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Morningstar ProStar Controller – Gen 3


  • High reliability – latest electronic and environmental protections, quality control, and design considerations comply with IEC 62109 and promote longevity in the harshest environments.
  • High Temperature Design – full nameplate current rating, both solar and load up to 60°C continuous.
  • Auto-battery-select – 12V and 24V systems.
  • Data Logging – up to 256 days of solar charge and load consumption data.
  • Low Noise Design – meets US Federal Communications Commission Class B specifications.
  • Automatic Solar Based Lighting Control – field adjustable, multi-event load control enables powerful options for solar lighting systems.
  • MODBUS Communications – open standard MODBUS communications protocol allows for control and remote data access.
  • Durable Design – high strength polycarbonate case with protective terminal cover and extruded aluminum heatsink.
  • Self Diagnostics – continuous monitoring and reporting of any errors or system faults through its status LED’s, optional display and communication port.
  • Meter – high resolution LCD, multi-lingual backlit graphical display of system voltage, current, temperature, lighting settings, etc.
  • Custom Programming – dip switches, meter interface, or connection with a computer can be used to adjust charging, load, communications, and lighting control.


Other Benefits

  • Estimated 15 year life
  • Compliance with IEC 62109
  • PWM series battery charging (not shunt)
  • 8 dip switches to adjust battery charging and other settings
  • High resolution graphical meter to adjust settings and display logged data
  • RJ-11 MeterBus port for serial MODBUS data or to add a remote meter
  • Compatible with Morningstar’s Ethernet MeterBus Converter (EMC-1)
  • Up to 256 days of data logging
  • Dusk-to-dawn and advanced programmable lighting control
  • Protective terminal cover
  • Enhanced surge rating for heavy DC loads
  • Self-diagnostics
  • Slow switching mode to eliminate system noise at telecom sites
  • Parallel for up to 300 amps
  • Temperature compensated charging
  • Tropicalization
  • No switching or measurement in the grounded leg
  • 100% solid state
  • Very low voltage drops
  • Current compensated low voltage disconnect (LVD)
  • LED’s to indicate battery status and faults
  • Capable of 25% overloads
  • Remote battery voltage sense terminals


Morningstar ProStar 15amp w/-MeterMorningstar ProStar 30ampMorningstar ProStar 30amp w/-Meter
Nominal Battery Voltage12V or 24V
Battery Voltage Range10-35V
Voltage Accuracy<= 0.1% +/- 50mV
Maximum Battery Current15A or 30A
Maximum Solar Input Voltage (12V/24V bat)60Voc
Load Current Rating15A or 30A
Self-Consumption20 mA*
LED Indications(1) status, (3) Battery state of charge
Transient Surge Protection1500 Watts (solar, battery, load)
Operating Temperature-40°C to + 60°C
Meter Operating Temperature-20°C to + 60°C
Storage Temperature-40°C to + 80°C
Humidity100% non-condensing
Tropicalizationconformal coating, marine-rated terminals
Resolution128 X 64 pixelsNo meter128 X 64 pixels
Viewing Area5.0 cm x 2.5 cm5.0 cm x 2.5 cm
Display ColorBlue on whiteBlue on white
Battery Charging
Battery Types7 Standard Battery Settings + Custom
4-Stage ChargingBulk, Absorption, Float, Equalize
Temperature CompensationCoefficient: -5 mV / °C / cell (25°C ref)
Range: -30°C to + 60°C
Set Points: Absorption, Float, Equalize
Dimensions15.3(W) x 10.5(L) x 5.5(D) cm
6.0(W) x 4.1(L) x 2.2(D) in
Weight0.4 kg / 1.0 lbs
Wire Size RangePower Terminals: 2.5 – 16 mm2 / 14 – 6 AWG
Battery/Temp. Sense: 0.25 – 1.0 mm2 / 24 – 16 AWG
EnclosureIP20, Type 1
Electronic Protections
Solar Inputoverload, short-circuit, high voltage, reverse polarity, high temperature, nighttime reverse current
Load Outputoverload, short-circuit, high temperature, reverse polarity
Batteryreverse polarity (no battery removal)
Load & Lighting Control
Low Voltage Disconnect, Low Voltage Reconnect Settings11.4 V / 12.6 V or Custom (x2 for 24 volt systems)
Lighting SettingsDusk to Dawn or Custom
LVD Current Compensation-20 mV per Amp @ 12 Volts / -40 mV per Amp @ 24 Volts
LVD Warning Timer10 minutes
Lighting Test Timer5 minutes
Data & Communications
Communication PortMeterBus
Communication ProtocolsMorningstar MeterBus, MODBUS
DataloggingUp to 256 days, daily records
PC SoftwareMSView
CE; RoHS; ETL ListedUL62109/CSA.107.1; IEC 62109; FCC Part-15 class B compliant
Manufactured in a certified ISO 9001 facility


Product NameDescription
Remote Temperature Sensor (RTS)The RTS is recommended whenever the temperature of the battery varies more than 5°C (9°F) during the year.
Remote Meter (RM-1)Morningstar’s Remote Meter (RM-1) is a universal, four digit display with custom icons that is compatible with several Morningstar controllers and inverters. This meter provides comprehensive system information for easy monitoring including voltage, current and temperature.
PC MeterBus Adapter (MSC)Morningstar’s PC Meterbus Adapter (MSC) converts a controller’s meter port (RJ-11 phone type connector) to a standard RS-232 serial connector for connection to a PC or other equipment. The MSC may be used with any Morningstar controller or inverter equipped with a meter connection that does not also already have a RS-232 port.
USB Communications Adapter (UMC-1)The USB MeterBus Adapter (model: UMC-1) converts the Morningstar MeterBus RJ-11 electrical interface to a standard USB 2.0 interface which allows communication between a PC and a Morningstar charge controller or inverter .
Ethernet Communications Adapter (EMC-1)The New Ethernet MeterBus Converter (model: EMC-1) enables IP based network and internet connectivity to any Morningstar product that features an existing MeterBus port (RJ-11)
Meter Hub (HUB-1)The MeterHub allows up to 15 Morningstar products on a single MeterBus network. The product electrically isolates devices that supply power to the network, preventing damage to the network in the event of grounding problems. Five status LED’s indicate the proper network connection to each port. The MeterHub is suitable for either wall or DIN rail mounting.
Relay Driver (RD-1)Morningstar’s RelayDriver™ is a logic module which provides high level system control functions such as high/low voltage alarms, load control and generator start.
Ground Fault Protection Device (GFPD-150)Morningstar’s Ground Fault Protection Device products are built to provide a superior solution to ground fault protection for both off-grid and on-grid PV systems. The GFPD products’ are available in two model versions (GFPD-150V and GFPD-600V) to support 150V and 600V PV system breaker stacks.