Charging LiFePO4 Must 3024 VPM > 30A from network

Hey, everybody.

I have a Must 3024 VPM and lifepo4 Eve 24V 280Ah with JK BMS


I have a question how can I charge the battery with a current higher than 30A without having solar panels?

Is it possible to connect some power supply instead of solar panels and emulate their work and i can get > 30A?

Maybe there are already ready solutions and you can share them with me.

gizmoboss said:

Hey, everybody.

I have a Must 3024 VPM and lifepo4 Eve 24V 280Ah with JK BMS


I have a question how can I charge the battery with a current higher than 30A without having solar panels?

Is it possible to connect some power supply instead of solar panels and emulate their work and i can get > 30A?

Maybe there are already ready solutions and you can share them with me.

Click to expand...

Seems like you model is limited to 30A AC charging.

Theoretically, you could connect a constant-current power supply to the PV ports, but you would need a voltage above 30v and quite a few amps to get a substantial charge.
Another option would be to connect an external 24v Lifepo4 charger to your battery.

I would say just be patient.

meetyg said:

Seems like you model is limited to 30A AC charging.

Theoretically, you could connect a constant-current power supply to the PV ports, but you would need a voltage above 30v and quite a few amps to get a substantial charge.
Another option would be to connect an external 24v Lifepo4 charger to your battery.

I would say just be patient.

Click to expand...

Thanks for the advice )) So far so good, patience wins out.

I have another question, will it share the charging current from the 30A mains + what it gets through the PV input summarize.
Or are they used one at a time.

gizmoboss said:

I have another question, will it share the charging current from the 30A mains + what it gets through the PV input summarize.
Or are they used one at a time.

Click to expand...

Yes, but only in UTI mode. The charger cannot work when the loads are powered by inverter, so it has to be in bypass mode.

meetyg said:

Yes, but only in UTI mode. The charger cannot work when the loads are powered by inverter, so it has to be in bypass mode.

Click to expand...

WOW, they dont tell you that!!!!!!!!!!!! a deal breaker. for these inverter chargers then.

I want a UPS type set acting as a powerwall (no solar supply). I want to charge lfp bank on night rate (and run my PC load) then run my PC load off batteries on daytime

So I need to switch out the ups to charge with separate charger and also switch PC to run on mains (what about glitches?) , then switch out mains to run PC on battery during the day

Boron said:

WOW, they dont tell you that!!!!!!!!!!!! a deal breaker. for these inverter chargers then.

I want a UPS type set acting as a powerwall (no solar supply). I want to charge lfp bank on night rate (and run my PC load) then run my PC load off batteries on daytime

So I need to switch out the ups to charge with separate charger and also switch PC to run on mains (what about glitches?) , then switch out mains to run PC on battery during the day

Click to expand...

You can try to achieve this by setting output mode to SBU:

Set setting #20 to a voltage that will be relevant to battery voltage after running your loads for a full night.
Set #21 to a voltage that represents a voltage high enough to power loads.
Also set setting #10 to SNU.

You might need to play with setting #20 and #21 to achieve exactly what you want. But this might not be ideal.

In this setup, the inverter will go to bypass and should start charging the battery when voltage drops below #20.

Then it will re-power loads from battery when battery reaches at least #21 voltage.