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Who's your electricity provider and what's your tariff?

Mars · 2021-03-02T22:09:42Z

Electricity tariffs are a key component of running costs when it comes to heat pumps. Please share who your electricity provider is and what tariff you're on.

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Electricity, Tariffs, Monitoring & Providers

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Derek M

(@derek-m)

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23/11/2021 7:59 pm

Posted by: @justinsb

@kev-m TBH, I'm now thinking that I should go Economy 7, as my Solar Panels ought to take care of much of the daytime usage, hopefully.

Hi Justin,

I'm afraid that your solar PV system will not provide much of the power that will be required by your ASHP, so the higher tariff of the daytime electricity may make it more expensive in the long run. Your ASHP will probably be using more energy overnight, so the sums may add up.

I am about to post the modelling tool spreadsheet under Kev's trend, which you may find of use in making your decision.

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batalto

(@batalto)

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23/11/2021 8:06 pm

@derek-m I'm finding my batteries are very useful in bringing down my current tariff. However for those without batteries I think the payoff may be marginal. I imagine you'll end up being broadly flat in terms of average price

12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE

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Kev M

(@kev-m)

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23/11/2021 8:30 pm

Posted by: @justinsb

@kev-m TBH, I'm now thinking that I should go Economy 7, as my Solar Panels ought to take care of much of the daytime usage, hopefully.

The break even point is about 70/30 day/night without PV (which is also 7/24 give or take). I'll have to look at my numbers.

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Derek M

(@derek-m)

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23/11/2021 8:35 pm

Posted by: @batalto

@derek-m I'm finding my batteries are very useful in bringing down my current tariff. However for those without batteries I think the payoff may be marginal. I imagine you'll end up being broadly flat in terms of average price

Hi Batalto,

You are probably correct. I have considered batteries and some additional solar panels, but since we are still using the gas boiler for the major heating load, I'm not certain of the benefit.

My other concern would be if tariffs like Octopus Go will still be available into the future, given what has been happening in the energy markets.

This post was modified 4 years ago by Derek M

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batalto

(@batalto)

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23/11/2021 8:36 pm

@derek-m to be honest, they've delivered a lot of value just with the solar. Adding in Go just gives me even greater benefit

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Mars

(@editor)

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Topic starter 27/11/2021 12:12 pm

We’ve been without power since midnight courtesy of storm Arwen. Latest update is we’re back on tomorrow with power. Fires are on.

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batalto

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27/11/2021 12:44 pm

@editor that makes me nervous as we have no fires... Then again, we aren't exactly remote

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Mars

(@editor)

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Topic starter 27/11/2021 12:58 pm

On the plus side we’re not paying 24p/kWh of power today 😀

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Mars

(@editor)

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Topic starter 27/11/2021 4:28 pm

Relief – power is back. Heating back on.

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batalto

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27/11/2021 11:08 pm

@editor if it makes you feel better, we've used about 80kw today with heating, hot water and general life - so you avoided all of that

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Justin

(@justinsb)

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28/11/2021 7:58 am

Yup. We pulled 63Kwh in the past 24 hrs too, so it's not a cheap time for ASHP people...

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Mars

(@editor)

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Topic starter 28/11/2021 8:31 am

@justinsb, it certainly isn’t going to be a cheap winter for heating using heat pumps. We had a few days in February where we exceeded 100kWh which cost us around £11 - this year it’ll be £24. Crazy times.

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