Sungrow’s PowerTitan 3.0 BESS is equipped with a liquid-cooled PCS
The PCS has a conversion efficiency of up to 99.3%
The system’s RTE can reach 92%
Sungrow, a PV inverter and solar plus storage system provider, has been named as a finalist for its PowerTitan 3.0 battery energy storage system (BESS) for The smarter E AWARD 2026 in the ‘Energy Storage’ category.
This product, equipped with more than 600 Ah stacked battery cells, boasts a storage capacity of up to 7.14 MWh within a 20-foot container. It can deliver up to 1.78 MW 3-phase power (AC) via a built-in power conversion system (PCS) in an AC-coupled configuration with grid supply at full load. According to the company, this PCS or bidirectional (charging/discharging) inverter features Silicon Carbide (SiC) based power devices with a higher switching frequency than conventional IGBT-based counterparts. It exhibits lower conduction losses during conversion processes. In addition, the periphery of these switching devices is cooled by a circulating liquid coolant. Together, these attributes result in a maximum PCS conversion efficiency of 99.3%.
According to the company, these low conversion losses contribute to additional discharge energy, reaching a round-trip efficiency (RTE) of 92%. It features an automatic battery State-of-Charge (SoC) calibration that spans 5 levels, achieving up to 8% additional discharge energy throughout the system’s operational lifetime.
From an operational perspective, it can form its own voltage and frequency in the absence of the grid source and contribute to grid ancillary services. This helps form frequency and voltage at the individual plant level, rather than following the regional grid. It enables fast switching for power electronics components without any rotational mass-based inertia support, typically common in thermal power plant-based grids. This attribute provides synthetic inertia that injects – or absorbs – active power to the grid in proportion to the rate of change of grid frequency and stabilizes an unstable grid. This storage system also injects or absorbs reactive power during undervoltage and overvoltage grid conditions, respectively, by leveraging its voltage source function. Following a regional power grid blackout, grid operators look for self-starting power sources (hydropower, battery storage, etc.) to resynchronize and stabilize the grid or black-start, which this grid-forming BESS can help achieve.