Battery Charging And Discharging Panel: Supply And Commissioning Of Digital Signal Processing (Dsp) Controlled Igbt Based Ac To Dc Rectification (Converter) With Active Power Factor Correction With Fine Control On Voltage Regulation, Ripple, Thd And Improved Efficiency With Re Generative Feature Suitable To Provide Float Charging And Boost Charging Of Ni Cd Batteries Of 199 Ah/110 V Capacity & Lead Acid Batteries Of 75 Ah/110 V Capacity As Per Els/Kzj Specification No. C/E/Els/Kzj/Spec/06.