The charge controller should come with specific instructions on how and in what order to connect everything. You should not have anything connected to charge controller if battery is not connected.
On most controllers, you connect battery first. Then connect solar panel(s). Now you can safely connect the load. Between each device and battery can be circuit protection of your choice. ie fuse or breaker. You will kill a charge controller if not following instructions from manufacturer.
On most controllers, you connect battery first. Then connect solar panel(s). Now you can safely connect the load. Between each device and battery can be circuit protection of your choice. ie fuse or breaker. You will kill a charge controller if not following instructions from manufacturer.
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