CivilNJ

I am definitely missing something and am under the gun now. Throw out my original screen grabs. I now have 7 separate breakdowns of the original data. SolarEdge 33k US Inverter with P700 Optimizer and Hyundai HiS-S350TI Modules My strings/tilts are as follows: String 1: 33 modules @ 5 degrees String 1: 6 modules @ 18 degrees String 2: 14 modules @ 18 degrees String 2: 26 modules @ 5 degrees String 3: 20 modules @18 degrees String 3: 18 modules @ 5 degrees String 3: 2 modules @ 18 degrees I have two Orientations set up - 1 for 5 degrees and one for 18 degrees I have 7 sub-arrays representing each of these string parts noted. I have fractional inputs checked with the total or all seven = 1.0 inverter (0.2, 0.1,.., etc.) I have tried setting each sub-array to the proper orientation for that section and tried it with the Mixed #1 and #2 settings. Orientation parameters Field type: Several orientations 2 orientations: tilt/azim = 5°/0°, 18°/0°, Compatibility between System defintions Orientation #1 tilt/azim = 5° / 0° 3 sub-arrays PNom = 37 kWp, modules area = 207 m² Orientation #1: No Shading field defined Orientation #2 tilt/azim = 18° / 0° 4 sub-arrays PNom = 41 kWp, modules area = 227 m² Orientation #2: No Shading field defined System parameters 7 sub-arrays defined Sub-array #1 5 Degree String 1 Orientation #1Tilt/Azimut = 5.0° / 0.0° PV modules: 1 strings of 34 modules in series, 34 total Pnom = 350 Wp Pnom array = 12 kWp, Area = 67 m² Inverters (33.3 kWac) 2 MPPT inputs, Total 7 kWac, The inverter power is strongly undersized. Sub-array #2 18 Degree String 1 Orientation #2Tilt/Azimut = 18.0° / 0.0° PV modules: 1 strings of 30 modules in series, 30 total Pnom = 350 Wp Pnom array = 11 kWp, Area = 59 m² Inverters (33.3 kWac) 1 MPPT inputs, Total 3 kWac, The inverter power is strongly undersized. Sub-array #3 18 Degree String 2 Orientation #2Tilt/Azimut = 18.0° / 0.0° PV modules: 1 strings of 34 modules in series, 34 total Pnom = 350 Wp Pnom array = 12 kWp, Area = 67 m² Inverters (33.3 kWac) 1 MPPT inputs, Total 3 kWac, The inverter power is strongly undersized. Sub-array #4 5 Degree String 2 Orientation #1Tilt/Azimut = 5.0° / 0.0° PV modules: 1 strings of 36 modules in series, 36 total Pnom = 350 Wp Pnom array = 13 kWp, Area = 70 m² Inverters (33.3 kWac) 2 MPPT inputs, Total 7 kWac, The inverter power is strongly undersized. Sub-array #5 18 Degree String 3a Orientation #2Tilt/Azimut = 18.0° / 0.0° PV modules: 1 strings of 32 modules in series, 32 total Pnom = 350 Wp Pnom array = 11 kWp, Area = 63 m² Inverters (33.3 kWac) 2 MPPT inputs, Total 7 kWac, The inverter power is strongly undersized. Sub-array #6 5 Degree String 3 Orientation #1Tilt/Azimut = 5.0° / 0.0° PV modules: 1 strings of 36 modules in series, 36 total Pnom = 350 Wp Pnom array = 13 kWp, Area = 70 m² Inverters (33.3 kWac) 1 MPPT inputs, Total 3 kWac, The inverter power is strongly undersized. Sub-array #7 18 Degree String 3b Orientation #2Tilt/Azimut = 18.0° / 0.0° PV modules: 1 strings of 20 modules in series, 20 total Pnom = 350 Wp Pnom array = 7.0 kWp, Area = 39 m² Inverters (33.3 kWac) 1 MPPT inputs, Total 3 kWac, The inverter power is strongly undersized. Am I missing something very obvious or it this not the correct logic? Any assistance appreciated. Jim

It seems like there is more to this than simply turning on the Fractional Inputs. I had originally tried to analyze this with only one string on multiple tilts - oops. Now including all 3 strings to this inverter. I just haven't done anything this complex before. When you enter the planned power, it sets the Fractional to 0.1 - does that need to be set to the actual fraction of the array for each segment? Orientation parameters Field type: Several orientations 2 orientations: tilt/azim = 5°/0°, 18°/0°, Compatibility between System defintions Orientation #1 tilt/azim = 5° / 0° 3 sub-arrays PNom = 37 kWp, modules area = 207 m² Orientation #1: No Shading field defined Orientation #2 tilt/azim = 18° / 0° 4 sub-arrays PNom = 41 kWp, modules area = 227 m² Orientation #2: No Shading field defined System parameters 7 sub-arrays defined Sub-array #1 5 Degree String 1 Orientation #1Tilt/Azimut = 5.0° / 0.0° PV modules: 1 strings of 34 modules in series, 34 total Pnom = 350 Wp Pnom array = 12 kWp, Area = 67 m² Inverters (33.3 kWac) 3 MPPT inputs, Total 10 kWa Sub-array #2 18 Degree String 1 Orientation #2Tilt/Azimut = 18.0° / 0.0° PV modules: 1 strings of 30 modules in series, 30 total Pnom = 350 Wp Pnom array = 11 kWp, Area = 59 m² Inverters (33.3 kWac) 1 MPPT inputs, Total 3 kWac, The inverter power is strongly undersized. Sub-array #3 18 Degree String 2 Orientation #2Tilt/Azimut = 18.0° / 0.0° PV modules: 1 strings of 34 modules in series, 34 total Pnom = 350 Wp Pnom array = 12 kWp, Area = 67 m² Inverters (33.3 kWac) 1 MPPT inputs, Total 3 kWac, The inverter power is strongly undersized. Sub-array #4 5 Degree String 2 Orientation #1Tilt/Azimut = 5.0° / 0.0° PV modules: 1 strings of 36 modules in series, 36 total Pnom = 350 Wp Pnom array = 13 kWp, Area = 70 m² Inverters (33.3 kWac) 2 MPPT inputs, Total 7 kWac, The inverter power is strongly undersized. Sub-array #5 18 Degree String 3a Orientation #2Tilt/Azimut = 18.0° / 0.0° PV modules: 1 strings of 32 modules in series, 32 total Pnom = 350 Wp Pnom array = 11 kWp, Area = 63 m² Inverters (33.3 kWac) 2 MPPT inputs, Total 7 kWac, The inverter power is strongly undersized. Sub-array #6 5 Degree String 3 Orientation #1Tilt/Azimut = 5.0° / 0.0° PV modules: 1 strings of 36 modules in series, 36 total Pnom = 350 Wp Pnom array = 13 kWp, Area = 70 m² Inverters (33.3 kWac) 2 MPPT inputs, Total 7 kWac, The inverter power is strongly undersized. Sub-array #7 18 Degree String 3b Orientation #2Tilt/Azimut = 18.0° / 0.0° PV modules: 1 strings of 20 modules in series, 20 total Pnom = 350 Wp Pnom array = 7.0 kWp, Area = 39 m² Inverters (33.3 kWac) 1 MPPT inputs, Total 3 kWac, The inverter power is strongly undersized. Shading scene parameters No shading scene defined

it is 41.65 kW DC and a 33.3 inverter, so yes. I will try turning on the fractional usage. Thank You.

I am trying to understand/run an analysis of a rooftop system where the designer is using SolarEdge 33k US Inverter with P700 Optimizer and Hyundai HiS-S350TI Modules . Using PVsyst version 6.63 The design jumps to two different tilt scenarios on one string and I believe that I have set it up properly but it seems to be unable to run the Simulation because one of the Sub-Arrays is too small (inverter is strongly oversized message). I have attached two screen grabs in the hopes that someone can direct me properly with this. Am I missing something or is this even possible? I just got off the phone with SolarEdge and the multi-tilt option shouldn't be an issue. I must be missing something in the PVsyst program.

I tried using the new NSRDB Data Viewer and located my site, went to Data Download (Point) and selected MTS1 and MTS2 tabs to retrieve TMY2 or TMY3 files. I receive a download but I receive format errors on import into PVsyst. I also noted that I do not see this option (from the Help File) - "Import Meteo Data"/”NREL National Solar Resource Database” . Was this removed in version 6.34? I am using US TMY2 and TMY3 and it throws errors. Error: Conversion error of string "Source" => LongInt and then it continues with additional ones for "State", etc. I assume that something is incorrect in the header but I want to be sure that I am using the proper file and import option.