Cell-to-Module (CTM) Analysis for Photovoltaic Modules with Shingled Solar Cells

Mittag, M.; Zech, Tobias; Wiese, Martin; Blasi, David; Ebert, Matthieu; Wirth, Harry

doi:10.1109/pvsc.2017.8366260

Cited by 34 publications

(35 citation statements)

References 4 publications

(9 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is a number of CTM loss and gain mechanisms (see e.g. [106,107]) and it is interesting to identify those that affect the I SC and those that affect the FF of modules.…”

Section: Shj Solar Modulesmentioning

confidence: 99%

Silicon heterojunction solar cells: Recent technological development and practical aspects - from lab to industry

Haschke

Dupré

Boccard

et al. 2018

Solar Energy Materials and Solar Cells

181

View full text Add to dashboard Cite

We review the recent progress of silicon heterojunction (SHJ) solar cells. Recently, a new efficiency world record for silicon solar cells of 26.7% has been set by Kaneka Corp. using this technology. This was mainly achieved by remarkably increasing the fill-factor (FF) to 84.9%-the highest FF published for a silicon solar cell to date. High FF have for long been a challenge for SHJ technology. We emphasize with the help of simulations the importance of minimised recombination, not only to reach high open-circuit voltages, but also high FF, and discuss the most important loss mechanisms. We review the different cell-to-module loss and gain mechanisms putting focus on those that impact FF. With respect to industrialization of SHJ technology, we discuss the current hindrances and possible solutions, of which many are already present in industry. With the intrinsic bifacial nature of SHJ technology as well as its low temperature coefficient record high energy production per rated power is achievable in many climate regions. 83.8%. This high FF was enabled by a series resistance of only 0.32 Ω cm 2 , demonstrating that very low-resistive contacts can be achieved also with SHJ contacts. Later in 2017, further progress in efficiency was reported, culminating at 26.7% [4]. This cell featured an

show abstract

“…There is a number of CTM loss and gain mechanisms (see e.g. [106,107]) and it is interesting to identify those that affect the I SC and those that affect the FF of modules.…”

Section: Shj Solar Modulesmentioning

confidence: 99%

Silicon heterojunction solar cells: Recent technological development and practical aspects - from lab to industry

Haschke

Dupré

Boccard

et al. 2018

Solar Energy Materials and Solar Cells

181

View full text Add to dashboard Cite

show abstract

“…There are four categories of losses and gains that affect the module efficiency and power, as shown in Table 1: geometrical losses, optical losses, optical gains, and electrical losses. Therefore, a current simulation was performed to maximize the output efficiency and power by optimizing the electrical, mechanical, and optical parameters of the 60-cell module, as shown in Figures 3 and 4 [14][15][16]. [13,16].…”

Section: Ctm Simulation Gain and Loss Mechanismsmentioning

confidence: 99%

Cell-to-Module Simulation Analysis for Optimizing the Efficiency and Power of the Photovoltaic Module

et al. 2022

View full text Add to dashboard Cite

A 60-cell photovoltaic (PV) module was analyzed by optimizing the interconnection parameters of the solar cells to enhance the efficiency and increase the power of the PV module setup. The cell-to-module (CTM) losses and gains varied substantially during the various simulation iterations. Optimization was performed to inspect and augment the gain and loss parameters for the 60-cell PV module. The power and efficiency of the module were improved by refining several parameters, such as number of busbars, size of the contact pads, interconnected ribbon width, thickness of the core, and distance between the solar cells and strings, to obtain the maximum efficiency of 21.09%; the CTM efficiency achieved was 94.19% for the proposed strategy related to the common interconnection setup of the ribbon-based system. The CTM efficiency was improved by optimizing the geometrical, optical, and electrical parameters precisely, the power enhancement was up to 325.3 W, and a CTM power of 99.1% was achieved from a standard PV module with rectangular ribbon interconnections.

show abstract

“…However, in the bonding process, each divided cell overlaps and is bonded, as shown in Figure 2, and the lower divided cell is shaded [16]. Equation (2) was used to calculate the voltage overlap to represent the shading loss of the divided solar cell in the lower part as a voltage source [17]. The modeled divided cells were connected in series to simulate the shading of a shingled string.…”

Section: Shingled Pv Module Circuit Modelingmentioning

confidence: 99%

Simulation-Based Shading Loss Analysis of a Shingled String for High-Density Photovoltaic Modules

et al. 2021

View full text Add to dashboard Cite

Shingled photovoltaic (PV) modules with increased output have attracted growing interest compared to conventional PV modules. However, the area per unit solar cell of shingled PV modules is smaller because these modules are manufactured by dividing and bonding solar cells, which means that shingled PV modules can easily have inferior shading characteristics. Therefore, analysis of the extent to which the shadow affects the output loss is essential, and the circuit needs to be designed accordingly. In this study, the loss resulting from the shading of the shingled string used to manufacture the shingled module was analyzed using simulation. A divided cell was modeled using a double-diode model, and a shingled string was formed by connecting the cell in series. The shading pattern was simulated according to the shading ratio of the vertical and horizontal patterns, and in the case of the shingled string, greater losses occurred in the vertical direction than the horizontal direction. In addition, it was modularized and compared with a conventional PV module and a shingled PV module. The results confirmed that the shingled PV module delivered higher shading output than the conventional PV module in less shade, and the result of the shading characteristic simulation of the shingled PV module was confirmed to be accurate within an error of 1%.

show abstract

Cell-to-Module (CTM) Analysis for Photovoltaic Modules with Shingled Solar Cells

Cited by 34 publications

References 4 publications

Silicon heterojunction solar cells: Recent technological development and practical aspects - from lab to industry

Silicon heterojunction solar cells: Recent technological development and practical aspects - from lab to industry

Cell-to-Module Simulation Analysis for Optimizing the Efficiency and Power of the Photovoltaic Module

Simulation-Based Shading Loss Analysis of a Shingled String for High-Density Photovoltaic Modules

Contact Info

Product

Resources

About