I have a charge controller for 12v automotive type batteries. It currently limits the charge voltage to 14.4v but I need it to charge at 15.5v as I'm not using standard batteries. The controller has a voltage sense wire that picks up the voltage from the battery. I need to put something in this wire so that I can change the voltage going in the sense wire to trick the controller into giving more voltage.
I am very much a noob at this so any help would be appreciated.
I have read that I can use a diode to increase or decrease the volts by about .7v, but from what I know this depends on the amount of current going through the diode compared to its rated current. The problem it there is no current going through the sense wire of the controller so I cant use this method. Is there a component or circuit that I can built to increase or decrease by up to 2 volts whatever the battery currently is? Something that can be adjusted with a variable resister or something would be even more helpful.
Thanks
I am very much a noob at this so any help would be appreciated.
I have read that I can use a diode to increase or decrease the volts by about .7v, but from what I know this depends on the amount of current going through the diode compared to its rated current. The problem it there is no current going through the sense wire of the controller so I cant use this method. Is there a component or circuit that I can built to increase or decrease by up to 2 volts whatever the battery currently is? Something that can be adjusted with a variable resister or something would be even more helpful.
Thanks