Covestro and SolarKapital

All parts of the solar panel can play a role in increasing energy efficiency, not least the glass panels. Covestro and SolarKapital offer a solar power boost for both new and existing solar panels. New First Solar photovoltaics (PV) modules are achieving 4% gains with our technology.
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First Solar PV modules achieve a 4% energy gain

As part of a continuing quest to boost solar efficiency, solar energy, financial services firm SolarKapital decided to run a commercial project using the Covestro Retrofit Anti-Reflective (AR) coating at its solar plant in Türkenfeld, Bavaria, Germany. The result: a 4% extra energy gain in PV modules manufactured by the First Solar company.

A hands-on approach

SolarKapital is an owner-managed, financial services provider that invests its equity and know-how along the entire solar value chain – including the acquisition of its own solar projects as an independent power producer (IPP).
For a multi-faceted solar player like SolarKapital, the importance of strong and sustainable growth is paramount. The company employs a hands-on approach and is constantly searching for creative ways to maximize the value of its assets: enter the Covestro Retrofit AR coating.

Evaluating the technology

Launched in 2019, the Retrofit AR coating has already gained significant market traction because of its ability to achieve a power gain of 2-3% in older PV modules. The coating is applied directly onto the modules in the field and has been successfully evaluated by several Covestro partners, including WiseEnergy.
SolarKapital decided to conduct a commercial application of this technology at its facility in Türkenfeld – one of twelve PV plants that the company owns and operates across Germany.
A specialist Covestro team visited the site in September 2019 and applied the coating directly onto modules from leading industry player First Solar, taking care to adhere to its comprehensive guidelines governing third-party application.
The power output was then continuously measured from the day immediately following the coating application. Monitoring is ongoing.  

Improving performance of older PV modules

The results have been beyond expectations. The First Solar PV modules have achieved a sustained extra energy gain of more than 4% when compared to an extra power gain of between 2-3% across other different European PV plants in previous industrial scale coating projects.
In particular, our coatings were shown to react very well with the uncoated cadmium telluride thin film PV modules from First Solar.
SolarKapital Managing Director, Dr. Andreas Leimbach said of the project: “We knew about this technology and were excited about its potential for our business and investors. Of course, we needed to see for ourselves whether it delivered on that promise – and I’m delighted to say that the resultant energy gains speak for themselves.”
According to Dr. Leimbach, the value delivered by Covestro goes beyond pure power gain. “A major goal of this project was to evaluate the wider implications of implementing a retrofit. How quickly and professionally could the Covestro team apply the coating? Also, how could they support us in better evaluating and understanding the monitoring data? In both cases they were able to deliver. Furthermore, another important aspect to consider were the environmental implications of the coating supplies and processes. Covestro also covered this topic to the satisfaction of its client.”
SolarKapital is now considering extending the program in their PV assets – thus continuing its commitment to meeting the needs of investors, society, and the environment alike. 

A major goal of this project was to evaluate the wider implications of implementing a retrofit. We assessed whether or not we achieved this goal by evaluating three different aspects of performance: speed and professionalism, level of support, and environmental implications. Covestro was able to deliver in all three areas. ”

Dr. Leimbach

SolarKapital Managing Director

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