Hello Everybody,
I have to redo my holiday’s home offgrid system. I plan to install two different panels. One is a 24v/375W (41.48V open circuit), the other is an array of two 12v/120w/24.1v open circuit panels noires in series.
Since those two setups are quite different, question is: can I link both to a SmartSolar MPPT 150/70 MC4 (and the MPPT will handle both as two separate lines)? Or I have to use two different MPPTs?
Consider that my plan is to have then everything connected to an inverter. I was considering a Multiplié II GX, but if I need a second MPPT, then I will consider an EasySolar II GX.
Thank you in advance!
The mppt is only 1 tracker.
It is best practice to get separate mppts for differing strings.
I am not saying it will not work, if the VOC of the strings are similar and the tracking amps in operation.
1 Like
The rules for combining different panels is
In series they have to have similar Imp (max power current).
In parallel they have to have similar Vmp (max power voltage).
Check your Vmp and Imp.
Have a look at this calculator which does different sized panels. You would have to enter your 2x120W panels as one 240W panel.
Thank you for your time. That was not the question, tough. I will connect in series two identical panels. Then I will complete my system with a different panel, with totally different specs. My question was: can the two MC4 connector in the MPPT 150/70 MC4 handle this (so there are two separate lines and will work) or those two lines are basically the same connection, thus I have to have two different MPPTs anyway?
Correct. A common bus. One tracker.
1 Like
This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.