Adam,
     Yes, you can do this. Just charge the batteries at 24v across both=20
of the batteries. I have done this exact thing with two six volt batteries.
Thanks,
rich!

On 7/27/2015 7:14 PM, Adam Field wrote:
> This is a former Canadian vessel, which uses mostly 24VDC electronics as
> well as alternator, starter, etc. The 24V lead acid battery bank is 2 x 1=
2V
> batteries in series.
>
> South of Canada, the standard is 12V so we have a lot of 12V electronics =
-
> radios, GPS, etc.
>
> Can I borrow the center tap of the batteries to make a 12V bus? This woul=
d
> create an imbalance during charging I imagine - lowering the charge volta=
ge
> across the battery connected to ground.
>
> The batteries in question are 12V AGM, 200AH each.
>
> The 12V bus would supply up to 25A, but only when the alternator is runni=
ng
> - otherwise I imagine the charge imbalance would get out of hand.
>
> Am I better off with a DC to DC converter?


--=20
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