Electricity and Control September 2025

Renewable energy + industrial sustainability: Products + services

High efficiency storage with long-term reliability Trina Storage has released independently verified operational data from a 150 MW utility-scale agrivoltaic and storage project, confirming strong performance in e•iciency and long-term reliability. The project, part of a solar + storage hybrid renewable energy installation, has been in continuous operation for over a year. Performance evaluation was conducted by UL Solutions and the China Quality Certification Centre (CQC), two globally recognised third-party authorities. Testing results show the system consistently achieved 95.2% dc-side e•iciency and 87.1% system-level round trip e•iciency, placing it among the most e•icient large-scale energy storage systems currently in operation. “We are proud to see our technology delivering real value under field conditions,” said Shawn Deng, Head of Global Product & System Integration at Trina Storage. “From cell-to-ac capability to third party validation, our goal is to build trust through performance. We will continue working with global partners to test next-generation systems in diverse environments and provide transparent, data driven benchmarks for the industry.” Integrated e iciency from cell to grid The project is powered by Trina Storage’s Elementa Series, a smart, flexible energy storage solution built with Trina Storage’s proprietary in-house battery cells. Designed for flexibility and scalability, Elementa delivers high e•iciency, safety, and long-term reliability by optimising performance across the system – from cell to grid. Key system features include a smart thermal management system, which keeps cell temperature variation within 3°C, and Stackable energy storage system TESVOLT, a leading European full-service provider of innovative energy storage system solutions for commerce and industry, introduced its new battery storage solution TESVOLT TAYTAN to the market earlier this year. The system consists of battery modules that simply plug into each other – with no external cables. Between three and ten modules can be stacked, depending on the required storage capacity – serving the needs of smaller commercial operations. The battery modules for the new energy storage system are manufactured by TESVOLT in its new gigafactory in Wittenberg, Germany. The battery system is designed to work with di•erent inverters, and built-in Infineon chips protect it against cyberattacks. A 12-year performance guarantee ensures investment security. Produced in Germany “Although the new storage system is produced in Germany, the pricing is in the same ballpark as comparable Chinese storage systems. We can do this because our new gigafactory in Wittenberg enables high volume production with the sophisticated manufacturing processes we have developed,” says Simon Schandert, CTO and Co-founder of TESVOLT AG. “One major advantage we have over Chinese storage system providers is that we o•er on-site service and we have all the spare parts on hand in our Wittenberg facility. We do not leave our specialist partners hanging when problems arise.” Cyber protection incorporated “These days it is particularly important that battery storage systems are safe from cyberattacks. Batteries are considered critical

auxiliary power consumption as low as 1.8%. Together, these capabilities reduce energy loss by around 30% compared to conventional systems and contribute an estimated 200 000 kWh of additional electricity annually, boosting overall output and returns. Strong economic performance A‘er more than a year in operation, the system retains 98% of usable capacity, indicating minimal degradation and strong cycle performance. This long term reliability supports a 15 to 20% reduction in Levelised Cost of Storage (LCOS) compared to industry averages, supporting project bankability. With its high e•iciency and stable performance, the system enables participation in multiple market applications, including energy arbitrage, frequency regulation, and reserve services, helping operators diversify revenue streams and shorten investment payback periods.

The 150 MW agrivoltaic + storage project powered by Trina Storage’s Elementa Series.

infrastructure, but the risk of battery systems being switched o• remotely, or third parties gaining access to sensitive data is real in the current geopolitical context,” says Daniel Hannemann, CEO and Co-founder of TESVOLT. “That’s why we use Infineon chips, which o•er the highest security against cyberattacks available.” Modularity provides scalability Each battery module has a storage capacity of 6.25 kWh. The TESVOLT TAYTAN starts at three modules, which equates to a total capacity of 18.75 kWh. A maximum of 10 modules can be stacked on top of each other, which means the new storage system can reach a total capacity of 62.5 kWh. Up to four battery storage systems can be operated in parallel via an inverter. A further advantage is that the new battery storage system doesn’t require an active cooling system. The battery modules release their heat to the metal casing, so they are cooled by the ambient temperature. The TESVOLT TAYTAN can also be operated without an active heating system. The storage system can be operated at ambient temperatures of -20 to 50°C and is suitable for outdoor use.

The TESVOLT TAYTAN new battery storage solution allows for up to 10 x 6.25 kWh modules to be stacked.

SEPTEMBER 2025 Electricity + Control

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