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Relative Low Performance of Domestic PV System
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<blockquote data-quote="Bob Smith" data-source="post: 537545" data-attributes="member: 35176"><p>If this is confirmed all the panels have been put on one string and knowing that half of them are facing a different way (opposite direction), I think it would be fair to say that they have not installed the system for optimum performance.</p><p></p><p>[USER=35891]@Jena[/USER] Please check carefully your system (number of DC switch, check online what your inverter is doing) before shouting at your installer <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p><p>Just to be sure that what we are saying is correct.</p><p></p><p>Why is it important in your situation to have your panels connected in two strings?</p><p>Each string of your inverter needs a minimum of power to start converting DC to AC.</p><p>In a string the panels are installed in series and to make a long story short, if one panel is not performing this affect the entire string.</p><p>Therefore, since your panels are facing West and East they are not exposed to the light the same way. Even if one side west or east produces enough to kick off the invert the other side receiving less light will affect the entire string.</p><p></p><p>I do not know the type of inverter you have. Some still have only one string. This could be the reason for such set up but then the question becomes why having installed an inverter with one string.</p><p></p><p>Looking forward to receiving your confirmation (or not) so we can say we have found the root cause of the poor performance of your system.</p></blockquote><p></p>
[QUOTE="Bob Smith, post: 537545, member: 35176"] If this is confirmed all the panels have been put on one string and knowing that half of them are facing a different way (opposite direction), I think it would be fair to say that they have not installed the system for optimum performance. [USER=35891]@Jena[/USER] Please check carefully your system (number of DC switch, check online what your inverter is doing) before shouting at your installer ;) Just to be sure that what we are saying is correct. Why is it important in your situation to have your panels connected in two strings? Each string of your inverter needs a minimum of power to start converting DC to AC. In a string the panels are installed in series and to make a long story short, if one panel is not performing this affect the entire string. Therefore, since your panels are facing West and East they are not exposed to the light the same way. Even if one side west or east produces enough to kick off the invert the other side receiving less light will affect the entire string. I do not know the type of inverter you have. Some still have only one string. This could be the reason for such set up but then the question becomes why having installed an inverter with one string. Looking forward to receiving your confirmation (or not) so we can say we have found the root cause of the poor performance of your system. [/QUOTE]
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Relative Low Performance of Domestic PV System
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