How long does it take to recharge battery with alternator?
Generally, if you can keep your engine RPM up, your alternator will charge your battery at a faster rate. If you are driving on a motorway, you should be able to charge your car battery in 30 minutes. If you are driving in the city, it may take an hour or more.
Does alternator charge battery while idling?
The answer is ‘YES’, yes the car battery does charge while the engine is idling. As long as the mechanical action of the alternator is taking place; that is, being turned by the engine crankshaft. Then the alternator is producing AC current, thereby charging the battery while your car is idling.
If your alternator can put out 55 amps then, in theory, it will. recharge your flat battery in 45/55 hours or about 49 minutes. In practice it may be limited to somewhat less than that so. perhaps an hour to recharge.
How do you know if your battery or alternator is bad?
If the battery is working, it’s time to take a closer look at the alternator. There are certain signs of a bad alternator to look for: While running the car, take note of the interior lights and how bright these appear. If the dashboard gradually dims, that likely means the alternator is at fault.
How can an alternator be overcharging a battery?
What Causes an Alternator to Overcharge? Battery. Alternators that overcharge will typically produce excess voltage to the battery, making the battery case swell up, become very hot and lose its electrolyte through boiling. Alternator Size and Output. External Regulator. Internal Regulator. Computer Controlled and Temperature Compensated Alternators.
What are the signs of a bad alternator?
The symptoms of a bad alternator include strange noises, similar to a grinding or whining noise and an illuminated warning light. Other less noticeable and less common symptoms include weird sounds and bad smells. A burning rubber smell becomes noticeable when the alternator is going bad because the alternator works with the belt system.