question

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ares1 asked

Mppt 150/35 float stuck problem

Hello I have 250watt x2 panels in series. I have 4×220 Ah battersea (total 880 Ah). I folow my battery voltage from BMV 700 monitör and also from the mesurment device on my inverter. Now both shows 11.7 Volt . My problem is during night time when the mppt is off I see same volt on my mppt application in my phone. So normally the morning it should be bulk but in a very short time it goes float since it shows 13.8 Volt float voltage limit. From settings I increase float limit to 14 volt . In a second it is ön float volt showing batteries voltage 14 volt I again decrease 13.8 volt and system shows 13.8 and remain float. What could it be the reason stucking in float mod?

MPPT Controllers
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1 Answer
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wkirby answered ·

When the MPPT Voltage is reading 13.8V or 14V, what Voltage does the BMV read?
I suspect there is a bad connection somewhere between the MPPT and the battery.

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ares1 avatar image ares1 commented ·

11.75 volt

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