[RE-wrenches] unique battery bank design question

[Hugh]

At 15:57 -0400 1/9/11, Jason Szumlanski wrote:

>  A 1A @ 12V fan on a 1000aH @48V battery bank can't make any real 
>difference. Correct me if I am wrong!
>

Yes that is wrong, because after 4 days you have removed 10% of the 
nominal capacity or about 20% of the usable capacity.

Tapping off batteries is bad practice as universally agreed.  One way 
to mitigate it could be to use separate shunt regulators (diversion 
load controllers) for each 12-volt portion.  This would probably be a 
healthy feature for 'balancing' any 48 volt battery and would 
possibly rescue a tapped battery, given enough surplus energy 
availability (which is usually the key thing for battery health).

Just a thought.

The snag is the cost.  ho hum.
-- 
Hugh Piggott

Scoraig
http://www.scoraigwind.co.uk