If you have a device that can draw a lot of amps like an inverter or battery charger you need to attach the wires directly to the battery terminals.
How to connect solar panels to battery rust.
Connect the positive wire from the solar panel to a battery cable with a fusible link between the battery and the solar panel.
In the event you have more than one battery connect them in parallel.
Now install an or switch near the blocker and splitter.
This will help prevent a fire or battery explosion in the event of a short in the wiring.
The same voltage of 13 8 from the charge controller can charge all the battery connected in parallel.
Connect one socket from the splitter and one from the blocker.
When the sun goes down and the solar panels stop working the branch will no longer send a signal and the blocker will switch over to let the battery power through.
Charge controller to battery and loads.
Connect the negative wire of the solar panel to the negative terminal of the battery.