Salt mist is a corrosive agent that will reduce the output of photovoltaic modules. Salt mist corrosion usually occurs near the sea or under conditions of high humidity and heavy rain. It will affect key components, such as junction boxes, glass, and frames, thereby reducing the performance and life of photovoltaic modules.

Photovoltaic (PV) modules are electrical devices that are typically used for continuous outdoor exposure during their lifetime. Highly corrosive humid atmospheres, such as marine environments or locations close to the ocean or other large salt water bodies, may eventually degrade certain photovoltaic modules (corrosion of metal parts, deterioration of performance of certain non-metallic materials-such as protective coatings). Layers and plastics-by absorbing salt, etc.) cause permanent degradation, thereby impairing their function. There is also a temporary corrosive atmosphere where salt is used to melt ice on streets and roads in winter.

Salt Mist Corrosion Testing Conditions

The test is carried out in a professional salt spray chamber. The chamber atomizes the saline solution, producing mist and leaving salt deposits around the device under test. Engineers carefully monitor the salt spray environment to ensure that the correct salt density, pH, deposition rate and temperature are maintained.

Bluesun Solar passed Salt Mist level 6, which is the most severe testing condition.  It includes 8 weeks of intensive periodic, corrosive salt spray and humid storage to stimulate the harsh marine environment.

What Factors Caused Corrosion

Anything that contains metal is susceptible to corrosion, including metal photovoltaic modules. The corrosion of photovoltaic modules will reduce the output of panels and will affect the production of all your systems.

As we all know, the design of solar panels is guaranteed for decades. Because solar cells and electronic components are protected by sealants, encapsulating polymers and strong tempered glass. However, over time, water vapor and chemicals in the air can enter the interior and cause corrosion.

Generally, metals corrode faster in hot and humid environments, such as tropical and coastal areas. In other words, in a less humid climate, the rate of corrosion of photovoltaic systems is much slower.

How to Prevent Salt Mist Corrosion

First, make sure to cooperate with a reliable supplier who uses a good brand laminator and provides employees with a good production process and a good SOP. In addition, please make sure that your supplier has all corrosion certifications, such as salt spray corrosion level 6.

In  conclusion, all our certifications can be obtained in our download center.

More information regarding Bluesun Solar Panels, feel free to contact us: info@bluesunpv.com