Change grid charging current from 30a to 20a

[Vard0]

Hi. 

I am a noob looking for some advice please.

I have a Must 5kva inverter connected to 4x 200ah lead acid batteries and 6x 260w panels (3x3).

The batteries don't last on a full cloudy day so I would like to be able to charge the batteries through a 4kva generator if possible but at the moment the inverter seems to draw too much power for the gennie to cope.  The inverter keeps switching from grid to offline mode.

At the moment the grid charge is set to 30 amps.  My question is, can I reduce this to 20 amps to see if the gennie will handle it better and will that be enough amps to charge the batteries in a reasonable time?

Thanks

 

[Coulomb]

17 hours ago, Vard0 said:

I have a Must 5kva inverter

Commiserations. I hope it works well enough for you.

17 hours ago, Vard0 said:

4kva generator ... My question is, can I reduce this to 20 amps

Yes, you can. But that 20 A is on the battery side, so it will only be some 1000 W. 30 A is around 1500 W, which you would expect would be no problem for a 4 kVA generator.

It's more likely that the inverter is rejecting the waveform quality (perhaps the frequency, or the frequency stability) of the generator output. Try the lower setting, but you might have to get a different generator with either a better governor, or preferably a generator that has an inverter built into it.

[Vard0]

4 minutes ago, Coulomb said:

Commiserations. I hope it works well enough for you.

Thanks Coulomb

I appreciate the advice.  Good to know that the gennie capacity shouldn't be an issue.  I'll check to see if I can change the output of the gennie.