Home Energy usage?

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Moog
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Post by Moog »

I’m curious to know what other folks home energy usage is? I noted on another thread (about V2G) that the OP had a usage of 9000kWh/yr (without an EV yet) - this is 50% more than we use in our house, so was curious about what others use - is our 6000kWh/yr fairly typical, or low?

For context, we have a decent sized 3-bed detached, and are a family of 4, which includes two teenagers who think light switches only turn on and not off. I don’t think we are particularly frugal with our energy use, but was struck at how our was significantly less than mentioned on the V2G thread.

With our 6000kWh usage, we have solar PV and generate about 3000kWh a year, but consume about 2500kWh, so import 3500kWh. We don’t have a battery, and during summer most of the consumption is heating the hot water and also a heated towel rail that doesn’t seem to cut out properly (so likely wastes a fair bit)

26171D6C-4CAF-4499-A7B8-6AA18E0FAEFB.jpeg

This is without having an EV yet. I’m expecting that to add maybe 2000kWh a year. I’ve got a few more changes to make - will replace the Immersun hot water diverter with an Eddi which will work better with the Zappi i’m having put in, and also will replace the towel rail element with another that cuts out better.

Do others have an idea of their usage they’re happy to share? Do other folks pay attention to their usage, or I am in the minority? (I’m a nerdy engineer, so maybe it’s just me?)
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Daveion
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Post by Daveion »

Ours is 5,600kW Inc the EV. Just 2 of us in retirement. Large 4 bedroom family house.
Gas central heating. Our biggest usage is the laundry room. Tumble dryer, washing M/C and dishwasher. Our 3 children have their own properties but our tumble dryer tends to be a free for all throughout the Winter months. I think our usage is quite high for a retired couple.
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Post by Turquoise »

I was using about 2000kWh/year according to MSE cheap energy club account, but my current bill estimates my usage at 3100kWh/year. Some of that will be moving from a 2.5 bed semi to a 3 bed detached house and some will be because I was running an inflatable hot tub for a couple of month before the clocks went back. Maybe a bit of working from home too.

No EV yet, but planning to get a home charger, although work have started installed chargers so if they're free then I'll try to mostly use them. I'd also like to get solar panels eventually. I do get some solar heating at the moment though because on sunny days the underfloor heating in the kitchen/diner gets warmed up.
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Moog
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Post by Moog »

That’s interesting - you are both much lower than us.

I suppose what I don’t know is how much electricity we would consume if we didn’t have the SolarPV. We have gas central heating, but that is off usually from mid-March to Sept as the PV & Immersun does all that. If we didn’t have that our usage of electricity would be a lot lower but our gas usage would be a lot higher.
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Utumno
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Post by Utumno »

Moog wrote: Sun Dec 05, 2021 9:04 pm I’m curious to know what other folks home energy usage is? I noted on another thread (about V2G) that the OP had a usage of 9000kWh/yr (without an EV yet)

My Dad's electricity billed usage is 30,944.863 kWh/yr. I'm not trying to out-nerd you, this is just what the software says 😂

To be fair this usage is supplying :-

* A large rambling rural property
* A 20kWh PowerVault battery array to time shift electricity
* 4-ishkW solar array, which has generated 4182.37 kWh in 2021, so actual usage is probably 35,000 kWh/year once you add on the solar contribution.
* Heating and hot water via electricity (air source heat pumps)
* 2xEV's (M3 & Leaf) covering a combined 35,000 miles a year (my Dad might be 84, but he drives a lot in his Model 3)
* Old people who feel the cold

Billed consumption by month

Screenshot 2021-12-05 at 21.53.28.png

Time of use tariff impact

Screenshot 2021-12-05 at 21.58.49.png

Octopus Agile vs Deemed Profile (last 12 months)

Screenshot 2021-12-05 at 22.01.07.png

In comparison, our own electricity usage is much lower at 8,000 kWh/yr, though only half the property is electrically heated (the other half is oil, long story) and we don't have an EV yet.
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Moog
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Post by Moog »

Crikey - that’s the other extreme! I suppose with 35000miles a year EV usage that’s around 10MWh, so 20MWh for everything else, but no gas usage. I think I’m going to hunt out our gas usage.

I know what you mean about old people who feel the cold - my folks are in their mid-70’s and their house is like a sauna at times. My Dad has reached that age where he is constantly walking from room to room feeling the radiators and turning the thermostat up. He grumbles when he comes to ours as there’s no twiddly knob to turn up on the Heatmiser system.
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Scratch
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Post by Scratch »

It's an interesting thread but shouldn't it be split between those who also have gas and those of us who don't have gas?
We don't have a gas. Our heating and water is from an Air Source Heat Pump. Before we bought the ID3, our annual usage was about 7500kWh. I am anticipating that rising to about 10,000kWh but it's early days.
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Post by Smitten »

No gas apart from kitchen hob. We got our first EV in February of this year and switched to an air source heat pump in March for all heating and hot water. Therefore I only have 9 full months of figures since the air source heat pump was installed so, I have extrapolated current use in Nov to cover Dec, Jan and Feb which we can also assume to be cold but there may be some inaccuracy in there.

Total 8947 kWh use since March 2020 including EV charging. EV has done 6,500 miles. Four bed semi built circa 1934 with cavity insulation to extension, modern double glazing, 275mm insulation to roof voids. Kids have flown the nest so 2 people in the house and occasional visitors.

We still have a gas hob - mainly because we need to make some changes to the kitchen before installing an electric one.
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Smitten
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Post by Smitten »

Sorry - the total 8947 kWh includes estimated use for Dec, Jan, Feb based on Nov use.
Tour Pro S 77kWh, heatpump, 19" Andoya wheels, Glacier White
Ordered 21.8.21
Order No: 314400**
Build week 24 unconfirmed
Delivery Q4 2022 delayed from Q1 2022
Cancelled order and replaced with in stock Kia EV6
Smitten
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Post by Smitten »

Moog wrote: Sun Dec 05, 2021 9:04 pm I’m curious to know what other folks home energy usage is? I noted on another thread (about V2G) that the OP had a usage of 9000kWh/yr (without an EV yet) - this is 50% more than we use in our house, so was curious about what others use - is our 6000kWh/yr fairly typical, or low?

For context, we have a decent sized 3-bed detached, and are a family of 4, which includes two teenagers who think light switches only turn on and not off. I don’t think we are particularly frugal with our energy use, but was struck at how our was significantly less than mentioned on the V2G thread.

With our 6000kWh usage, we have solar PV and generate about 3000kWh a year, but consume about 2500kWh, so import 3500kWh. We don’t have a battery, and during summer most of the consumption is heating the hot water and also a heated towel rail that doesn’t seem to cut out properly (so likely wastes a fair bit)

26171D6C-4CAF-4499-A7B8-6AA18E0FAEFB.jpeg

This is without having an EV yet. I’m expecting that to add maybe 2000kWh a year. I’ve got a few more changes to make - will replace the Immersun hot water diverter with an Eddi which will work better with the Zappi i’m having put in, and also will replace the towel rail element with another that cuts out better.

Do others have an idea of their usage they’re happy to share? Do other folks pay attention to their usage, or I am in the minority? (I’m a nerdy engineer, so maybe it’s just me?)
Does that include heating or is that gas?
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Order No: 314400**
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monkeyhanger
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Post by monkeyhanger »

Jeez, 9000kWh?

We only used 3000 kWh of electricity per year prior to getting our 2 x ID3. 4 bed terraced townhouse.

Bear in mind that the missus dries clothes exclusively with a tumble dryer, we have a dish washer we're a family of 4 (the kids are forever leaving lights on) and there are 4 big tellies in the house that get a lot of daily use.

Every bit of lighting in our house is LED though, all but 1 of the TV is very recent (our old LCD telly, a 40" Sony bought in 2006 used to kick out tons of heat compared to the new ones, and probably used 3x the power). Heating and hot water is all gas, but the oven is electric. All appliances except the tumble dryer are A rated or higher. How do you use 9000kWh a year before EV use?
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Post by Scratch »

monkeyhanger wrote: Mon Dec 06, 2021 12:13 pm Jeez, 9000kWh?

We only used 3000 kWh of electricity per year prior to getting our 2 x ID3. 4 bed terraced townhouse.

Bear in mind that the missus dries clothes exclusively with a tumble dryer, we have a dish washer we're a family of 4 (the kids are forever leaving lights on) and there are 4 big tellies in the house that get a lot of daily use.

Every bit of lighting in our house is LED though, all but 1 of the TV is very recent (our old LCD telly, a 40" Sony bought in 2006 used to kick out tons of heat compared to the new ones, and probably used 3x the power). Heating and hot water is all gas, but the oven is electric. All appliances except the tumble dryer are A rated or higher. How do you use 9000kWh a year before EV use?
I don't think it's me you are referring to but my anticipated usage is probably going to be about 10,000kWh. This is a 3 year old, modern insulated, detached, 3 bed bungalow. We have an ID3 since Last September.
We have an ASHP. If you are thinking of getting one, as this government seems to want everyone to do, DON'T! Or at least, make sure you do your homework and with the energy crisis as it is, make sure you have a very healthy bank account.
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Post by monkeyhanger »

Scratch wrote: Mon Dec 06, 2021 12:24 pm
monkeyhanger wrote: Mon Dec 06, 2021 12:13 pm Jeez, 9000kWh?

We only used 3000 kWh of electricity per year prior to getting our 2 x ID3. 4 bed terraced townhouse.

Bear in mind that the missus dries clothes exclusively with a tumble dryer, we have a dish washer we're a family of 4 (the kids are forever leaving lights on) and there are 4 big tellies in the house that get a lot of daily use.

Every bit of lighting in our house is LED though, all but 1 of the TV is very recent (our old LCD telly, a 40" Sony bought in 2006 used to kick out tons of heat compared to the new ones, and probably used 3x the power). Heating and hot water is all gas, but the oven is electric. All appliances except the tumble dryer are A rated or higher. How do you use 9000kWh a year before EV use?
I don't think it's me you are referring to but my anticipated usage is probably going to be about 10,000kWh. This is a 3 year old, modern insulated, detached, 3 bed bungalow. We have an ID3 since Last September.
We have an ASHP. If you are thinking of getting one, as this government seems to want everyone to do, DON'T! Or at least, make sure you do your homework and with the energy crisis as it is, make sure you have a very healthy bank account.
Is that 10000kWh before or after buying an EV?

I cab only assume everyone with pre-EV usage 6-10000kWh of electricity.have a supercomputerrunning 24/7.mining bitcoin or all their heating is electric rather than gas.
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Post by Scratch »

monkeyhanger wrote: Mon Dec 06, 2021 2:21 pm
Scratch wrote: Mon Dec 06, 2021 12:24 pm
monkeyhanger wrote: Mon Dec 06, 2021 12:13 pm Jeez, 9000kWh?

We only used 3000 kWh of electricity per year prior to getting our 2 x ID3. 4 bed terraced townhouse.

Bear in mind that the missus dries clothes exclusively with a tumble dryer, we have a dish washer we're a family of 4 (the kids are forever leaving lights on) and there are 4 big tellies in the house that get a lot of daily use.

Every bit of lighting in our house is LED though, all but 1 of the TV is very recent (our old LCD telly, a 40" Sony bought in 2006 used to kick out tons of heat compared to the new ones, and probably used 3x the power). Heating and hot water is all gas, but the oven is electric. All appliances except the tumble dryer are A rated or higher. How do you use 9000kWh a year before EV use?
I don't think it's me you are referring to but my anticipated usage is probably going to be about 10,000kWh. This is a 3 year old, modern insulated, detached, 3 bed bungalow. We have an ID3 since Last September.
We have an ASHP. If you are thinking of getting one, as this government seems to want everyone to do, DON'T! Or at least, make sure you do your homework and with the energy crisis as it is, make sure you have a very healthy bank account.
Is that 10000kWh before or after buying an EV?

I cab only assume everyone with pre-EV usage 6-10000kWh of electricity.have a supercomputerrunning 24/7.mining bitcoin or all their heating is electric rather than gas.
10,000kWh including charging the EV. 7,500 without. (it's guess work for the EV consumption at the moment.)
No supercomputers here, just my iPhone. As I said, we have an ASHP (the future?) and they eat electricity at this time of year.
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Post by Smitten »

monkeyhanger wrote: Mon Dec 06, 2021 12:13 pm Jeez, 9000kWh?

We only used 3000 kWh of electricity per year prior to getting our 2 x ID3. 4 bed terraced townhouse.

Bear in mind that the missus dries clothes exclusively with a tumble dryer, we have a dish washer we're a family of 4 (the kids are forever leaving lights on) and there are 4 big tellies in the house that get a lot of daily use.

Every bit of lighting in our house is LED though, all but 1 of the TV is very recent (our old LCD telly, a 40" Sony bought in 2006 used to kick out tons of heat compared to the new ones, and probably used 3x the power). Heating and hot water is all gas, but the oven is electric. All appliances except the tumble dryer are A rated or higher. How do you use 9000kWh a year before EV use?
Sorry was that in reply to my post?

I think the key point in your reply is "heating and hot water is all gas".

Our 9000kWh is for an all electric house with an air source heat pump running pretty much 24/7 in colder weather and 1 EV.
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Post by shire-dweller »

Scratch wrote: We have an ASHP [Air Source Heat Pump]. If you are thinking of getting one, as this government seems to want everyone to do, DON'T! Or at least, make sure you do your homework and with the energy crisis as it is, make sure you have a very healthy bank account.
I am actually planning to replace our gas boiler with an ASHP next year, hopefully taking advantage of the £5K grant that I hear will be available from next April, for the same reason I am buying the ID.3: to reduce the amount of fossil fuel burning (climate crisis). I do not count on it being cheaper to run than a gas boiler straight away (despite the higher efficiency in kilowatt-hours), but using my crystal ball to predict the rest of this decade, it may well happen that gas prices will increase faster than electricity prices as the fraction of cheaper renewable sources in the national grid increases, and an ASHP may actually become cheaper to run than a gas boiler. I understand that the current increase in electricity prices is actually due to wholesale gas prices, as approximately 40% of the UK's electricity is produced by burning gas (past year average, source: https://grid.iamkate.com/ )

By the way Scratch, cost apart, how do you like your ASHP? :-) Is the house warm enough? Not too noisy? I live in Yorkshire and sometimes there are whole weeks of temperatures below zero and a fair amount of snow (I had never had to shovel snow from my driveway until I moved here!), and that is my only concern about the ASHP, whether it will do the job in freezing weather. Running it 24/7 in winter at 55ºC radiator temperature is OK for me, as the house is occupied 24/7. I have actually tested setting the gas boiler to around 55ºC and it is enough to keep the house warm even in the coldest days, so I am hoping it will not be necessary to replace the rads.
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Post by monkeyhanger »

ASHP was not in my considerations when my boiler was goosed last Tuesday due to my guttering being dislodged by high winds and sloshing some rain water down the flue.

£10k for a big noisy lump in the garden, but you can get £5k back in grant, and it costs 5x as much to run as a gas boiler because electricity costs 5x as much per kWh. Far too much money both initially and ongoing.

I ended up getting a Worcester Bosch boiler with a 93% efficiency rating for a fraction of that and it'll cost less than £500 a year to run. Until electricity is cheap 24/7 or gas approaches 2/3 the cost of electricity per unit, heat pumps will remain in the future for me.
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Splitty
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Post by Splitty »

Some glaring errors there Monkey, ASHP has a coefficient of 3-4 x input so costs are not comparable in the way you describe. This table gives the detail about the energy density of the various fuels and the current costs https://nottenergy.com/resources/energy ... omparison/.

ASHP are much quieter than you allude and have to be in order to be installed outside, generally they are much quieter than a boiler. There is also a strong possibility that there will be a move away from subsidising gas prices with electricity revenues in order to encourage the uptake of alternative fuels. And yes, costs are higher, but they will come down and in a few years you won't have a choice anyway.

Our choices are limited to Oil, LPG or ASHP and next year we will switch to ASHP, running costs will be practically the same as Oil and we won't have a monster smelly oil tank in the garden, nor will we be reliant of fluctuating oil prices and noxious discharges from the boiler flue.
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Post by Scratch »

shire-dweller wrote: Tue Dec 07, 2021 11:32 pm
Scratch wrote: We have an ASHP [Air Source Heat Pump]. If you are thinking of getting one, as this government seems to want everyone to do, DON'T! Or at least, make sure you do your homework and with the energy crisis as it is, make sure you have a very healthy bank account.
I am actually planning to replace our gas boiler with an ASHP next year, hopefully taking advantage of the £5K grant that I hear will be available from next April, for the same reason I am buying the ID.3: to reduce the amount of fossil fuel burning (climate crisis). I do not count on it being cheaper to run than a gas boiler straight away (despite the higher efficiency in kilowatt-hours), but using my crystal ball to predict the rest of this decade, it may well happen that gas prices will increase faster than electricity prices as the fraction of cheaper renewable sources in the national grid increases, and an ASHP may actually become cheaper to run than a gas boiler. I understand that the current increase in electricity prices is actually due to wholesale gas prices, as approximately 40% of the UK's electricity is produced by burning gas (past year average, source: https://grid.iamkate.com/ )

By the way Scratch, cost apart, how do you like your ASHP? :-) Is the house warm enough? Not too noisy? I live in Yorkshire and sometimes there are whole weeks of temperatures below zero and a fair amount of snow (I had never had to shovel snow from my driveway until I moved here!), and that is my only concern about the ASHP, whether it will do the job in freezing weather. Running it 24/7 in winter at 55ºC radiator temperature is OK for me, as the house is occupied 24/7. I have actually tested setting the gas boiler to around 55ºC and it is enough to keep the house warm even in the coldest days, so I am hoping it will not be necessary to replace the rads.
I quite like the idea of the ASHP, plus it's not polluting our neighbourhood. (smug face) The house is warm enough but there is a learning curve on how to set it up, if you are coming from a conventional boiler system. The ideal is that you keep the house at the same temperature 24/7. That was difficult for my wife as she is a fresh air fanatic. Even I like to open a window on occasion but that will upset the equilibrium of the heating system. ASHP systems can take a LONG time to get to your desired comfortable temperature and then you want to keep it there. Open windows don't help. (Covid 19 anyone?).
The rads MUST be replaced if they were designed for a conventional boiler system. They act differently. ASHP rads don't get very hot to the touch. They need to be bigger. Whoever is installing your system should advise on things like rads and, importantly, insulation. We were lucky in that we bought our house, new, 3 years ago, and it was specifically designed around the ASHP. Our builder was a small local company who value their reputation, so they were vigilant when the design was done.
The electricity bills are higher than our previous house with a gas boiler. Lots of people quote ASHP efficiency as 3:1. i.e. 1 unit of electricity gives 3 units of equivalent heat. Whilst true in mild weather, it drops during the colder months, therefore, more electricity is required to keep your set temperature. I just looked at ours and the efficiency for the month so far is 1.8:1.
We are in North Yorkshire.
If you need any other info of my experience, PM me.
So (smug face again) we also don't pollute with our heating AND we don't pollute with our ID3. I deserve an MBE or something, no?
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Post by Smitten »

shire-dweller wrote: Tue Dec 07, 2021 11:32 pm
Scratch wrote: We have an ASHP [Air Source Heat Pump]. If you are thinking of getting one, as this government seems to want everyone to do, DON'T! Or at least, make sure you do your homework and with the energy crisis as it is, make sure you have a very healthy bank account.
I am actually planning to replace our gas boiler with an ASHP next year, hopefully taking advantage of the £5K grant that I hear will be available from next April, for the same reason I am buying the ID.3: to reduce the amount of fossil fuel burning (climate crisis). I do not count on it being cheaper to run than a gas boiler straight away (despite the higher efficiency in kilowatt-hours), but using my crystal ball to predict the rest of this decade, it may well happen that gas prices will increase faster than electricity prices as the fraction of cheaper renewable sources in the national grid increases, and an ASHP may actually become cheaper to run than a gas boiler. I understand that the current increase in electricity prices is actually due to wholesale gas prices, as approximately 40% of the UK's electricity is produced by burning gas (past year average, source: https://grid.iamkate.com/ )

By the way Scratch, cost apart, how do you like your ASHP? :-) Is the house warm enough? Not too noisy? I live in Yorkshire and sometimes there are whole weeks of temperatures below zero and a fair amount of snow (I had never had to shovel snow from my driveway until I moved here!), and that is my only concern about the ASHP, whether it will do the job in freezing weather. Running it 24/7 in winter at 55ºC radiator temperature is OK for me, as the house is occupied 24/7. I have actually tested setting the gas boiler to around 55ºC and it is enough to keep the house warm even in the coldest days, so I am hoping it will not be necessary to replace the rads.
Ours was replaced in April so this is the first winter. We have underfloor heating to ground floor which is perfect and rads upstairs. A heat loss survey is part of the installation process so make sure you are well insulated. Works best with small changes in temp over long periods so heating the house is gradual. The house is near silent when it is in operation. Small amount of noise, similar to a fridge when it starts but much quieter in use and anyway, who is going to stand outside in the winter checking the noise? My gas boiler made more noise inside the house. This makes a small amount outside which you can't hear above background noise in a city. We have underfloor heating hot water temp set at 40 degrees C on a weather compensated curve. Rads are set at 50 degrees. We didn't have to change radiators. Bedrooms are maintained around 18 degrees C and ground floor around 20.5C. Nice even heat. They work harder on coldest days but are in use in Sweden and Norway and can still generate heat in -20C. We also made the change for environmental reasons and were one of the few getting the Green Homes Grant.
Tour Pro S 77kWh, heatpump, 19" Andoya wheels, Glacier White
Ordered 21.8.21
Order No: 314400**
Build week 24 unconfirmed
Delivery Q4 2022 delayed from Q1 2022
Cancelled order and replaced with in stock Kia EV6
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