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Old 10-06-2015, 07:37 AM   #1
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Short of Normal Draining?

I've noticed that my charge controller is blinking every morning, indicating that the battery is charging, or in need of some charge, even though the controller light indicates a full charge the night before. Is it natural for an AGM battery to drain a bit at night, or is this an indication that I have a short, or does my controller consume enough from the battery each night that its consumption is what is causing the light to blink? The AC power is switched off and there are no DC circuits within the trailer (clock, timing, etc.) that that is not switched to OFF.

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Old 10-06-2015, 08:06 AM   #2
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Considering that a solar panel doesn't charge at night, it is normal that there would be a slight drain overnight since you're using some electricity at night that isn't being replenished by the solar panel until the next morning.

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Old 10-06-2015, 10:11 AM   #3
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It depends on the specific charge controller and how it is designed, and a little on how it is installed.

For example, my Blue Sky MPPT charge controller has a green light which comes on each morning when there is enough light to activate the panels, and then it blinks and flashes in some pattern depending on the need to charge. It goes off at night when it is dark.

So, I would say what you have is normal, but each charge controller is a bit different. I would not worry about it at any rate.
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Old 10-06-2015, 01:33 PM   #4
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Thanks to both!
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