Introduced by the Electronic Industries Alliance (EIA) in 1983, EIA-485 is an alternative to RS-232 point-to-point serial communication. It supports multiple devices on a signal bus up to 1200m(4000ft) in length and uses differential signaling, making it less susceptible to external interference. EIA-485 is primarily used in commercial and industrial applications.

Traditional PWM vs Morningstar’s TrakStar™ MPPT Technology


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:


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