Obviously a newby here, I have 28 390 W Canadian solar panels and would like to know if I can connect them to my smart solar MPPT 250/100 in 7 strings of 4 connected in series.
The Isc is 10.17 A
Voc 48,2 V
asked
MPPT 250/100 Tr Maximum 390W panels
Hi @jumboswart
The maximum string Isc for the 250/100 is 70 A, so 7x strings would exceed that. 6x would be ok.
Consider 4x of those strings into the 250/100, and adding a 250/85 for the other 3x strings. That would be a far better match at charging V's.
I'm all for having extra panels to allow for bad weather, but that's a lot of panels on a single mppt..
I didnt mention that I also have a SmartSolar MPPT 150/100, could I then say put 4 strings on the 250/100 and 3 on the 150/100?
Yeh, and you have ~200A of panel power at charge V. Don't want that much?, don't install it.. :)
Much appreciated, will trade the 150/100 for the 250/85 and put 4x4 and 3x4 on the system
Another question maybe a stupid one. I now have 2 x 250/100 MPPT's that I have connected 28 x 390W panels 4 in series and 7 strings, 4 strings to one and 3 to the other. My question is why at peak hours am I only producing 6500W?
I have a Freedom Won 30/24 LifePO4 battery connected as well as a generator on remote start
https://www.victronenergy.com/mppt-calculator
https://www.victronenergy.com/upload/software/VE-MPPT-Calc-4_0.xlsm
An important thing to know is the battery voltage.
The 250/100 can charge the battery with up to 100A -> 1200W at 12V, 2400W at 24V and 4800W at 48V
I have a freedom won 30/24 lipo4 battery with a nominal voltage of 52 V, min 47 V, max 56 V
