This is really a question for Victron. I have 2 150/60 mppts hung off 2 banks of 5 triplets. So 30 panels giving me between 75 and 100 volts from each bank of 15 panels. I think we all know by now that these chargers do not play well together in parallel, so I'm thinking of swapping them out for one unit that can cope with both banks of panels. Any suggestions?
I note from another thread you also have a CCGX and a BMV. The newer smart networking is an alternative to what you have now, but won't be useful concurrently. Even if you had bluetooth.
What you're seeing really doesn't matter much (if at all, maybe if the Absorb programs don't match), but you could consider invoking DVCC to minimise this. With both mppts using the same-sourced Voltage and Temp sensors they should target the exact same V. And you could terminate Abs with the Current reading from the BMV, so both should finish Abs together.
https://www.victronenergy.com/media/pg/CCGX/en/dvcc---distributed-voltage-and-current-control.html
If they are smartsolar, have you tried smartnetworking them? Also, why specifically do you say they are not working well together?
It's actually been discussed here quite a bit, if I remember correctly. The output from each mppt varies wildly. Also, once the batteries get to about 85% the one charger simply goes into absorbtion leaving the other to do all the charging. The history shows a difference daily of some 10-30% between the chargers. I've not heard of smartnetworking. Will have to look it up. Is it something new? My chargers are 6 years old.
Maybe worth exploring it and with the firmware updates you may be able to. It is not suited to all setups, but it explains much of it here. https://www.victronenergy.com/media/pg/VE.Smart_Networking/en/synchronised-charging---further-details.html You can check hardware compatibility here. https://www.victronenergy.com/media/pg/VE.Smart_Networking/en/limitations.html The calculator https://www.victronenergy.com/mppt-calculator can help you find a right match for your panels. Without more specific details, I can only hazard a guess that a 250/100 may be close, but the amps temps etc. has to also be considered so the calculator is the best way forward.
Hmm. Just looked it up. It looks like I have to spend 150€ on 3 dongles for the blue solar mppts and the bmv700 before I even start. Then all would be synchronised, correct?
Thanks both. So I enable DVCC and all will be well. My concern was mostly that half the system is getting hot while the other half is resting. I wonder if default settings in DVCC will do? I'll have a look.
Enabled DVCC. Now both chargers are giving me 2kw, but one's in bulk and the other absorbtion.
Be patient, see what happens..
Oh. Since enabling DVCC the muppets and the BMV have vanished from the Victron Connect app on my phone.
