Hi, I have an accumulator (battery bank of 300 V DC) and have a pre-charge resistor connected in series to it. I would like somebody to suggest me a circuit that will enable the 300 V Supply charge the DC Link (350 farad) through pre-charge resistor upon a 12 V Input to the circuit. And after 3-4 seconds (by the time DC Link reaches 90% SOC) it can open the relay to which the pre-charge resistor is connected thereby disabling that path and also send a signal to activate isolation relay to have direct current flowing from 300 V path (the path without the pre-charge resistor). Turning ON and OFF of the inverter happens frequently while testing. A discharge circuit to dissipate the energy in DC Link whenever 12 V is turned OFF would also be helpful.