Hello,
just wanted to add to sth. i said before:
Normal charge (quick charge did not really change the recharging times):
(previous de-charging/emptying with 2750 A = 8250 Ah)
Full charge:
9488 Ah = 115 % 6 hours 45 minutes
9075 Ah = 110 % 6 hours
8890 Ah = 100,5 % 4 hours 30 minutes
new -- > 7310 Ah = 88,6 % 3 hours 45 minutes
I took the numbers out of graphs describing grades of effectiveness and battery-graphs. The times may differ depending of all those other influences mentioned before and losses during transfer, mechanical and electrical. However the numbers above are what was observed and tested in reality, so no theoretical calculations.
Tested battery type: 44 MAL 740 E/21, 6 x 62 cells
From what i understand the batteries had been emptied with 8250 Ah here, a full new charge (115%) would be 9488 Ah (this is Ampère per hour, so it was discharged with one A for 8250 hours, or 8250 A in one hour, or most probably something in between). Don't know whether this is correct, but if i substract one number from the other, the emptied battery would still have had some 1238 Ah - maybe this is not a "deep discharge", but a level that would be usual during a normal cruise without draining the very rest out of the batteries and probably damaging them.
I'm still looking through the book, but please bear with me, the information is scattered over all those pages
- i'll post again if i find something new.
Thanks and greetings,
Catfish