Or to state it another way if you don't have an amp-hour
meter (which you should), 12.2 volts is a good lowest
voltage.

DOug
s/v Callista

"Peter Bennett" wrote in message
news.com...
On Sat, 20 Dec 2003 19:39:04 +0100, "Ric" wrote:

I have just bought a couple of Delphi Freedom marine deep cycle batteries
for my service bank. Is there a recommended minimum voltage below which
one
should not discharge? Also, if the nominal capacity is (say) 100Ah, is
that
measured between standard voltages or is it measured from a nominal full
charge (with full charge voltage dependent on the charging system) until
totally discharged - ie 0v? Or is there a standard "never go below"
voltage
which manufacturers use?

10.5 volts is considered "fully discharged".

For best results, it is generally recommended that you should only
discharge a battery to 50%, so you should only take 50 AH from a 100
AH battery.




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Peter Bennett, VE7CEI
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