question

Carlos Carvalho avatar image

Solar Charger - MPPT 450/100 - low battery voltage alarm

Using a Solar Charger - MPPT 450/100 couple with two Quattros 8000 48V and connected to a li ion 12S battery bank with a voltage range of 41-48.60V .

Once the voltage reaches around 47.50V the Solar Charger - MPPT 450/100 fires an alarm Low batt. voltage alarm: Alarm .

Why is that the case and how to get it switched off?

Lithium Batterybatteryalarm
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3 Answers
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Carlos Carvalho answered ·

Is there a way to configure that alarm?

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Carlos Carvalho avatar image
Carlos Carvalho answered ·

The alarm is from the MPPT and continues during evening. The BMS is not giving any errors and cells are balanced.

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Paul B avatar image
Paul B answered ·

well more research by your self is needed I think.

I do suspect the main reason to be that your batteries BMS is turning off the battery ie maybe due to a inbalanced cell inside, ie one cell in the bank is going over its set high limit. thus the battery goes off and the Smart solar sense that and reports or the inverters do and report it,

Ie if the inverter draw is lite then the mppt would supply the power need to keep the inverters from shutting down, but a large voltage dip may occur thus the low voltage allarm

its not a O there is only one reason so some diagnostics on your part to rule out issues needs to be done.

or you have a incorrect alarm setting somewhere

is the alarm from the solar unit or from the multiplus or from the battery monitor.



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