Winter Low-Light Solar Module Performance: IBC Full Blackvs. Bifacial Glass-Glass Module Comparison

Table of Contents

1. Introduction
2. Component Introduction and TechnicalPrinciples
3. Test Environment Setup and Methodology
4. Testing Process and Performance Comparison
5. Design and Aesthetic Considerations
6. Recommendations
7. Conclusion

Introduction

The growing need for renewable energy sources has led to significant progress in solar technology, presenting a wider array of component options. Notably, IBC (Interdigitated Back Contact) full black solar panels have emerged as a prominent choice due to their exceptional efficiency and application-specific advantages. This is especially relevant in conditions of low light or during winter months, where the selection of an appropriate solar panel is essential for maximizing system efficacy. This article seeks to provide an in-depth comparison of IBC full black panels and bifacial glass-glass panels under such conditions, through a series of empirical tests to guide decision-making.

In this vein, solar PV specialist M1Molter from Germany has performed an extensive evaluation comparing Maysun Solar's 430W IBC full black panels with bifacial glass-glass panels of similar ratings. The aim of this study is to elucidate the performance variances between these two sophisticated technologies in low-light or winter scenarios, thus aiding consumers in navigating the plethora of choices available.

Module Introduction and Technical Principles

IBC Full Black Modules

IBC (Interdigitated Back Contact) technology innovatively positions all electrical contacts at the back of the solar panel, thereby eliminating electrodes on the front surface. This arrangement reduces light obstruction and expands the area for light absorption. By adopting a back-contact framework, these modules significantly enhance light absorption, leading to greater photovoltaic conversion efficiency. Despite being constructed with a single layer of glass, IBC full black modules come with a 25-year warranty, showcasing the manufacturer's trust in their long-term reliability and performance.

Bifacial Glass-Glass Modules

Characterized by a dual-layer glass encapsulation, bifacial glass-glass modules incorporate solar cells encased between two layers of robust, transparent glass. This structure not only extends the module's lifespan by offering enhanced protection but also improves its resilience against environmental challenges. Crucially, these modules can generate power from both sides, capturing and converting light in either direction. This dual-sided energy capture significantly boosts efficiency, particularly in suboptimal lighting, by utilizing diffused and reflected light for increased power generation. Relative to IBC full black modules, bifacial glass-glass modules often feature extended warranty periods of up to 30 years.

Test Environment Setup

The tests were conducted under simulated winter light conditions, including scenarios of full sunlight and overcast skies without direct sunlight. The goal was to evaluate the modules' performance across different weather conditions thoroughly, ensuring a reliable and fair basis for comparison to aid users in selecting from the vast range of solar modules available.

Testing Methodology

The methodology employed rigorous scientific procedures, encompassing:

1. Installation of both module types in identical conditions and orientations.
2. Use of precise measurement instruments to capture real-time power output and total electricity generation.
3. Continuous monitoring of environmental factors during testing, such as light intensity and temperature.

(The experimenter used a portable power station to measure and record the performance of the solar panels under different conditions, including the generated power (in watts) and the total energy output (in kilowatt-hours).)

Testing Procedure

Preliminary Evaluation (In Conditions of Bright Winter Sun)

430W Bifacial Glass-Glass Solar Panel: In conditions of direct sunlight during winter, early assessments showed that the consistent power output from the 430W bifacial glass-glass solar panel stood at 283 watts, peaking at 315 watts.

430W IBC Full Black Solar Module: In contrast, the 430W IBC full black solar module exhibited slightly higher output power under the same conditions, stabilizing around 310 watts, with the peak also reaching 310 watts. 

Extended Duration Evaluation (Spanning Two Weeks, Under Challenging Weather Conditions)

The extended evaluation, which took place over two weeks and included a range of adverse weather conditions, highlighted the distinct performance disparities between the 430W IBC full black solar module and the 430W bifacial glass-glass solar module.

430W IBC Full Black Solar Module: Throughout the testing phase of approximately 10 days, the 430W IBC full black solar module succeeded in generating 2.6 kilowatt-hours (kWh) of electricity.

430W Bifacial Glass-Glass Solar Module: During the identical timeframe, the 430W bifacial glass-glass solar module accounted for 2.16 kilowatt-hours (kWh) of electricity production.

Performance Evaluation

Comparison of Power Output Under Bright Winter Sun Conditions

In the bright sunlight of winter, the IBC full black module from Maysun Solar reliably delivered a power output of 310 watts, reaching a peak at the same 310 watts. Conversely, the bifacial glass-glass module under equivalent conditions managed a stable output of 283 watts, with a peak at 315 watts. This comparison underscores the IBC full black module's superior performance against the bifacial glass-glass module in conditions of diminished light.

Comparative Analysis of Long-Term Power Output and Energy Production (Across Two Weeks, Including Dim Light Conditions)

The findings from the testing period, which encompassed about two weeks and included times of low winter light, revealed that the 430W IBC full black solar module produced 2.6 kilowatt-hours (kWh) of electricity, whereas the 430W bifacial glass-glass solar module generated 2.16 kilowatt-hours (kWh). Hence, the 430W IBC full black solar module exhibited approximately 20% higher electricity production than the 430W bifacial glass-glass solar module, indicating its enhanced efficiency in low-light scenarios.

On a specific test day (around December 16th), the peak power output of the 430W IBC full black solar module reached 117 watts, while the peak power output of the 430W bifacial glass-glass solar module was 100 watts. This further confirms the performance advantage of the 430W IBC full black solar module under low-light conditions, showing an improvement of 17% in comparison. 

These findings starkly underscore the comparative analysis of the two solar module types under varied testing conditions. The IBC full black module outperformed in terms of power output and energy generation in nearly all testing scenarios, particularly in low-light environments, underscoring its superior efficiency and suitability.

Design and Visual Appeal

Sophisticated Full Black Aesthetic: The sleek, all-black design not only enhances the visual appeal but also ensures the panels integrate seamlessly with various architectural styles, providing a cohesive and refined look to buildings. This feature is especially valued by those prioritizing architectural aesthetics.

Enhanced Photovoltaic Conversion Efficiency: The adoption of a busbar-less design in the panels minimizes potential shading on the panel's surface. Unlike traditional designs that use metal ribbons and can obstruct some sunlight, the busbar-less approach reduces shading, enlarging the effective light-receiving area by approximately 2.5% and thereby elevating the photovoltaic conversion efficiency.

Minimal Glare Impact: The production of solar panels without soldering processes results in a mere 1.7% light reflectance rate, drastically lowering the risk of glare pollution that could negatively impact surrounding areas and residents. This approach prioritizes both performance enhancement and environmental consideration.

Harmonious Fusion of Performance and Design: Maysun Solar’s IBC full black modules represent an ideal amalgamation of high performance and aesthetic elegance. They not only excel in low-light conditions, yielding more energy than conventional panels, but their contemporary design also provides additional aesthetic value to solar installations.

Exceptional Performance in Dim Light: Specifically tailored for regions with low sunlight radiation like Europe, these modules demonstrate remarkable efficiency in dim light settings. Over a winter testing period of 10 days, their energy production was about 20% higher than that of TOPCON modules, showcasing unparalleled cost-effectiveness and delivering superior advantages.

Recommendations

When choosing solar modules for winter or low-light conditions, it's critical to weigh various factors such as performance, cost, aesthetics, and long-term benefits. From our in-depth comparison and testing, here are our suggestions:

1. Optimize Light Absorption: For locations receiving limited sunlight or experiencing frequent overcast conditions, IBC full black modules stand out as the superior choice owing to their exceptional performance in low-light scenarios. These modules excel in capturing light when it's scarce, ensuring higher photovoltaic conversion rates.
2. Focus on Efficiency: The testing underscored the IBC full black modules' superior efficiency, particularly regarding immediate power output and sustained electricity production. Selecting these modules can guarantee efficiency even in suboptimal lighting conditions.
3. Evaluate the Return on Investment: While IBC full black modules might come with a higher upfront cost compared to standard solar solutions, their superior efficiency and durability promise a quicker return on investment and more substantial long-term savings, marking them as a financially sound option.
4. Balance Aesthetics with Functionality: IBC full black modules don't just excel in performance; they also provide a sleek, modern look that can enhance the visual appeal of installation sites. This dual benefit makes them a compelling choice for those seeking both effective and aesthetically pleasing solar energy solutions.
5. Make a Sustainable Decision: Choosing IBC full black modules aligns with a commitment to sustainability. By significantly reducing dependence on fossil fuels and cutting greenhouse gas emissions over their lifespan, these modules contribute meaningfully to the global energy transition.

Conclusion

Maysun Solar's IBC full black modules emerge as a prime selection for those prioritizing top-tier solar solutions without sacrificing design integrity. These modules offer both high efficiency and an attractive design, catering to the contemporary market's emphasis on sustainability coupled with aesthetics. They present an environmentally friendly and visually appealing option for modern structures. Alternatively, for individuals who value an extended warranty period and are flexible regarding design, bifacial glass-glass modules also present a viable option. Though there may be some aesthetic trade-offs, their warranty of up to 30 years guarantees long-term reliability and value. Whether you're drawn to the cutting-edge IBC full black modules or the enduring bifacial options, the market is equipped to satisfy a wide range of needs and preferences.

Reference：

https://www.youtube.com/watch?v=rsHxFM2T_s8

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