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1. Introduction
1.1. About This Handbook
1.2. Target Audience
1.3. Related Ordinances, Regulations and Guidelines
2. Design Considerations
2.1. General
2.2. PV Modules
2.3. Inverters
2.4. Power Optimisers
2.5. Surge Arresters
2.6. DC Isolating Switches
2.7. Isolation Transformers
2.8. Batteries (for Standalone or Hybrid PV Systems)
2.9. Battery Charge Controllers (for Standalone or Hybrid PV Systems)
2.10. Application of Technology
2.11. Others
3. Operation and Maintenance
3.1. Factors Affecting System Performance
3.2. Operation Procedures
3.3. Emergency Preparedness
3.4. Preventive Maintenance
3.5. Corrective Maintenance
3.6. Spare Parts Management
3.7. Safety and Environmental Management
3.8. Structure and Qualifications of O&M Teams
4. Record/Documentation
4.1. Asset Information
4.2. Maintenance Record Management
4.3. Information Management
4.4. Stakeholders Management
5. Appendix A:Sample Checklist for Inspection and Testing of Solar PV Systems
5. Appendix A:Sample Checklist for Inspection and Testing of Solar PV Systems
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Record/ Documentation

4.1 Asset Information

The O&M documents should be kept properly and updated after each system modification. The recommended O&M documents are listed below:
Action General Practice Best Practice

Handover report including but not limited to:

Handover list
Site location and location map with access routes
System capacity
Technical information of PV modules (e.g., manufacturer/ brand, model number, type, size, rating of each PV module, tilting angle, maximum operating voltage and maximum operating current, short circuit current)
Technical information of inverters (e.g., manufacturer/brand, model number, maximum input current, maximum input power, maximum voltage, maximum power point voltage range)
Technical information of isolation transformers (e.g., manufacturer/brand, model number, type of connection, primary/secondary voltage, class of insulation, power rating, power factor)
Utility recommended Operation Procedures
Batteries size and type, if any
Warranties provided
Project completion date and the end date of defect liability period (DLP)
Spare parts list with makes and model numbers
Design calculation including the solar analysis report, calculation of the annual electricity generation, structural calculation

As-fitted drawings including:

Schematic diagramme of the PV system and the electrical installation showing all components, cable size, earthing connection, and the associated Utility metering points/supply points
Layout plans showing the major electrical equipment such as PV modules, inverters, isolation transformers, isolating switches, main switches, etc.
Structural drawings with Registered Structural Engineer reports
Generating Facility (Form GF1) registration submission record if appropriate (including Form WR1 and WR2 if any)
Certification of Environment Management System (e.g., ISO 14001) and Safety Management System (e.g., OHSAS 18001 or ISO 45001)
Power company submissions and approval records
Testing and commissioning reports
Operation and maintenance manuals including operation procedures in case of system failure, emergency shutdown and isolation procedures
Schedule of planned examination and testing
Emergency contact lists including owner/representative, REC, REW and utility (in the case of grid connection)

4.2 Maintenance Record Management

4.2.1 General Practice

The owner should keep the preventive maintenance plan, inspection/maintenance records of the installations for a period of not less than 3 years from the date of the inspection/maintenance.
The owner should keep the specification, testing and commissioning report, operation and maintenance manual of the installation for future reference by the maintenance staff.
Records for major equipment replacement (e.g., location and number of PV modules replaced) and the preventive maintenance records should be kept properly.
The preventive maintenance and overhauls records with clear maintenance schedule and procedures should be kept properly.
Sample checklist for inspection and testing of PV system is attached in Appendix A below, which should be read in conjunction with the previous testing and commissioning reports, before carrying out inspection and testing.

4.2.2 Best Practice

The maintenance logbook, preventive maintenance and overhauls records with clear maintenance schedule and procedures shall be digitised and reviewed regularly such that the maintenance contractor is able to predict the trend of material deterioration and formulate a project specific preventive maintenance schedule.

4.3 Information Management

4.3.1 General Practice

The certificates and documentation as per statutory requirements shall be kept properly.

4.3.2 Best Practice

The stored records should be reviewed and audited regularly.

4.4 Stakeholders Management

4.4.1 General Practice

The PV system owner or his representative(s) should be notified about:
The schedule of preventive maintenance
When the equipment will be shut down for maintenance and the duration
Updating of emergency contact list as mentioned in Section 3.3.1

4.4.2 Best Practice

The PV system owner or his representative(s) should be kept informed on the progress of the O&M activities and the obsolescence of spare parts without suitable substitutes.
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