I agree you probably have the remote wire connected to a constant 12v keeping the amp on at all times. When you are driving with the lights on at night and the system cranked do the lights flicker at all. If they do then you DEFINATELY need to get a cap as that IS draining your battery faster than your alt. can recharge it. I have never had, never installed, never recommended, never will install a system without at least a 1 farad cap. and anyone who does better have a good bit of money to keep buying batteries and charging them and buying more powerful alts.