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  Battery Terminal Voltage = 11.5-volts

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Author Topic:   Battery Terminal Voltage = 11.5-volts
Bruno06 posted 10-17-2006 03:49 PM ET (US)   Profile for Bruno06   Send Email to Bruno06  
I've changed battery and alternator but only charge up 11.5 . Why my battery don't go up to 13 amp? Do you think I am not wiring properly? PLease, if you can, help me out.
HAPPYJIM posted 10-18-2006 09:51 PM ET (US)     Profile for HAPPYJIM  Send Email to HAPPYJIM     
Try checking the voltage with a different meter.
jimh posted 10-19-2006 08:42 PM ET (US)     Profile for jimh  Send Email to jimh     
A "12-volt" battery with a terminal voltage on only 11.5-volts is 90-percent discharged. It is almost dead. For information on battery terminal voltage as an indicator of charge level, see my article:

Battery Charge
http://continuouswave.com/whaler/reference/chargeBattery.html

The output from a typical charging system should be about 14-volts.

A fully charged battery will have a terminal voltage of about 12.9-volts.

swist posted 10-20-2006 07:50 AM ET (US)     Profile for swist  Send Email to swist     
Borrow a digital (or high quality analog) voltmeter. If you are relying on the one on the boat, they an be very inaccurate.

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