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

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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


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.