G
Guest
Guest
Having survived many years with the old 1-both-2-off battery switch .... contrary to some on forum who advocate the rubbish bin for the switch ! I have been looking through various books and notes I have collected over years ... Last year I was trying to get around the having to remember to switch between batterys when charging etc. - when I came across a gem !!
Last year I was given a heavy duty split diode thingy to connect my batterys to for split charging. Of course it then proved that my alternator was Machine Sensed - not battery sensed. A flop was the result and disconnected - back to square one and a good charge again.
What is this GEM ? I found a reference to converting a standard alternator that does not like split diodes to a Virtual Battery Sensed version ..... I say Virtual - as I cannot think of any other way to describe the cunning trick !
How to do it >>> The back of the alternator has the regulator and various contacts .... We need to fool the alternator into thinking that the voltage across the system is less than 14V by the addition of a diode. The diode is fitted between the Auxiliary Terminal and the regulator. This diode will cause the regulator to see 14V less 0.7V drop by the diode ... 13.3V. It will then raise the output to regain the 14V level .... therefore in reality the split diodes then receive the 14.7V and after their losses of 0.7V - charge your system at required 14V.
Phew ..... so as the article says - the diode does not have to be an expensive item and simply alters the output to compensate for the split diodes ........
Obviously as the article warns - DO NOT revert to direct connected charging with this still connected as then batterys will receive 14.7V ......
So my question to the forum is >>>>>>>> Has anyone ever done this ? How do you identify the terminals to fit the diode to and which way round ... (the diagram I have shows the diode arrow towards the regulator).
I have an idea that can piggy-back on this .... if the diode was linked via a switch and a by-pass available to charge with or without the split diode as you choose .... then you have both worlds .... prone to error I accept ... but food for thought ...
Certainly cheaper than all sorts of over the counter add-ons etc.
/forums/images/graemlins/tongue.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/blush.gif /forums/images/graemlins/cool.gif
Last year I was given a heavy duty split diode thingy to connect my batterys to for split charging. Of course it then proved that my alternator was Machine Sensed - not battery sensed. A flop was the result and disconnected - back to square one and a good charge again.
What is this GEM ? I found a reference to converting a standard alternator that does not like split diodes to a Virtual Battery Sensed version ..... I say Virtual - as I cannot think of any other way to describe the cunning trick !
How to do it >>> The back of the alternator has the regulator and various contacts .... We need to fool the alternator into thinking that the voltage across the system is less than 14V by the addition of a diode. The diode is fitted between the Auxiliary Terminal and the regulator. This diode will cause the regulator to see 14V less 0.7V drop by the diode ... 13.3V. It will then raise the output to regain the 14V level .... therefore in reality the split diodes then receive the 14.7V and after their losses of 0.7V - charge your system at required 14V.
Phew ..... so as the article says - the diode does not have to be an expensive item and simply alters the output to compensate for the split diodes ........
Obviously as the article warns - DO NOT revert to direct connected charging with this still connected as then batterys will receive 14.7V ......
So my question to the forum is >>>>>>>> Has anyone ever done this ? How do you identify the terminals to fit the diode to and which way round ... (the diagram I have shows the diode arrow towards the regulator).
I have an idea that can piggy-back on this .... if the diode was linked via a switch and a by-pass available to charge with or without the split diode as you choose .... then you have both worlds .... prone to error I accept ... but food for thought ...
Certainly cheaper than all sorts of over the counter add-ons etc.
/forums/images/graemlins/tongue.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/blush.gif /forums/images/graemlins/cool.gif
