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Message: <blockquote data-quote="bumpasauras" data-source="post: 8259025" data-attributes="member: 607820">Well what kind of vehicle?? The 2200 is pretty efficient but with 120 amp alt it's pretty marginal you would prolly b ok if you add a couple of batts but if you add a mid/high amp your gonna be drawing too much for that 120a alt to keep up. Reason I asked what vehicle is many times you can buy a stock replacement alt with a higher amp rating from a parts store like autozone for cheap. I have a rodeo that came with a 120a alt but autozone offered a lifetime warranty 180a alt for like 100$ ...you might get lucky and find a similar deal.So your stock alt would prolly run the 2200 but its not gonna run much more than that. So a couple of batts and a 180 amp alt is  your best bet.</blockquote>

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