Expected lifetime of rooftop PV plant
Rooftop PV plants have no moving parts and therefore don't suffer from wear and tear, making them extremely reliable. The expected lifetime for the major components in your rooftop solar PV system is at least 25 years, or even longer.
Inverter - This is the only major component in the rooftop plant that will require replacement during the lifetime of the plant.Typical life is 5-10 years
Mounting structures - These should last the full 25 years of the plant's lifetime
Batteries - Battery backups can last as long as 10 years with careful maintenance, but 3-5 years is a more typical lifespan
Modules are warranted against manufacturing defects for a period of 5 years. In addition, their power output is also warranted 0-10 years for 90% of the rated output power 10-25 years for 80% of the rated output power This means that a 200 Wp panel will generate as much power as a 180 Wp panel in 10 years' time (90%) and 160 Wp panel in 25 years' time (80%).
Note: It is normal for solar panels to lose some of their generating power over time (about 0.5% a year). This is known as degradation.
The crystalline PV module are certified to comply with IEC 61215/IS 14286 - Design qualification and type approval IEC 61730 - Safety IEC 61701/IS 61701 - Salt mist corrosion testing (for panels installed in coastal areas or in maritime applications) Panels are also be supplied with the MNRE mandated RFID tag that allows the panels to identified and tracked to the manufacturer for verifying performance.
Inverters are typically warranted for 1 year, with optional extension up to 5 years.
IEC 61683/IS 61683 - Efficiency IEC 60068-2 (1, 2, 14, 30) - Environmental testing (Cold, Dry heat, Change of temperature, Damp heat cyclic)
Mounting structures are typically warranted for 1 year, with optional extension up to 5 years.
While battery certifications would depend on the application for which they are required, consumers can perform simple checks to verify if the battery is genuine Capacity- weight - Capacity should correspond with the weight e.g., a 100 Ah battery should weigh about 32 Kgs. Batch number - This should be embossed (and not provided through a sticker) on the body
Batteries are typically warranted for 1 year, with optional extension up to 5 years.
IEC 60068-2 (1,2,14,30) - Environmental testing (Cold, Dry heat, Change of temperature, Damp heat cyclic)
Charge controllers and MPPT units are typically warranted for 1 year, with optional extension up to 5 years.
IEC 60227/IS 694 - General test and measurement of PVC cables IEC 60502/IS 1554 (Part I & II) - Working voltage up to and including 1100 V and UV resistance for outdoor installation of PVC cables