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  #13  
Old 12-17-2015, 11:11 AM
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Re: Question on voltage.

Just fyi the volt reading is the charge voltage and not battery voltage. It tells you how much voltage the charging system is putting out.

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  #14  
Old 12-17-2015, 01:48 PM
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Re: Question on voltage.

Quote:
Originally Posted by peckmv View Post
Just fyi the volt reading is the charge voltage and not battery voltage. It tells you how much voltage the charging system is putting out.
More or less, what it is reading is not the open circuit voltage of the battery itself.
Don't sweat voltages up to about 15. If you see 16 much, you might want to get your electrical charging system and battery checked as that is a bit of an overcharge.

Open circuit a 12 volt battery fully charged is 12.6 or 12.72 volts. To charge one
usually takes about 13.2 volts more or less.

Reasonably good article:

https://en.wikipedia.org/wiki/Automotive_battery
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Old 12-17-2015, 07:13 PM
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Re: Question on voltage.

Thanks you two
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  #16  
Old 12-24-2015, 06:25 PM
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Re: Question on voltage.

Quote:
Originally Posted by lstowell View Post
More or less, what it is reading is not the open circuit voltage of the battery itself.
Don't sweat voltages up to about 15. If you see 16 much, you might want to get your electrical charging system and battery checked as that is a bit of an overcharge.

Open circuit a 12 volt battery fully charged is 12.6 or 12.72 volts. To charge one
usually takes about 13.2 volts more or less.

Reasonably good article:

https://en.wikipedia.org/wiki/Automotive_battery
The voltmeter reading on mine fluctuates from 14-15 volts. At idle or on freeway, still the same.
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Old 12-25-2015, 11:32 AM
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Re: Question on voltage.

It also depends on where the sensor is. I usually see about 1/2 less on the ALDL than can measure at the battery.

Ideally you want a running voltage in the 13's. Over or under and I would want to know why.

Just bought one of these & seems pretty accurate. (12v only)
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Old 01-03-2016, 02:24 PM
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Re: Question on voltage.

Quote:
Originally Posted by Jsboening View Post
You should be all good until you decide to install a huge winch on the front. Then you may want dual alternators.


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dual alternators wont help much. Even a 20,000lb capable winch is ounly going to draw 100amps, which the stock alternator WILL handle if the vehicle is running, and all accessories are turned off. Replacing the battery with a better, dry cell battery would be more beneficial, cheaper and easier. The biggest difference will be how long you actually can run the winch without having to stop and turn it off, while waiting for the alternator to charge the battery. 100amp winch will run abotu 45 sec-1min with engine off, and still have enough juice to start the vehicle.
point being, the steps before a 2nd alternator would be- better battery- higher output alternator, then a 2nd. Although Im pretty sure a 2nd alternator will make the computer freak out... meaning the computer would sense the battery being charged, and limit the STOCK- 1st alternator. resulting in the 1st alternator not outputting much, because the battery is getting what it needs from the 2nd.
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Old 01-03-2016, 02:29 PM
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Re: Question on voltage.

as far as your original question. dont worry about it. in passenger (12v) systems, its common for battery voltage to range from 11v-16v during operation. less than 12.6 when engine is OFF for more than 10 min is an issue. 14.4 @ the battery is normal. Battery voltage will change depending on engine RPM and the load. (what is being used).. in your case the power steering is using power, so it takes it from the battery. the computer recognizes this and stops limiting the alternator. no limit on the alternator, battery gets more power, voltages goes back up.
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