Morningstar SI-300-115V User manual

300 Watt Pure Sine Wave Inverter
S
URESINE-
300
Installation and Operation Manual
Model DC Input AC Output
SI-300-115V 12 Vdc 115 V @ 60 Hz
SI-300-220V 12 Vdc 220 V @ 50 Hz
SI-300-220V 12 Vdc 220 V @ 60 Hz
1098 Washington Crossing Road
Washington Crossing, Pennsylvania 18977 USA
email: [e-mail]
website: www.morningstarcorp.com

2
Table of Contents
1.0 Safety Notes......................................................3
2.0 Overview ...........................................................4
3.0 Installation.........................................................5
4.0 Operation.........................................................11
5.0 Protections ......................................................12
6.0 Maintenance....................................................13
7.0 Warranty..........................................................14
8.0 Technical Specifications..................................15

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1.0 Safety Notes
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important safety, installation and operating instructions for
the Morningstar SureSine-300 Inverter.
The SureSine produces voltages and currents capable of causing severe injury
or death. Extreme caution must be taken when installing and using the SureSine.
The following symbols are used throughout this manual to indicate potentially
dangerous conditions or important safety instructions.
WARNING: Indicates a potentially dangerous condition.
CAUTION: Indicates a critical procedure for safe and proper
operation of the SureSine. Use extreme caution when performing
this task.
NOTE: Indicates a procedure or function that is important to the
safe and proper operation of the SureSine Inverter.
General Safety Information
Read all of the instructions and cautions in the manual before starting the
installation.
Ensure that battery power has been disconnected BEFORE installing,
servicing, or removing the SureSine Inverter.
Do not allow water to enter the SureSine.

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2.0 Overview
1. AC Output
Terminals
2. Remote Meter
RJ-11 Jack
3. DIP Switches
4. Remote On/Off
Terminal Contacts 6. Inverter Status
LED
5. AC Output
LED
7. 12V Battery
Input Terminals
8. Earth Ground
Terminal
Figure 1
1. AC Output Terminals –Wiring location for AC output
2. Remote Meter Jack –Communication port for Morningstar Remote Meter or
PC Communications**.
3. DIP Switches –Four switches to adjust operating parameters
4. Remote On/Off Contacts –Connection points for remote On/Off switch or
jumper wire
5. AC Output LED –Displays operating status of AC output
6. Inverter Status LED –Displays operating status of the SureSine
7. 12V Battery Input Terminals –Wiring location for 12V lead-acid battery input
8. Earth Ground –Wiring location for earth grounding or chassis grounding
** Adapter required, not included. See Morningstar website for more details.

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3.0 Installation
Required Tools:
Wire cutters / strippers
Drill and 1/8” (3 mm) drill bit
Philips and Flat-head screw drivers
Required Parts (not included):
3A AC in-line fuse
100A DC in-line fuse
Toggle switch (if remote switch is used)
STEP 1 - Mounting
Locate the SureSine on a surface that is protected from direct sun, high
temperatures, corrosive fumes, and water. SureSine may be mounted
horizontally on a flat surface (like a table) or vertically (on a wall). Do not install in
a confined area where battery gasses can accumulate.
Place the SureSine on the surface where it will be mounted and determine where
the wires will enter/exit. Be sure there is sufficient bending room for the wires and
other auxiliary connections. Verify that the mounting screws will not penetrate
wires or other objects located on the opposite side of the surface. With a pencil
or pen, mark the mounting hole locations
With a drill and 1/8” (3 mm) bit, drill pilot holes for each of the four mounting
screw locations marked on the mounting surface.
Place the SureSine onto the surface and align the mounting feet holes with the
four pilot holes. Use the included #10 screws to secure the SureSine to the
surface.

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STEP 2 –Setup
LVD Warning Beeper
DOWN: Beeper ON
UP: Beeper OFF
Power Mode
DOWN: Always On
UP: Standby
LVD
DOWN: 11.5 V
UP: 10.5 V
Comm. Select
DOWN: Meterbus
UP: Modbus
UP
DOWN
Figure 2 DIP Switch Functions
DIP Switch 1 - Power Mode
Select the desired power mode. In the Always ON mode, the inverter provides
continuous AC output. Standby mode is an energy saving mode. When an AC
load greater than 8W is detected, the AC Output is automatically turned on.
When the total load falls below 8 Watts , the AC Output is automatically turned
off to conserve energy. Loads are detected in one (1) second or less.
Down Position: Always ON (factory default)
Up Position: Standby Mode
DIP Switch 2 –Low Voltage Disconnect
Select the Low Voltage Disconnect (LVD) and Reconnect (LVR) setpoints.
Down Position: LVD = 11.5V, LVR = 12.6V (factory default)
Up Position: LVD = 10.5V, LVR = 11.6V
DIP Switch 3 –LVD Warning Beeper
Enable or disable the LVD audible Warning Beeper.
Down Position: Beeper Warning ON
Up Position: Beeper Warning OFF
DIP Switch 4 –Communications Select
Specify the desired RJ-11 communication protocol. Select Meterbus for
Morningstar remote meters and other Morningstar products. Select Modbus
protocol for PC communications. An adapter is required (not included)
Down Position: Morningstar Meterbus (factory default)
Up Position: Modbus Protocol

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STEP 3 - AC Wiring
3A FUSE
EARTH
GROUND
AC DEVICES
WHITE
BLACK
12
3
4
Figure 3 AC Wiring Diagram
WARNING: Complete all AC wiring BEFORE connecting a battery to
the DC input to avoid contact with AC voltage.
CAUTION: AC loads should not exceed 300W continuous (600W
surge). Exceeding these ratings could damage the inverter. Observe
AC output voltage and frequency markings on the SureSine. Be sure
AC loads are compatible to avoid damage to loads and/or inverter.
NOTE: The AC output is isolated, therefore AC line and neutral are
interchangeable. Use UL Listed 12AWG (4 mm2) black wire for AC
Line and UL Listed 12AWG (4 mm2) white wire for AC Neutral. The
earth grounded leg defines AC Neutral.
AC power cables are not supplied. Use the appropriate wire color for each AC
connection as shown in figure 3.
1. Wire a UL Listed 12AWG (4 mm2) black AC Line wire to AC loads or
distribution panel as shown in figure 3.
2. Insert a 3A in-line fuse in the AC Line wire as shown in figure 3.
3. Connect the AC Neutral wire to the AC device(s) or terminate at a
distribution panel using UL Listed 12 AWG (4 mm2) white wire.
4. Wire the white AC Line wire to earth ground. Check local code for
appropriate earth grounding requirements.

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STEP 4 - Remote On/Off Switch
AC Output
ON
Figure 4 Remote On/Off Wiring Diagram
NOTE: If a Remote On/Off switch is not desired, install a jumper across
the Remote On/Off terminals to fix AC output on (or in standby mode).
A jumper is taped to the SureSine Lid for convenience.
A remote switch can be installed to switch the SureSine AC output on/off from a
remote location allowing the SureSine to be installed in an inaccessible location
or enclosure. A single-pole, single-throw switch (SPST) is required (not included).
1. Using a small gauge wire (max. 1.0 mm2or 16 AWG), wire one terminal of
the Remote On/Off terminal block to one end of a SPST switch.
2. From the other contact on the switch, wire another small gauge wire to the
remaining open terminal on the Remote On/Off terminal block.

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STEP 5 - DC Wiring
CAUTION: DO NOT CONNECT THE BATTERY TO THE
SURESINE ON THIS STEP!
CAUTION: Use nominal 12Vdc input only. Exceeding the 15.5V
maximum input voltage may damage the inverter.
CAUTION: Use UL Listed wire only. The Earth Ground conductor
(green) must be larger gauge than DC wiring.
+
-
EARTH
GROUND100 A
FUSE
1
2
3
4
Green
Red
Black
Figure 5 DC Wiring Diagram
DC power cables are not supplied. Use UL Listed wire only; rated for the voltage,
current, and wire length needed for the system. Minimum wire gauges have been
recommended. Use the appropriate wire color for each DC connection as shown
in figure 5.
For safety, wire in the following order:
1. Wire Earth Ground as shown in Figure 5 using UL Listed 4 AWG (25
mm2) or larger green wire. The Earth Ground conductor must be larger
than the battery power conductors.

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2. Wire 12V battery negative to the negative DC input terminal using UL
Listed 6 AWG (6 mm2) or larger black wire.
3. Connect the 12V battery positive cable (red) to the DC input positive
terminal on the SureSine using UL Listed 6 AWG (6 mm2) or larger red
wire.
4. Wire an in-line fuse in the positive battery cable (red) no further than
12” (305 mm) from the Battery positive post. Do not connect the
battery positive cable to the battery at this time.
STEP 6 - Check Wiring and Power Up
+
-
EARTH
GROUND
100 A
FUSE
3A Fuse
AC Output
ON
WHITE
BLACK
RED
GREEN
BLACK
Figure 6 Complete System Wiring Diagram
1. Review steps 2 through 5. Double-check all wiring and connections.
2. Verify that the battery is wired with correct polarity to the SureSine.
3. Connect the Battery + cable (red) to the positive battery post.
WARNING: Connecting the battery to the SureSine will cause a spark at
the point of connection. There is a RISK OF EXPLOSION in hazardous
areas or locations where explosive gases have accumulated.
4. The SureSine STATUS LED should turn on Solid Green indicating
successful start-up and no faults.
5. If the jumper is installed or the Remote On/Off contacts are closed, the AC
Output LED will turn on Solid Green after a few seconds delay. If jumper is
removed or the contacts are open, the AC Output LED will remain off.
Note: In Standby Mode, the AC Output LED will turn on for a few
seconds after start-up. If no AC load exists, the SureSine will
transition to Standby Mode and the AC Output LED will blink Green.