Wiring it down will cause more strain on your voltage, so you need to make sure you have the voltage to accommodate the extra strain.What do u mean by v
Voltage, you will need to keep your voltage up. Ideally 14volts but realistically if you can keep your voltage up above 12.5 you should be good. How you keep your voltage up is by adding extra batts, multiple runs of power and ground wire, high output alt. I am not saying you need all of this, you will just have to test it out and see....If u mean volts how many do I need??