MORNINGSTAR CORPORATION
27
3.0 INSTALLATION
26
3.0
Step 3: Solar Wiring
WARNING: Shock Hazard
The solar PV array can produce open-circuit voltages
in excess of 40 Vdc when in sunlight. Verify that the
solar input breaker or disconnect has been opened
(disconnected) before installing the system wires.
AVERTISSEMENT: Risque de décharge électrique
Le réseau PV solaire peut produire des tensions de cir-
cuit ouvert supérieures à 40 V cc à la lumière du soleil.
Vérifiez que le coupe-circuit ou l’interrupteur d’entrée
solaire a été ouvert (déconnexion) avant d’installer les
câbles du système.
WARNING: Risk of Damage
Connecting the solar array to the battery terminal will
permanently damage the SunSaver.
AVERTISSEMENT : Risque d’endommagement
La connexion du réseau solaire sur la borne de la bat-
terie endommagera le SunSaver de façon permanente.
The nominal solar module voltage must match the
SunSaver voltage rating. For 12V SunSaver models, only
a 12 V nominal solar module having a maximum open
circuit voltage of 30V may be used. Connect only 24V
nominal solar modules (or two 12V arrays in series) to 24V
SunSaver models. The maximum open circuit voltage of the
24V array must be less than 60V.
SEALED
OR
FLOODED
SELECT
LOAD
BATTERY
SOLAR
Remove
Jumper
Wire for
Flooded
Battery
{
12 V
BATTERY STATUS
TEMP. SENSOR
CHARGING STATUS
!
See Operator’s
Manual
Nominal Rating
12 Volts dc
Max. Input 30 V
Solar 20.0 A
Battery 20.0 A
Load 20.0 A
Max. Ambient 65
º
C
indoor use only
Use 75 ºC Copper
Conductors Only
CONFORMS TO ISA 12.12.01
CERTIFIED TO CAN/CSA STD
C22.2 NO.213-1992
Class I, Division 2
Groups A,B,C,D
Hazardous Loc.
Temp. Code: T5
RoHS
MORNINGSTAR
S S
20L
UN AVER-
SOLAR CONTROLLER SS-20L-12V
12 Volt
MODULE
12 Volt
MODULE
SOLAR
POSITIVE (+)
SOLAR
NEGATIVE (-)
(+)
(+)
(
-
)
(
-
)
12V OR 24V NOMINAL
(DEPENDS ON MODEL)
EARTH
GROUND
Figure 6. Solar input wiring.
NOTE:
Higher voltage PV modules designed for on-grid PV
applications should not be used with the SunSaver or
any PWM controller. Only use high voltage modules with
maximum power point tracking (MPPT) controllers.
Connect the solar module(s) to the SunSaver. Refer to the
wire gauge chart on page 30 of this manual for correct wire
size. Use 75 °C copper wire.
If required, the negative solar connection may be
earth grounded. Use appropriate gauge wire and proper
grounding methods for the installation site.
Step 4: Confirm Wiring
Re-check the wiring in steps 1 through 3. Confirm
correct polarity at each connection. Verify that all seven (7)
SunSaver power terminals are tightened.