User manual

3.0 INSTALLATION INSTRUCTIONS
MORNINGSTAR CORPORATION 19
3.0
Step 3: Solar Wiring
WARNING: Risk of electric shock! Exercise caution when
handling solar wiring. The solar array high voltage
output can cause severe shock or injury. Cover modules
from the sun before installing solar wiring.
The SunSaver MPPT can accept 12 V , 24 V, or 36
V nominal off-grid solar module arrays. Grid-tie solar
module(s) may be used if the open circuit voltage (V
oc
) does
not exceed the SS-MPPT 75 Volt maximum solar input
rating. The solar module(s) nominal voltage must be equal
to or greater than the nominal battery voltage. For 24 V
systems, a 24 V or 36 V nominal solar array must be used.
Figure 6. Solar input wiring.
12 Volt
MODULE
12 Volt
MODULE
12 Volt
MODULE
SOLAR
POSITIVE (+)
SOLAR
NEGATIVE (-)
(+)
(+)
(+)
(-)
(
-
)
(
-
)
36 V NOMINAL MAX.
EARTH
GROUND
Connect the solar module(s) to the SS-MPPT. Refer to the
wire gauge chart on page 41 of this manual for correct wire
size.
If required, the negative solar connection may be
earth grounded. Use appropriate gauge wire and proper
grounding methods for the installation site.
Step 4: Accessories (optional)
Install the Remote Temperature Sensor and Remote
Meter (both purchased separately) if required. Refer to
the instructions provided with each accessory for detailed
installation procedures.
Step 5: Con rm Wiring
Double-check the wiring in steps 1 through 4. Con rm
correct polarity at each connection. Verify that all seven (7)
SS-MPPT power terminals are tightened.
Figure 7. System Wiring Review
+
-
2
1
3
Step 6: Install Fuses
Install a 25 Amp DC-rated fuse in each fuse holder in the
following order:
1. Load circuit
2. Battery circuit
Step 7: Con rm Power-up
The SS-MPPT should begin the power-up LED sequence
when battery power is applied. Observe that the Battery
Status LEDs blink in sequence one time.
If the SS- MPPT does not power up or a  ashing LED
error sequence exists, refer to Section 6.0 Troubleshooting.