3.0 Setup
23
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Group/Code
Size
Physical Size
(L” x W” x H”)
Battery
Voltage
Battery AHrs
(20-hr rate)
GC-2 (Golf cart)
10
3/8
x 7
13/16
x 10
5/8
6V
220 AHrs
L-16
11
11/16
x 7 x 16
11/16
6V
375 AHRs
Group 22
9
1/2
x 6
7/8
x 8
5/16
12V
55 AHRs
Group 24
10
1/4
x 6
13/16
x 8
7/8
12V
70 AHRs
Group 27
12
1/16
x 6
13/16
x 8
7/8
12V
95 AHRs
Group 31
13 x 6
13/16
x 9
7/16
12V
110 AHRs
4D
20
3/4
x 8
3/4
x 9
7/8
12V
200 AHRs
8D
20
3/4
x 11
1/8
x 9
7/8
12V
250 AHRs
Once you’ve determined the amp-hour capacity of each battery, review how
your batteries are connected (parallel or series) to determine the total amp-
hour capacity of the battery bank:
Parallel connection
– batteries connected in parallel (positive to positive,
negative to negative) increase the AHr capacity of the battery bank, but
the voltage remains the same.
Series connection
– batteries connected in series (positive to negative)
increase the voltage of the battery bank, but the AHr rate remains the
same.
In battery banks where you have batteries connected in series and in parallel,
the rules are the same. The batteries connected in series are referred to as a
‘series string’ and the amp-hour capacity doesn’t change. Each series string
is connected together in parallel to increase the amp-hour capacity. Add the
amp-hour capacity of each series string connected in parallel to determine
the total amp-hour capacity of the battery bank.
How do I determine my Battery Amp-Hour capacity?
The inverter
requires deep cycle batteries, which are speci
fi
cally made for continuous
use. The batteries are rated either by AHrs or reserve capacity in minutes.
•
Amp-hour (AH) capacity is a measurement of how many amps a battery
can deliver for a speci
fi
ed length of time (usually 20 hours) until the
voltage achieves 1.75 VDC/cell at 80° F.
•
Reserve Capacity (RC) is a measure of how many minutes a battery can
deliver a certain amount of current (usually 25A) and maintain a voltage
above 1.75 VDC/cell at 80° F.
Info:
If using the Reserve Capacity (25A), the 20-hour AH capacity
can be estimated by multiplying ‘minutes reserve capacity’ by 50%.
Table 3-3 provides an estimated 20-hour amp-hour capacity based on the
group/code size, physical size, and voltage of the battery. If you are not
sure of your battery’s 20-hour AH rating, consult your battery manufacturer/
dealer or use the table below to obtain an estimate.
Table 3-3, Battery Size to Battery AmpHrs (estimated)
