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Hello,
I am planning to build a PV system with 16 modules in combination with MultiPlus 2 and an 48V battery.
My modules have the following specifications:
My Plan is to connect 2 strings 4s2p to an MPPT 250/60-MC4, is that possible or do you suggest something different?
Thanks in advance!
Hi @peak
With just one 250/60, you will have effectively a 4S4P arrangement. 4x parallel strings of 10.71 Isc will exceed the total allowed of 35. So no, that's not possible.
A 250/85 or 250/100 have a 70A allowance, and either would work. The 100A model better suits your total solar wattage though. Still a little short in theory, but in practice would be a good match.
You could also consider more than 1 mppt, especially if your panel strings aren't all orientated the same way.
Hi @JohnC,
thank you for your answer!
The panels have the identical orientation, but I could also imagine using two smaller MPPTs to have a better failsafe. Which MPPT would you recommend for a 4S2P then?
Thank you!
