Charge settings for 48v of Lithium.

[Daley]

I have 4 x 12v battle born 100ah connected in series.

I have a LV 5048 all in one charger/inverter.

What should I set the charge settings at with these lithium batteries?

 

[nwillitts]

charge @56.5v @40 amps should be ok.54.4v will be a full charge.
jasonhc73 may know more.
i have the same mpp.

 

[John Frum]

According to the manual "Bulk/Absorption For your Bulk/Absorption stage, the ideal voltage is between 14.2v-14.6v. For full charge and balance, the absorption mode should be set to last for at least 20 minutes per battery (for multiple batteries in parallel). Float Our batteries do not need a float stage for charging, but a float voltage between 13.4V and 13.8V can be used when connected to shore power."
14.2 x 4 = 56.8
14.6 x 4 = 58.4
In this video the CEO of BB advises to charge the batteries to full so that they can balance.

I'm just some guy that can run a calculator.

 

[Supervstech]

charge @56.5v @40 amps should be ok.54.4v will be a full charge.
jasonhc73 may know more.
i have the same mpp.

My math shows a full charge as 58.4 v

3.6v per cell


3.2v per cell is nominal voltage at 51.2v

longest life should be around 3.4 v per cell... or 54.4

 

[Supervstech]

Here is the page linked in he photo.

 

[Supervstech]

The annoying thing about this chart is it is in Ah... and 3.6 shows same info as 3.7, 3.8, and 4.2v...

but the Wh would be higher as the battery voltage increased...

 

[Supervstech]

The annoying thing about this chart is it is in Ah... and 3.6 shows same info as 3.7, 3.8, and 4.2v...

but the Wh would be higher as the battery voltage increased...

In 48v arrangement...
3.4v = 122.35Wh
3.5v = 125.95Wh
3.6v = 129.54Wh
3.7v = 133.14Wh
4.2v = 151.13Wh

 

[John Frum]

Further down in the manual

"Series Up to four BB10012 batteries may be connected in series to increase the voltage of the system up to a 48V system. When batteries are mounted in series, current capacities remain the same, but the system voltage is additive. Two BB10012 batteries mounted in series to form a nominally 24V system should be charged using a bulk and absorption voltage of 28.8V, and a float voltage of 27.2V. Four BB10012 batteries mounted in series to form a nominally 48V system should be charged using a bulk and absorption voltage of 57.6V, and a float voltage below 54.4V."

14.4 x 4 = 57.6
14.4 / 4 = 3.6

 

[jasonhc73]

LV5048 Setup

ONLY FOR - NEW Battleborn batteries.

• Maximum charging, I have mine set to 20 amps, but you can easily do 100 amps with new Battleborns (the built in BMS cuttoff is 100 amps +/- 5% for 30 seconds).
  • Program 02 on the panel
• Battery type: User
  • Program 05
• Maximum Utility Charging @ 10 Amps - 60 amps, This means if there is no solar, just grid power to the batteries. New can easily handle 60
  • Program 11
• Back to discharge (49-58) Set it to Ful or 58,
  • Program 13
• Are you tired of that panel beeping yet?
  • Program 18 (bOF)
• Bulk charging voltage (C.V. voltage) - 58.4V (I would do 57.6Vif I bought them, the BMS builtin to the BattleBorn will cut-off at 58.8)
  • Program 26
• Float charging voltage - 53.6V - (The self-dischargerate is so low that you really don't even need to float them)
  • Program 27
• Equalization setting - Disable
  • Program 33 - (EdS)

Direct from the CEO -

This picture is just an example, it is NOT setup for NEW Battleborn. (This is my setup for used BYD packs)

 

[nwillitts]

jason,what do you have your BYD batteries set at?

 

[jasonhc73]

jason,what do you have your BYD batteries set at?

The screen shot shown.

 

[nwillitts]

sorry-did not see that-thank you.

 

[Daley]

Thank you so much for all your replies!

Where did you get your version of software used in the screenshot? I downloaded the software but it won’t let me have user defined battery as an option. I suspect I have an older version?

Also does anyone know why I cannot get the utility/shore power to charge?
It shows up as an icon and 124v and 60hz but I cannot get it to charge the battery bank, even when using the setting for utility charging only.

 

[Supervstech]

Further down in the manual

"Series Up to four BB10012 batteries may be connected in series to increase the voltage of the system up to a 48V system. When batteries are mounted in series, current capacities remain the same, but the system voltage is additive. Two BB10012 batteries mounted in series to form a nominally 24V system should be charged using a bulk and absorption voltage of 28.8V, and a float voltage of 27.2V. Four BB10012 batteries mounted in series to form a nominally 48V system should be charged using a bulk and absorption voltage of 57.6V, and a float voltage below 54.4V."

14.4 x 4 = 57.6
14.4 / 4 = 3.6

Yup.
My math was on 3.65v per cell.

 

[John Frum]

Contact BB directly, provide them with the charge controller you are using and they will give you the information. They have answered all my questions within a day, sometimes the same day. Great company.

I just quoted the manual which is pretty clear and unambiguous on the subject.
Do you think BB support will say something different?

 

[jasonhc73]

Thank you so much for all your replies!

Where did you get your version of software used in the screenshot? I downloaded the software but it won’t let me have user defined battery as an option. I suspect I have an older version?

Also does anyone know why I cannot get the utility/shore power to charge?
It shows up as an icon and 124v and 60hz but I cannot get it to charge the battery bank, even when using the setting for utility charging only.

https://usa-mpp-solar.com/manuals/Software/WatchPowerV1.13SP3(latest)/

If that no longer works, I have it all saved also.

 

[Daley]

That’s the one I downloaded but it seems to lack the custom battery option for me.

 

[nwillitts]

did you c

That’s the one I downloaded but it seems to lack the custom battery option for me.
[/QUOTE

did you create new password for the software?

 

[jasonhc73]

administrator

log-in,

Or, use the front panel on the unit.

 

[Daley]

I tried administrator password but didn’t help. I’ll try setting a new password.
Front of panel doesn’t have all the same features as far as I can tell, like data logging.