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Solar panels tripping rcd
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<blockquote data-quote="binky" data-source="post: 458735" data-attributes="member: 490"><p>Actually, not many electricans are aware of this, apart from not meeting the disconnection times (although inverters do have a mains fail function that should meet reasonable times of around 0.4s ) the main issue is the relay in the inverter upsetting RCDs, especially when shared. My preferred option is always to keep thesolar separate to everything else. His means a high integrity board should be fitted, or a Mini CU solely for the solar system, which also means if RCD protection is required a 100mA or 300mA RCD can be fitted - 300mA works best.</p><p></p><p>The clicking you can here is the AC mains relay, it tends to' 'chatter' afew times morning an evenings, the inverters have some meaty capacitors for smoothing the AC output, so a combination of chattering and throwing some biggish voltages down the earth upsets the RCD almost every time. </p><p></p><p>NB if anyone is dealing with an inverter as part of doing other works, be careful of the earth from the inverter, it can give quite a tingle until the capacitors have fully discharged - think electric fence! :swear:</p></blockquote><p></p>
[QUOTE="binky, post: 458735, member: 490"] Actually, not many electricans are aware of this, apart from not meeting the disconnection times (although inverters do have a mains fail function that should meet reasonable times of around 0.4s ) the main issue is the relay in the inverter upsetting RCDs, especially when shared. My preferred option is always to keep thesolar separate to everything else. His means a high integrity board should be fitted, or a Mini CU solely for the solar system, which also means if RCD protection is required a 100mA or 300mA RCD can be fitted - 300mA works best. The clicking you can here is the AC mains relay, it tends to' 'chatter' afew times morning an evenings, the inverters have some meaty capacitors for smoothing the AC output, so a combination of chattering and throwing some biggish voltages down the earth upsets the RCD almost every time. NB if anyone is dealing with an inverter as part of doing other works, be careful of the earth from the inverter, it can give quite a tingle until the capacitors have fully discharged - think electric fence! :swear: [/QUOTE]
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