The various activities related to operation and maintenance of rooftop solar plant can be classified as below:
- Preventative maintenance: It comprises of routine inspection and servicing of equipment with a specific task periodicity of all key components. This is done ?to prevent breakdowns and unnecessary production losses. Preventive maintenance is carried out in a manner to maintain the component warranties in place. The O&M contract includes scope of services under preventive maintenance and each task periodicity.
- Corrective maintenance: It covers the activities to be performed to restore component/s to a status where it can perform the required function. The corrective maintenance takes place after a failure detection either by remote monitoring and supervision or during regular inspections and specific measurement activities. Usually the contractor is obliged to comply with certain response times when there is a need of corrective maintenance.
- Condition-based maintenance: Condition-based maintenance implicates monitoring of equipment condition and plant operations on a real-time basis and addresses a potential problem at a very early stage to prevent downtime. This approach uses periodic measurements to detect evidence that equipment is deteriorating, with the aim of extending service life by avoiding impending problems.