Victron MPPT 100/30 X 2

[xsilvergs]

I have two Victron MPPT 100/30 Smart Solar chargers which are networked and work, today while unable to do anything (the specialist said rest) I sat in the van and looked at how the two solar setups performed. I noticed that MPPT_A uses the BMV for external current sense and MPPT_B doesn't.

Can anybody explain why there is a difference?

 

[SquirrellCook]

I have three networked and found just one monitoring the current. Interesting.

 

[wildebus]

I have three networked and found just one monitoring the current. Interesting.

I don't know but it might be that the syncing between the MPPTs themselves might share what the Current is meant to do?

The Voltage information will change the voltage the controllers would put out
The Temperature information will change the voltage the controllers puts out

The Current information is slightly different as the purpose of that is I think to tell the Controllers to change state to Float Mode at the appropriate time - and I think it is the charging mode that is the key thing that gets sync'ed between the controllers - I guess the one controller that receives that current info is the master MPPT? It would be interesting to see if that receiving controller changes at the start of each day when they all wake up again?

 

[SquirrellCook]

From what I quickly read last night, is that the first to wake up will get to be master. As Betty hasn't been driven more than a couple of metres for a long time I haven't seen a change. It'll need turning soon, so if I remember to note the current master I'll see if it changes.

 

[xsilvergs]

I use an RPi instead of a GX device, recently I've made a few changes/installs to my setup, changing to the "Large Image" which includes Node-Red and also swapping the 3 for a RPi 4. Through some of the changes settings have been lost.

Last night I enabled DVCC About DVCC which by default enables shared voltage and temperature sense. One result is this:

@wildebus this morning the Solar Chargers started like this:

Controller B has 2 50W mono panels in series, controller A has 2 175W mono panels in series. Neither pair were shaded.