How to get victron battery monitor and JBD BMS to read same %

Simi 60 · Sep 12, 2022

sunshine_eggo said:
Is it because you have NEVER fully charged the battery?

Well, it did get fully charged while doing the initial top balance while on a bench.
But yes, I see what you are saying.

I need to be brave and get out the Victron USB dongle
I never did the initial settings as then, I didn't have one but the electrician who did the install and big wire connections did.

sunshine_eggo · Sep 12, 2022

Simi 60 said:
Well, it did get fully charged while doing the initial top balance while on a bench.
But yes, I see what you are saying.

Yep. Until the BMS sees the 16S @ 3.5V+, it's not going to show 100%.

Simi 60 said:
I need to be brave and get out the Victron USB dongle
I never did the initial settings as then, I didn't have one but the electrician who did the install and big wire connections did.

Multiplus?

Simi 60 · Sep 12, 2022

sunshine_eggo said:
Yep. Until the BMS sees the 16S @ 3.5V+, it's not going to show 100%.

Multiplus?

8s3p
And yes to the multiplus
5000/24/120

Will need to double check what setting be put into the Midnite Classic 150 as well

sunshine_eggo · Sep 12, 2022

The aforementioned 28.4 absorption and 27.2 float should do the trick.

Simi 60 · Sep 13, 2022

A new day.
Ran Genset and punched batteries up to 27.2 and float kicks in but as it's a sunny day, we still have 90 amps coming in from solar while Genset remains running
This has been going for over 30 minutes now

It seems at this stage the Midnite Classic 150 was set with a higher cutoff than the multiplus.
Will be interested to see if we get to 3.5v & 100% now.

Simi 60 · Sep 14, 2022

Ok, so seems the Midnite classic and solar gets the batts to 100% and I hit sync when they did

Of interest is the multiplus seems to have a glitch where it won't go to bulk charge if batteries register higher than 26.??v
With Genset running it would put them on float.

Multiplus not bulk charging - VictronEnergy

community.victronenergy.com

sunshine_eggo · Sep 14, 2022

Simi 60 said:
Ok, so seems the Midnite classic and solar gets the batts to 100% and I hit sync when they did

So are the two devices in agreement now? Expect them to drift over time.

Simi 60 said:
Of interest is the multiplus seems to have a glitch where it won't go to bulk charge if batteries register higher than 26.??v
With Genset running it would put them on float.

Multiplus not bulk charging - VictronEnergy

community.victronenergy.com

Thanks for that. I had no idea, and it explains some things I've experienced with my Quattro. My Lithium-NMC battery has "odd" voltage compared to lead-acid and LFP. Now I know to set the float way high to force bulk charging.

Goboatingnow · Sep 14, 2022

sunshine_eggo said:
The passage of time can only make it worse. Battery monitors need to periodically be set to a known SoC. Victron states "a couple times a month."

You will never get Soc readings to agree unless each device usually exactly the sane methods to calculate and reset Soc. forget about it.

Simi 60 · Sep 16, 2022

sunshine_eggo said:
So are the two devices in agreement now? Expect them to drift over time.

.

Close enough
Victron says 73%
Batts say 71%
I can live with that and thank for the help.

How to get victron battery monitor and JBD BMS to read same %

Simi 60

New Member

sunshine_eggo

Happy Breffast!

Simi 60

New Member

sunshine_eggo

Happy Breffast!

Simi 60

New Member

Simi 60

New Member

Multiplus not bulk charging - VictronEnergy

sunshine_eggo

Happy Breffast!

Multiplus not bulk charging - VictronEnergy

Goboatingnow

Solar Enthusiast

Simi 60

New Member

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