Hello, I have the mppt 150/70 was going to use this for an array on the roof of rv. Have a couple of 88 w panels that I was going to use as a suitcase array. I don’t need a big controller for the second but the small mppt’s don’t have a can port to daisy chain to the 150/70. What options do I have to make the suitcase communicate with the normal controller. Thank you