The Sinovoltaics Energy Storage Manufacturer Ranking Report Edition 3, 2025, presents a detailed analysis of the financial stability of energy storage manufacturers globally, using Altman Z-Scores as a key metric. These scores were calculated from September 2022 to June 2025 and aim to assist purchasers in assessing the financial soundness of manufacturers, especially in an emerging energy storage market where warranties can span 2 to 10 years and the financial viability of companies plays a crucial role in the enforceability of those warranties.
The energy storage market is still evolving, and many manufacturers are new entrants. This makes it difficult for buyers to select the right partner. The report emphasizes that, in such a dynamic environment, many of today’s manufacturers may not be in business in five years. However, from a short to medium-term perspective, choosing a financially strong company ensures the reliability of warranty and product support. The report anticipates future challenges in solar PV and energy storage projects where clients may struggle to find responsible parties for battery performance complaints or replacements after several years of operation.
The ranking report includes more than 50 companies from around the world. They are categorized into three main zones based on their Altman Z-Scores: Safe Zone, Grey Zone, and Distress Zone. This classification offers a quick overview of each company’s financial health.
The report highlights that while companies in the Safe Zone are the most stable, some companies in the Grey Zone have demonstrated consistent performance over several years. For example, CAMEL GROUP had a score of 3.27 in Q3 2022, 3.57 in Q1 2023, 3.21 in Q2 2024, and 3.19 in Q3 2024. Despite being in the Grey Zone, the stable performance makes it one of the solid manufacturers on the list. Similarly, SEBANG GLOBAL BATTERY and ZHONGTIAN TECHNOLOGY showed stable and even improving Altman Z-Scores over the period. SEBANG’s score rose from 3.00 in Q3 2022 to 3.79 in Q2 2024, though it dropped slightly to 3.39 in Q3 2024. ZHONGTIAN showed scores from 4.32 in Q3 2022 to 3.36 in Q3 2024, still reflecting stability.
The report also introduces Sinovoltaics’ EL Mass Analysis (SELMA), an AI-driven electroluminescence testing software that helps detect and eliminate micro-cracks and other cell-inherent defects in solar modules. This solution offers high-speed, high-accuracy inspection of all modules—up to 99.9% accuracy—avoiding sampling errors and enabling rapid on-the-fly analysis to match factory production speeds. SELMA can identify and classify up to 15 types of cell-inherent defects, helping companies replace faulty PV modules before shipment.
Sinovoltaics further offers laboratory testing services tailored to country and climate-specific requirements. Their ZERO RISK SOLAR & BESS services span across Asia, with over 350 factories audited, 25+ GWp worth of solar and BESS projects, and more than 15 years of experience in the field. Overall, the report serves as a vital guide for project developers, EPCs, and investors looking to mitigate financial and operational risks in the energy storage sector by selecting manufacturers with proven financial stability.
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