My digital out will tick like a time bomb and if I mute my system at full volume with a 500 wattish amp it will tick off when unmuted with no battery hooked up. Also I have yet seen an alternator that did not need a battery inline with it if for no other reasons than not destroying the diodes.Not true. If you were actually concerned with filtering the ripple the alternator put out, you would add a cap in parallel and not a battery. An alternator by itself will create a very stable electrical system if the devices are operated within its limits.