I'm feeling a bit confused by all this solar elektrikery stuff, but I'll stick my oar in here. I have 2 arrays also, and at most times its the doggies. However, like as mentioned above, one controller takes president and t'other goes AWOL or float. In a nutshell though, I have been advised by an expert (un named of course) that my settings are OK. My 2 arrays are 400wts and 335Wts both into their own controller. As has been mentioned I concur, that this set up is indeed very handy for mooring along trees/buildings and their shading. So I say, go for it.