question

Carlos Carvalho avatar image
Carlos Carvalho asked

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
2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

6 Answers
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.



2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

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.

2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Carlos Carvalho avatar image
Carlos Carvalho answered ·

Is there a way to configure that alarm?

2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

davidtudor avatar image
davidtudor answered ·

Did you sort this low battery error, I've just update both my RS 450/100 to latest V1.16 and now getting low voltage alarm, this only happens when i plug in my car to charge once the generator kicks in the low voltage error clears. But I didn't have the problem before I updated the firmware

2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

delf67 avatar image
delf67 answered ·

You're using a generator to charge an EV?

2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

davidtudor avatar image
davidtudor answered ·

yes i use a generator to charge 2 electric vehicles

2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Related Resources

Additional resources still need to be added for this topic

Additional resources still need to be added for this topic

Battery Compatibility

Did You Know - How to create a battery profile for non-Victron batteries?