User manual

3.0 INSTALLATION INSTRUCTIONS
MORNINGSTAR CORPORATION 17
Step 1: Load Wiring
The SS-MPPT load output connection will provide battery
voltage to system loads such as lights, pumps, motors,
and electronic devices. See Section 4.4 Load Control
Information for more details about load control.
LOAD
POSITIVE (+)
LOAD
NEGATIVE (-)
25 AMP
FUSE
Figure 4. Load wiring
Connect load positive (+) and negative (-) load wires to
the system load(s) or load distribution panel as shown in
 gure 4. Refer to the wire gauge chart on page 41 of this
manual for correct wire size.
If required, the negative load connection may be
earth grounded. Use appropriate gauge wire and proper
grounding methods for the installation site.
An in-line fuse holder should be wired in series in the load
positive (+) wire as shown. DO NOT INSERT A FUSE AT
THIS TIME.
If wiring the load connection to a load distribution panel,
each load circuit should be fused separately. The total load
draw should not exceed the 15 A load rating
3.0
Step 2: Battery Wiring
6 in (150 mm)
MAX.
BATTERY
NEGATIVE (-)
BATTERY
POSITIVE (+)
+
-
25 AMP
FUSE
12V / 24V
BATTERY
EARTH
GROUND
Figure 5. Battery wiring.
Before connecting the battery, measure the battery
voltage. It must be over 7 volts to power the controller.
For 24 volt systems, the battery voltage must be greater
than 15.5 volts to properly detect a 24V battery. The 12/24
volt battery detection is automatic and the check is only
performed at start-up.
Connect the battery to the SS-MPPT. Refer to the wire
gauge chart on page 41 of this manual for correct wire size.
If required, the negative battery connection may be
earth grounded. Use appropriate gauge wire and proper
grounding methods for the installation site.
Wire an in-line fuse holder no more than 6 inches (150
mm) from the battery positive terminal. DO NOT INSERT A
FUSE AT THIS TIME.