Sungrow promoted its latest utility PV inverter, featuring a split modular architecture, at RE+ 2025
The company displayed its third-generation containerized battery storage system aimed at utility applications in the US
Its booth also featured a liquid-cooled and scalable storage solution for diverse C&I use cases in the US
PV inverter and storage solutions provider Sungrow showcased its latest battery energy storage systems (BESS) for utility and commercial & industrial (C&I) applications, along with a new PV inverter for the US market, at RE+ 2025.
Focused on the US utility market, the company showcased its PV inverter, SG4800UD-MV-US. Among the product’s key features, the company emphasized the modular architecture of the inverter. The system consists of 6 identical inverter sections, each built with a 0.8 MW IGBT power stack in a replaceable modular format. While the design equally distributes the total 4.8 MW capacity across the 6 sections, similar to string inverters, the outputs are combined through a transformer, resembling the architecture of a central inverter. Unlike utility-scale PV string inverters, this design doesn’t require separate AC distribution boxes and cabling, resulting in reduced costs. In addition to the capital cost optimization in balance-of-system (BoS), its modular power stacks can be replaced within 1 hour during breakdowns, minimizing downtime and enhancing operational efficiency compared to a standard central inverter. While PV string inverters of varying capacities use different types of power stacks, Sungrow says its modular inverters on display utilize identical units, making spare parts management easier for operation & maintenance (O&M) teams. However, the company did not quantify these advantages.
Housed in a sealed NEMA 4X-rated protective enclosure, the company states that the product can deliver its full-rated output at operational temperatures of up to 45°C, making it suitable for harsh field conditions in the US. It also features a DC terminal temperature protection function for string-level fault isolation, protecting it against any potential breakdown due to DC overcurrent.
Sungrow states that the product’s PV grid-forming function can establish a local grid of desired voltage and frequency with multiple inverters during the installation phase. In cases where grid supply is unavailable, this feature reduces reliance on diesel generators (DG), helping to cut potential fuel costs and reduce project lead times, ultimately accelerating utility grid-connection, explained the company.
Among BESS products, the company promoted its 20-ft containerized utility-scale storage product – PowerTitan 3.0. Equipped with 661 Ah capacity stacked lithium-iron-phosphate (LFP) cells-based battery units, it can store or discharge up to 6.9 MWh of energy for up to 12,500 cycles. Combining batteries and string-type power conversion systems (PCS) in a single platform, this storage system can deliver power for a duration of 2 to 8 hours, depending on the utility’s diverse needs. Its integrated silicon-carbide (SiC) based PCSs, which debuted with this storage system, are rated for up to 430 kVA. Sungrow shared that it offers a round-trip efficiency (RTE) of up to 93.6% for 4 hours, while its conversion efficiency reaches 99.3%. Alongside ensuring efficacy of the connected batteries, the storage system’s state-of-charge (SOC) balancing function, which spans across 5 levels cell to block, optimizes usable storage capacity. Compared to its predecessor, the company claims these storage systems can lower installation footprint by up to 21% in a back-to-back layout. It adds that all these features contribute to the reduction in levelized cost of storage (LCOS) for a utility-scale project in the US.
Its grid-forming function is based on the company’s technology, which it calls ‘Stem-Cell Grid-Forming Tech 2.0’. Sungrow says this technology enables a proactive response after anticipating grid disturbances before they escalate. It also supports multiple grid ancillary services, such as black start and phase angle jump.
Also on display was Sungrow’s C&I storage system, PowerStack 255CS. Featuring 314 Ah battery cells, it is claimed to deliver up to 257 kWh of stored energy for 2 hours, with an option to expand to up to 6.4 MWh after connecting 26 units in parallel.
This product has versatile C&I use cases, like standalone storage, PV + ESS systems, EV charging, and formation of microgrids.
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