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    Solar farm earthing

    It does look odd. I'll have a go at identifying a few points, but I think I agree with Gavin that it needs stripping out and re-doing. - Is that armoured cable coming in? With those colours (the fourth core being G/Y not blue) it might not be SWA but RV-K. - If it is armoured then the armour...
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    Biomass Help Please

    Looking here, you might be ok with a single meter if the distribution pipes are properly insulated https://www.ofgem.gov.uk/publications-and-updates/non-domestic-renewable-heating-incentive-metering-faq but it gets complicated and I think I have read elsewhere that ofgem still want the losses...
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    Biomass Help Please

    Just off out so no time for a long answer, but he does not need to achieve any particular level of EPC. If domestic then he does need GDA and EPC, but the worse the EPC is, the more will be the deemed RHI payment. If GDA recommends increasing loft insulation or adding cavity wall insulation...
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    MCS/Domestic RHI disconnect

    In 6 months time he will still be in the category 'eligible new build', so should be exempt the green deal assessment requirement?
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    MCS/Domestic RHI disconnect

    I think I have bumped into a small disconnect between the two schemes. Architect designed new-build / self-build. I install and commission ASHP and solar thermal. Client moves in a few days later. Client applies for domestic RHI a few days after that. Solar thermal application going through...
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    pole mounted transformer identification -3 phase, 2 phase???

    Gavin, Why can't the existing 3-phase supply cable take split phase voltage difference? For example Batt's SWA is rated at 600/1000V and ordinary PVC twin+E or triple+E is rated at 300/500V.
  7. B

    Help with understanding Import /export on 2 phase supply.

    The documents I was thinking of can be accessed here: Association of Meter Operators - Reverse Running meters
  8. B

    Help with understanding Import /export on 2 phase supply.

    If your 3 phase meter meets current standards then the power it records as used is the NET power across the phases. So you can be exporting on one and importing on the other and net power could be positive, zero or negative. I do not have a link to hand but you will find docs on the web about...
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    MCS letter Generation meter

    Never fitted one in a loft, but have regularly fitted them inside consumer units. Hope that is consider to meet the requirement of being on a vertical surface!
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    Mix and Match modules

    The inverter will not know you have a different panel there, it will just hunt up and down the power curve to get to a maximum. So you want a panel with similar characteristics to the others in so that it causes no lumps/bumps on the curve for the mpp tracker to get stuck on. The panel you...
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    Re: Extra Low volt switching for lighting

    To answer the original question, BS7671 describes its scope at Part 1 Chapter 11. It basically includes all the wiring you are likely to find in domestic premises except that specifically covered by appliance standards. So all ELV circuits, telephone wiring and network wiring falls within the...
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    pole mounted transformer identification -3 phase, 2 phase???

    I think Marvo's suggestion of split phase is the most likely from what I can see in the photos. I hope there are no other more standard transformers locally as the earth reference and currents will be unusual if that is a centre tapped neutral referenced to earth. I am no expert in identifying...
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    FiT payments

    eon for my own
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    6mm Brown/ Grey DC cable

    google for brown 6mm solar cable Clynder 6mm Solaflex 100m Brown - U Solar Shop
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    G83/2 Larger than 4kW Inverters

    use a sma 5000tl and adjust parameters manually?
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    6mm Brown/ Grey DC cable

    segen do it in black if you are willing to sleeve the ends
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    Workmanship warranty

    Completely agree. It is pointless having a warranty company involved if they want you to underwrite the warranty. My recollection is they only take this stance with relatively new companies and that they did not ask me to sign my life away. You might ask what the criteria are to avoid it.
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    RooFit refused - planning for 100kw on roof

    I assume the secodnary legislation you are thinking of is http://www.legislation.gov.uk/uksi/2012/748/pdfs/uksi_20120748_en.pdf The bit you are relying on is: Note the word MICROGENERATION in the title. I have not traced back the definitions but suspect your planners are relying on the...
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    Wireless Contactor for PV and Standby Generator

    No doubt wireless is available or can be made up. A simpler way perhaps would be to put an ordinary contactor on the output of the inverter with the energising coil powered from the inverter side of the contactor and a push button to short the contactor. Once energised the contactor will keep...
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    FiT Legal Ruling

    Presumably we have 6 years from Dec 2011 to jump on the bandwagon?

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