jimmydriver

Is there a digit in my VIN that tells what alternator I have. I'm hoping it is a 100 amp.

dberladyn

I do not know where it is, but there should be a plate or a sticker listing the options. From that you take the codes and see what was factory. However, with you calling it a G Van, I am assuming this is one of the old body styles, which means it's old. It's likely been changed. Maybe they put the same one in or maybe they put a different one in. Electrically it doesn't matter right?

At least not that I am aware of.

jimmydriver

It does matter if your alternator generates 50 amps and you run an inverter that draws 42 amps off of it.

loopedr1

the easiest way to tell is go to Rock Auto and look up your alternator.....in the choices you can look at the pics.....the 100 amp has a different plug on the back than the 50 amp...you can match it against yours....

canucklehead

I have called dealers before and asked for a build sheet for the vin I provide. I used it to compare when shopping for a used truck. It should be on there....

mountainmanjoe

Parts dealers can look up all your alternator options by year and model.

I think you can forget about powering your inverter from the alternator. Alternators are designed to just cover charging the battery and whatever amenities the vehicles has. It won't be making much more than 40-50A at idle, and even less than that will be left over for you. You are going to need a big battery for your inverter.

dberladyn

Current builds are order-able with dual 200 amp (maybe even bigger) alternators. Do not forget these and Silverado's are used for Ambulances, Wreckers, Military and Commercial Purposes. You can even order the option for .. what do they call it, Fast-Idle. I do think you are right though, you want batteries to act as a reservoir, but there's no reason you cannot pump the amperage off the motor.

mountainmanjoe

I believe fast-idle is diesel only, but his '95 wouldn't have that.

I'm thinking you would need a pretty strong motor to run two 200A alternators and maintain idle.

dberladyn

I wouldn't know. I found the dual alternator kit, including belt and bracket, for $350 many months ago. Adding another $300 for another alternator and I figured it just wasn't worth the expense to go this route (for my needs). An option with auxiliary batteries is just to keep them on a separate electrical system altogether, even the charging.

jimmydriver

Interesting video. I've also watched a few videos of people who take the diodes out and connect the alternator to a fan so they can use wind to generate AC electricity. I'd prefer to generate DC so you can use batteries to store the power.