In my 96 Camry 4cyl 2.2l 5sfe I have 2 amps, 6 6x9s, 2 10" subs, 2 15" subs, 2 6" Door Speakers, a 800 watt power inverter, a pioneer 7" display hu, 2 tweeters, 2 extra 9" displays, a ps3, and some more little interior LEDs and stuff. My problem is after about 20 min of idling my inverter faults out due to lack of power. If I keep the engine reved it is fine but if not my subs don't hit as hard also. Do I need to run 2 batteries or can I get a bigger Alternator

 

The alternator does not put out full power until engine RPM is around 2000.

The amp and other electrical items may be drawing more power then the alt is generating when the engine is at idle. The battery makes up the difference until it becomes drained. Once this happens the amp is going to short on power.

There are modified higher output alt's for this year of car and engine such as the one at the site below:

Toyota Camry High Output Alternators

You might contact any vendors who products interest you and state your situation to make sure the alt puts out enough power when the engine is at idle. Remember the alt only puts out max power when the engine RPM is around 2000.

Adding large capacitors to the amps DC power supply may ease some of the issues of base notes not hitting hard. This is common, an internet search will turn up posts on this subject.

Adding another battery will help extend the time before the amp problem starts up but given the alt is not putting out max power at idle both batteries will start to run down sooner or later. More amps are being drawn from the battery then being replaced by the alt when the engine is at idle.

 

Thanks for the info and the link.

 

does it hurt your alternator at all no dimming lights? i mean i heard that it wouldnt be able to stand 500 watts on 2 12s sp how would i be able to put 800 watt amp on two 12s in the trunk without damaging the car