Multiplus low temperature cutoff

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rocketmanmonaco asked Dec 19, '21

Multiplus low temperature cutoff

Hello,

On my MotorHome, I have:

Smartshunt (w/ temp cable)

A couple of Smart Mppt’s

CCGX (DVCC turned on)

Multiplus 12/3000 (set to Lithium batteries)

My concern is low temperature charging, the mppt’s are not charging below 41F (my setting), I have verified that.
I am trying to verify if the Multiplus will or won’t charge at 32F or 0C. I seem to find all kinds of different opinions.
Do I need some extra wires and assistants to stop charging- I would prefer to not charge below 41F, but I am not sure how to make that happen.

Thanks for your help.

MultiPlus Quattro Inverter Charger

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Modifications Space

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Answer 1 · 2021-12-19T20:21:29Z

snoobler answered · Dec 19, 2021 at 08:21 PM

I would presume the GX shares the smart shunt data with the MP, but I wouldn't take it for granted. Experiment by setting it to a temperature higher than it actually is, and see if the unit will charge.

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Answer 2 · 2021-12-20T01:40:15Z

rocketmanmonaco answered · Dec 20, 2021 at 01:40 AM

Thanks snoobler,

I finally found that setting in my iphone app on VictronConnect in the Demo settings.

However, when I connect to my MultiPlus with the MK3-to-USB adapter to make changes to the "charger" setting, There is no "Low Temp cut-off" or even a "temp Compensation" box. I did check the Update software and it says the software is up-to-date.

Does this mean I need the Bluetooth adapter for the Multiplus to change this setting? (And can you have booth the Bluetooth adapter and a VE.Bus cable plugged in and running at the same time?)

Thanks to anyone that can help.

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Answer 3 · 2021-12-20T02:17:28Z

snoobler answered · Dec 20, 2021 at 02:17 AM

To use Victron Connect, you need the bluetooth adapter.

The only way I think I could accomplish it in VEConfigure is through assistants, and that's complicated.

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Jeffery and Carolyn commented · May 31, 2022 at 02:54 PM

We have a Quattro with after market lithium batteries, CerboGX, and a BMV-712. Can I assume that we can also use the above information to stop the Quattro from charging below a certain temperature?

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snoobler Jeffery and Carolyn commented · May 31, 2022 at 03:45 PM

Hopefully, your aftermarket batteries have their own built-in cold temp charging protection.

Options:

Update Quattro firmware to current version that allows low temp charging protection and enable in VictronConnect.
Learn Assistants and VEConfigure to implement an assistant to prevent charging at low temps.

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Answer 4 · 2021-12-31T01:08:25Z

rocketmanmonaco answered · Dec 31, 2021 at 01:08 AM

Just to let anyone else who finds this post know, the Demo Library for the Multiplus was used with a MK3-to-USB adapter and then I used Windows 10 VictronConnect (Not Victron Configure).

Still have not got it all solved yet... but I figured I would help anyone find the correct path.

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Answer 5 · 2021-12-31T05:51:08Z

snoobler answered · Dec 31, 2021 at 05:51 AM

I lost track of this thread. The low-temp charging protection option wasn't added until a recent firmware version. If your firmware is not up to date, you won't have that option.

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