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    MPPT Controllers

    MPPT stands for Maximum Power Point Tracking.

    What does this mean to you?

    Increased Energy Harvest

    What is a MPPT controller?  This is a solar charge controller which operates a solar panel at its point of ‘maximum power output’ rather than at the battery voltage which significantly increases the energy you can harvest from a solar panel.

    For example, you will find that the ‘maximum power output’ for a nominal 12V solar panel occurs at around 17V which is higher than the voltage range of 10-15V in a non MPPT controller will operate in.  So a panel is not operating at its point of ‘maximum power output’ and some of the energy production potential is being lost.  Using a MPPT controller ensures that a solar panel operates at its point of ‘maximum power output’.  Energy harvest can be increased by as much as 30% using an MPPT controller.

    Use of High Voltage Panels

    With an MPPT controller the solar panel voltage can be significantly higher than the battery voltage so allowing the use of;
    - a wider range of solar panels for battery charging including high voltage modules designed for grid connect systems, and
    -  solar panel arrays with a higher voltage than the battery systems they are charging.   For instance the maximum combined solar panel Open Circuit Voltage (Voc) for the Outback FLEXmax80 is 150V when charging 12V, 24V, 36V, 48V or 60V battery systems.

    Easier and Cheaper Cabling

    By running a solar panel array at a higher voltage there is the possibility of reducing cabling costs to achieve the same voltage drop. For instance, if you had 4 x 135W, nominal 12V panels each producing about 7.5A, with a cable run of 10m from panel to controller the cable sizes required to keep the voltage drop to less than 2% for different voltages would be;

    • 12V – 50mm²
    • 24V – 16 mm²
    • 48V – 4 mm²

    Summary

    The benefits of MPPT technology are;

    • an increase in energy harvest from solar panels.
    • the use of high voltage panels in battery charging applications
    • the use of smaller cable sizes to achieve a required voltage drop. 

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    Morningstar SunSaver MPPT Controller - (#SSMPPT)

    The SunSaver MPPT controller features a smart tracking algorithm that maximizes the energy harvest from the PV and also provides load control to prevent over discharge of the battery. 

    • Epoxy encapsulated for environmental protection
    • 4 stage charging
    • Can be used with solar arrays up to 75V to charge 12V or 24V battery systems
    • Maximum efficiency up to 97.5%.
    • Optional Remote Meter available to display system performance

    Maximum solar panel current - 15 amps

    Maximum Load Current - 15 amps

    Maximum Solar Panel Open Circuit Current,  Voc - 75V

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    Morningstar Tristar MPPT Controller - (#TSMPPT)

    Morningstar’s TriStar MPPT solar controller with TrakStar Technology™ is an advanced maximum power point  tracking (MPPT) battery charger for off-grid photovoltaic (PV) systems up to 3kW.

    The controller provides the industry’s highest peak efficiency of 99% and significantly less power loss compared to other MPPT controllers. 

    The TriStar MPPT features a smart tracking algorithm that maximizes the energy harvest from the PV by rapidly finding the solar array peak power point with extremely fast sweeping of the entire I-V curve.

    This controller is the first PV controller to include on-board Ethernet for a fully web-enabled interface and includes up to 200 days of data logging.

    • Nominal System Voltage 12, 24, 36 or 48 volts DC
    • Max. Solar Open Circuit Voltage 150 volts DC

    2 versions available,
    TS-MPPT-45

    • Maximum Battery Current 45 amps
    • Nominal Maximum Solar Input; 12 Volt 600 Watts, 24 Volt 1200 Watts, 48 Volt 2400 Watts

    TS-MPPT-60

    • Maximum Battery Current  60 amps
    • Nominal Maximum Solar Input, 12 Volt  800 Watts, 24 Volt 1600 Watts, 48 Volt 3200 Watts

    A Remote Temperature Sensor is included with the units.

    Maximises energy Harvest

    • Recognition of multiple power points during shading or mixed PV arrays
    • Parallel circuit design provides less stress and longer life for electronic components
    • Extensive electronic protections including PV short circuit protection
    • Peak efficiency of 99%
    • Low self-consumption

    Extensive Networking and Communications Capabilities
    Enables system monitoring, data logging and adjustability. Uses open standard MODBUS™ protocol and Morningstar’s MS View software.

    • Meterbus: communications between compatibleMorningstar products
    • Serial RS-232: connection to a personal computer 
    • EIA-485: communications between multiple devices on a bus
    • Ethernet: fully web-enabled interface to a local network or internet; view from a web browser or send email/text messages.

    Metering and Data Logging

    • Optional TriStar meter and remote meter provide detailed operating data, alarms and faults.
    • Three LEDs display system status
    • Up to 200 days of data logging via meters or communications ports

    THE PICTURE SHOWS THE TRISTAR MPPT WITH OPTIONAL METER DISPLAY UNIT.

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    Outback FLEXmax 60 and 80 MPPT Controllers - (#FMAX)

    Outback FM60 60 amp controller and FM80 80amp controller.

    • For charging 12V, 24V, 36V, 48V or 60V battery systems
    • Can be used with solar arrays up to a combined open circuit voltage (Voc) of 150V.
    • Maximum output current FM60 - 60amps, FM80 - 80amps
    • Maximum solar array FM60 - 12V systems 750 Watts, 24 V systems 1500 Watts, 48 V systems 3000 Watts, 60 V Systems 3750 Watts
    • Maximum solar array FM80 - 12V systems 1000 Watts, 24 V systems 2000 Watts, 48 V systems 4000 Watts, 60 V Systems 5000 Watts
    • Power conversion efficiency, typical; FM60 - 98.1%, FM80 - 97.5%
    • Programmable Auxiliary Control Output
    • Built-in backlit display shows status information at the touch of a button.
    • Enhanced network communications allow the FLEXmax 80 to be remotely programmed via the optional MATE system display and controller.
    • FM60 - 40 x 14 x 10 cm (13.5” x 5.75” x 4”)  - (H x W x D)
    • FM80 - 41.3 x 14 x 10 cm (16.25” x 5.75” x 4”)  - (H x W x D)
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