KStar’s new all-in-one energy storage system for commercial and industrial (C&I) applications includes a 5.12 kWh lithium iron phosphate (LFP) battery system and a 50 kW inverter. It contains two battery clusters with 10 modules each and a maximum capacity of 102.4 kWh.
The Chinese storage and inverter maker said the 5.12kWh, 512V batteries feature CATL’s lithium iron phosphate (LFP) battery cells. They contain two battery clusters connected in parallel with 10 modules, which KStar calls “1+1 redundancy”.
“If one battery cluster fails, the other 52.1 kWh battery cluster can still operate normally,” KStar said in a statement. “They act as each other’s backup, the 1+1 redundancy structure ensures the stability of the system’s operation.”
The system capacity can be expanded to 1 MW/2 MWh according to KStar. The batteries fit in an external cabinet, the dimensions of which are 1100 mm x 11000 mm x 2380 mm and weigh 1.5 tons. It has IP54 protection and operates in temperatures from -30 C to 50 C. The maximum operating altitude is 4,000 meters, the reduction starts at 3,000 meters.
The system is said to “help power generation restore a stable power grid, optimize the power curve, reduce solar limitations, increase the share of renewable energy in total electricity production, and optimize the energy structure,” the manufacturer said.
The power of the inverter is 50 kW. It has three maximum power point trackers (MPPT) with an input voltage range of 350 V to 800 V. It has an efficiency of 97.5% and a maximum PV input voltage of 1000 V.
The transformerless inverter measures 650 mm x 715 mm x 325 mm and weighs 75 kg. It has an IP65 rating and intelligent air cooling. It works in temperatures from -25 C to 60 C.
The new solution is pre-installed at the factory to make installation easy on site. It has a double fire extinguishing design.