How to Maintain Your Solar PV System

Solar PV systems are quite robust in construction and can provide trouble-free operation for several years. However, individual components of PV systems – such as inverters, cables, diodes, etc. – have their own life spans, and can be affected by factors that may work upon them in isolation.

Therefore set up and maintain a periodic system inspection schedule to ensure peak performance throughout the year. Ideally, here is what your basic inspection schedule should look like:

Inspection FrequencyComponentWhat to Inspect
DailyInverterCheck for faulty displays.

Also check for heating up of the inverter. If the device is too hot to touch, immediately hut down system and call for a qualified technician.
MonthlyPV Array

Support Structure/Racking

Wiring Connections

Batteries (if present)
Soiling/accumulation of debris: Check for bird droppings, fallen leaves, layer of dust caused by dust storms, air pollution etc. If present, clean with fresh water and a soft sponge. DO NOT use brushes or dry cleaning equipment

Check for any warping of structure caused by storms or extremes of temperatures or other mechanical stress.

Check for loose connections at the input and output side of each component (arrays, combiner box, inverter, energy meter, etc.)

Check for connections with charge controller and the inverter. Also check for acid formation at battery terminals.

Every six monthsPV Array

PV Combiner Box/Junction Box (if present)



Check for delamination

(If mounted outdoors) Is there any accumulation of moisture or presence of insects/rodents etc.

Check for blown fuses

Check for charred spots, breaks in insulation and any damage caused by animals or insects. Also inspect connections to individual components
Every three – four yearsFull System Scan

For Outdoor Mounted Inverters

(To be performed by a qualified technician) Repeat all system measurements performed during system commissioning

Check for presence of humidity and breaks in component housing
As and when suspectedPV Modules

PV Combiner/Junc-tion Box

AC Protective Equipment
Check for I-V curves and peak output (to be performed by qualified technician)

Check string fuses

Check Line Circuit Breakers, AC fuses and Residual Current Devices (RCDs)

Note that most of the above checks are meant to be performed visually only. In the interest of your safety and system integrity, for any checks that require technical expertise, always call a qualified technician.

To read more about how to maintain your solar pv system, click here.

Aniruddha Bhattacharjee
Aniruddha Bhattacharjee
Aniruddha has been a renewable energy researcher and report writer for over 3 years. He has also been a content developer for multiple websites, including portals on travel and tourism, restaurants and personal finance. He holds a bachelor's degree in mechanical engineering and a master's in endangered species conservation. Apart from renewable energy, Aniruddha is a keen motor sports and aviation enthusiast, and a beginner in photography.
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