solar panel setup question to transport energy from external source to the battery?
so I have 2 x 100w panels to a controller
the controller has a 12v battery and the load.
I would like to know a way to use a portable powerbank or something that I can topup the 12v battery connected to the controller
I wouldnt want to disconnect the battery from the circuit or anything.
is there anything out there that would do this and how to connect it to the current setup
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