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bendesa1962

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  1. Hi all, I have a questions about the detailed losses that can be defined in PVSyst. And than special the Ohmic Losses tab. I have studied the available PV Tutorials and read several articles about it. I can't find a in detail explained version in PVSyst manual. I would like to explain my question by a real live case. See the SLD below Capacity 940,680 Watt 13 x Huawei SUN2000 KTL 60 KW 2808 x Seraphim 335 Wp Poly 156 Strings AC Side All Inverters are connected with an ACDP by NYY Cable 4C x 35mm2 N L1 L2 L3 All inverters are grounded by NYA Cable 1C x 16mm2 from inverter to grounding bus bar in the ACDP Average distance from Inverter to ACDP 15 Meter The ACDP is connected with a MDP Distance from ACDP to MDP 60 Meters NYY Cable 4 x (3 x 1 C x 300mm2) N L1 L2 L3 NYA Cable 2 x (1C x 240mm2) Grounding between ACDP and Grounding Bus Bar of the MDP DC Side 156 Strings Average string length between string and inverter 150 meter H1Z2Z2-K Solar cable 2 x (1C x 4mm2) I think that's all information we need. The question is how to adapt this info to the Ohmic Losses Tab in PV Syst First DC Side First we must make the choice between a general number for losses or a calculated number for losses. I want to define calculated number for losses. Global Wiring resistance. The number of 18.49 shows up automatically. Where does it come from? How is it calculated? After clicking Detailed Computation the following screen pops up What is meant here by String module connections / Average Length m / circuit? Is this the average String length 150 meter? Or? That is just not clear to me. What is meant here by Main box to inverter / Average Length m / circuit? Is this the length in case we use a combiner box for strings and then here define the lengths between the combiner box and the inverter? That is just not clear to me. Second AC Side If I don't activate "Uses AC circuit ohmic loss" I guess there will be no AC losses included in the simulation results, is that correct? So I activate "Uses AC circuit ohmic loss" I can make a choice per inverter or whole system. I guess for a bigger system with more than one inverter we must activate Whole system. Is that correct? If I activate "Whole system" what will be the " Length inverter to injection" In my example I guess the distance between the ACDP and the MDP ? Is that correct? If I choose for wire section 400mm2 PVSyst gives an error message "This wire section is undersized for this current, with respect to IEC standards) I do understand that that number of square mm2 is to small. But when I choose 500mm2 in the wire section PVSyst says that is ok? I don't understand that. 500 mm2 in total is not enough to connect the ACDP with the MDP What exactly is meant by wire section? Is that meant per Phase and neutral? So 500mm2 for L1 500mm2 for L2 500 mm2 for L3 and 500 mm2 for Neutral? Than the official design that I posted is heavenly oversized with 3 x 1c x 300mm2 That's 900mm2 per Phase and Neutral? In my example I guess here stops defining the detailed losses for Ohmic losses because no I do realize that I ask a lot of questions, just want to make sure I understand PVSyst. It's a great programm Many thx in advance Kind regards Ben
  2. Hi Michele, Thank you so much for your fast reply. I'm going to look into that Kind regards Ben
  3. Hi, I keep on running into this error message. I know what it means but I can't just remove it. If I'm correct it means that the number of PV Modules defined in System does not meet the necessary area in the Near Shading part of the software. More specific the total area defined in the rectangular PV Plane area's is not enough for the panels defined in System. Ok that sounds logical. My first question is: If you choose for defining the rectangular size by the option: By modules how is it than possible to get this error message. The modules is know by PVSyst and also shown in the window of rectangular field. You let the program know 20 PV Modules in length and 5 in height. You also give in the X and Y spacing. The software is calculating the area by itself. But actually it's calculation is wrong because I get the error message? Second question: If you choose for defining the rectangular size by the option: By sensitive sizes I have defined 5 PV rectangle faces 4 have the same size for PV Module landscape 20 in length 5 in height I gave the rectangle the dimensions of 6,00 x 46,00 The size of the panels is 2,279 x 1,134 X spacing 0.02 Y spacing 0.02 So total size needed 20 x 2,279 + 19 x 0.02 = 45,96 5 x 1,134 + 4 x 0.02 = 5,75 So that must fit in the defined PV Area 6,00 x 46,00 The 5th PV Rectangle has the following dimensions 12,00 x 37,00 PV Modules Length 16, 10 in height The size of the panels is 2,279 x 1,134 X spacing 0.02 Y spacing 0.02 So total size needed: 16 x 2,279 + 15 x 0.02 = 36,76 10 x 1,134 + 9 x 0.02 = 11,52 The total number of panels defined in System is 560 The total number defined in Near Shading is: 20 x 5 x 4 = 400 16 x 10 = 160 Total 560 Where do I go wrong? Many thx for your contribution Kind regards Ben
  4. Hi, I've defined a 3d model in PVSyst but it doesn't show up in the report. I've tried several times but it just doesn't show up Anybody can help? Many thanks! Kind regards
  5. Yes that sounds so easy. I come I didn't come up with that solution (-: Mant thx
  6. Hi all. Is it possible in PVsyst to copy an existing project? Take care! Kind regards
  7. One more question for Azimuth: In the southern hemisphere it will be: Facing North is 0 Facing South is 180 Facing East is -90 Facing West is 90 How about Northern Hemisphere Like this? Facing North is 180 Facing South is 0 Facing East is -90 Facing West is 90 ?
  8. Hi All, I'm located in the southern hemisphere. It's my understanding PV Syst uses the following rules for Azimuth: In northern hemisphere, the plane azimuth is defined as the angle between south and collector plane. This angle is taken as negative toward east, i.e. goes in the antitrigonometric direction. Example: south plane, azimuth = 0, east plane, azimuth = -90°. In southern hemisphere, the plane azimuth is defined as the angle between north and collector plane. This angle is taken as negative toward east, i.e. goes in the trigonometric direction. For example for my location in the southern hemisphere: Facing North is 180 Facing South is 0 Facing East is -90 Facing West is 90 That's correct right ? Many thx Kind regards
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