Thoughts on Electricity Supplier / Tarriff for GSHP new build?

Hintza
Hintza Posts: 19,420
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edited 23 January at 2:42PM in Heat pumps
We are just about to complete a new build (if/when I can get my loops in the ground).

We are in Scottish Power area paying the extortionate standard tarriff quarterly at the moment (currently in a caravan).

Current usage is about £100/ month. (8250Kw/h per annum) I work from home.

Do I want economy 7 for a GSHP? Apart from washing machine and dishwasher I can't really think of anything else that will run at night.

Any thoughts or suggstions would be most welcome.

Comments

  • macman
    macman Posts: 52,955
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    You'll only make E7 pay if you have night storage heaters, and can use at least 30% of your total usage on cheap rate.
    You're not going to do that with a w/m and d/w!
    No free lunch, and no free laptop ;)
  • Hintza
    Hintza Posts: 19,420
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    macman wrote: »
    You'll only make E7 pay if you have night storage heaters, and can use at least 30% of your total usage on cheap rate.
    You're not going to do that with a w/m and d/w!

    Thanks.

    My limited research was saying the same but wanted to check I hadn't missed a trick.
  • Hintza
    Hintza Posts: 19,420
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    edited 13 October 2012 at 9:10AM
    I thought I would update this thread after 10 months moving into the house.

    Electricity Usage is:-

    23 Feb - 23 May 27.6 kWh/day (This was change over period to a new supplier and I am only using figures since change over)
    23 May - 14 June 17.0 kWh/day
    14 June - 11 July 20.8 kWh/day
    11 July - 15 Aug 21.1 kWh/day
    15 Aug - 07 Sept 22.3 kWh/day
    07 Sept - 10 Oct 22.5 kWh/day

    Remember I work from home.

    The simple things that have changed are more windows so less lighting and we have moved to Haler downlighters in most areas. But still have 2x 25W wall lihghts which are looking a tad expensive now.

    The GSHP is proving great and I am now wondering why we bothered with radiators upstairs. I had them on when we first moved in but it was just far too warm in the bedrooms. (I guess they might be handy if we have a winter like 2010/11 but apart from that I doubt we will use them)

    The very expensive stove in the sitting room is looking more and more like a white elephant, I will have to light it before the year is up to check it all works but it has never been on.

    You might think that the house is super insulated but it isn't that great:-

    Energy Efficiency Rating:- Current C (77), Potential C (78).

    The Energy Performace certificate suggests energy use per square metre of floor area at:- 135 kWh/m2

    House area = 142m2

    So they are suggesting energy requirements of 19,170 kWh/annum

    I reckon we will come in at around 9,000 kWh/annum

    Someone's figures don't add up here.

    Moved electricity to Ovo which resulted in about a 25% saving straight away (Current cost ex VAT = 0.0928p)
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