This section documents essential site and asset metadata to ensure accurate tracking, warranty validation, and historical maintenance record continuity. Provide precise identification and environmental data at the time of arrival.
Site Identification Code
Inverter Unit Asset ID
Faulted Inverter Serial Number
Inverter Manufacturer
Inverter Model Number
Rated AC Power Capacity (kW)
Rated DC Input Voltage (V)
Original Inverter Commissioning Date
Lead Technician Full Name
Technician Certification ID
Technician Certification Level
Level 1: Basic Maintenance
Level 2: Component Replacement
Level 3: High-Voltage Authorized
Level 4: Master Technician & Supervisor
Technician Arrival Timestamp
Diagnostic Assessment Start Timestamp
Current Weather Condition
Clear Sky
Partly Cloudy
Overcast
Light Rain
Heavy Rain
Snow
Dust/Sand Storm
High Winds
Ambient Temperature (°C)
Wind Speed (m/s)
Global Horizontal Irradiance - GHI (W/m²)
Site Access Route Condition and Notes
Pre-Work Safety Briefing Completed with Site Safety Officer
Explain why safety briefing was not completed and describe compensatory measures taken
I confirm I have reviewed and understood the site-specific Hazard Energy Control Plan
Upload Site Overview Photo Showing Inverter Location Context
Upload Faulted Inverter Nameplate Photo
Reference Previous Maintenance Records (if applicable)
Document comprehensive diagnostic findings to establish root cause, quantify production loss, and justify replacement authorization. Include quantitative measurements and qualitative observations.
Fault Detection Method(s) Used
SCADA System Alert
On-Site Visual Inspection
Performance Data Analytics
Grid Operator Notification
Thermal Imaging Survey
Acoustic Anomaly Detection
Scheduled Preventive Maintenance
Remote Monitoring Platform
Detailed Fault Description and Observed Symptoms
SCADA/HMI Fault Codes or Alert Messages
Visual Inspection Findings - Internal and External
Upload Thermal Imaging Scan Results
Upload Photos of Visible Physical Damage or Anomalies
DC Input Side String Health Analysis
String ID | Measured Voltage (V) | Expected Voltage (V) | Measured Current (A) | String Health Status | ||
|---|---|---|---|---|---|---|
A | B | C | D | E | ||
1 | String 01 | 820 | 840 | 125 | Normal | |
2 | String 02 | 815 | 840 | 120 | Normal | |
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AC Output Side Electrical Parameter Analysis
Phase/Parameter | Measured Voltage (V) | Measured Current (A) | Power Factor (%) | Total Harmonic Distortion - THD (%) | Status | ||
|---|---|---|---|---|---|---|---|
A | B | C | D | E | F | ||
1 | Phase L1 | 277 | 0 | 0 | 0 | Abnormal | |
2 | Phase L2 | 278 | 0 | 0 | 0 | Abnormal | |
3 | Phase L3 | 276 | 0 | 0 | 0 | Abnormal | |
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Pre-Fault Average Daily Production (kWh)
Current Average Daily Production (kWh) Since Fault
Calculated Production Delta (%)
Estimated Daily Revenue Loss (USD)
Fault Duration (Days)
Cumulative Estimated Revenue Loss (USD)
Fault Severity Rating (1=Minor, 5=Critical Production Impact)
Does this fault pose an immediate safety hazard to personnel or equipment?
Describe the specific safety hazard and immediate mitigation actions taken
Does this fault pose a risk to grid stability or power quality?
Detail the grid stability risk and whether grid operator was notified
Grid Impact Assessment - Describe any effects on neighboring inverters or substation equipment
Diagnostic Confidence Level in Root Cause Determination
High - Clear evidence and repeatable symptoms
Medium - Likely cause but some uncertainty remains
Low - Multiple possible causes, further analysis needed
Root Cause Hypothesis and Supporting Evidence
CRITICAL SAFETY SECTION: Document every step of high-voltage isolation and Lock-out/Tag-out (LOTO) procedures. Incomplete or inaccurate documentation will result in immediate work stoppage. All verifications must be witnessed where required.
Has Lock-out/Tag-out (LOTO) procedure been formally authorized by Plant Control Room/Supervisor?
Explain why LOTO authorization was not obtained and describe alternative hazardous energy control measures implemented. This requires Level 4 Supervisor approval.
AC Disconnect Switch: Physically opened, locked, and tagged with personal safety lock
DC Disconnect Switch: Physically opened, locked, and tagged with personal safety lock
Grounding Switches: Closed, locked, and verified to provide equipotential bonding
Capacitor Banks: Discharged and verified with proper bleeding time observed
LOTO Points Verification and Voltage Testing Log
Energy Isolation Point Description | Lock ID Number | Lock Applied By (Name/ID) | Verification Status | Measured Voltage After Lockout (V) | Voltage Test Instrument Used | ||
|---|---|---|---|---|---|---|---|
A | B | C | D | E | F | ||
1 | AC Switchgear Bus | LOCK-2025-001 | Tech Smith/ID-5847 | Yes | 0 | Fluke 289 | |
2 | DC Combiner Box Input | LOCK-2025-002 | Tech Smith/ID-5847 | Yes | 0 | Fluke 289 | |
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Grid Disconnection Execution Timestamp
LOTO Procedure Fully Completed and Verified Timestamp
Personal Protective Equipment (PPE) Used During Isolation
Arc-Rated Suit (CAT 4)
Insulated Gloves Class 00
Insulated Gloves Class 0
Face Shield with Arc Protection
Hard Hat
Safety Glasses
Dielectric Safety Boots
Non-Conductive Hand Tools
High Voltage Proximity Detector
Insulated Mat
Was a dedicated Safety Observer present during all high-voltage isolation activities?
Provide detailed justification for working without a safety observer and describe enhanced self-checking procedures, risk assessment, and any supervisory approvals obtained
Established Arc Flash Boundary Distance (meters)
Summary of Hazardous Energy Control Measures and Any Deviations from Standard Procedure
Upload Signed and Approved LOTO Permit Documentation
Upload Photo Evidence of LOTO Application (Locks and Tags)
Emergency Stop (E-Stop) circuit functionality tested and verified?
Were there any safety incidents, near-misses, or unexpected hazards during isolation?
Describe the incident, immediate corrective actions, and whether a formal incident report was filed
Safety Protocol Compliance Self-Assessment
Non-Compliant | Partially Compliant | Fully Compliant | Exceeds Standard | |
|---|---|---|---|---|
Proper LOTO procedure followed | ||||
Appropriate PPE selected and used | ||||
Arc flash boundary maintained | ||||
Capacitor discharge time observed | ||||
Voltage verification performed at each step | ||||
Communication with control room maintained |
Document the complete replacement procedure, from pre-installation checks through final commissioning. Ensure firmware compatibility and verify all performance parameters meet specifications before grid reconnection.
Replacement Inverter Serial Number
Replacement Inverter Manufacturer
Replacement Inverter Model
Replacement Inverter Firmware Version as Received
Is the replacement inverter firmware version compatible with existing plant control system and SCADA?
Describe the firmware upgrade/downgrade procedure performed, including version numbers and change control documentation reference
Pre-Installation Inspection: No visible shipping damage to replacement unit
Pre-Installation Inspection: All accessories, manuals, and certificates included
Configuration parameters backed up from faulted unit before removal (if accessible)
Physical Replacement Procedure Start Timestamp
Physical Replacement Procedure Completion Timestamp
Total Physical Replacement Duration (hours)
Electrical Connection Torque Specification Verification
Connection Point | Specified Torque (Nm) | Applied Torque (Nm) | Verified By (Name/ID) | Verification Timestamp | Torque Within Tolerance | ||
|---|---|---|---|---|---|---|---|
A | B | C | D | E | F | ||
1 | AC Output L1 | 50 | 50 | Tech Smith/ID-5847 | 6/30/2025, 2:30 PM | Yes | |
2 | AC Output L2 | 50 | 49 | Tech Smith/ID-5847 | 6/30/2025, 2:32 PM | Yes | |
3 | DC Positive Bus | 45 | 45 | Tech Smith/ID-5847 | 6/30/2025, 2:35 PM | Yes | |
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Commissioning Test Results and Performance Verification
Test Parameter | Measured Value | Expected/Specified Value | Tolerance (±%) | Pass/Fail | Remarks | ||
|---|---|---|---|---|---|---|---|
A | B | C | D | E | F | ||
1 | Insulation Resistance (MΩ) | 500 | 100 | 0 | Yes | Excellent condition | |
2 | DC Polarity Check | 1 | 1 | 0 | Yes | Correct polarity verified | |
3 | Ground Continuity (Ω) | 0.1 | 0.5 | 0 | Yes | Within spec | |
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Communication Protocol Configured for SCADA Integration
Modbus TCP/IP
Modbus RTU
SunSpec Alliance Protocol
IEC 61850
Proprietary Protocol
Other
Network Configuration Details - IP Address, Baud Rate, Device ID, etc.
Real-time data logging to SCADA system verified and validated?
Performance Test: Ramp-up from 10% to 90% of rated power completed successfully?
Performance Test: Steady-state operation at rated power for minimum 30 minutes?
Performance Test: Ramp-down from 90% to 10% of rated power completed successfully?
Measured Maximum Conversion Efficiency at Full Load (%)
Measured CEC Weighted Efficiency (%)
Upload Final Installation Photo - Front View of Replacement Inverter
Upload Final Installation Photo - Internal Connection Panel
Upload Manufacturer's Commissioning Checklist (signed)
Issues or Anomalies Encountered During Commissioning and Resolution Actions
Final approval section. Grid Reliability Engineer must verify grid code compliance and power quality. O&M Director provides operational authorization for sustained production. Both signatures are mandatory for work order closure.
Grid Reliability Engineer (GRE) Full Name
Grid Reliability Engineer Employee ID
Grid Code Compliance and Power Quality Verification Checklist
Non-Compliant - Critical | Minor Deviation - Approval Required | Fully Compliant | Exceeds Standard | |
|---|---|---|---|---|
Power output within scheduled dispatch limits | ||||
Power factor meets grid operator requirements | ||||
Total harmonic distortion (THD) within IEEE 1547 limits | ||||
Voltage ride-through settings compliant with grid code | ||||
Frequency ride-through settings compliant with grid code | ||||
Anti-islanding protection function tested and active | ||||
Reactive power capability meets plant requirements | ||||
Ramp rate control functions as specified |
Was formal witness testing performed by GRE or designated engineer?
Witness Testing Participant Name and Title
Justify why witness testing was not performed and describe alternative verification methods
Grid Reconnection Authorization and Execution Timestamp
Post-Replacement Power Output at Time of Reconnection (kW)
Expected Power Output Based on Irradiance (kW)
Estimated Daily Production Recovery (USD)
Grid Operator/Utility Notified of Reconnection and Plant Status Change?
Explain notification delay and any mitigation or corrective communication actions taken
Post-Replacement Monitoring Plan - First 72 Hours
Is warranty claim being initiated for the faulted inverter unit?
Warranty Claim Tracking Number
Lessons Learned, Recommendations for Preventive Action, and Knowledge Transfer Notes
Grid Reliability Engineer Digital Signature - Approving grid compliance and technical completion
GRE Approval Timestamp
Operations & Maintenance (O&M) Director Full Name
O&M Director Employee ID
O&M Director Digital Signature - Authorizing return to service and budget closure
O&M Director Approval Timestamp
Upload Final Compiled Documentation Package (all photos, test results, permits)
Overall Quality and Completeness of Documentation Package
Team Safety Culture and Adherence to Protocols During This Operation
Rank the Criticality of Safety Steps Performed (1=Most Critical)
LOTO Authorization and Application | |
Voltage Verification with Proper Meter | |
PPE Selection and Use | |
Arc Flash Boundary Establishment | |
Capacitor Discharge Waiting Period | |
Communication with Control Room |
To configure an element, select it on the form.