question

@Yep

A bit more info is needed like what batteries do you have? How DVCC works depending on what the batteries are.

https://www.victronenergy.com/media/pg/2556-GX_Device_Manual_Cerbo_GX/en/dvcc---distributed-voltage-and-current-control.html

And are there any assistants programmed on your inverter?

If you don't have any assistants you can drop your input current limit down to make your solar work harder to charge the batteries

Hi,

Thanks!

The input current limit is on 90A.

I've got 12 OPzV gel batteries, 600 Ah.

'If you don't have any assistants you can drop your input current limit down to make your solar work harder to charge the batteries'

Ok, but that means continuesly adjusting the input current limiter.

I have heared that DVCC has the capability do give the MPPT priority, also in absorption, float and storage..

But it just doesn't work that way except in bulk state.

Hi @Yep

This DVCC 'priority' thing doesn't work for me in regards to Absorb or Float states. And perhaps was never intended to in setups not under Ext Control.

The workaround for me was to set the Multi/Quattro charger's Abs/Float settings just 0.1 V lower than the mppt's. That's not much at 48V, and it will work at lower than that, but the 0.1 V makes it decisive. You could try lower if you had a system V of < 48.

Also, for many people having two charging sources applying Abs at varying times isn't wanted. In that case I'd consider setting both the Quattro's Abs & Float to (say) 0.1 V lower than the mppt Float.

Thanks!

Very interesting suggestion.

MPPT is now (abs/flt) 28,4/27,6 and Quattro 27,5/27,5.

Let's see what happens when the sun is shining.

I'll be back.

Update:

I found two solutions:

1. https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwjDkNiL3oftAhUK-aQKHfR7DxsQFjABegQIBhAC&url=https%3A%2F%2Fcommunity.victronenergy.com%2Fstorage%2Fattachments%2F3299-virtual-switch-ignore-ac-lesson.pdf&usg=AOvVaw2fEUcM2tfawUizAxIkwP7s

2. In the Cerbo Remote Consol: 'DVCC on', put charge current in DVCC to '0 amps', switch Quattro to 'charger only'.

Solution 2 to stop loading from the Quattro via the Cerbo settings was not successful. But, I was able to realize this via the MK3. The 230V now goes directly to the output and the solar panels now charge the batteries. As soon as the sun starts to shine more, I switch to solution 1.

Hi Alexandra,

Thanks (and a bit late).

DVCC is 'on' en there are no assistants.

Batrteries are Sonnenschein Gel 24V, 600 Ah.

I can put the limiter down but then I will loose sunshine.

I have tried several solutions now.

Most of them block solar and only gridpower provides me with power.

I am looking for a configuration which only prioritises solar.

Thanks in advance.

Hi @Yep

What kind if system is this?

Cerbo GX, Quattro 5000, MPPT 150/35, Gel, 12 x 2v 600 Ah.

Anyone an idea?

Try to connect the MPPT to a different terminal on the battery bank than the Quattro. The MPPT sees the Quattro charging voltage as the bank voltage. In my own setup where there are 2x Quattro's 8000 and 2x MPPT 150/70 and a Skylla-i I had the same situation ,the Skylla-i always stayed in float while the Quattro was charging, I also ran a voltage detection cable to different posts on the bank, it is a shame that the MPPT's don't have that possibility, and also set the voltages off the chargers a little bit offset by 0.1v.

Hi Ed,

Thanks!!! The MPPT is already connected to the batteries away from the connection of the Quattro. I also tried different voltage settings but no succes. I hpoe that Victron will find a solution. Hopefully they will respond.

Cheers,

Yep

Just received an e-mail from Victron (excellent Sunday service).

In fact it's a problem which can't be solved.

The power from the Quattro is too high compared to the MPPT power.