trend.