Volts mean nothing in this situation. It'* current that matters. Amps. And I agree.....stock alternator on a 93 is NOT a 140. Can you verify this?

Stock alternator is a 105 unless you have the heated windshield (not available on the SE), in which case you get a 125.

This isnt for the 93, its for the 97 and when i purchased it they said it was 140 amps

When I bought my car, they said it had a flux capacitor behind the rear seat. That explains the food processor mounted to the rear deck, eh? Check your alternator, or take a couple pics of it for us. Even if it is a 140, it could be tired, especially if you had a bad batter weaken it last year.

I believe that Firedevil has a 2 battery setup on a stock 105 alt with no problems. and he is using alot of power

He'* probably running an isolator.

An isolator is when you have a switch, which pics which battery to use, right? Painless wiring makes one.. I think its $100 or something.


-justin

No, quite the opposite. The isolator solves all the problems that switches and relays have. It ISOLATES the batteries from each other.

Another good idea may be to put a regulator on the second battery so it can't draw too much from the charging circuit.

So it.. makes the charging system not see the battery? You've got me, but i'm going to do some googling on this, now that I kinda have something to go on.


-justin

Just in case anyone here is as dumb as me, this is an isolator.


-justin

Then in that case i can put a big enough on/off switch for battery current to flow through and then decide which battery to use if that'* ok