You need to have.
How to charge 12v battery with solar panel.
To charge a battery with a solar panel connect a charge connector to the solar panel.
How to connect a solar panel to a 12v battery.
3 step to charge battery with solar panel.
It is important to wire.
For an effective charge you need to make sure that the panel is directly facing the sun and no obstacles in between.
Divide the wattage of the solar panel by the voltage of the battery to get the number of amps your charge connector needs to handle.
Connect the solar panel to the charge controller.
Connect the battery cable to the charge controller.
In the first step you are going to wire the battery to a charge controller.
The short answer is in most cases depending on the size of the battery it will take around 5 8 hours to fully charge a 12 volt car battery with a solar panel that can produce 1 amp of current.
Then run wires from the battery to the charge connector making sure to match the positive and negative poles.
Connect solar panels to charge controller.