Here is a strange one:
The graph for a day:
Notice the smooth battery discharge before the solar input (smooth and fairly constant) vs after the solar input (heartbeat looking).
So, here is what happens, Whenever the generator charges the battery, the battery discharge smooths out. Then after a solar input cycle, the battery discharge gets this heartbeat (most times). The fluctuation is not much, averages about 19 watts.
Also, if you look at the consumption line it stays relatively constant so to me this indicates some form of self-consumption (almost looks like fans cycling up and down). Firmware for inverter and battery are updated to latest versions.
I understand the solar is undersized (we are working on that), but why the change after a solar cycle?
The question is what might be causing this, do the fans start cycling during the solar cycle and then get "stuck" in some kind of loop that doesn't allow them to settle back down?
This is at a neighbor's place, so I don't have ready access, but any suggestions would be welcome.
A little background - 1-6000xp, 1-indoor Wall mount battery. Currently 6-350'ish watt panels. Weekender for the most part. The heartbeat occurs when they are not around. When they are around, it seems the heartbeat gets lost in the normal daily loads.
It is not that this is a huge load or anything, it is just very disconcerting to see.
Thanks,
JB
