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Hi there...can anybody explain this repetitive charging wobble I noticed today that occured exactly every 9 minutes. I include 2 screenshots. The first an overview and the second zooming in on the wobble. Needless to say there was nothing obstructing the panel, full sunshine with no cloud, no aircraft and load disconnected etc. The large singular momentary dip on the overview shot was the one legged seagull arriving for breakfast!
Any thoughts?
Image Caption
at which charging state is your battery at this moment?
Perfectly normal for the mppt to do a scan every 10 minutes or so, searching for a higher power output.
The mppt adjusts its power output by varying the current it draws from the array.
A trends graph of the pv voltage and current will show the current being increased and decreased while searching for a higher output. The pv voltage bounces up and down in response to the varying current.
