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    Immersion Heater - PV electricity

  2. E

    Immersion Heater - PV electricity

    Mine has passed CE. It's not straightforward.
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    Immersion Heater - PV electricity

    Tried to run a EMI test on my system this morning but was thwarted by the immersion already being up to temperature by 9am. I have a Solartwin solar thermal system too which, whilst not very effective in winter, does provide this pumped mixing system with its 5watt DC pump as a by product of...
  4. E

    Immersion Heater - PV electricity

  5. E

    Immersion Heater - PV electricity

  6. E

    Immersion Heater - PV electricity

    Tim please rename that from Fact Sheet to Myth Sheet as your £98 saving is in cloud cuckoo land. With the 10 panel system you quote the MCS approved annual generation is about 2000kWhr. If all that went into heating water you have displaced 2000kWhr of gas at about 4p per unit = £80. Due to...
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    Immersion Heater - PV electricity

    Think you will find it not so easy as you think. If you try to control down to say 100W accuracy the flash rate will then be only 1 per 36 secs. You need to let a few flashes go by so you are sure you are measuring it accurately. So you can't respond to small changes in power in less than a few...
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    Immersion Heater - PV electricity

  9. E

    Immersion Heater - PV electricity

    RS Components stock a Crydom cover but can't say if it fits that particular SSR model as I don't use it. They list a pad but have not had any in stock for months. I'd be very surprised if it did not have 1000s of volts of input to output isolation as all their simpler SSRs do. Look up the...
  10. E

    Immersion Heater - PV electricity

    This may be relevant. I have a granny annex with its own combi boiler for water heating. I’d like to draw its feed off the solar cylinder in main house but the pipe would be long. I am thinking that best bet may be to install a thermostat half way up the cylinder switching the boiler feed from...
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    Immersion Heater - PV electricity

    What you need is a thermal store rather than a hot water cylinder, some of which have coils at the top. But frankly I think it blows the cost benefit calc if you add in all the cost of this plumbing.
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    Immersion Heater - PV electricity

    OK I will try to answer. If they pay you 3.1p and gas is 4p then look at it this way. An immersion heater converts >99% of the electricity from grid or PV to hot water. A boiler at best converts 90%, if condensing. And if you add pipe loss it’s worse especially if short cycling and considering...
  13. E

    Immersion Heater - PV electricity

    Transmitting gas also uses a lot of power to pump it. Hopefully not much is lost to leaks.
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    Immersion Heater - PV electricity

    I don’t know what the saving is but bear in mind that using a gas boiler in the summer to heat water is not as efficient as you think due to all the heat losses in the boiler and pipework. In winter the lost heat may help to warm your house but in summer it is a total loss and a nuisance if your...
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    Immersion Heater - PV electricity

    I sympathise, but it shows the popularity of the topic (congrats to Paul for starting it) and the excellent solutions being offered all of which are much cheaper, but many work as well.
  16. E

    Immersion Heater - PV electricity

    Sorry my inbox was full. Please try a PM again.
  17. E

    Emergency lighting regs

    Bit off topic but same church building has mostly MIC cable to lights and sockets installed 15-30 years ago. An Electrician is quoting to add more sockets and lights and asked if we want MIC for new circuits. Why would MIC be used in such a building apart from the fact that it’s a lot thinner so...
  18. E

    Emergency lighting regs

    Many thanks for answers. Not quite sure what sort of building a church is classed as in these regs. If it was a true commercial building like an office/factory we would need loads of emergency lights to cover the whole seating area. But there does not seem to be any pressure from relevant...
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    Immersion Heater - PV electricity

    I had a 1975 bungalow like that but the pipes were set into the concrete floor with probably no lagging so it had been disconnected by previous owner as not efficient. There was a standard CH type pump to pump it round. Regarding the deadness of PV due to proposed FIT change can I encourage you...
  20. E

    Emergency lighting regs

    What are the laws /regulations on emergency lights? In a church hall we have lots of the 13W non maintained type that come on when the mains fails. The ones at exits have the green exit sign on them. But the joined on church (medieval type anglican) has one over main exit only with no green...

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