Sungrow presented its PowerTitan 3.0 AC-coupled storage system and an upcoming DC-coupled solar-plus-storage design
The AC-coupled system combines 1.78 MW of power with 7.14 MWh of capacity and uses 684 Ah cells, with a claimed system RTE of 92%
The upcoming DC-coupled design supports direct charging from PV while reducing separate power conversion, transformer, and cabling requirements
Solar-plus-storage plants use power conversion and energy management equipment to control electricity flows between the PV system, battery, and grid. Surplus solar electricity can charge the battery and be supplied later when demand is higher, or solar generation is unavailable.
Speaking at the TaiyangNews Solar Power Plants & Storage Conference 2026, Savek Dubey, Product Technical Manager at Sungrow India, presented the company’s AC- and DC-coupled storage solutions. He explained how these systems coordinate battery charging, discharging, and grid supply.
Sungrow currently offers the PowerTitan 2.0 and plans to introduce the higher-capacity PowerTitan 3.0 AC-coupled system in India by March 2027. The new system combines 1.78 MW of power with 7.14 MWh of storage capacity in a 4-hour configuration. A 2-hour configuration provides around 3.5 MW, while the platform supports storage durations ranging from 2 to 8 hours.
The container uses 684 Ah stacked battery cells and a fully liquid-cooled silicon carbide (SiC) DC/AC power conversion unit. Sungrow claims a system round-trip efficiency (RTE) of 92%, including auxiliary power consumption under specified 4-hour operating conditions at normal temperature and an output voltage of 690 V. The company specifies a maximum efficiency of 99.3% for the power conversion unit.
The power conversion system (PCS) is integrated into the container. Dubey said this reduces the need for separate equipment and installation space. The compact layout can therefore lower land requirements and simplify installation.
He also outlined the development of Sungrow’s DC-coupled solar-plus-storage architecture. The company’s first-generation solution, introduced in 2017, used an external DC/DC cabinet and a large central inverter. The system had a storage capacity of approximately 1 MWh. The second-generation design moved the DC/DC converter inside Sungrow’s 1+X modular inverter. The upcoming generation will integrate the PV and storage hardware, software, and controls more closely.
In the proposed PowerTitan 3.0 DC-coupled configuration, the PV array and battery container connect to the same modular inverter platform. An integrated DC/DC converter manages the electricity transferred from the PV modules to the battery, allowing the battery to charge directly from solar generation. The DC-coupled version is planned for introduction during 2027.
In the AC-coupled configuration, the battery system requires a separate PCS and transformer. The company says its DC-coupled design can remove this additional equipment and the associated medium-voltage cabling. The PV and storage systems can also use a common grid-connection point.
According to Sungrow, the simpler configuration can reduce equipment, construction, and grid-connection costs. The company estimates savings of more than €2 million for a project combining 100 MW of PV with a 100 MW/400 MWh battery system. This estimate includes savings from the storage PCS, medium-voltage station, cabling, and separate grid-compliance testing.
Sungrow’s Indian portfolio includes central and string inverters for utility-scale projects, along with string inverters for commercial and industrial (C&I) applications. Its storage range covers both utility-scale and C&I systems.
Dubey added that upcoming products include a 500 kW string inverter and the second-generation 1+X modular inverter, with a maximum capacity of 4.8 MW. The company is also developing new C&I string inverters rated up to 125 kW. The upcoming products are intended to meet requirements such as grid-forming operation and black-start capability. A grid-forming system can establish voltage and frequency references. Black-start capability allows a power system to restart without relying on an operating external grid.
On projects, Sungrow highlighted a 250 MW PV plant in Anantapur, India, along with installations in Bangladesh, the US, and Vietnam. The company also presented energy storage projects in India, China, Uzbekistan, Thailand, the US, and the UK. It says more than 62 GWh of PowerTitan systems have been deployed globally. On the floating PV side, the company cited a 320 MW plant in China, a 70 MW project in India, a 58.5 MW plant in Thailand, and a 6.8 MW installation in Israel.
Sungrow has more than 35 GW of inverter manufacturing capacity across two factories in Karnataka. According to the company, it has supplied more than 75 GW of PV inverters and over 640 MWh of energy storage systems in India. It also has a local service team of more than 75 people.
