Solar Tracker System Inspection Checklist [FREE PDF]

Solar tracker systems require systematic inspection to ensure optimal energy yield, mechanical integrity, and compliance with NEC Article 690 and IEC 62446 photovoltaic system inspection standards. Regular inspection of drive motors, slew drives, control systems, and structural components helps prevent unplanned downtime and safety incidents. This checklist guides Solar Technicians through a comprehensive per-event inspection aligned with OSHA 1926.960 and NFPA 70E electrical safety requirements

  • Industry: Solar Energy
  • Frequency: Monthly
  • Estimated Time: 45-60 minutes
  • Role: Solar Technician
  • Total Items: 37
  • Compliance: NEC Article 690 Solar Photovoltaic Systems, IEC 62446-1 Grid Connected PV Systems – Minimum Test and Inspection Requirements, OSHA 29 CFR 1926.960 Working on or Near Exposed Energized Parts, NFPA 70E-2021 Standard for Electrical Safety in the Workplace, ANSI/NETA MTS-2021 Maintenance Testing Specifications

Pre-Inspection Safety & Lockout/Tagout

Verify all safety controls and energy isolation procedures are in place before beginning physical inspection.

  • Has a lockout/tagout (LOTO) procedure been applied to the tracker control circuit prior to inspection?
  • Is the inspector wearing required PPE including arc-flash rated clothing and insulated gloves?
  • Has a pre-task risk assessment been completed and reviewed with all personnel on site?
  • Is the tracker placed in the stow (horizontal) position and confirmed stationary before inspection?
  • Is the site emergency contact information and nearest medical facility confirmed and posted?

Structural & Mechanical Integrity

Inspect all structural members, fasteners, bearings, and mechanical drive components for damage, corrosion, and secure attachment.

  • Are all main structural torque tubes and support piles free from visible bending, cracks, or corrosion?
  • Are all fasteners (bolts, nuts, and clips) torqued to specification with no missing or visibly corroded hardware?
  • Are slew drive or linear actuator pivot bearings free from excessive play, grinding, or seizure?
  • Is the tracker rotation range unobstructed with no physical interference from adjacent rows, vegetation, or debris?
  • Are module clamps and inter-module connectors on the tracker torque tube secure and undamaged?
  • Please attach or upload a photo of the slew drive / actuator assembly condition.

Drive Motor & Actuator System

Evaluate the tracker drive motor, gearbox, and actuator for operational performance and electrical condition.

  • Does the drive motor operate without unusual noise, vibration, or overheating during a manual jog test?
  • Is the motor enclosure rating (IP/NEMA rating) maintained with seals intact and no evidence of moisture ingress?
  • Are motor power cables and connectors free from abrasion, UV degradation, or pinch points at moving parts?
  • Is the gearbox lubrication level adequate with no visible oil leaks at seals or housings?
  • What is the measured motor insulation resistance (MΩ) at 500V DC?

Control System & Sensors

Inspect tracker controller, communication links, limit switches, and solar position sensors for correct operation.

  • Is the tracker controller displaying active tracking mode with no fault or error codes on the HMI?
  • Are east and west limit switches functioning correctly to stop tracker motion at defined end-of-travel positions?
  • Is the inclinometer or angle sensor reading within ±0.5° of the expected tracker tilt angle?
  • Are all communication cables (RS-485, Ethernet, or other) intact with no exposed conductors or connector damage?
  • Is the wind speed anemometer (if equipped) operational and triggering stow mode at the programmed wind speed threshold?
  • Record any fault codes or controller alarm messages observed during inspection.

DC Wiring & Electrical Connections

Inspect all DC cabling, module connectors, junction boxes, and wiring harnesses on the tracker system.

  • Are all MC4 or compatible module connectors fully mated, latched, and free from corrosion or burn marks?
  • Is all DC wiring secured in conduit or UV-rated cable management systems along the tracker torque tube?
  • Are string combiner box terminals tight, labeled correctly, and free of moisture or insect intrusion?
  • Are DC string fuses or overcurrent protection devices present, correctly rated, and undamaged?
  • Is there any evidence of wiring chafing, pinching, or abrasion at pivot points or cable flexion zones?

Grounding & Bonding Verification

Verify all equipment grounding conductors, module frame bonds, and grounding electrode connections on the tracker.

  • Are all module frames bonded to the tracker torque tube with listed bonding hardware or integrated bonding clips?
  • Is the Equipment Grounding Conductor (EGC) continuous from module frames to the system grounding point with no breaks or corrosion?
  • Are all pile foundations and structural steel members bonded to the grounding electrode system?
  • What is the measured ground continuity resistance between module frame and system ground point?
  • Are grounding conductors sized correctly and protected from mechanical damage where exposed?

Performance Verification & Documentation

Record operational performance data, document deficiencies, and assign corrective action follow-up.

  • Does the tracker demonstrate smooth, consistent east-to-west tracking movement during a full-travel operational test?
  • Is the measured DC string open-circuit voltage (Voc) within ±5% of the expected value for current irradiance conditions?
  • Have all identified defects been logged in the CMMS or maintenance management system with priority classification?
  • Describe any deficiencies found during this inspection and recommended corrective actions.
  • Has the tracker been returned to automatic tracking mode and confirmed operational at end of inspection?

Related Renewable Energy Checklists

Related Solar Checklists

Why Use This Solar Tracker System Inspection Checklist [FREE PDF]?

This solar tracker system inspection checklist [free pdf] helps solar energy teams maintain compliance and operational excellence. Designed for solar technician professionals, this checklist covers 37 critical inspection points across 7 sections. Recommended frequency: monthly.

Ensures compliance with NEC Article 690 Solar Photovoltaic Systems, IEC 62446-1 Grid Connected PV Systems – Minimum Test and Inspection Requirements, OSHA 29 CFR 1926.960 Working on or Near Exposed Energized Parts, NFPA 70E-2021 Standard for Electrical Safety in the Workplace, ANSI/NETA MTS-2021 Maintenance Testing Specifications. Regulatory-aligned for audit readiness and inspection documentation.

Frequently Asked Questions

What does the Solar Tracker System Inspection Checklist [FREE PDF] cover?

This checklist covers 37 inspection items across 7 sections: Pre-Inspection Safety & Lockout/Tagout, Structural & Mechanical Integrity, Drive Motor & Actuator System, Control System & Sensors, DC Wiring & Electrical Connections, Grounding & Bonding Verification, Performance Verification & Documentation. It is designed for solar energy operations and compliance.

How often should this checklist be completed?

This checklist should be completed monthly. Each completion takes approximately 45-60 minutes.

Who should use this Solar Tracker System Inspection Checklist [FREE PDF]?

This checklist is designed for Solar Technician professionals in the solar energy industry. It can be used for self-assessments, team audits, and regulatory compliance documentation.

Can I download this checklist as a PDF?

Yes, this checklist is available as a free PDF download. You can also use it digitally in the POPProbe mobile app for real-time data capture, photo documentation, and automatic reporting.

Browse More Checklists