As my previous post stated, even if you have a pv array of lets say 2p4s and the pv panels ISC Amp rating is 15A then that means that 30A is connected to the mppt, now the mppt can only request 12A(firmware dependant, my multi rs does not limit at 12A, I donot have the latest firmware) the remaining potential 18A remains as potential energy in the panels, the mppt cannot request more than its limit. Look at the attached screenshots from VMR, look at 11days ago 4100W at 276.93V that equals 14.85 Amps, also 16 days ago 4015W at 271.93V that equals 14.76Amps. It have been working like this since 2 January.
my panels ISC rating is 14.4 Amps. The ratings on your panels is under test conditions, In real life you will encounter certain atmospheric conditions that permits your panels to “over produce” .
That makes total sense to me, but why does Victron in a mail tells me NO (and in the training video is also a NO). Why also did they change from 13A to 12A? I hope somebody from Victron will also comment and give us the answer
Can you please tell us what firmware version you’re using? Because I checked the firmware changelog and nowhere I’ve read anything about input current limit changes.
Also 4100W at 276.93V indeed equals 14.85 Amps, but if you have 2 PV arrays connected (one on each MPPT), then I guess the 4100W is the sum of both arrays, isn’t it? So the voltage on each MPPT is around 277V, but only 2050W per PV array (which is only 7.42 Amps then).
Tbf I don’t know the software, maybe it is just a single MPPT shown in the screenshot. Please let me know.
and I have the older model multi rs with one mppt tracker, come to think of it - thats probably the reason I am getting more amps per mppt. I remember when the dual tracker multi rs came out, the power was 3000W per tracker, and my single mppt is 4000w
found a old data sheet for the single tracker multi rs. 18Amp pv input limit, and indeed in the data sheet of the dual mppt it is 12 Amps I also see the short circuit current is 16A vs 30A
based on this (old) newfound information I would rather suggest you keep to Victrons specification for warranty purposes.
It would be really nice if someone could tell me what the real maximum PV input current per MPPT is for the Multi RS Solar 48/6000.
If it is still around 13A, I would buy the Multi RS Solar 48/6000 now. But if it is actually just 12A or even lower, then I have to go for another setup.
