These are the most common type of battery used in renewable energy systems. They are less expensive than their Sealed counterparts, but require more maintenance. During charging, water is slowly boiled off these batteries. This requires the user to periodically refill the batteries will distilled water. How often these need to be refilled will depend upon how frequently they are discharged, how deeply they are discharged, and the charging voltage used.

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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