Hi, is possible to drive, on the BlueSolar 75/15, the "charger on/off" function, by a fisically jumper or other ways on the gnd/RX/TX/5V port, instead of the VE.direct cable ? Charging my battery bank by solar and alternator, i need to switch of the solar charger to have not conflict in charging tension reading with engine running,i thought by a relay exitated by engine switch that drive the "charger on/off" function, not by softwere but by simply contact on pin. Thanks for help.