Continuing, Part 2. Have to correct myself already, 5 controllers not 6. Anyway, yes I am wasting power (800 watts)on the input to the Midnight Classic but I have available a high amp DC Buss (16 amps at 120vdc) for other uses, think resistive, universal motors and such, a different topic. Next up is a EPever MPPT it is a small one, only 40 amps output, again only enabled in winter. Now this one is fed by 5 225 watt 30 volt panels all in parallel, this overloading of the input is entirely wasteful, 1100 watts in and I can only get (40x12.8) 500 out. I am going to replace this 40 amp mppt in the future with at least a 60 but it is what it is for now. That explains 3 controllers, the last 2 controllers are Morningstar C60, PWM controllers, fantastically built controllers, The rest of the panels are divided between these 2 controllers and they like the xantrex controller run all year. Again these PWM controllers are being used wastefully, fed 30 volts to charge 12 I know what you are thinking, how much power I am not utilizing, but understand those PWM controllers were less than half the cost of something like the Midnight Classic and much more durable. My system developed over time and with funds available not how I would build from scratch, but it all works fine for me. I ballpark my actual available power potential at roughly 3500 watts from the panels or 250-270ish amps DC. My system will improve as over time I will switch out my PWMs for good quality MPPT for use in the winter.