C) MODE SWITCH
The #4 DIP switch activates or deactivates the MODE
function. If you donʼt want to use the “Auto-Equalization”
MODE or the “Auto-Float” MODE, then place this switch in
the off position. This locks the SOC voltage setpoint to wherever
you set it .
D) BATTERY TEMPERATURE COMPENSATION
Refer to FIG. 1 or 2 on pages 5 and 6 for location of the
“TEMP. COMP.” jumper on the circuit board. Move the jumper
to the “ON” position only if you are going to extend the temp.
comp. sensor to the battery from the RV-45D.
If you choose not to use this feature, be sure to de-activate
it by leaving the jumper in the "OFF" position
NOTE on Temperature Compensation Misuse:
If the remote sensor is not installed, make sure the Temp.
Comp. Jumper is in the OFF position! Failure to do this
WILL result in damage to your battery!
E) AUTOMATIC EQUALIZATION
If you have Flooded Lead-Acid, Deep-Cycle Batteries
and wish to use this feature then refer to FIG 1 on page 5 to set
it up and activate it. The “MODE” jumper must be in the “EQ”
position and the #4 (MODE) DIP switch must be in the “ON”
position.
F) AUTOMATIC FLOAT
If you have Sealed, Absorbed Glass Mat or Gel Batteries
and wish to use this feature then refer to FIG 2 on page 6 to set
it up and activate it. The “MODE” jumper must be in the “FL”
position and the #4 (MODE) DIP switch must be in the “ON”
position.
Operation of the RV-45D
A) WITH AUTOMATIC EQUALIZATION ACTIVATED
As the sun rises, (and the solar panels reach a voltage
that is slightly higher than the battery voltage), the RV-45D will
deliver all available charging amperage to the batteries. The
battery voltage will rise under this inuence until it approaches
whatever SOC voltage setpoint you have selected.
At this point, the controller will begin to taper off the
charging amperage slightly and check to see if the battery is
really at the SOC voltage setpoint. After a couple of minutes,
the controller will go into its Automatic Equalization cycle.
During this Equalization period, (which only happens
once a day after the rst time the battery reaches its SOC
voltage setpoint), the controller allows full charging amperage
to continue to be delivered to the battery for about 30 minutes.
This effects a short term “overcharge” during which plate
sulfation is driven back into solution and weaker cells are
allowed a little extra time to reach full charge.
Depending on how much solar power you have and how
many electrical loads you have on, your battery voltage may
climb as high as 0.8 volts above the SOC voltage setpoint you
have selected. The RV-45D will not allow the voltage to go
higher than that.
After this 30 minute Equalization period, the controller
will enter its Pulse Width Modulation “Taper” cycle and only
deliver whatever amperage it takes to maintain the SOC voltage
setpoint. This will hold the batteries at their highest state-of-charge
with the least amount of water consumption.
As the sunlight fades and evening approaches, the
battery voltage will begin to fall from the SOC voltage setpoint
to a lower point that is closer to its “at rest” voltage.
This cycle will be repeated the following morning.
(7) (8)
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