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A research team in Germany has examined whether compressive stress relaxation measurement (CSRM) can serve as a tool for tracking polymer degradation in aging photovoltaic modules, according to pv magazine. The work, published in Polymer Testing, involved scientists from Anhalt University of Applied Sciences and Fraunhofer CSP.
CSRM is a non-destructive method normally applied in manufacturing quality control to gauge the degree of encapsulant cross-linking after lamination. The technique presses a tip into the rear surface of a module and records how the force declines while the indentation depth is held constant, a response that reflects the mechanical properties of both the encapsulant and the backsheet.
The researchers said the publication extends CSRM beyond lamination control to monitoring the mechanical response of the mini-module rear side. To improve resolution and sample throughput, they used cross-linking density to calibrate the measurement, and they sought to decouple encapsulant degradation from backsheet degradation during weathering.
The team built 200 mm by 200 mm mini-modules containing passivated emitter and rear contact (PERC) solar cells, ethylene vinyl acetate (EVA) encapsulants, and polyethylene/polyethylene terephthalate (PET) backsheets. Lamination times at 155 C were varied to produce different degrees of cross-linking.
For each measurement, the test location was heated to 89 C, a 4 mm steel tip was pressed roughly 100 um into the module rear surface with a force below 20 N, and the decline in force was recorded while the tip stayed in place.
Modules underwent damp heat testing at 85 C and 85% relative humidity for up to 3,500 hours, or combined heat and ultraviolet irradiation at 85 C, 60% relative humidity, and an irradiance of 227 W/m2 for up to 2,000 hours. At 250-hour intervals, the team used CSRM to track mechanical changes and measured electrical performance. Solvent tests and thermal analyses helped separate changes in encapsulant cross-linking from backsheet degradation.
The researchers reported that after the first 250 hours of damp heat testing, the encapsulants showed an increase in cross-linking degree while differences between samples persisted throughout the test. As a result, module power degradation correlated with the initial cross-linking state. By the end of the test, both the encapsulant and the backsheet had degraded, producing a drop in the CSRM response.
The results also indicated that encapsulant cross-linking density subsequently decreased, while the backsheet underwent post-crystallization and showed chain scission.
In the combined damp heat and ultraviolet test, post-cross-linking occurred within the first 250 hours and led to a leveling of cross-linking states, according to the researchers. The erased chemical differences among encapsulants were reflected in similar module power degradation. The team concluded that overacceleration should be avoided to obtain realistic reliability predictions.
Interactive table based on the Store Companies dataset for this report.
This report provides an in-depth analysis of the EV Solar Modules market in Germany, covering market size, growth trajectory, demand structure, supply capability, trade flows, pricing, competitive landscape, and forecast to 2035.
The study is designed for manufacturers, distributors, importers, exporters, investors, procurement teams, advisors, and strategy teams that need a consistent, data-driven view of market dynamics and a transparent analytical definition of the product scope.
This report covers the market for EV Solar Modules, which are photovoltaic modules specifically designed and integrated for use in electric vehicles to convert solar energy into electrical power for auxiliary systems or traction battery charging.
The report combines the standard market-statistics backbone with strategic chapters that are useful for commercial planning, sourcing decisions, market entry, competitor monitoring, and portfolio prioritization.
The market is segmented into decision-relevant buckets so that demand drivers, pricing logic, supply constraints, and competitive positions can be compared across the same analytical frame.
The classification coverage encompasses EV Solar Modules categorized by product type (including monocrystalline, polycrystalline, thin-film, flexible, integrated, portable, and bifacial modules), by application (such as bioprocessing and drug manufacturing, cell and gene therapy workflows, research and development, and quality control and release testing), and by value chain segment (including raw material and input suppliers, qualified manufacturing and processing, QC, validation and documentation, and procurement by CDMOs, biopharma, and laboratories).
Coverage focuses on Germany and includes demand, supply capability where present, trade flows, pricing, competition, and outlook.
The report combines official statistics, trade records, company disclosures, product-level evidence, and analyst validation. Data are standardized, reconciled, and cross-checked to keep market sizing, trade flows, pricing, and forecasts comparable across countries and time periods.
All indicators are mapped to a consistent product definition and reviewed against the segmentation framework used in the Table of Contents.
Report Scope and Analytical Framing
Concise View of Market Direction
Market Size, Growth and Scenario Framing
Commercial and Technical Scope
How the Market Splits Into Decision-Relevant Buckets
Where Demand Comes From and How It Behaves
Supply Footprint and Value Capture
Trade Flows and External Dependence
Price Formation and Revenue Logic
Who Wins and Why
How the Domestic Market Works
Commercial Entry and Scaling Priorities
Where the Best Expansion Logic Sits
Leading Players and Strategic Archetypes
How the Report Was Built
Key player in solar inverter technology, relevant for EV charging integration
Offers glass-glass modules; expanding into EV-integrated solar solutions
Produces modules for residential and commercial use, including EV charging
Develops modules with integrated microinverters for EV applications
Distributes modules and provides EV charging infrastructure solutions
Supplies manufacturing tech for PV modules used in EV solar
German subsidiary produces high-efficiency modules for EV integration
Focuses on large-scale PV for EV charging parks
Integrates solar modules into EV charging infrastructure
Develops solar farms for EV fleet charging
Offers integrated solar and EV charging packages
Provides solar modules for residential EV charging
Distributes modules for private and commercial EV use
German entity trades modules for EV solar applications
Inverters used in EV-integrated PV systems
German subsidiary provides inverters for EV solar modules
German branch distributes inverters for EV solar systems
German entity supplies inverters for EV charging
Provides inverters and modules for EV solar integration
Offers integrated solar and EV charging systems
Produces solar modules for residential EV integration
Supplies components for PV modules used in EV systems
Develops integrated solar and EV charging solutions
German branch provides inverters for EV solar modules
Distributes modules for commercial EV charging
Trades modules for large-scale EV solar projects
Integrates solar modules into EV charging parks
Develops solar farms for EV fleet charging
Procures modules for EV charging infrastructure
Develops solar parks for EV charging
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