Unlike a generator, which produces direct current (DC) power, an alternator generates alternating current (AC) power, which is converted to DC for use in the vehicle's systems.

In principle, any AC electrical generator can be called an alternator, but usually, the term refers to small rotating machines driven by automotive and other internal combustion engines. An …

Find an alternator that fits your car and delivers the same performance as original equipment, or better. We carry long lasting replacements, like Duralast Gold alternators that come with a …

Mar 4, 2025 · Learn how your car's alternator powers electrical components and charges the battery. Discover how it works, signs of a bad alternator, and when to get service.

If it's time for an alternator replacement, NAPA Auto Parts carries a vast supply of alternator repair kits, condensers, bracket clamps and even rectifiers and brushes for all your alternator repair …

Online shopping for Alternators - Alternators & Generators from a great selection at Automotive Store.

Your alternator is a vital part of your vehicle's electrical system. Mounted onto a car or truck’s engine, it converts your vehicle's mechanical energy into electrical energy.

Dec 15, 2025 · Learn how to diagnose a failing alternator and replace it safely with U.S.-specific tips, tools, costs, and common mistakes to avoid. The alternator is the heart of your vehicle’s …

Jan 10, 2024 · An alternator is a generator that produces electricity to power your car’s electrical systems. When your engine runs, it spins a pulley on the alternator, creating an electrical …

Feb 24, 2025 · Here's how to tell if your car needs a new alternator and how to install one yourself. If your car or truck won't hold a charge, you probably need a new alternator. Learn …