batt charging - is this a problem ?

[jneale]

I do a lot of motoring. when the batts a fully charged after about 3 hours or so of slow motoring (1500 rpm). (voltmeter shows 14v), alternator light comes on indicating that it has stopped charging. Batt volts now resting at 12.5v. To turn light off, I give a quick burst of throttle (2000 rpm) to get it charging again.

I have 2 newish 100ah batts running through an adverc regulator.
they are both sealed and I am unable to check electrolye level

My question is - Am I overcharging the batts, or should I just ignore it ?

 

[Slipstream 34]

Might be worth checking the alternator belt tension. It could be slipping at low rpm causing the light to come on.

 

[VicS]

alternator light comes on indicating that it has stopped charging.

Unless this is some peculiarity of the Adverc regulator, about which there is no mention in the instructions.

The alternator warning light should not come on simply because the batteries have fully charged.
It should only come on to indicate that the alternator is no longer generating due to a fault.

A fully charged battery should read around 12.7 volts after resting for 12 hours or so with no charging and no load.
If the battery volts is only 12.5 and there is no load then it is not fully charged.

 

[pmyatt]

I do a lot of motoring. when the batts a fully charged after about 3 hours or so of slow motoring (1500 rpm). (voltmeter shows 14v), alternator light comes on indicating that it has stopped charging. Batt volts now resting at 12.5v. To turn light off, I give a quick burst of throttle (2000 rpm) to get it charging again.

I have 2 newish 100ah batts running through an adverc regulator.
they are both sealed and I am unable to check electrolye level

My question is - Am I overcharging the batts, or should I just ignore it ?

Almost certainly due to Adverc programming. The controller is probably set to adopt a float charge after a certain period of time, irrespective of state of charge, to prevent gassing/overcharging.

 

[VicS]

Almost certainly due to Adverc programming. The controller is probably set to adopt a float charge after a certain period of time, irrespective of state of charge, to prevent gassing/overcharging.

Perhaps you could explain this "programming" and how it is set to "adopt a float charge after a certain period of time"

These are things not mentioned in the instructions.