Mike Posted December 14, 2022 Share Posted December 14, 2022 I have a roof of 1000m2, and i propose an east west technique for the PV system design. Please review below steps and provide your feedback if the input data of such simulation is correct or not? I presume to simulate such system in PVsyst. the following steps I have considered. I have introduced 2 orientations a)1st to east and with area (500m2) I have chosen the module power and quantities based on the efficient usage of the available area (maximum percentage used of the available 500m2) I have chosen the inverter power rating 20% less than total modules power rating. b)2nd to west and with the same area (500m2) with single inverter I have chosen the module power and quantities based on the efficient usage of the available area (maximum percentage used of the available 500m2) I have chosen the inverter power rating 20% less than total modules power rating. Link to comment Share on other sites More sharing options...
Michele Oliosi Posted December 15, 2022 Share Posted December 15, 2022 For the implementation within PVsyst: Are you in a dome (e.g. schematically /\/\/\/\/\/\/\/\/\ ) or two pane roof (schematically ////// \\\\\\\ ) situation ? For the dome one, you could just use a single sub-array, and choose "mixed orientation 1 and 2" instead of having two separate orientation sub-arrays. For the two pane roof, I think your approach works well: you create one sub-array for each orientation individually. Link to comment Share on other sites More sharing options...
Mike Posted December 23, 2022 Author Share Posted December 23, 2022 I have an upper roof and lower roof (tilt angle is zero) - (Flat roofs). So, I believe single Sub-array with "mixed orientation 1 and 2" for each roof would be suitable. Also, I am planning to have either (one inverter per each orientation, so total no. of inverters would be four (two for the upper roof and two for the lower roof)), or (one inverter for each roof with 2 MPPT). What do you think for the above design strategy? Link to comment Share on other sites More sharing options...
dtarin Posted December 28, 2022 Share Posted December 28, 2022 If tilt is zero, you dont need to consider mixed orientations. Just create two subarrays, each with 2 inverters, and the number of modules/strings per roof for each. Link to comment Share on other sites More sharing options...
Michele Oliosi Posted January 3 Share Posted January 3 Yes, I agree with @dtarin if your modules lay flat, then you can put everything in a single orientation. If the modules are in alternating east west fashion (what I meant by domes i.e. something like the image below), then mixed orientation for each subarray is fine. Link to comment Share on other sites More sharing options...
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