Ubiquiti SM-SW-40 operation manual
SolarSwitch
4x PoE Smart MPPT Charger
Model: SM-SW-40
Introduction
Thank you for purchasing the Ubiquiti® SolarSwitch™ MPPT
Charger. This Quick Start Guide is designed to guide you through
installation and includes the warranty terms.
Package Contents
SolarSwitch NTC Thermistor H4 Connector
1U Bracket Ferrules
(Qty. 6)
Removal Tool
Installation Requirements
• Flathead screwdriver
• Ferrule crimper or pliers
• 18-14 AWG wires for battery connectors
• 24V or 2x12V SLA, AGM, or Gel lead battery
• Solar panel with H4 connectors (10 - 60V open circuit voltage)
• Shielded Category 5 (or above) cabling should be used for all
wired Ethernet connections.
• We recommend that you protect your networks from
harmful outdoor environments and destructive ESD events
with industrial-grade, shielded Ethernet cable from Ubiquiti
Networks. For more details, visit: ui.com/toughcable
Hardware Overview
System
LED
Battery and NTC
Thermistor Terminal
Ethernet
Ports
PV Panel
Terminal
PV Panel
Terminal
Reset
Button
Power
Terminal
Output
Note: NTC Thermistor must be connected in order for
the battery to charge.
Interface
System LED
Description
Steady on when system is powered on;
Red when battery polarity is reversed.
Press and hold the Reset button for 10
seconds to restore factory default settings.
Press and hold the Reset button for 16
seconds if:
Reset
Button
• The device does not respond to a factory
reset.
• The web interface is unreachable.
• There doesn't appear to be any other
noticeable activity.
Battery and
NTC Thermistor
Terminal
Power Terminal
PV Panel Terminals
Ethernet Ports
Output LED
Terminal block for NTC Thermistor and
battery. (NTC Thermistor must be connected
in order for the battery to charge.)
Two-pin terminal block for power (24VDC out)
H4 connectors for solar panel
Maximum open circuit voltage 60V
Supports 10/100 Fast Ethernet connections
and passive 24V, 2-pair PoE output.
Steady on when output power is enabled.
LED
Hardware Installation
Note:
Prior to use, it is recommended to write down the
factory default password for this device. The password can
be found on the sticker located underneath the SolarSwitch.
Rack Mounting
1. Attach the 1U rackmount bracket (included) to either side of
the SolarSwitch.
2. Mount the SolarSwitch to one of the side rails in your rack.
3. Remove the four-pin connector from the battery terminal block.
4. Crimp a ferrule on one end of the wire.
5. Insert the crimped wire into the appropriate slot on the
four-pin connector. Using a flathead screwdriver, secure the
wire to the connector by tightening the screw until it stops.
6. Repeat steps four and five until the connector is fully occupied
with all four wires.
7. Connect wires and NTC Thermistor to batteries.
Note: The battery will not be charged without
connecting the NTC Thermistor.
24VDC
NTC
Thermistor
NTC
Thermistor
Note: Use SLA, AGM or Gel Lead batteries.
8. Attach the NTC and battery cable using the four-pin connector.
9. Attach the PV panel cables.
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