Installation Manual

SL Range User Guide
Installation & User Guide
SL Range
9
Charge sources to the grey Anderson connector could include:
- External AC charger; or
- External (regulated) solar charger.
The blue connector is reserved for a DC input, to make use of the internal DC-DC charger. The DC-DC
charger is rated for 20A input from a vehicle alternator or start battery.
Figure 4 – DCS Model Anderson Connectors
5.3 Tuning the DC-DC Charger
The internal 20A DC-DC charger contains a Voltage Sensing Relay (VSR). As shown in Figure 5 the VSR
has an LED status light and adjustment trim pot, which can be used to adjust at what input voltage
(from the vehicle alternator / start battery) the DC-DC charger turns on and off. There is a dead-band
of 0.5V, so that it typically turns on at 13.3V and turns off at 12.8V.
Figure 5 – DC-DC Charging Terminal Connections