Charging rate for accessory battery

S

sailonfrigg

.
Jun 28, 2006
3
When a meter is attached to the accessory battery the charge recorded
is very low. The engine is a MD7 and the alternator has been checked.
The postive cable seems very black when the cover is remoed.

Any suggestions?

Dave
 
V

Vega1447

.
Oct 19, 2019
921
Albin Vega 27 Limerick
Hmm. Perhaps you spend too much time sailing and not enough time
motoring! :)

Dave: my setup has two identical 75Ah batteries wired in parallel. Both
seem to charge up ok...

Welcome to the list.

John

Vega 1447 Breakaway (only 250M SW of Frigg)

sailonfrigg said in an email sent on 13/09/06 12:32 that:
 
W

wxt8981

.
Oct 31, 2019
562
Hi;
the charging voltage should be around 13 to 14 volt and
then drop off
If you don't have a voltmeter meter, you might have one
with your GPS
Wilhelm, V-257
 
T

txsailcouple

.
Sep 9, 2006
45
Disconnect the battery and check the voltage under a 'no load' condition. If it is less than 12 volts you may have a bad cell and need to replace the battery. After ten minutes of sitting idle check it again to see if it has changed substantially, 1 volt or more. If it reads higher you may have a charging problem. If it is lower you definitely have a battery problem. If the terminal lug on the end of the cable seems to have corrosion or just some blackening of the wire around where it is crimped you may have some resistance building up. Resistance anywhere in the charging circuit will cut the effective charging voltage down. Have new lugs crimped onto the wires and be sure to use some grease or corrosion preventive gel on the terminals too.

sailonfrigg sailonfrigg@... wrote: When a meter is attached to the accessory battery the charge recorded
is very low. The engine is a MD7 and the alternator has been checked.
The postive cable seems very black when the cover is remoed.

Any suggestions?

Dave
 
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