Thank you for selecting the Merlin Optimized series solar charge controller. Please read this manual
carefully before using the product and pay attention to the safety information. Please preserve this
manual for future reference.
IMPORTANT SAFETY
INSTRUCTIONS
This manual contains all instructions of safety, installation, and operation of Merlin Optimized series controller (referred to as
“the controller” in this manual).
Read all the instructions and warnings carefully before installation.
No user-serviceable component inside the controller. DO NOT disassemble or attempt to repair the controller.
Avoid direct sunlight, high temperatures and DO NOT install the controller at locations where water can get in.
Install the controller at well-ventilated places, the controller’s heat sink will be very hot during the system operation.
Appropriate external fuses or breakers are suggested.
Please cut off all connections of the PV array, fuses or breakers which are close to the battery before the controller
installation and adjustment.
Power connections must remain tight to avoid excessive overheating from loose connection.
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