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Quality Assessments Of BESS Systems A meta-analysis of quality audits of 320+ BESS units in five countries reveals that when compared to cell- or module-level defects, system-level defects are the most likely to lead to high-severity failures and are the most common type of quality risks in BESS systems accounting 72% of quality issues.
Outer rings in the diagram indicate individual categories of the main risks. System defects from improper integration procedures account for the majority of system-level quality issues.
Cell defects (15%)
Granular Categorization of Quality Risks
Module defects (13%) System defects (72%)
Source: Clean Energy Report [Note: Report used data up to December 2023 Figures shown in slide were reproduced using data provided by authors, which takes into account compiled quality audit data until November 2024.]
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