If you have a power hungry amp like I do this will do the trick! I have a 250 amp alternator with the big 3 installed hoping it would supply the power I need, Unfortunately it wasn’t enough. My volts would still drop down to 12v. So I decided to pick up this super capacitor and now my volts will not drop more then .2v at idle at full volume. I’m extremely happy with the product a little pricey but worth it.