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Raymarine a65/dsm25 low battery alarm

Old 03-01-2015, 07:54 AM
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Default Raymarine a65/dsm25 low battery alarm

Mine keeps sounding randomly

Starting battery is showing 13v, house battery showing 12.4

Both measured while boat was running idle


The alarm says its 10.6v

Any ideas on how to fix?
Old 03-01-2015, 08:33 AM
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If the motor is at idle you should be closer to 13.5-14v and definitely not at 12.4v. Raise the rpm on motor and see if you are getting 14v to confirm the alternator is working properly.
If the motor is off you will be closer to 12.4v. Sounds like your house battery is about shot and not providing enough power to keep the alarm off.
To check that battery disconnect wires and check voltage. Write it down and check voltage tomorrow morning and see what the voltage is. If below 11v you need a new battery.
Old 03-01-2015, 09:37 AM
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Will the alternator charge the house battery if i put the selector switch on battery 2 while running at higher rpms.
Old 03-01-2015, 06:20 PM
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Originally Posted by sabanist View Post
Will the alternator charge the house battery if i put the selector switch on battery 2 while running at higher rpms.
Yes

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