Battery controllers don’t like to have solar power connected without battery power available for its circuits. That calls for a switch on the wire from panel to controller.
While you are at it a battery monitor that continuously displays per cent of full charge is wonderful.
I have been using a low cost eBay monitor for a few years. Works well.
https://www.ebay.com/itm/DC-120V-100A-Battery-Monitor-State-of-Charge-Remaining-Capacity-AMP-Voltage-AH-/182147916411?hash=item2a68dca27b:g:gWUAAOSwyQtVz1vp
The Hall Effect current sensor is a nice innovation making for easy installation and remote display. There is a thread on it in these pages for the Amazon one.