sr20 charging difficulties

[wasa240coupe]

I have been having trouble with the charging system in my sr20det redtop.
for some reason my battery will not keep a charge while driving. It will start up no problem but it is just running straight off the battery and will slowly loose it's charge. I have tried using three different alternators and that hasn't worked. i tried many different batteries and that hasn't worked either. Today i swapped out the charging harness and replaced that and i am still have the same problem. So if any body has any suggestions or knows what the problem is please let me know. thanks

[prymer 240]

do u have alot of electronic accesories in ur car?? like a million watt amp??? cuzif u do, ther drain more juice from the batt then the alternator can charge

[Eternal_240Sx]

did you just get the swap in? if so it may be a wiring issue.