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    VAT on Replacement Inverters

    It's not clear cut as I read it. If you were to ask HMRC, I suggest they would say a replacement inverter is standard rated. It's a [whole] system that consists of panels with cabling, control panel and inverter that is reduced rated when installed.
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    Immersuns causing faults???

    Resurrecting an old thread but I have had another immersion heater break wth an Immersun, the immersion having been previously replaced two years ago. I think the problem is that the plumber used the cheapest possible copper sheathed immersion (the client had the box). With immersions that are...
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    Girl / lady electricians....?

    Zs on IET site if you need a female electrician
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    Help! Solar Pv System Question

    Sgt Woulds, I think there has been some misunderstanding. From what the OP said, there are 2 mcbs on the shower CU, a 45A one for the shower and a 16A one for the PV. So the PV is on its own final circuit and does not need changing from that perspective. Between the Shower CU and Main CU...
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    Help! Solar Pv System Question

    I agree with what Gavin says. There is a risk that you are chasing rainbows trying to match the pre sales forecast. What was that forecast? I cannot see it in your original post.
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    Notify change of modules

    I do not think the DNO will be worried, but from memory the FIT supplier will, because changing the panels potentially changes the TIC as the FIT suppliers define it. The answer must be: - read the letter giving authority to generate in parallel. (Here, WPD issue one.) - read the FIT contract
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    Immersuns causing faults???

    On the two immersions, it was definitely the elements that had gone as I had access to the terminals. On the thermostat, the backup had tripped a few times and been reset by the client a few times before the thermostat went open circuit. I could not tell for sure which bit of the thermostat...
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    Immersuns causing faults???

    Have added some extra detail above.
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    Immersuns causing faults???

    Possibly. I really don't know. I was wondering whether others had had failures.
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    Immersuns causing faults???

    I have had x3 faults appear recently on plumbing/electrical systems to which I have fitted Immersun: - A Cotherm immersion on a Megaflow cylinder went open circuit after about 2 years of Immersun use. Needed to be drained and new immersion fitted. - A Cotherm immersion on an Albion cylinder...
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    4Eco/Immersun Stops Trading

    The Solar Edge controller looked the same as the Elios offering...
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    PV+ - anybody heard of this?

    I am still not convinced Gavin, because although I take your point that certain combinations of generated power, kettle power and voltage could work as you describe, most times when voltage is high will be bright sunshine with good output from the panels that has a good chance of covering the...
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    31st March deadline for FIT applications for systems with MCS cert issued <16th Jan

    Re: 31st March deadline for FIT applications for systems with MCS cert issued <16th J Forgive me being lazy, but have you spotted anything similar for domestic or non-domestic rhi?
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    PV+ - anybody heard of this?

    Snake oil by the look of it. I would be happy to be shown some evidence to the contrary, but my feeling is that in domestic circumstances, voltage optimisation is unlikely to produce significant savings given the design of modern appliances and lighting. Even the example they quote of the...
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    Domestic three phase with single phase PV - net metering

    http://www.meteroperators.org.uk/images/FAQ_and_Stakeholder_Info/Reverse_running_meters_20130820.pdf
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    Domestic three phase with single phase PV - net metering

    Yes, it is A. I do not have the link to hand but there is a standard published which states that meters should be programmed to do the sum net across the phases. I think it has been cited here before.
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    Flooded Ducting and Low IR so

    I have checked now: the standard I quoted, BS 5467, is for xple insulation, pvc bedding and pvc sheath.
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    Flooded Ducting and Low IR so

    SWA is designed for direct burial, but not permanent immersion. In most situations a bit of earth leakage is not critical, but in the OP's case it was. You may be interested in the following extracted from Appendix Q of BS 5467: Q.3.5 Cables specified in this British Standard are not...
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    Flooded Ducting and Low IR so

    Re: Flloded Ducting and Low RIso If you look at the standards and manufacturers specs you will find that T&E and SWA are NOT designed to be underwater permanently because they do absorb water. You need a more specialised cable. Google pond cable for starters, although if we are talking string...
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    Failed Solar Edge optimser

    It is a cost and time efficient way of doing an install. If an optimiser fails then a link can be broken and a stand-alone one put in to replace it.

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