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    NAPIT demanding we reconcile all our MCS certs with building regs notifications back to 2010

    Has anyone else had this demand? NAPIT are now attempting to insist that we need to go through our records of hundreds of installs since 2010 and fully account for a 15% discrepency between the number of MCS certs issued and the number of building regulations notified via NAPIT. The vast...
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    Qualifications challenged at MCS Renewal ?

    apparently the + and - signs aren't sufficient on the MC4s on the DC cables to the inverter to denote which is positive and negative, despite this being given as an 'or' option in bs7671 for cable marking - apparently someone might remove the MC4 and then not know which cable was which so it...
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    PV Systems require more maintenance than other circuits?

    sparks having to pull cables back out to test at the end of the job while the rest of the team are in the van chomping at the bit to get home?
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    Earthing PV rails

    no need for a second RCD as the first at the supply end will disconnect the return paths connection to earth, leaving a circuit that's protected by being a separated circuit. As long as the neutral and earth aren't bonded at the inverter, which they shouldn't be.
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    Earthing PV rails

    MCS standard says no, IET guide says yes to earthing rails. MCS hasn't adopted IET guide despite the lead authors also being members of the MCS technical steering group who wrote most of the MCS guide. So officially the answer is depends which guide you want to follow. We don't for multiple...
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    How often should PV panels and the inverters be checked or maintained

    No real need for checking beyond maybe every few years checking the inverter vents haven't got clogged up with dust. The inverter does an insulation resistance test on start up every morning so unless the inverter's showing a fault there's really no need for further regular testing beyond what...
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    Off grid earthing system

    are you sure this is off grid, and not a hybrid system with grid connect and battery back up? AFAIK those inverters don't have off grid functionality - or is the generator and demand big enough that they're able to take their reference from the generator and just reduce the demand from the...
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    Off grid earthing system

    can you post up make and model of the inverters?
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    MCS inspection

    Who is it? Yes that sounds like a serious conflict of interest if they are still trading.
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    EPC New Build

    I intend to flag this up at the next MCS technical steering group meeting as well. Not that MCS has any jurisdiction, but the steering group were to agree to write to DECC & OFGEM to raise the issue and request that they address it, then it's possible that it might get resolved. Ofgem has the...
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    Brexit court defeat for UK government

    why are people still telling other people to get over it? This is the biggest decision to happen to this country in decades, it's already having a massive impact on our business, and the decisions now being taken behind closed doors will go on having a huge impact on our lives for decades to...
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    Brexit court defeat for UK government

    maybe not, but when the remain campaigners were pointing out what would inevitably happen in the event of a brexit vote they were met with accusations of this being part of project fear etc. As you say, it was inevitable, and there was a case to have been made for a reduction in the pound's...
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    Brexit court defeat for UK government

    The pound has fallen about 12% since brexit, and 25% since the start of the year against the Euro due to the uncertainty around Brexit before the vote. Construction was down 1.4% in the quarter since Brexit, Manufacturing down 0.4% (it had grown at 2.1% the previous quarter so that's a fair...
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    Brexit court defeat for UK government

    On what terms did the will of the people say we should leave the EU? The government aren't really there because of the will of the people, they were elected by something like 24% of the potential electorate, in large part because they for £10 million more in donations than Labour, largely from...
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    SunPower E20 with P300 SolarEdge Power Optimizer?

    That's a more serious issue than the inverter size, particularly as it'd breach the warranty, but also as it's presumably going to be drawing power from the panels at a less efficient voltage point than it should be. That is a remove and replace under warranty situation in my opinion.
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    Brexit court defeat for UK government

    it's very rare that I do this, but here's Margaret Thatcher's take on the dangers of referendums, which we're now witnessing. The idea that a referendum on a very broad question should then give the leader a mandate to basically do whatever they want within that broad mandate without any...
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    Brexit court defeat for UK government

    That's taken from the AV referendum, it's the section that made that referendum a binding referendum. There's no similar section or provision in the EU referendum legislation, without it the referendum is a non-binding referendum and would require a separate act of parliament to actually put...
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    Brexit court defeat for UK government

    That's from the 1972 treaty, which basically states that any change to any of the EU Treaties, or new Treaties or agreements with the EU can only be entered into following approval by both houses of parliament. Nothing in the referendum legislation did that, and it can't be done via statutory...
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    Brexit court defeat for UK government

    If the EU is such a wonderful success... bit of a straw man start to the post. why has the EU got the 2nd lowest growth in the entire world? Austerity. Why has the pursuit of the Euro for all new entrants been continued as its clear for everybody to see that its a failed project as the...
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    Brexit court defeat for UK government

    it won't be overturned, their legal ruling is a correct interpretation of the law, as was completely clear in the terms of the original referendum legislation. Parliament will make the final decision be it to accept May's proposals, amend them, reject them, or send the final proposals back to...

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