Electron ESeries battery charging problem

Hello! I am working with the ESeries module and have been having some some charging issues come up in a significant portion of my outdoor monitoring devices. It has been a difficult issues to nail down, especially since a lot of my devices have been working fine.

I am using OS version 3.0.0 and I have VIN connected to a solar panel and am using a Li-Ion battery. A lot of my devices seem to stop charging despite the panel getting sunlight. Looking at hourly reporting of the PMIC battery state, I see that there are no charging flags. Another oddity is that the PMIC reports drawing from VIN sometimes during nighttime, when there should be no solar power.

Any help would be greatly appreciated!

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