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Vision SP 12-200 LifePO4 Battery Charge Settings


Wentzel
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Good day, 

 

I am new to this forum and need some help. 

I bought a Must 3Kw 24v inverter which have a build in 80A MPPT charger. The charger can charge 20-30A from the utility. I don't have any PV panels as yet. My goal is to beat loadshedding with a manual changeover switch. 

I need to set up the inverter to charge the batteries optimally. The battery datasheet doesn't specify the settings to be used. This is where all the clever people comes in. 

I have 2x 200Ah batteries in serie at this stage. The battery specifications are as follow: 
Cell: 3.2V-100Ah

Normal Voltage: 12.8v

Capacity 200Ah

Cell Groupings: 4S2P

Maximum charge current: 50A

Discharge cut off voltage: 11.2v

Charge Voltage: 13.6 ~ 13.8v

 

My inverter has the following charge settings that I can set up: 

Maximum charging current (total charging) (80A Default) 

Maximum utility charging current (20A default) 

Bulk Charging (CV Voltage) (28.2v default) 

Floating charging voltage (27v Default) 

Low DC cut off battery voltage (20.4v Default)

Battery stop discharging voltage when grid is available (23.0v Default) 

Battery stop charging voltage when grid is available (27.0v Default) 

 

What is the recommended values on the above settings? Any assistance will be greatly appreciated. 

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47 minutes ago, Wentzel said:

Maximum charge current: 50A

 

47 minutes ago, Wentzel said:

Maximum charging current (total charging) (80A Default) 

a mismatch right there...

 

48 minutes ago, Wentzel said:

Charge Voltage: 13.6 ~ 13.8v

 

48 minutes ago, Wentzel said:

Bulk Charging (CV Voltage) (28.2v default) 

and again...

set max current to 50A and bulk voltage to 13.8 X 2 = 27.6V or maybe 27.4V even...

50 minutes ago, Wentzel said:

Discharge cut off voltage: 11.2v

 

50 minutes ago, Wentzel said:

Low DC cut off battery voltage (20.4v Default)

and one more... 22.4V would be more appropriate...

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  • 5 months later...

Hi Wentzel, how are those batteries holding up? I'm hunting for another battery, bought mine from Manhattan Computer Solutions but didn't have enough at the time for a second battery, and now I can't find any stock of it (not even internationally). But I'd really like to know what your overall experience has been with it so far...

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