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This is my system: 3 slots Solar panels 7,4 Kwh||3 Chinese MPPT 30A||Multiplus 48/3000/3kwh||CCGX||BMV-700||2 Pylontech 4,8Kw 100A
I would like to replace the MPPT with Victron models (also to directly view the work of the solar panels on the CCGX).
I don't know if it is necessary to buy 3 MPPTs for the 3 panel slots or I can install a single more performing one.
Can you recommend the most suitable choice and the relative MPPT?
Thank you
Put the panel specs into the Victron online calculator. It will recommend suitable MPPT(s)
https://www.victronenergy.com/mppt-calculator
Ok, I've tried, but I'm not able to produce a useful result.
Assuming a model, perhaps I would need n. 3 BlueSolar MPPT 150|35 but I was wondering if it was possible to accumulate the charges of the 3 panel slots (3 slots for 9 solar panels = 27 total) in a single more performing MPPT.
Anyway these are the specs of the panels:
27 x 300W is 8100W of solar. 27 is also an interesting number to configure. How are they set up now? how many series how many parallel? Do you want to reconfigure them?
8100w on a 48v system is about 168A of charge at STC. (Watts is Volts multiplied by Amps, or W=V*A)
Your solar panel data does not have temperature co efficient ~(so i have left it default) on it and I do not know where you live. I have set up the data for an RS 450/200 - panels configured 9s one on each tracker - with one spare. you can change where you live and temperatures for your area. and please check the data I entered.
You could buy:-
1x 450/200 and reconfigure your panels and protective fusing and switch gear (9 in a string on each tracker)
3x 150/60 (3 series - 3 parallel - 9 panels on each) if you don't want any peak shaving. Again check the information.
Thank you very much for the explanation and the report.
My plant is located in Rome. I wonder if 3 mppt 150/35 are not enough (also to save money). Then, how do I connect 3 Ve.Direct cables to the CCGX to graphically display solar production?
I was wondering how much actual gain (beyond the undisputed quality) I can bring to the system if my 3 current Chinese MPPTs to replace are these:
Those mppts can charge at 60A at 48v. Or at least that is how i understand that sticker.
Faster tracking is also an advantage of the victrons. I have tried quite a few mppts from various brands, other than the very cool monitoring from Victron, higher yeilds. Batteries are charged way sooner.
The 150 or 250/60 is your best option without throwing away solar power.
Try swap one out for now and see.
Thank you very much for the calculations and explanations, I learned a lot and came to this reasoning.
For each of the 3 groups of panels (3 series 3 parallel) 100V/30A outputs which can be connected to 3 charge regulators (e.g. n.3: MPPT 150/35) or to (n.1: MPPT 150/100- MC4) which has 3 entries.
The difference lies in the possibility of making the MPPTs communicate with the CCGX, because of the 3 smaller charge regulators only one can connect via VE.Direct, otherwise I have to choose n.3: 150/70 Tr. VE.Can, which can communicate with each other and with the CCGX, but with an increase in expense.
It's correct?
