FAQ: What Is The Minimum Amp Alternator I Can Use On My Gm Motorhome?

How many amps is a GM alternator?

Most factory alternators are rated at 65 to 100 amps and are capable of handling your vehicle’s basic necessities, such as headlights, gauges, fuel pumps, A/C, etc.

How do I know what amp my GM alternator is?

The amperage rating is found on the ID tag, and can be referenced by using the AC Delco part number. For example, the Delco part number “321-39” identifies a model 10SI with a 63 amp rating. Always use the AC Delco part number when referencing the alternator, or dealing with a parts or service department.

What amp alternator do I need?

The amp rating of the alternator is matched to the vehicle’s electrical system. Older vehicles with fewer accessories may only need a 70- or 80-amp alternator, while a newer vehicle with lots of electronics and accessories may need a 120- to 160-amp alternator.

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How much HP does it take to run a 100 amp alternator?

An alternator takes about 1 HP for every 25 Amps of power. At full output, a 100 Amp alternator will need about 4 HP.

Is a 160 amp alternator good?

The high amp alternator will give you more replacement juice if you are running any high amp load appliances. The 160 amp is known to be used on emergency vehicles that are at a standstill and still running lots of 12v power thru said appliances.

How does a GM 3 wire alternator work?

The three wire types in a three-wire alternator include the battery positive wire, the voltage sensing wire, and the ignition input wire. The battery positive wire connects to the starter. The voltage sensing wire connects to the battery, and the ignition wire connects from the alternator to the key switch.

What amp is a DR44G alternator?

145 AMP Generator Assembly, Alternator (DR44G) Factory Part Nos.

What are the two wires on a GM alternator?

Yup, you betcha, the white wire goes to the accessory side of the ignition switch, the red is the voltage regulator sensor, can be wired to the bat wire, but is better run to the power terminal of the fusebox, it’ll tell the alternator more accurately how much current to put out.

What year did GM start using alternators?

Dubbed the 10 DN, the externally regulated Delcotron was GM’s new charger of choice through 1968, when the internally regulated alternator was introduced. In operation, alternators and generators do the same job, they convert mechanical energy into electricity to keep the battery charged.

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How big of an alternator do I need for 3000 watts?

3000 watt / 12V is equal to 250A. A 250A alternator is needed to keep up with it. Since your engine would have to work just as hard as any portable 3KW generator to keep up with the amplifier, you would need a large fuel tank.

How big of an alternator do I need for 1000 watts?

As a general rule, you need about 100 amps of current for every 1000 watts of power generated. Add that to the base electrical requirements of your vehicle for the total amount of amp-hours you need for your system. Example: You plan to install a 2,000 watt amplifier.

How do I match my alternator to my battery?

Your alternator should be capable of delivering rated output equal to the maximum acceptance rate of your house battery bank. In other words, the alternator’s rating should be equal to 25 percent (lead acid) 30 percent (gel) or 45 percent (AGM) of your total battery capacity.

Can a alternator add horsepower?

In addition, says Basner. “ On some applications, a high-amp alternator can actually add horsepower to your engine’s performance.” Sure, it’s nominal, but, when it comes to horsepower, every bit helps. “Most alternators are only about 75 percent efficient.”

What is the minimum RPM of a 12v car alternator?

Typically, the lowest speed at which a car alternator is able to generate 12VDC is about 1,800 RPM.

What RPM does an alternator run at?

An alternator has a normal range of operation. Most alternators need to spin at about 2,400 rpm at idle, have their maximum output above 6,000 rpm, and should never exceed 18,000 rpm.

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