String Arrangement in 40kW U40 String Inverter

[sivapari1989@gmail.com]

U40 inverter has 3 MPPTs each having 2 strings. I plan to connect 80Nos of 580W Znshine solar panels to the above inverter. But the local supplier and installer informed me to go for 20 panels in each string and 2 strings of each having 20 panels will be connected to one MPPT and rest of other two strings will be connected to other two MPPTs. But I feel it's good to connect 15 Nos of panels to one string then we can get 6 strings each having 15 nos of panel. and that would be good. But when I said this to the local installer, he disagrees with me. Could you please guide me in this please ?