The capacity of the regulator is measured in Watts (Power) and that is the voltage multiplied by the current.
Output of the alternator is controlled by the voltage regulator.
The battery keeps going dead.
On the back of the alternator
It's inside the alternator, most people just replace the alternator if it isn't charging but you can take the alternator apart if you know how and put in a new voltage regulator for about $15.
how will I know my Voltage regulator is bad. I have replaced the starter and had the battery and alternator checked they are good. My car will start when it is colder outside but as the day gets hotter it will not start.. Can you help
To determine if the issue lies with the voltage regulator or the stator, first check the voltage output from the stator using a multimeter. If the stator is producing the correct AC voltage but the battery isn't charging, the voltage regulator may be faulty. Conversely, if the stator is not generating the required voltage, it is likely the stator that is bad. Additionally, visual inspection for signs of damage or overheating can provide clues about which component may be failing.
You will need to go to a repair shop and have them test the charging system.
As far as I know thevoltageregulstor is integral to the alternator.
The only use of an SCR in a powersupply regulator that I know of is a Crowbar protection circuit to force the breaker to pop if the regulation fails and the powersupply output voltage rises too high.
Two things can happen. 1. the voltage regulator fails so that the alternator doesn't know the battery charge is dropping therefore the battery doesn't get charged. 2. The voltage regulator fails in such a way as to allow the alternator to overcharge the battery which causes the battery to overheat and fail, Sometimes an overcharged battery can explode.
To determine if the voltage regulator on a 2007 Dodge Durango is bad, check for inconsistent voltage readings using a multimeter. If the voltage fluctuates significantly or is consistently below 13.5 volts while the engine is running, the regulator may be faulty. Additionally, look for symptoms like dimming lights, electrical issues, or a warning light on the dashboard, which can also indicate a problem with the voltage regulator. If these signs are present, further testing or replacement may be necessary.
Check voltage at the battery with car running, it should be well over 12 volts, also check alternator output.