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Rising then decreasing pv output power cycles
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<blockquote data-quote="binky" data-source="post: 468048" data-attributes="member: 490"><p>1/ OK so you have a voltage but have you checked ampage from panels for consistent energy flow? Need clamp ammeter and connect ends of string together.</p><p></p><p>2/ have you checked the AC side like the grid voltage and the cct in general?</p><p></p><p>3/ I am assuming a twin MPPT tracker inverter - swop strings between MPPT trackers and conect 1 string only.</p><p></p><p>has the customer got any form of inverter monitor, or is inverter stuck in attic where he never goes so hasn't a clue? </p><p></p><p>Eversolar are rubbish inverters, but they generally fail the AC relay rather than mess around. Assuming inverter is actually working then I would suspect grid voltage is high or a fault with AC side such as high rsistance which is forcing inverter to derate itself. </p><p></p><p>As for MC4s, they may be push and click, but that doesn't mean they are correctly fitted in the first place, though generally any issues are those from MC4s fitted to string cables rather than factory fitted connectors on the panels.</p><p></p><p>Trouble is you have taken on a piece of work you know little about, I suggest you avoid in future! :^O</p></blockquote><p></p>
[QUOTE="binky, post: 468048, member: 490"] 1/ OK so you have a voltage but have you checked ampage from panels for consistent energy flow? Need clamp ammeter and connect ends of string together. 2/ have you checked the AC side like the grid voltage and the cct in general? 3/ I am assuming a twin MPPT tracker inverter - swop strings between MPPT trackers and conect 1 string only. has the customer got any form of inverter monitor, or is inverter stuck in attic where he never goes so hasn't a clue? Eversolar are rubbish inverters, but they generally fail the AC relay rather than mess around. Assuming inverter is actually working then I would suspect grid voltage is high or a fault with AC side such as high rsistance which is forcing inverter to derate itself. As for MC4s, they may be push and click, but that doesn't mean they are correctly fitted in the first place, though generally any issues are those from MC4s fitted to string cables rather than factory fitted connectors on the panels. Trouble is you have taken on a piece of work you know little about, I suggest you avoid in future! :^O [/QUOTE]
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Rising then decreasing pv output power cycles
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