"Meindert Sprang" wrote in message ...
"Capt. Neal®" wrote in message
...
Duh! the two batteries are in series. The one with the 12v tap cannot
become
more discharged than the one without because the battery without the tap
will charge the one with. Or the one with will discharge the one without
until they are both the same. This is the same thing that happens with
individual cells in a 12v battery. With two 12v batteries in a series one
simply has more cells in a series.

If you became familiar with the concept of batteries in series and batteries
in parallel, then come back and review your own reply.


Wrong, wrong, wrong, wrong, wrong, wrong and incorrect!
How can some people's minds be so ineffective at thinking?

Just what the hell do you think a 12v lead acid battery is, anyway?
One giant 12v cell? NOT! A twelve-volt, flooded, lead/acid battery
consists of six cells of approx 2.2v each. These cells are in a series.
When the battery is charged, electrons move through all the cells or
the battery will not be charged. Open one cell and the whole battery
will show dead because no current can move though the collection
of cells in a series but the cells that are not open will show approx.
2.2 volts each. As long as the cells are all connected and none of
them are open (or shorted) the battery works as a unit.

Perhaps you ******s would understand it better using flashlight D cells
as an example. Take one D cell that is half charged (Ni-Cad) and put it into
a two-cell flashlight in the company of another NI-Cad) D cell that is fully
charged and turn on the switch. The bulb will light and current will
pass through the circuit. As well as working to light the bulb, the
fully-charged cell will discharge into the half charge cell until
the voltage in both cells equalizes.

There is no difference between two 12v batteries in a series. As long
as the two batteries are are part of a circuit, which is the case in any
yacht (unless an isloation switch is turned off so the circuit is no more)
then, as is the case in the flashlight example, the two batteries will
equalize and they will do so even if one battery has more of a load
on it than the other because of a 12v tap to run a VHF.

Anytime the two 12v batteries in series are not part of a circuit then
the battery with the 12v tap will have its voltage lowered and the
battery without the tap will remain unaffected. Two 12v batteries
connected in series but not part of a circuit remain, for all practical
purposes, two separate batteries.

You need to learn how circuits work before you spew your nonsense,
Mr. Sprang. It seems to me you're confused when it comes to knowing
the difference between volts (pressure) and amps (flow). Batteries
always have voltage unless discharged but they only have amperage if
they are part of a circuit. Since the batteries, connected as part
of a circuit in Nigel's yacht, are in series in the circuit they will
both have equal voltage as long as they remain part of said circuit.


I hope this helps.

CN