Installation Guide

Connection Procedures (please refer to the connection diagram above)
1. Once the controller has been properly mounted select either Lead – Acid or Gel –
Cell Battery modes (refer to label below).
Caution: Do not attempt to change the battery type selector switch during charging, doing
so may affect the LCD meter reading.
2. Connect the solar panel positive side to the charge controller “ARRAY” positive (+)
with a suitable wire. Be careful not to short circuit the solar array.
3. Connect the solar panel negative side to the charge controller “ARRAY” negative (-)
with a suitable wire.
4. Connect the battery positive side to the charge controller “BATTERY” positive (+)
with a suitable wire.
5. Connect the battery negative side to the charge controller “BATTERY” negative (-)
with a suitable wire.
Please pay close attention to the following wire specifications.
Wire Size
Refer to the “WIRE SIZE” chart below to determine the minimum size wire needed for each
connection. When using heavy stranded wire, you may need to divide the ends into two
groups and straddle the screw on the terminal block.
WIRE SIZE
Battery Connection Distance Round
Trip
Solar Array Connection Distance Round
Trip
Length of
Wire
not more than 0.6m (2ft)
6m (20ft)
9m (30ft)
12m (40ft)
AWG
6 or 8
10
8
6
Wire Type
It is better to use a stranded wire than a solid wire. Stranded wire does not fatigue and cause
loose connections over time as easily as solid wire. Use red wire for positive (+) and black
wire for negative (-). One 6 AWG wire (stranded) or two 8 AWG wires are suitable. It is best
to connect the wires to the controller using crimped connectors. Ensure tight connections.
Any variation of wire size or length will affect the performance of the charge controller as
well as the LCD display.
Operation
Once properly mounted and connected the charge controller will start charging immediately given
adequate solar power. The 12 Volt 30 Amp Digital Solar Charge Controller is based on a three
stage charging algorithm, Bulk Charge Mode, Constant Voltage mode and Float Mode. During
charging period you may select the LCD meter to read either the battery voltage or charging
current at any time.
Battery condition is indicated by the LED lights. The controller will indicate the battery condition
in three states: GOOD (green), FAIR (yellow), LOW (red). Please refer to label.
Please note the charge controller is not able to start the charging process if the initial battery
voltage is less than 5 volts (+/- 0.3).