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Green Renewable Energy Forum
Solar PV Forum
New Solar PV design - split system (u/floor heating + domestic supply)
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<blockquote data-quote="binky" data-source="post: 523283" data-attributes="member: 490"><p>I don't see why you can't have a manual change over switch, we fit such items to isolate some sites from main connection eg during a power failure, so that a diesel generator can be used. One thing you do need to consider is your connection with the grid, you need to apply to the DNO for a large array, and will probably need export limitation to comply with their requirements. This means fitting a control at the consumer head that links to the inverters by cat 5 cable. Generally cat 5 is good for about 100m, so this probably means locating inverters closer to the house. You can use SWA cable for DC side to achieve this - do not try burying solar cable, it fails after about 5 years in constant damp conditions. I've rewired solar farms for this fault.</p></blockquote><p></p>
[QUOTE="binky, post: 523283, member: 490"] I don't see why you can't have a manual change over switch, we fit such items to isolate some sites from main connection eg during a power failure, so that a diesel generator can be used. One thing you do need to consider is your connection with the grid, you need to apply to the DNO for a large array, and will probably need export limitation to comply with their requirements. This means fitting a control at the consumer head that links to the inverters by cat 5 cable. Generally cat 5 is good for about 100m, so this probably means locating inverters closer to the house. You can use SWA cable for DC side to achieve this - do not try burying solar cable, it fails after about 5 years in constant damp conditions. I've rewired solar farms for this fault. [/QUOTE]
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New Solar PV design - split system (u/floor heating + domestic supply)
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