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eSure™ MPPT Solar Converter Module User Manual (UM1S482000E3)
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Rev. J
17
will adjust its output voltage in small increments so that the current delivered by the module is equal to
the calculated average current per module.
NOTE!
Solar converters will not share load with rectifiers. Solar converters will go into current limit
before rectifiers provide load current.
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Hot Swappable: The solar converter is designed to be plug-and-play. The solar converter can be
inserted or removed from a live DC power system with no damage. When the solar converter is plugged
into the system, the system output voltage will not be affected.
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Cooling: Each solar converter module contains a fan for front-to-back force air-cooling.
a)
Fan Fault Protection: The solar converter module shuts down and its alarm indicator (red) flashes if
the fan fails. Fan failure is detected and reported to controller.
b)
Fan Control: Fan speed is continuously variable. When input voltage is within normal range, the
built-in processor adjusts fan speed according to the solar converter module’s internal temperature
and output power. For example, a higher temperature or output power increases the fan speed.
This feature can be disabled via the controller, allowing the fan to run at full speed regardless of
temperature.
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Paralleling: Up to 30 solar converters can be connected in parallel in one system.
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Communication Failure: The solar converter’s protection indicator (yellow) will flash should it experience
a communication failure. The failure information will be reported to the controller and the controller will
process the failure accordingly. During a communication failure, in order to protect the battery, the solar
converter output voltage will automatically be adjusted as follows. When used with the ACU+ or NCU
Controller, solar converter output voltage goes to the controller’s output voltage setting (this setting is
stored in the solar converter). The solar converter will revert to normal operation once normal
communication is restored.
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Solar Converter Output Current Imbalance: When load sharing severe imbalance (output fuse open) and
the output current drops to zero in average current >10% system, then the red fault indicator will
illuminate.
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Monitoring Function: The solar converter has a built-in advanced DSP that monitors and controls the
operation of the solar converter. The DSP also communicates with the controller in real time through
the CAN bus.
lists the different commands and information exchanged between the solar
converter and the controller.