12 volts
Hi Bruce,
Interesting comments, so I'll chuck this into the mix as well: the Australian Cruiser Tank used three different voltages (6V, 12V and 40V), with the 6 & 12 volt systems reliant on the same design/amp-hour 6 V batteries as the 6V system. The 6V system was grounded to the hull.
The 12V system used 2 x 6V batteries and was wired independently and 'sealed' from the vehicle. A 12V generator was included, run by a connection to one of the transfer case lay shafts.
My point here is that the same 6V battery type was used for both, so could be changed over in the field (with some considerable difficulty) between systems if needed. While a single 12V battery would have reduced the stowage problems a little, battery commonality made interchange between systems possible and also simplified the supply stream.
Mike
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