KStar unveils battery inverter solution for C&I applications


KStar has launched a new all-in-one energy storage system with an inverter and battery module. It is designed for commercial and industrial (C&I) applications.

The China-based storage and inverter manufacturer said the 5.12 kWh, 512 V batteries feature lithium iron phosphate (LFP) battery cells from CATL. They include two clusters of batteries connected in parallel with 10 modules each in what KStar calls a “1+1 redundancy” design.

“If one battery cluster fails, the other 52.1 kWh battery cluster can still work normally,” KStar said in a statement. “They serve as each other's backup, 1+1 redundancy design ensures the stability of the system operation.”

The system capacity can be expanded to 1 MW/2 MWh, according to KStar. The batteries fits in an outdoor cabinet measuring 1,100 mm x 1,1000 mm x 2,380 mm and weighing 1.5 tons. It comes with IP54 protection and operates in temperatures ranging from -30 C to 50 C. The maximum operating altitude is 4,000 meters, with derating starting at 3,000 meters.

The system reportedly “enables the power generation to restore a stable power grid, optimize the power output curve, reduce solar curtailment, increase the proportion of renewable energy in total power generation, and optimize the energy structure,” the manufacturer said.

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The inverter has 50 kW power output. It has three maximum power point tracking (MPPTs) with an input voltage range of 350 V to 800 V. It has an efficiency rating of 97.5% and the maximum PV input voltage is 1,000 V.

The transformerless inverter measures 650 mm x 715 mm x 325 mm and weighs 75 kg. It comes with IP65 rating and features intelligent air cooling. It operates in temperatures ranging from -25 C to 60 C.

The new solution is pre-installed in factory for easy installation on-site. It features double fire suppression design.

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