Sunrise Energy Co., Ltd.
Sunrise Energy Co., Ltd.

Who Determines the Lifespan of Solar Panels?

Degradation and failure modes of the solar panel


The operating lifespan of a solar panel, which doesn't have any moving parts (a primary source of reliability issues in other types of power generation systems), is typically determined by the stability and corrosion resistance of the materials used in the solar panel. However, there are several failure modes and degradation mechanisms that can reduce power output or cause solar panels to fail. Almost all of these mechanisms are related to water ingress or temperature stress.


Degradation and failure of the solar panels


Degradation mechanisms may involve a gradual reduction in power output over time of the solar panel or an overall decrease in power due to failure of individual solar cells in the solar panel. 

Shorted Cells

Shorts can occur at the interconnection of cells, and this is a common failure mode for thin-film cells because the top and back contact points are closer together and more susceptible to areas of pinholes or cell material corrosion or damage. 

Open Cells


This is a common failure mode, although redundant contact points and "interconnect buses" allow the cells to continue to function.


Cracking of the solar panels

Shattering of the top surface may occur due to damage, thermal stress, handling, wind or hail.

Solar panel delamination

Delamination of modules was a common failure mode in early modules and is no longer a problem. It is usually caused by a reduction in bond strength, either from environmentally induced moisture or photothermal aging, and stress caused by varying thermal and humidity expansion.

Hot spot failures

Mismatched, cracked or shadowed cells can lead to hot spot failure.

Bypass diode failure

The bypass diode itself, used to overcome cell mismatch problems, can fail, usually due to overheating, usually due to undersizing. If the junction temperature is kept below 128°C, this problem will be minimized.

Failure of encapsulants

UV absorbers and other encapsulant stabilizers ensure the long life of solar module encapsulants. However, slow depletion does occur through leaching and diffusion, and once the concentration falls below a critical level, rapid degradation of the encapsulant material occurs. In particular, browning of the EVA layer, accompanied by the accumulation of acetic acid, has led to a gradual reduction in the output of some arrays, particularly those in concentrated systems.

Sunrise Energy Co., Ltd. has an annual capacity of 2GW of PV modules, compatible with market mainstream P-type (PERC), N-type modules (TOPCON), and will produce heterojunction modules in the coming year. The current production capacity mainly produces the whole series of M10 (182mm) products. M10 module - Neptune series N-type model 72 version module maximum power 585W, power generation efficiency 22.67%, 30-year linear power output 87.4%.

All-black modules based on M10 (182mm) cells, supplying European energy market is expected to exceed 1,000,000+ households, holding a certain market share in Europe, such as the Netherlands, Germany, Belgium and other countries, the PV star on the roof, true all-black, true architectural aesthetic integration. The quality of Hoyu's all-black module process has passed the TUV test and has been awarded the invention patent.