The “Energy Storage Inspection 2025” by the Berlin University of Applied Sciences and Technology (HTW Berlin) confirms SAX Power as having the highest efficiency ever measured for energy storage systems to date. Our product from Baden-Württemberg, the first storage system with an integrated inverter function, also outperforms the major Asian manufacturers with this top value.

According to HTW, the SAX system “achieves an average efficiency of 98.0%” and “breaks the 98% barrier for the first time. SAX Power’s device can demonstrate this value at outputs above 900 W”.*

* https://solar.htw-berlin.de/studien/stromspeicher-inspektion-2025/