2 things, one already mentioned.
Run a charge line. Numerous ways to do this, hit Google and pick the one that works best for you.
Make sure your Even Brake doesn't have an air leak, mine was cycling every 5-6 minutes just sitting in the driveway. Never noticed it 'till I was doing some work nearby with the door open after hooking it up. Roadmaster replaced it under warranty but it took 45 days for them to ship me a reman box back.
I've had issues with phantom braking with both boxes but since I already own the box I'll stick with it a while.