Installation Guide

MORNINGSTAR CORPORATION 31
3.0
30
3.0 INSTALLATION
Step 1: Load Wiring
The SS-MPPT load output connection will provide battery
voltage to system loads such as lights and other electronic
devices. Do not connect inductive loads such as
inverters, motors, pumps, compressors, generators to
the load terminals. Connect inductive loads directly to
the battery.
See Section 4.4 - Load Control Information for more
details about load control.
LOAD
POSITIVE (+)
LOAD
NEGATIVE (-)
Fuse or breaker sizing
based on required wire
ampacity
Figure 4. Load wiring
Connect positive (+) and negative (-) load wires to the
system load(s) or load distribution panel as shown in Figure
4. Refer to the wire gauge chart on page 65 of this manual
for correct wire sizing.
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 15A load rating.
Step 2: Battery Wiring
WARNING: Shock Hazard
Fuses, circuit breakers, and disconnect switches
should never open grounded system conductors. Only
GFDI devices are permitted to disconnect grounded
conductors.
AVERTISSEMENT: Risque de décharge électrique
Les fusibles, coupe-circuits et interrupteurs ne doivent
jamais ouvrir les conducteurs du système mis à la terre.
Seuls les dispositifs GFDI sont autorisés à déconnecter
les conducteurs reliés mis à la terre.
6 in (150 mm)
MAX.
BATTERY
NEGATIVE (-)
BATTERY
POSITIVE (+)
+
-
Fuse or breaker
sizing based on
required wire
ampacity
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.