Fox ESS Achieves HTW 2025 A-Class Certification for Energy Storage Systems
Fox ESS, a global provider of energy storage solutions, has reached a significant milestone in 2025: its hybrid inverter and ECS storage system has been awarded the A-Class certification by HTW Berlin in the renowned Energy Storage Inspection 2025.
HTW Berlin Energy Storage Inspection
The annual inspection by HTW Berlin is one of the most respected performance benchmarks for residential PV and storage systems in Europe. Systems are tested under standardized conditions for:
- System Performance Index (SPI)
- Efficiency in charging and discharging
- Real-world economic value for households
Fox ESS Results
In the 2025 round of tests, Fox ESS’s H3 hybrid inverter + ECS system achieved an impressive 94.8% SPI in the 10 kW household category. This places the system firmly in the A-Class, signifying high efficiency and outstanding performance for residential use.
Significance for the Market
This certification provides homeowners, installers, and partners with clear validation of Fox ESS technology:
- High efficiency reduces energy losses and boosts self-consumption.
- Certified reliability enhances bankability and customer trust.
- A-Class recognition strengthens Fox ESS’s competitive positioning in the European market.
Conclusion
With the HTW 2025 A-Class certification, Fox ESS demonstrates its capability to deliver best-in-class energy storage solutions for households. This achievement underscores the company’s commitment to efficiency, innovation, and support of Europe’s clean energy transition.
Reference: Fox ESS – HTW 2025 A-Klasse Zertifizierung
