T&T: 24V starter, 12V house bank - Ugh!

[Al Thomason]

There is a technology called  'Series / Parallel Switches' which will 
connect two batteries in series while being 'used' to get 24v, then when 
'off' reconfigure to parallel the batteries to allow connection to 12v for 
charging.  Have seen these speced for Bow Thrusters (e.g.: 
http://shop.torresen.com/ships_store/index.php?p=details&mfc=VETUS&sku=BPSP&frm=g ) 
(but do note this item will not carry the current needed for a starter).  It 
also seems that some light trucks did this as well, perhaps can find a unit 
that way.

But given the cost to the unit, plus the need to add a 2nd 12v battery I 
would think that just having the correct 12v starter installed would be the 
way to go.

The installer is taking no responsibility here?

-al-