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Solar pv batteries distance to CU
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<blockquote data-quote="revor" data-source="post: 507038" data-attributes="member: 23254"><p>Been ages making any progress and have got the array frame erected and by next week should have all I need to do the job. I have quite a dilemma on what the earthing arrangement should be. The IET code of practice for grid connected PV says for a TN-C-S earthed house the panels and frame should have a earth rod and that connected to the TN-C-S earth. (No mention of TT or TN-S) From what I can make out the target impedance is quite different for both so what happens when they are connected together. I spoke to the technical authority on the inverter and he explained that there is quite a lot of confusion around PV earthing with many different approaches. (In the guidance notes there is an acknowledgement that there are complex arguments as to whether or not and array should be earthed but don't go into them.) He recommended doing the earthing to the ground rod but not earth the armour of the SWA carrying the DC to the inverter but to ground the inverter to the house in normal manner. He also mentioned that many installations are not earthed at all which might explain why I have been finding difficulty getting hold of earth ancillaries for solar PV. (Anyone know of source of Stainless Steel crimp terminals without having them especially made). Any other views on this earthing conundrum?</p></blockquote><p></p>
[QUOTE="revor, post: 507038, member: 23254"] Been ages making any progress and have got the array frame erected and by next week should have all I need to do the job. I have quite a dilemma on what the earthing arrangement should be. The IET code of practice for grid connected PV says for a TN-C-S earthed house the panels and frame should have a earth rod and that connected to the TN-C-S earth. (No mention of TT or TN-S) From what I can make out the target impedance is quite different for both so what happens when they are connected together. I spoke to the technical authority on the inverter and he explained that there is quite a lot of confusion around PV earthing with many different approaches. (In the guidance notes there is an acknowledgement that there are complex arguments as to whether or not and array should be earthed but don't go into them.) He recommended doing the earthing to the ground rod but not earth the armour of the SWA carrying the DC to the inverter but to ground the inverter to the house in normal manner. He also mentioned that many installations are not earthed at all which might explain why I have been finding difficulty getting hold of earth ancillaries for solar PV. (Anyone know of source of Stainless Steel crimp terminals without having them especially made). Any other views on this earthing conundrum? [/QUOTE]
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