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How Much Volts Should An Alternator Put Out

If you’re like most homeowners, you probably think of your alternator as a backup power source. You can count on it when the lights go out and you need to crank up the oven to thaw out some turkey. But did you know that an alternator can also be used to power various appliances in your home? In fact, if your appliances require more than 12 volts, your alternator is likely able to provide that juice. And if you’re not sure how much voltage your appliances require, don’t worry—most appliance manufacturers provide this information on the product packaging. So next time you’re shopping for an Alternator, take a look at the volt requirements for all of your appliances and select the one that will provide the most power for your needs.

What is an Alternator?

An alternator is a device that converts electricity produced by a battery into direct current (DC) for use in an electrical system. Alternators are used to power automotive vehicles, machinery, and other applications. The most common type of alternator is the serpentine belt alternator.

How Does an Alternator Work?

An alternator is a device that converts mechanical energy into electrical energy. When a car’s engine is started, the engine’s rotational motion creates a small current of electricity in the battery. This current is then amplified by the alternator, which turns it into a large enough current to provide power to your lights and accessories. Alternators come in two types: belt-driven and direct-drive. Belt-driven alternators use a rubber or metal belt to transfer power from the engine to an electric motor. Direct-drive alternators have an electric motor built inside the stator, which directly powers your lights and accessories. Each type has its own advantages and disadvantages. Direct-drive Alternators are more compact and can handle higher loads than belt-driven alternators, but they’re also more expensive. Belt-driven Alternators are cheaper to purchase and maintain, but they can’t handle as high of loads as direct-drive alternators can.

What are the Different Types of Alternators?

There are three main types of alternators: belt, crankshaft and direct-drive. Here’s a closer look at each type.

Belt Alternators: Belt alternators work with a rotating pulley to generate electricity. They’re the most common type and are typically used in small engines like fan motors and garage door openers. Because they use a belt, belt alternators are low-maintenance and can be damaged by ice, salt or dirt buildup. Belt alternators typically output between 12 and 24 volts.

Crankshaft Alternators: Crankshaft alternators work with an electric motor to generate power. They’re usually found in larger appliances like washers and dryers and in vehicles like cars, trucks and boats. Because they have a crank shaft, crankshaft alternators are more powerful than belt alternators but also more expensive due to their higher output voltage (typically 24 volts).

Direct-Drive Alternators: Direct-drive alternators use an electric motor to generate power directly without the need for a rotating pulley. They’re typically used in larger appliances where efficiency is key (like air conditioners) or in vehicles where high power is needed (like hybrid cars). Direct-drive alternators are the most efficient type ofAlternator but also the most expensive due to their high output voltage (usually 36 volts).

What are the Voltage Ratings of Alternators?

The voltage ratings of alternators are typically between 100 and 240 volts. The higher the voltage, the more power the alternator can generate.

How to Determine the Need for an Alternator in Your Vehicle

When your car dies in the middle of nowhere, you can thank the alternator. Your Alternator provides power to running accessories like your headlights and taillights. How much volts an alternator puts out depends on the make and model of your vehicle. In general, a 2007 Nissan Maxima requires a 160-volt alternator, while a 2005 Audi A4 needs only a 130-volt alternator. If you’re not sure what voltage your vehicle requires, consult your owner’s manual or look for a sticker inside your car.


If you’re in the market for an alternator, knowing how much volts it should put out is a key factor to consider. Alternators come in different ratings, and each one needs to be connected to a certain voltage source in order to work properly. Make sure that you have the correct voltage before making your purchase so that you don’t end up spending money on something that won’t work with your vehicle.