JS Alternators builds custom high output alternators from 170 amp to 420 amp.

JS Alternators specializes in high-performance alternators, battery cables, and charging system upgrades for trucks, SUVs, Jeeps, and diesel vehicles. Their products are designed to provide reliable power for demanding electrical accessories, improved charging efficiency, and enhanced vehicle performance. With quality craftsmanship and vehicle-specific solutions, they help drivers maintain dependable electrical systems for both daily driving and off-road adventures.