The size of an alternator will most likely increase the set amperage, too. High output alternators (often found on larger vehicles) can use between
200 to 350 amps
. Smaller cars by comparison, such as a Ford Mustang, will only use about 100 amps with batteries that run at about 12 volts.
How many amps does an alternator charge at?
For a battery being charged by the car's alternator it can take an hour of driving to get it fully charged. Car batteries range from 40AH to 110AH, and alternators range from
45 amps to 200 amps
.
How many amps does alternator produce at idle?
Most late model alternators produce 120 to 155 amps or more. Current output increases with engine speed, from around
20 to 50 amps
at idle up to the unit's maximum output at 2,500 RPM or higher (refer to a service manual for the exact charging output specifications for your vehicle).
What amp should alternator put out?
Most late model alternators produce
120 to 155 amps or more
. Current output increases with engine speed, from around 20 to 50 amps at idle up to the unit's maximum output at 2,500 RPM or higher (refer to a service manual for the exact charging output specifications for your vehicle).
How many amps should a 12 volt alternator put out?
The size of an alternator will most likely increase the set amperage, too. High output alternators (often found on larger vehicles) can use between
200 to 350 amps
. Smaller cars by comparison, such as a Ford Mustang, will only use about 100 amps with batteries that run at about 12 volts.
What should alternator voltage be at idle?
Most alternators that are charging properly should produce a voltage of
about 13.8 to 14.2 volts
at idle with the lights and accessories off. Always refer to the vehicle manufacturer's specifications. Many Asian vehicles, for example, have higher charging voltages of around 15 volts.
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 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.
What size alternator do I need for 3000 watt amp?
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.
Is 14.6 volts too much?
The battery terminal charging voltage must be less than 14.7 volts to prevent excessive gassing. … 14.8 would start to be a worry (there might be liquid or corrosion on the battery) and 15 volts would be a real concern, but
14.6 is fine
. Less than 14.3 would be a “weak” alternator or regulator.
Is 15 volts too high for alternator?
To answer your question, yes,
15 volts is too high
. Most car alternators that charge your battery after every start and provide power while the engine is running are usually regulated to between 13 and 14.0 volts.
Why is my alternator only putting out 12 volts?
– A reading below 12 volts
could indicate insufficient charging, low battery
, or corroded, broken, loose or frayed wires/connections. … – A reading below 13.0 volts could indicate a failed alternator or corroded, broken, loose or frayed wires/connections.
What is a good alternator reading?
A good alternator should produce
about 13.5 to 14.5 volts with the engine idling
. If the voltage reading is low (12.5 volts or less), it indicates a charging problem but does not tell you what's causing it.
Do alternators charge at idle?
The answer is ‘
YES
‘, yes the car battery does charge while the engine is idling. … Then the alternator is producing AC current, thereby charging the battery while your car is idling.
Why is my alternator overcharging my battery?
Improperly jump-
starting the vehicle can send a surge through the battery that destroys one or more cells in the battery
or shorts it out. This surge disrupts the wiring in the alternator, causing an overcharging condition.
How many watts can a 120 amp alternator handle?
thats an average between output surges. Thats just sort of a relative rule of thumb. The other sorta relative rule of thumb is that 10 amps can translate to somewhere in the neighborhood of 100 watts… so a 120 amp alternator could do
1200 watts
.
