Holiday Navigator 2003 Owner's Manual page 335

Discharge and recharge time of the house batteries will vary depending on
the type of load and voltage during the charge or discharge cycle. Discharging
the batteries at a slow steady rate to a specific voltage, then charging the
battery bank for the same amount of amp hours removed during the discharge
cycle, will not yield a charged battery bank. The AGM battery bank, though
very efficient, is not a perfect trade with amp hours discharged and charged. In
addition, the type of discharge load depends on the charge time. A rapid and
heavy discharge cycle yields less available amp hours than a slower discharge
rate. Conversely, a rapid discharge cycle, though equivalent in the same
amount of amp hours as a slow discharge cycle, requires a longer charge time.
Regardless of the type of discharge cycle, it always requires more amp hours
to charge the batteries than what the batteries have discharged.
State of Charge (%)
100
80
60
40
20
0
These voltage levels are approximate and give an indication of the state of charge
of a battery at rest. As the battery ages these voltage measurements will be lower.
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O.C.V./Cell
2.13
2.10
2.05
2.00
1.97
1.93
N A V I G A T O R 2 0 0 3
O.C.V./12 Volt Battery
12.8 or greater
12.6
12.3
12.0
11.8
11.6
or less
Electrical Systems - House
8 • 3 3 5