Hi Mrrkva,
That depends on how the installer wired it. Get a meter. Measure the voltage at the battery bank when you KNOW charging is happening. Note it down. Then turn off the battery disconnect switch and check the battery voltage again. If it has dropped then you will have your answer.
Do you know how many watts the panel is?
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.