I am planning to instal a 6.6kw system (Risen 315w x 21panels) with fronius 6kw symo inverter as I have three phase.
Due to the roof orientation I have been advised by the installer that he can place 7 panels in North West, 7 panels in East and the remaining 7 panels in West. More panels (1 or 2) can be installed in North West and West side but he is suggesting to go equals (7 each side)
As per the specifications the inverter have 2 Mppt which to me means that it can only handle 2 strings. As per the installer, the inverter can fit 4 strings and in my case there will be only 3 strings, so I don’t have to worry.
Can someone please explain and confirm if it is okay to have panels installed in 3 different directions and there will be no or very less impact on the efficiency.
Also he has given me the option to install 17 panels x 315w (9 east and 8 west). Not sure if that is a better option as during summers West will receive a lot of sunlight and not that much in the east side. Shading is not an issue as it is a double story house with no trees around. My daily electricity consumption is around 24kw ( 60% day time usage). Will a 5.8 or 6kw system be equally good.
Thanks in advance