PWM input voltage, Xantrex C40 test video
here is the Video link, the fluke is plugged directly into the Solar panel drop wiring before it enters the controller right above the panel input protection fuse, that i use for a disconnect just c...
Forum Discussion
In this case the actual battery vs panel voltages are not what count.
"Battery voltage" should be "controller out voltage" (about I volt higher than battery) to compare with "panel voltage" and that should be "controller input voltage" There is a standing 0.4 loss across the controller itself.
So looking at the earlier morning results, IMO the controller is doing its proper closed switch thing and then it gets very close to the Bulk setting 14.5v at controller output and it should then start its one hour of Absorption before dropping to Float.
With Mr Wiz' battery draws during the afternoon it might not drop to Float? If so, what do you call it after the hour at Absorption is up?
"Battery voltage" should be "controller out voltage" (about I volt higher than battery) to compare with "panel voltage" and that should be "controller input voltage" There is a standing 0.4 loss across the controller itself.
So looking at the earlier morning results, IMO the controller is doing its proper closed switch thing and then it gets very close to the Bulk setting 14.5v at controller output and it should then start its one hour of Absorption before dropping to Float.
With Mr Wiz' battery draws during the afternoon it might not drop to Float? If so, what do you call it after the hour at Absorption is up?
