The Sungrow PowerKeeper STC12.5 is a high-performance, active air-cooled lithium iron phosphate (LFP) battery module engineered for scalable commercial and industrial energy storage. Featuring advanced 5D alert monitoring, triple-guard protection, and integrated fire suppression, it delivers exceptional safety and peace of mind through PowerKeeper's comprehensive cell-to-plant safety architecture.

The STC12.5 serves as the building block of the Sungrow PowerKeeper HV Battery System, providing reliable, safe, and efficient energy storage within a modular architecture derived from the proven DNA of Sungrow's SBH battery series. Designed for future expansion, the ST series supports Sungrow's SpaceMax layout capabilities (up to 1MWh), enabling seamless back-to-back installation for optimised footprint and flexible system design.

✅ Key Benefits

• Scalable High-Capacity Design – Each tower (ST050CF) consists of 4 × STC12.5 modules, delivering 49.9kWh of nominal storage, with the ability to connect up to 5 towers (249.6kWh total).
• Future-Ready Expansion – With the upcoming DC combiner box (late 2026), systems can scale up to 998.4kWh on a single inverter.
• Advanced LFP Safety Technology – Stable lithium iron phosphate chemistry with integrated smoke detection, pack-level thermal protection, and explosion relief valves.
• High Power Performance – Supports 162.5A nominal charge/discharge (0.5C) for peak shaving and backup.
• Modular & Installer-Friendly – Stackable design simplifies transport and allows seamless future expansion.
• Seamless System Integration – Requires 1 × Main Kit + 1 × Expansion Kit per additional tower. Minimum 5 towers for full backup.
• Built for Harsh Environments – IP66 with C5 corrosion protection, withstands submersion up to 50cm for 24 hours.

Specifications

Warranty & Compliance

10-Year standard warranty • CEC approved as a Pre-assembled Battery System (BS)