Max charge current with or withouth Weak AC enabled.

Question

question

luppensg asked Mar 22, '24

Good day,

I cannot find information about the consequences on the DC charge current, when Weak AC is on or off.

On my Quattro 48/10000-140, when Weak AC is enabled, the maximum charge current is as low as 75A (instead of 140A) ! Is this normal?

The power factor (on the generator) only drops from 0,99 to 0,86 so I would not expect a drop in charge current like that.

Thanks

quattro 10kva

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Answer 1 · 2024-03-22T17:05:38Z

derrick thomas answered · Mar 22 at 05:05 PM

Yes that is normal. Weal ac input uses different pfc algorithms.

3

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Alexandra ♦ commented · Mar 23 at 04:42 AM

Weak AC by nature means it can't support the max charge current wanted. Since it will collapse in voltage and frequency. Or PF as mentioned.

So yes, very expected. The system is doing what you told it to.

It can eventually ramp up to full charge current if the source allows it to without distortion of the waveform.

1 ·

luppensg Alexandra ♦ commented · Mar 23 at 02:28 PM

Hi Alexandra,

Thanks for this information!

Can I say that, if Weak AC is activated, but the incoming waveform is very good, the inverters will again ramp up the chargecurrent?

So the PF is dynamic?

Thanks a lot.

0 ·

derrick thomas luppensg commented · Mar 23 at 02:55 PM

No. As long as weak AC is selected, the inverter will continue to use the alternate algorithm, which will reduce available charge current.

0 ·