Introduction
The RV-45D is a standard 45 amp, 12Volt DC, series
type Pulse Width Modulated charge controller that utilizes
power MOS FET technology that eliminates relays and
subsequent failures associated with them. The RV series type
charge controller maintains the exact state-of-charge (SOC)
voltage by frequent on and off switching of the photovoltaic
source.
It is literally two charge controllers in one, and as such,
the RV-45D allocates the charge to both the house and the en-
gine batteries. The “Engine” battery charging circuit is limited
to 3 amps with a state-of-charge voltage xed at 13.4 VDC.
Whenever the Engine battery is at a lower voltage than the
House batteries, some of the charging current is sent to it.
The “House” battery charging circuit can deliver up
to 45 amps with a selectable state-of-charge voltage
from 13.2 VDC to 14.6 VDC. The Temperature Compensation
feature only works on the “House” battery circuit. “Auto-Equal-
ize”, “Auto-Float” and “Fixed” also only affect the “House”
battery circuit.
The RV-45D is a fully automatic controller. Basically,
after all the settings are made and the controller is installed, it
takes care of everything else!
(3)
Field Selectable Options
A) SETTING DIP SWITCHES
The 4 DIP switches are used to eld select SOC (state-
of-charge) and MODE. Switches #1, #2, and #3 set the SOC
nish voltage and switch #4 turns the MODE on or off.
(Refer to FIG. 1 or 2 on pages 5 and 6
for location of DIP SWITCHES on the circuit board)
1 2 3 4
SOC VALUES
ON
OFF
MODE
SWITCH
(4)
B) STATE-OF-CHARGE (SOC) VOLTAGE
The battery state-of-charge voltage is selected with DIP
switches #1, #2, and #3. Refer to the following chart to determine
correct switch positions for the desired voltage setpoint. Move
appropriate switches either ON or OFF according to the chart.
SOC voltage may be changed once the RV-45D is connected.
System Voltage
DIP Switch Number
STATE-OF-CHARGE VOLTAGE
12 VDC 1 2 3
13.2
13.4
13.6
13.8
14.0
14.2
14.4
14.6
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
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