100/20 sometimes stops charging and then carrying on again.

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big-deee asked May 7, '22

100/20 sometimes stops charging and then carrying on again.

Hello together, my 100/20 is charging a 16S-LiFePo4 batterie with 90Ah. It’s running on two 400W modules (mpp at 34V per module) I have seen now for the second time, that the charger just dropped down to 2 ore 3 watt, without a reason. After a wile it starts working again and I am not able to figure it out. I have checked the manual of the charger and made sure, that there is no problem. The settings are right, cable are fine and also not overheating or anything else. Has anyone experienced anything similar and was able to figure it out?

MPPT Controllers charger low power

3cdddffa-4239-4815-a98f-b76183880c0d.jpeg (3.8 MiB)

57544034-c58e-412f-8c9f-91ec0e606683.png (79.9 KiB)

42caf3b5-432f-4831-a602-5d6ee616b05c.jpeg (2.3 MiB)

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Modifications Space

Node Red Space

Answer 1 · 2022-05-07T20:37:31Z

elvis answered · May 07, 2022 at 08:37 PM

Is the BMS turning the battery off? Over voltage maybe.

If the BMS is turning the battery off solar will stop if it has nowhere to go. BMS waits until reset and turns back on, solar starts again.

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Warwick Bruce Chapman commented · May 07, 2022 at 09:46 PM

56.8 a tad high. Drop to 55.8 and see if it’s better?

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big-deee Warwick Bruce Chapman commented · May 08, 2022 at 09:50 AM

Thanks. I will try and give feedback.

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big-deee big-deee commented · May 13, 2022 at 12:03 PM

It seams to be working. Thanks

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big-deee commented · May 08, 2022 at 09:49 AM

As displayed on the picture, the bms has not switched of the charge. That should not be the problem, but thanks for your help.

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