I tend to look at stuff like this as a risk/reward balance.
The reward side is easy enough, you avoid a few $100 worth of parts and
their install.
The risk side is a little trickier...
What are you going to do to rebalance the batteries?
How much will this shorten battery life? (highly depends on what you do to
rebalance them)
What happens when someone else has to service the system? (there's a
scenario when you disconnect one battery, your equipment could see reversed
polarity)

For _me_, I'd do it without a second thought. For something a customer was
paying for or something my wife has to use if I'm not around - not a chance=
,

FYI, a wee bit of googling found this
http://www.powerstream.com/dcdc-24V.htm
Might be some options there.


-Denny
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