I'm about to fit some new
solar panels and a
Wind generator to my existing system and I'm confused on the bast way to go.
I currently have 4 x 110 watt
panels into a 30amp
MPPT controller.
I'm intending to fit a D400 which has it's own controller and dump resistors.
I also have 2 x 275 watt
panels I intend to add as well.
My initial thoughts are
Leave the existing panels and controller alone.
Install the D400 on it's own controller
Get 2 x 20 amp controllers and put each new panel on its own controller as 20 amp controllers are
cheap, it gives me redundancy, if one panel is shaded the
then the other is still ok.
So here is where I get confused. Can multiple controllers co-exist? Would one controller sense the higher charge voltage being put in by one controller and then think that the
battery is charged to a higher level than it is, and then effectively either switch off or go float?
How do I set it up so all controllers put in the maximum they can without getting confused by the other controllers, or do I have to go to one big mother of a controller? Is there some sort of sense diode I have to put in between the controllers?
Ideas?