Installation Guide

Operation
900-0009-01-00 Rev C 35
Diversion (AUX Mode)
When external DC sources (wind, hydroelectric) are directly connected to a battery bank, any excess
power should be sent to a diversion load, such as a heating element, using a mechanical relay or
solid-state relay.
In Diversion mode, the user programs set points — from -5.0 volts to 5.0 volts relative to the
Absorbing, Float, and EQ voltages — to activate the AUX output. The Diversion AUX mode can be
active (ON) when the battery voltage is raised above one of these set points for a certain amount of
time or inactive (OFF) when it falls below.

To control a mechanical relay for basic on/off switching of a standard diversion load, follow the instructions
in Figure 25 (both pages).

To control a solid-state relay for PWM switching and precise control of a load, follow the instructions in
Figure 26 (both pages). This application should not be used with a mechanical relay. It requires the use of a
resistive load and should not be used with other sorts of loads.
For a wiring diagram illustrating how to connect this function, see Figure 27.
Diversion:Relay Mode
Figure 25 Setting the Diversion:Relay AUX Mode (Part 1)
IMPORTANT:
If using wind or hydroelectric turbines, keep the
charge controller’s diversion voltage slightly
above the Absorbing and Float voltage settings
for efficient functioning.
To set the mode for Diversion:Relay:
1. From the main menu, press <> or <> to move the
 to the
left of Aux.
2. Press <GO> to open the AUX MODE screen.
3. Press <NEXT> until Diversion:Relay is displayed in the AUX
MODE screen.
4. Press <MODE> to cycle through the mode set points
ON, OFF, or AUTO.
 ON activates the AUX output.
 OFF deactivates the AUX output.
 AUTO controls the output according to the criteria of the
selected AUX mode.
Continued on next page....
Charger Aux Light
EQ Misc Advanced
Logging Stats
EXIT   GO
Main Menu
Charger Aux Light
EQ Misc Advanced
Logging Stats
EXIT   GO
AUX MODE 
Diversion:Relay
Output: Off Off
EXIT NEXT SET MODE
<NEXT> proceeds to the
next AUX MODE screen.