A Solar Module Mounting Structure (MMS) is designed to operate reliably for more than 25 years. However, continuous exposure to sunlight, rain, wind, dust, temperature changes and environmental conditions can gradually affect its structural performance. Regular inspection and preventive maintenance help identify minor issues before they become major structural problems.
A well-maintained Solar MMS improves plant safety, minimizes unexpected failures and extends the service life of the entire solar power plant.
In this article, we will understand the importance of preventive maintenance, routine inspection procedures, common structural issues and recommended maintenance practices for Ground Mounted Solar MMS.
PROJECT DETAILS
- Project Type
- Ground Mounted Solar Power Plant
- Structure Type
- Fixed Tilt Solar MMS
- Module Configuration
- 2P × 28
- Total Modules
- 56 Nos
- Module Size
- 2382 × 1134 × 35 mm
- Tilt Angle
- 11°
- Design Life
- 25 Years
WHY PREVENTIVE MAINTENANCE IS IMPORTANT
Preventive maintenance helps to
- Improve structural safety.
- Increase service life.
- Detect corrosion at an early stage.
- Reduce unexpected failures.
- Maintain structural alignment.
- Improve plant availability.
- Reduce long-term maintenance costs.
MAINTENANCE FREQUENCY
The inspection frequency depends on site conditions.
Monthly Inspection
- General visual inspection.
- Loose bolts.
- Corrosion.
- Structural damage.
Quarterly Inspection
- Structural alignment.
- Bracing condition.
- Foundation condition.
- Galvanized coating.
Half-Yearly Inspection
- Bolt re-tightening where applicable.
- Column verticality.
- Drainage condition.
- Settlement observation.
Annual Inspection
- Complete structural assessment.
- Foundation inspection.
- Corrosion assessment.
- Alignment verification.
- Maintenance report preparation.
MONTHLY VISUAL INSPECTION
Inspect the complete Solar MMS.
Check
□ Bent members.
□ Loose bolts.
□ Missing hardware.
□ Corrosion.
□ Water accumulation.
□ Damaged galvanizing.
□ Vegetation growth.
□ Animal damage.
COLUMN INSPECTION
Inspect every column for
□ Vertical alignment.
□ Corrosion.
□ Foundation settlement.
□ Damaged coating.
□ Bolt condition.
□ Mechanical damage.
RAFTER INSPECTION
Verify
□ Straightness.
□ Bolt tightness.
□ Connection condition.
□ Corrosion.
□ Permanent deformation.
HAT PURLIN INSPECTION
Check
□ Proper alignment.
□ Surface corrosion.
□ Loose fasteners.
□ Local deformation.
□ Damage due to maintenance activities.
BRACING INSPECTION
Inspect
□ Front Bracing.
□ Rear Bracing.
□ Wind Bracing.
Verify
□ Proper alignment.
□ Tight bolts.
□ No deformation.
□ No missing members.
FOUNDATION INSPECTION
Check
□ Settlement.
□ Cracks.
□ Water logging.
□ Soil erosion.
□ Foundation exposure.
□ Column base condition.
BOLT INSPECTION
Inspect
□ Missing bolts.
□ Loose bolts.
□ Corroded bolts.
□ Damaged threads.
□ Missing washers.
□ Bolt head damage.
GALVANIZING INSPECTION
Inspect every structural member.
Verify
□ Uniform coating.
□ No peeling.
□ No rust spots.
□ No scratches exposing bare steel.
□ No white rust accumulation.
DRAINAGE INSPECTION
Check
□ Surface water drainage.
□ Water stagnation.
□ Soil erosion.
□ Blocked drainage channels.
Poor drainage may accelerate corrosion and foundation deterioration.
VEGETATION CONTROL
Remove
- Grass touching structural members.
- Bushes near foundations.
- Climbing plants.
- Tree branches over module tables.
Proper vegetation control improves inspection visibility and reduces corrosion risk.
POST-STORM INSPECTION
After heavy wind, cyclone or storm,
Inspect
□ Bent columns.
□ Twisted rafters.
□ Damaged Hat Purlins.
□ Loose bracing.
□ Foundation movement.
□ Missing bolts.
□ Misaligned structure.
COMMON STRUCTURAL DEFECTS
The following defects are commonly observed during long-term operation.
- Corrosion.
- Loose connections.
- Foundation settlement.
- Bent members.
- Misalignment.
- Damaged galvanizing.
- Water stagnation.
- Missing hardware.
CORRECTIVE ACTIONS
If defects are identified,
- Record the observation.
- Classify the severity.
- Repair or replace damaged components.
- Tighten loose connections.
- Restore corrosion protection where required.
- Reinspect after completion.
MAINTENANCE RECORDS
Maintain the following documents.
- Monthly Inspection Report.
- Quarterly Inspection Report.
- Annual Structural Inspection Report.
- Maintenance Register.
- Repair Log.
- Corrosion Monitoring Report.
- Bolt Replacement Register.
RECOMMENDED TOOLS
Typical inspection tools include
- Measuring Tape.
- Spirit Level.
- Digital Level.
- Torque Wrench.
- Vernier Caliper.
- Camera.
- Inspection Checklist.
- PPE Equipment.
SAFETY DURING INSPECTION
Always follow safe working practices.
- Wear PPE.
- Use approved access equipment.
- Avoid climbing on structural members.
- Do not inspect during lightning or severe weather.
- Follow site safety procedures.
BEST PRACTICES
- Inspect the structure at regular intervals.
- Repair minor defects immediately.
- Replace damaged members without delay.
- Keep detailed maintenance records.
- Maintain proper site drainage.
- Protect galvanized surfaces from mechanical damage.
BENEFITS OF PREVENTIVE MAINTENANCE
A proper maintenance program provides
- Improved Structural Reliability.
- Reduced Downtime.
- Lower Repair Costs.
- Better Plant Availability.
- Increased Service Life.
- Improved Safety.
- Higher Return on Investment.
CONCLUSION
Preventive maintenance is essential for ensuring the long-term performance of a Ground Mounted Solar Module Mounting Structure. Regular inspections, timely repairs and proper documentation help maintain structural integrity throughout the operating life of the solar power plant. A proactive maintenance strategy not only reduces repair costs but also improves safety, reliability and overall plant performance.
NEXT ARTICLE
Part 14 – Solar MMS Material Selection Guide – Choosing the Right Steel Sections, Corrosion Protection, Fasteners and Galvanizing Requirements for Long-Term Structural Performance.