Specific to MPPT controllers, this is the maximum solar power the controller is able to convert to usable charge power without significant losses.  This is determined by the by the nominal system(battery) voltage and the charge controller’s maximum current rating.

Traditional PWM vs Morningstar’s TrakStar™ MPPT Technology

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Tech Support Policy

TriStar MPPT Processor A Firmware Update

v32b Firmware and above addresses EEprom access bugfix causing watchdog trip and subsequent lowside FET turn on.  This issue is generally limited to Controllers installed in applications utilizing all, or most, of the following items in the design.  -High I/O of Communications, -Read/Write of vb_ref register (0x0033), -Read/Write of ib_ref register (0x0058), -Write of battery current limit (0xE01D), -Coil command restart of controller, -48V Systems, -Oversized Arrays.  The following link provides instructions on updating firmware:   https://www.youtube.com/watch?v=J6Duwr5Tl-w&t=10s

 

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