The smart alternator system allows the vehicle to control the output voltage from the alternator based on vehicle operating conditions to reduce electrical load and in turn mechanical load on the engine by the alternator, this renders it unsuccessful at charging a secondary battery system to a usable level..
Considering this, how do I know if my alternator is smart?
Start the engine, ensuring any fans, radio, lights etc. are turned off. If your readings are around 14.4V DC then then you most likely have the traditional, non-smart alternator. If your reading is closer to 12.5-13.5V then it's likely that you have a smart alternator.
Beside above, what should a 12v alternator charge at? A car alternator needs to be putting out at least 13-14 volts (ideally between 13.8 and 14.2 volts) to effectively charge a 12 volt car battery. If the alternator is putting out too much voltage (15+ volts), it is likely your battery acid will boil over out of the battery.
Also to know is, what are smart alternators?
The smart alternator system, also known as variable voltage alternators, allow the vehicle to control the output voltage and current from the alternator based on vehicle operating conditions. The idea behind this is to reduce electrical load and in turn mechanical load on the engine by the alternator.
What is the charge rate of an alternator?
A: Charging time depends on the battery and the charger. 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.
Related Question Answers
Will dual batteries hurt my alternator?
You should not incur any issues using a secondary battery with a battery isolator. It will not cause any damage to your alternator. For your edification, it won't be using wasted energy, but your engine will probably using a tad more gas to operate the alternator, which will have to do more work.How do I find out what my alternator is?
Look for the number on the alternator. If you can't see the entire number, remove the adjustable bracket with a wrench. Take off the alternator and find the part number on it. Once you have the number, you have the identification of your alternator.What does BCDC stand for?
Bay Conservation and Development Commission
What is a battery to battery charger?
Battery-To-Battery chargers (also commonly know as DC-DC chargers) allow you to charge an auxiliary / leisure battery from your alternator whilst driving. This provides a 100% re-charge for your leisure battery in a controlled way and typically achieves it faster than with direct alternator charging.How does a smart battery charger work?
Smart chargers will detect voltage and resistance from the battery prior to charging. After reading the battery the charger determines which stage to properly charge at. Once the battery has reached 80%* state of charge, the charger will enter the absorption stage.How do alternators charge batteries?
The battery is charged by an alternator on modern cars, or by a dynamo on earlier ones. Both are types of generator , and are driven by a belt from the engine . The alternator consists of a stator - a stationary set of wire coil windings, inside which a rotor revolves.Does bt50 have a smart alternator?
MAZDA BT50 current model. Is also equipped with smart alternator but function is not activated.What is a temperature compensating alternator?
The Temperature Compensating Alternator will charge at approximately 14V when the engine is cold, and decreases to as low as 13.2V when the engine reaches operating temperature. These alternators vary output based on driving conditions at the time. The range of voltage can be between 12.3V and 15V.Can you use different alternators?
so the only problem with putting a different alternator on would be the purpose of the terminals on a different alternator, as well as their size and design. also pulley type, but that could be fixed by finding an appropriate diameter pulley of the right type, which shouldn't be to difficult.Can you run two batteries one alternator?
A car alternator will be more than capable of charging two batteries. However you need to be more careful about connecting two batteries together if one is charged and the other is not.Does the ECU control the alternator?
An alternator works together with the battery to supply power for the electrical components of the vehicle. These systems are controlled by the vehicle Engine Control Unit (ECU). As the vehicle demands more load the ECU sends a signal to the alternator requesting it to start charging.Can dead battery kill alternator?
A Dead Battery. In other words, a bad alternator can get your attention by killing your car's battery, even if the battery wasn't the problem to begin with. Diagnosing a dead battery versus a dead alternator is relatively easy. Simply jump-start your car and then remove the jumper cables as quickly as possible.Does the PCM control the alternator?
the alternator casing (Chrysler alternators do not use an internal regulator). controlled. A pulse width modulated signal generated by the PCM, is used to switch the current to the rotor's field coils on and off. As the alternator duty cycle changes, so does the alternator's output.What does a BCDC charger do?
The REDARC BCDC1220 is a 12 Volt 20 Amp In-vehicle DC to DC battery charger designed to keep your battery charged whilst driving. The BCDC charger will work from a wide operating range (9 – 32V) giving the option of charging from both 12V and 24V vehicle systems.Does alternator fully charge battery?
Alternator manufacturers know the same things about alternators that we do- they are designed to maintain batteries that are near a full state of charge, not recharge deeply-discharged batteries. However, when jumper cables are needed, be sure to get the battery fully-charged with a battery charger as soon as possible.What does Smart Charging mean?
Smart charging is a form of electric vehicle charging in which the time and rate at which an EV's battery pack is charged can be controlled in a more "intelligent" way than the simple use of a manual on/off switch.How do you check an alternator with a screwdriver?
Test the alternator for magnetism. Use a metal screwdriver and place the metal end very near the bolt on the alternator pulley. It's on the front of the alternator and the alternator belt goes round the pulley. The end of the screwdriver is not drawn towards the bolt as there isn't any electrical magnetism.Is 15 volts too high?
So, to answer your question, Yes, 15 volts is too high. A regulated charger will hold the voltage to 13.5 to 13.8 volts once the voltage has peaked, to prevent gassing and overcharging, and the current will drop to almost zero in a healthy battery.How do you test an alternator output?
To check an alternator, pop your vehicle's hood and hook up a voltmeter to the car's battery by connecting the red lead to the positive terminal and the black lead to the negative terminal. Make sure the voltmeter reads at least 12.2 volts, then start your car and rev the engine to 2,000 RPM. 
