For the purpose of serving as the encapsulant material in solar panels, ethylene-vinyl acetate, also known as EVA, is an essential component in the field of photovoltaic technology. The EVA photovoltaic films act as the protective covering, encasing the fragile solar cells and ensuring that they will continue to be efficient and durable over time. Potential-Induced Degradation (PID), on the other hand, has arisen as a key concern in the solar industry, having an effect on the performance of solar panels as well as their longevity.

An Introduction to PID and the Potential Impact It Could HaveThere is a phenomena known as induced degradation, or PID, which occurs when a voltage potential between the solar cells and the grounded frame of a photovoltaic module causes the power output of the module to decrease over time. This can lead to significant energy losses, which in turn reduces the overall efficiency of solar panels and potentially shortens their lifespan. PID is primarily brought on by the influx of sodium ions from the glass into the EVA, which results in the formation of a conductive path and has an impact on the electrical performance of the solar cells.

Exactly What Are Anti-PID Additives Used For?

PID additives, also known as anti-PID additives, are substances that have been carefully created to reduce the negative effects of PID in EVA photovoltaic films. In order to improve the efficiency and durability of solar panels, these additions serve a number of important roles, including the following:

1. One method for reducing the movement of sodium ions

For the purpose of preventing sodium ions from moving from the glass to the EVA, anti-PID additives perform the function of a barrier. Inhibiting this movement has the effect of preventing the creation of a conductive conduit, which in turn reduces the likelihood of PID occurring.

2. Improvements to the Insulation of Electrical Wires

Because of the additives, the electrical insulating characteristics of the EVA film are improved, which helps to ensure that the solar panel’s electrical components continue to function properly. This contributes to the prevention of leakage currents and preserves the highest possible performance.

3. Increased Surface Adhesion

Additionally, anti-PID chemicals contribute to enhanced adhesion between the EVA film and other components of the solar panel, such as the glass and the backsheet. This is especially beneficial for solar panels. It is because of this that the panel’s structural integrity and long-term stability are guaranteed.

Workings of the Mechanisms

Various pathways are utilised by anti-PID compounds in order to accomplish their protective effects, including the following:

1. The Capture of Sodium Ions

Certain additives have particular chemical components that are capable of capturing sodium ions and limiting their mobility inside the EVA matrix because to their presence.

2. The formation of defences

Some of the chemicals that are included in the EVA film create a physical barrier that prevents sodium ions and other pollutants from diffusing through the film.

3. The process of cross-linking

Additionally, anti-PID additives have the ability to enhance cross-linking within the EVA polymer matrix, which results in the formation of a structure that is more strong and stable, and is less vulnerable to PID.

The Advantages of Using Anti-PID Additives

There are a number of significant advantages that can be gained from the introduction of anti-PID compounds into EVA solar films:

1. An Increase in Productivity

Through the mitigation of the effects of PID, these additives contribute to the preservation of the efficiency of solar panels during their entire operational lifetime. Consequently, this results in enhanced energy yields as well as increased returns on investment for solar installation projects.

2. A Longer Average Lifespan

Using solar panels that have been treated with anti-PID chemicals makes them less likely to deteriorate over time, which ultimately results in an increased lifespan for the overall photovoltaic system.

3. Increased Dependability

The improved electrical insulation and stability that are offered by the additives are factors that contribute to the overall dependability of solar panels, particularly in conditions that are very harsh.

4. Reductions in cost

The prevention of performance losses that are connected to PID can result in significant cost savings for solar plant operators, as it reduces the amount of maintenance and replacements that are required.

Applications in the Industry

Anti-PID additives are utilised extensively in the solar industry, particularly in the production of EVA photovoltaic films with a high degree of efficiency. Examples of their applications include:

1. The Production of Modules

Anti-PID additives are incorporated into the EVA encapsulant layers by manufacturers during the fabrication of solar modules at the manufacturing facility. Consequently, this guarantees that the completed panels are resistant to PID.

2. Retrofitting 

It is possible to upgrade old solar panels that have been impacted by PID with EVA films that contain anti-PID chemicals in certain particular circumstances. It is possible to restore performance and extend the life of older panels with the use of this method.

When it comes to improving the performance and durability of EVA photovoltaic films, Anti-PID additives are an essential component that plays a significant role. Solar panels benefit from these additions because they reduce the impacts of potential-induced degradation, which in turn leads to increased efficiency, a longer lifespan, and higher reliability. Their modes of action, which include the capture of sodium ions, the development of barriers, and the formation of cross-links, all work together to produce an encapsulant layer that is more durable and lasts for a longer period of time. Despite the ongoing development of the solar industry, anti-PID additives continue to be an essential component in the search for photovoltaic systems that are both more efficient and more environmentally friendly. RM2320 is a glycidyl methacrylate grafted polymer with ethylene vinyl acetate copolymer as the matrix material and has a white translucent granular appearance. It is an epoxy group functionalized EVA anti-PID additive, which can very well improve the anti-PID of EVA photovoltaic films. performance!