What does the daily maintenance of Solar Power Container include?

The daily maintenance of a Solar Power Container includes the following aspects:

I. Component Cleaning and Appearance Inspection

1. Regular Cleaning of Solar Panels
   • Frequency: It is recommended to clean the panels once a month (less frequently during the rainy season). In areas with severe dust, the frequency should be increased.
   • Method: Use a soft-bristled brush or clean water to rinse. Avoid using abrasive materials to prevent scratching the panel surface.
   • Effect: Dust accumulation can reduce power generation efficiency by 10%–25%, which can be restored after cleaning.
2. Appearance Inspection of Solar Panels
   • Damage Detection: Check for cracks, scratches, or bubbles on the panels. Damage may cause hot spots, requiring immediate replacement.
   • Frame Sealing: Inspect the frame sealant for aging or cracks to prevent water ingress.

II. Electrical System Inspection

1. Cables and Junction Boxes
   • Looseness Check: Regularly inspect cable connections for looseness and junction boxes for water or dust accumulation.
   • Insulation Testing: Use an insulation resistance meter to test cable insulation, which should be ≥1MΩ.
2. Inverters and Controllers
   • Cooling Check: Ensure that the inverter’s ventilation ports are unobstructed and the cooling fans are functioning properly.
   • Parameter Monitoring: Use the inverter’s display to check for abnormal voltage, current, or power parameters.

III. Support and Structural Maintenance

1. Support Stability
   • Bolt Tightening: Check for loose bolts on the support structure to prevent deformation due to wind.
   • Corrosion Protection: Apply anti-rust treatment to metal supports to extend their lifespan.
2. Orientation and Angle Adjustment
   • Seasonal Calibration: Adjust the panel angle seasonally to maximize sunlight exposure.

IV. Performance Monitoring and Data Analysis

1. Power Generation Logging
   • Comparative Analysis: Record daily power generation and compare it with historical data to identify anomalies.
   • Efficiency Evaluation: Calculate system efficiency (power generation/theoretical power generation). Efficiency below 80% requires thorough inspection.
2. Fault Warning
   • Monitoring System: Install monitoring software to track system status in real time and set fault alarm thresholds.

V. Safety Protection Measures

1. Lightning Protection and Grounding
   • Grounding Resistance Testing: Test the grounding resistance annually to ensure it is ≤4Ω to prevent lightning damage.
2. Protection Against Small Animals
   • Sealing Holes: Check cable holes for proper sealing to prevent rodent damage.

VI. Professional Maintenance Recommendations

• Annual Comprehensive Inspection: Commission a professional agency to conduct system testing, including EL testing and IV curve testing.
• Spare Parts Inventory: Stock critical spare parts (e.g., inverter capacitors, panel connectors) to minimize downtime.

Maintenance Schedule

Notes

• Power-Off Operation: Always disconnect power before maintenance to avoid electric shock.
• Post-Severe Weather Inspection: Check supports and cables after high winds or heavy rain.
• Professional Training: Complex faults should be handled by professionals to avoid disassembly without expertise.