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Off-grid

Discussion in 'Plumbing and Central Heating' started by norseman, 11 Oct 2021.

  1. norseman

    norseman

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    Thanks for your reply & continued interest C, I'll look into those alternatives. I will also search for an electrician with experience in off-grid, which I suspect won't be easy :(

    nb. I see you reside in Herts, my family roots are in Hatfield & I lived there until the age of 18.
     
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  3. crappy

    crappy

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    No worries. Interest is because I had the same setup as you a few years back - solar charged batteries by day, ran house by night. I'm about to move house and planning a bigger version of it so doing a lot of swatting.
    I can recommend a guy who I used last time and again using now. Will send details
     
  4. norseman

    norseman

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    I took a peek at your recommended contact, but they are solar specialists so not what I'm looking for at this time ... maybe later.
    One question I should have asked, with regard to your stated success with a 500w inverter, is what were your earthing arrangements ?
     
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  5. crappy

    crappy

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    Earth? Naaa, that's for sissies :)

    In fairness, that was something I had not appreciated when I initially set it up. My inverters had an earth tab which I grounded to the house supply earth bus. I moved the lighting circuits and low-power plug rings to the new DB which was cross-fed by a change-over contactor which was energised by the inverter. While online, the contactor would pull in, switch said circuits over to inverter. When inverter dropped out due to battery voltage / fault, the contactor would drop out and switch to mains. I had a timer in to stop chatter; the inverter had to be online for 120 seconds before the contactor was energised.
    This was a full switch over of L/N. earth always common.

    Sorry - you asked about earth :D
     
  6. norseman

    norseman

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    Finally sorted, the boiler is now igniting normally & can be switched between grid/off grid without the need for re-setting. All that was required in the end was a bonding of the earth & neutral on the inverter to keep the boiler's flame failure device happy.
    Tomorrow I will fully charge the battery (new in February this year, but only used for tests of the inverter) & we will be prepared for any power cut ... which according to Sod's law may never come, hopefully :whistle:

    I may go down the dual-fuel generator (we have a LPG installation already) route eventually, meantime many thanks for everyone's valuable advice, it has been most appreciated.

    nb. Crappy ... I hope the solar planning at your new home goes according to plan.

    Regards
    N.
     
    Last edited: 1 Nov 2021
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  8. Gasguru

    Gasguru

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    We told you that back in February :)
     
  9. norseman

    norseman

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    Yes I know you did, but I wanted to try more straightforward possibilities & avoid possible damage to a boiler that is still under warranty.
    Even at my age there are still things that I will confidentially dive into, but mains electrics isn't one of them ... so I'm not in the least offended when you say 'I told you so' :oops:

    Thanks to all once again.
     
  10. Gasguru

    Gasguru

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    I'm about to do the same with an old modified UPS I have...we're all turning into preppers.
     
  11. norseman

    norseman

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    Don't blame you, things are not looking rosy & with winter approaching ...
     
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