I just set up my system for the first time in my JDM rv and everything works / comes on except for the alternator light... I don't have the panels hooked up yet but to the best of my knowledge I can and should do that last ( or at least after the battery) the battery light comes on and the inverter works fine ( I have wills 400 watt w alternator set up almost exactly but with a 2000w inverter and proper breakers/ wires for that) I have a 4 gauge wire running from a 70 amp breaker down to my battery about 4 feet and hooked directly to the positive lead... not sure what the issue might be but would love some help