Originally Posted by pteck
Thanks guys, that helps a lot.
Also a great point about battery SOC. Am I right that the input/output of the controller is as much dependent on the SOC of the battery as the sun? So if the battery was say 80% full, the controller won't be maximizing the output of the panels?
Indeed, once the battery gets "full" the charger will cut back. Some of them "burp charge" the battery. They totally shut down for a while and then go full bore (where that's maybe 7A) rather than tapering back and running 1 or 2A forever and ever. Turn on some sort of load if you want to see what the "full output" of the charger is.