14
HOW TO SET (BATTERY CAPACITY)
The first time you apply power to a
Link 20
, it assumes you have two banks of
200 amp-hours battery capacity each. 200 amp hours is the factory default capacity. If
your battery capacity is different (and it probably is) you must change the declared
battery capacity. Before you try to set battery capacity, you'll need to know what your
battery (or battery bank) should deliver.
The surest way is to ask for the manufacturer's 20 hour rating. If that's missing, remem-
ber that for 12-volt
liquid
cells, a Group 24 battery has about 85 amp hours, a Group 27
size has about 100 amp hours, a Group 30 has about 130 amp hours, while 4Ds hold
about 160 amp hours and the heavier 8D is generally about 220 amp hours.
Gel
cells
generally hold about 15% fewer amp hours for a given size. A Group 27 case gel cell
stores about 85 amp hours.
If you use two batteries in parallel, as a single bank, use twice the amp-hour capacity of a
single battery. For three batteries in parallel, use three times the amp-hour capacity. If
you parallel batteries, use the same size and same age batteries. If you use two batteries
in series, such as two 6 V golf cart batteries, use the amp-hour capacity of one battery.
For example, if you have three 12-volt Group 27 batteries in
parallel
, you would use
(100 Ah x 3) 300 Ah for your battery capacity. Two Trojan T-105 6-volt golf cart
batteries in
series
would use the factory default 200 amp hours for capacity.
If you need to change the default setting, here's how you do it:
1.
Press
SET
for five seconds.
SEL
will appear in the numeric display.
2.
Press
SEL
three times.
The light will come on and
200
will
appear in the numeric display.
3.
Press and hold
SET
.
The display will move in 20 amp-hour steps over
100 amp hours of capacity. 1 amp-hour increments
are shown from 20–40 amp hours of capacity, 5
amp-hour steps from 40–100 amp hours capacity.
If you continue to hold
SET
, after four increments
the display scrolls faster. When the value you want
appears, release the
SET
button. If you overshoot
your capacity you will have to scroll all the way to
1980 amp hours after which the display will roll over
and begin scrolling up starting from 20 amp hours.
4.
After 10 seconds, the displayed
setting is stored to memory and
normal operation resumes.
