Carlos Melim Posted September 5 Share Posted September 5 (edited) Good morning, everybody. I have a PV System with 100 un 550W modules but with two orientations: 1 string with 20 modules, orientation 1 (20 modules) 4 strings with 20 modules, orientation 2 (80 modules) The 5 strings are divided in three arrays: Sub-array 2 with orientation 1: PV Array and Sub-array 1 with orientation 2: For I have two orientations, I want to use the multi-MPPT and Power Sharing features. I have 5 strings but I can find only 4 or 6 MPPTs inverters. Assuming I choose a 40 kW 4 MPPTs inverter: If I connect the 5 strings to 3 MPPTs inputs the Power Sharing feature will not work. The inverter MPPT inputs are not complete. If I connect the 5 strings to 4 MPPTs inputs the Power Sharing feature will not work. The inverter doesn´t have enough MPPT inputs. Assuming I choose a 60 kW 6 MPPTs inverter: If I connect the 5 strings to 5 MPPTs inputs the Power Sharing feature will not work. The inverter MPPT inputs are not complete. If I arrange the the 80 modules orientation 2, in 5 strings to complete the 6 inverter MPPT inputs, Pnom ratio will be too low. What am I missing? Any help will be greatly appreciated. I am looking forward to hearing from you. Best regards Carlos Melim Edited September 5 by Carlos Melim Link to comment Share on other sites More sharing options...
Muhammed Sarikaya Posted September 10 Share Posted September 10 Dear Carlos, I can't see the step where you define the power sharing, so I assume that you have mastered the subject. I can suggest the following steps for the 40 kW inverter with 4 MPPTs: First inverter input: connect 2 strings Second inverter input: connect 1 string Third inverter input: connect 1 string Fourth inverter input: connect 1 string This requires you to create 4 sub-arrays where you define the previous inputs. That means you will have: Sub-array 1: 2 strings Sub-array 2: 1 string Sub-array 3: 1 string Sub-array 4: 1 string This method will allow you to create and use power sharing effectively. If you need more help, don't hesitate to reach out to us. Regards, Muhammed Sarikaya Link to comment Share on other sites More sharing options...
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