I just picked up my camper today an Apex Nano , and I am wondering how I shut off the dc power so it doesn`t kill the battery while the camper is parked in my yard?

Some units don't come with a battery disconnect. With everything turned off the lp detector and radio still draw power. You can disconnect the batter or add a battery disconnect.

Mark for now disconnect the battery and when you install a battery switch

Hi Mark, I work at Alpin Haus. You can disconnect the battery, or just be sure the main panel has all the stitches off and the fridge and water pump are off. When you connect the electric it will recharge your battery

Look in your booklet for cut off switch