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Hello - PV newbie seeking some advice
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<blockquote data-quote="binky" data-source="post: 553852" data-attributes="member: 490"><p>Utility room is perfect - fitting heavy inveters and batteries in under eaves spaces can be back breaking work. So based on downstairs area, 25mm conduit to roof for the DC cabling should be fine (NB try to avoid bends), based on 2 string array. Separate conduit for aerial and boroadband, as we dont like to mix power with signal cabling. Run say 6mm for AC to utility room, and you may need a cat 5 cable for amp clamp if you fit batteries - depends on how hard it is to get to main consumer unit on your house. I'm saying 6mm as that will give you upto 40Amp or 9kW supply, and even if you only fit say a 4kW system, it helps keep cable cool and is simply more efficient for little extra cost over say a 2.5 or 4mm cable. Larger cable will also allow for possible cable derating due to insulation - run a cable through 500mm of insulation and we derate it by half. </p><p></p><p>One other thing to consider, battery and no solar is quite popular these days. This allows you to take advantage of off peak leccy tariffs without the cost of accessing roof to fit panels. It's a shame you havn't the budget to do the solar as part of the build as you would already have the scoffolding up, and you could fit an in-roof solar system, which looks a lot better than on roof, and doesn't involve invalidating any roofers warranties fitting an on-roof system. It costs more in materials, but that additional cost is offset in savings on slates or tiles for the roof</p></blockquote><p></p>
[QUOTE="binky, post: 553852, member: 490"] Utility room is perfect - fitting heavy inveters and batteries in under eaves spaces can be back breaking work. So based on downstairs area, 25mm conduit to roof for the DC cabling should be fine (NB try to avoid bends), based on 2 string array. Separate conduit for aerial and boroadband, as we dont like to mix power with signal cabling. Run say 6mm for AC to utility room, and you may need a cat 5 cable for amp clamp if you fit batteries - depends on how hard it is to get to main consumer unit on your house. I'm saying 6mm as that will give you upto 40Amp or 9kW supply, and even if you only fit say a 4kW system, it helps keep cable cool and is simply more efficient for little extra cost over say a 2.5 or 4mm cable. Larger cable will also allow for possible cable derating due to insulation - run a cable through 500mm of insulation and we derate it by half. One other thing to consider, battery and no solar is quite popular these days. This allows you to take advantage of off peak leccy tariffs without the cost of accessing roof to fit panels. It's a shame you havn't the budget to do the solar as part of the build as you would already have the scoffolding up, and you could fit an in-roof solar system, which looks a lot better than on roof, and doesn't involve invalidating any roofers warranties fitting an on-roof system. It costs more in materials, but that additional cost is offset in savings on slates or tiles for the roof [/QUOTE]
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Green Renewable Energy Forum
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Hello - PV newbie seeking some advice
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