White Papers

  • Advantages of Morningstar’s DC Coupling vs AC Coupling

    Providing a simple, cost-effective battery backup PV solution has eluded solar PV manufacturers and installers for years. Morningstar has developed a 600VDC Direct Charge Controller Transfer System which will provide G-T solar PV customers with more cost effective options than have been available before.

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  • Heat Dissipation of the TriStar & TriStar MPPT Controllers inside Enclosures

    This paper shows how to calculate the heat dissipation for Morningstar’s TriStar (PWM) and TriStar MPPT controllers. With this information, system designers can make good decisions regarding thermal management and system design when installing Morningstar controllers inside enclosures.

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  • Morningstar’s TrakStar™ MPPT Technology & Maximum Input Power

    Morningstar’s MPPT controllers have a very wide voltage input range which supports a large variety of modules in off-grid battery charging systems. This document addresses solar module sizing, power ratings, and some of the more frequently asked questions about your module choices.

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  • Parallel Charging Using Multiple Controllers With Separate PV Arrays

    Large off-grid and battery backup PV systems, can require more charging than a single controller can provide. Learn how TriStar™ or TriStar MPPT™ controllers that are connected to their own separate PV arrays can be wired in parallel to a battery bank to meet the charging requirements of these large systems.

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  • Retrofitting Backup Power to a String Inverter System

    The vast majority of grid tie PV systems are useless when grid failures occur. They shut down at the very time that the electricity generated on site is most needed. However, a variety of power electronics and energy storage solutions can be deployed to ensure that a PV array does not become stranded during utility outages.

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  • Sizing Benefits of MPPT Controllers with Nominal Voltage Arrays

    The tracking capabilities of many MPPT controllers require a voltage input window that must be significantly higher than battery voltage. Morningstar’s MPPT controllers, on the other hand, are engineered to impose no such limitation, and in many cases, we encourage these configurations for the optimal performance and cost benefits.

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  • Traditional PWM vs Morningstar’s TrakStar™ MPPT Technology

    Morningstar’s MPPT charge controllers use the TrakStar advanced control MPPT algorithm to harvest maximum power from a Solar Array’s peak power point. Besides this extra charge capability, there are several other advantages of MPPT over PWM technologies that are outlined in this whitepaper.

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