Quick Charge QPA12v/50A - Manual (Page 3)

PREPERATION:
Determine how many batteries you want to charge. You have 50 amps of capacity which will be divided between the
number of batteries on line. For example, if you put 10 batteries on line and turn the rate control wide open, each battery
will receive approx. 5 amps. Conversely, you could charge 1 battery at anywhere from 1 50 amps. Next, determine the
maximum voltage you want to reach, if you are not sure, consult the battery mfg., or use these settings as a general rule.
VOLTAGE SETTING & NORMAL OPERATION:
1). First, we will set the maximum voltage you want to reach. The easiest way is to connect (1) fully charged battery to the
charger, but before we do that, move switch to off position, and turn both controls down.
2). Observing polarity, connect the leads to the battery. Plug the charger into a circuit known to have 117 volts 60 Hz.
Move the switch to the ON position.
3). Turn the voltage control up to about the AGM marking. Slowly turn the current control up until the voltage rises ½ to
1 volt beyond the point you want to set (if you can t reach it, turn the voltage control up more), then set the voltage
control back to the desired setting. When selecting the final voltage it is important that the current be below 5 amps or the
set point will drift lower as the current declines. A below 5 amp reading should be easily obtainable on a fully charged
battery, if not, wait till it lowers.
4). Leave the voltage control at set point. Turn current down, and move switch to OFF position.
5). Now you can begin connecting batteries of the same type in parallel, or series parallel as shown in the illustration.
Connect each battery to the charging bus with 8 awg wire. Make sure all connections are clean and secure.
6). Now turn the charger back ON and increase the current control. Remember, whatever the current is on the ammeter is
divided among the batteries. The amount of current going to each battery will be proportionate to it s depth of discharge.
7). Your battery group has reached full charge when the voltage you selected is registered on the voltmeter, and the charge
current is below 5 amps. If current fails to fall below 5 amps, you probably have a battery with a dead or shorted cell that
is continuing to draw current. This battery should be identified and removed from the group to avoid gassing and over
heating. Don t remove the battery until the charger has been shut down.
ADDITIONAL INFORMATION:
WARNING: A group of batteries should never be left unattended for long periods of time. It is important to
identify and remove bad batteries as described above.
If you desire, you may lower the voltage into the float range and leave the group connected without fear of overcharging.
A float setting of around 13.3 -13.5 should be safe for all batteries.
This charger requires some experience and trial and error. After a few uses you will gain confidence and understanding in
its capabilities.
WARNING: Do not disconnect the DC connections when the charger is on. The resulting arcing could cause
burning of terminals, clips or receptacles.
Gel batteries 13.5 - 14.0
AGM batteries 14.4 - 14.7
Wet starting batteries 13.8 - 14.7
Wet deep cycle batteries 15.0 15.8