Lmst

11 Years of Home ASHP, Kingston-upon-Thames London: Case Study - Learn from a home air-source heat-pump experience in greater London, UK, a decade in. #ASHP #heatpump - https://www.earth.org.uk/ASHP-case-study-Kingston-UK.html

Looks like the total net I paid for energy in 2025 was (ignoring standing charge)… £11.

I suspect if I bothered increasing the ancient, pitiful 5cm of insulation in the attic I could get that to break even.

#solar #battery #pv #ASHP

Given the increasingly colder weather in my part of the UK, I've decided it is time to turn on the #Daikin #ASHP for heating.

The internal temperature hovers around 18°C during the day, meaning if I let it go lower, there's a higher risk of getting a chill or genuinely feeling cold. And there's no point saving a bit of money if you're putting your health at risk.

So I'll re-enable the schedule for 20°C during the day, and 18°C as the setback overnight.

It's sufficiently cold that I need the heating on, but it won't be stressed or use a lot of electricity as it really only has to help offset a few degrees for now.

I tend to run the #ASHP for heating from sometime in October through to sometime in April, but that is, of course, very dependent on the weather.
But once I enable the schedule, I forget about it entirely for the whole colder months.

The good news is that the majority of my electricity is via off-peak pricing, stored in my batteries. So costs won't be horrible.

@sean
I'm into year 4 of #solar (4.8kWp, split 50/50 across East/West roofs), year 3 of owning an #EV, and year 2 of an #ASHP

I've been an electric-only house now for a couple of years, and my overall spend across all elements is circa £650 per year.

The removal of the gas supply and meter means the standing charge I was paying for that in effect pays for my annual #ASHP service from #OctopusEnergy.

During the summer, I slowly create a positive balance with #Octopus via solar exports, which usually takes until the December bill to be used up.

I went with solar and battery first, to give me a baseline capability to generate and use local energy as I want.

For me, this is less about any profit or payback and more about wanting to ensure I've done my bit by not burning anything at my house.
I can't assure the 100% renewable energy from #Octopus is truly that, but I can make sure I'm not adding to the problem from my own house.

Once you have this stuff, even if it's not wholly integrated (so there's a bit of a management overhead), it's something you'll never go back from.

My mid-80's link detached 3-bedroom house is nothing special, and I'd already done some improvements with new windows and doors, plus new loft insulation and an insulated loft hatch.

Another #FreeElectricity session for #Octopus customers in the UK today, from 14:00 to 15:00

Extra good news is that there is a double session tomorrow, so 2 hours #FreeElectricity from 12:00 to 14:00 on Sunday 7th.

Will plug in the EV and see if #IOG charges it or not, plus load shift a few things around to make use of these sessions.

So long as it's useful energy use, and not wasted, then it's all good. Will move cooking lunch, use the tumble dryer, plus maybe some solar battery forced charge from the grid if I've any spare capacity.

I won't be doing things like #ASHP DHW tank heating because that may be wasting electricity, as water will likely still need to be heated overnight as usual in the schedule.

So conscientious use of the free electricity, above my normal usage for those hours, is the name of the game.

ASHP: Domestic Air-Source Heat Pumps - Ensure that your ASHP installation is greener than mains natural gas for central heating and hot water (CH/DHW) in the UK. #ASHP #heatpump - https://www.earth.org.uk/air-source-heat-pump.html

Great post on the @energystatsuk website looking into the pros and cons of different electricity tariffs for running a #heatpump - also talks about the Havenwise app for optimizing control.

https://energy-stats.uk/best-heat-pump-tariff/

#octopus #octopusenergy #ashp

This is a brilliant idea in #worthing that I hadn't heard of - huge air source heat pumps to provide district heating

https://worthingheatnetwork.co.uk/about/

#ASHP

11 Years of Home ASHP, Kingston-upon-Thames London: Case Study - Learn from a home air-source heat-pump experience in greater London, UK, a decade in. #ASHP #heatpump - https://www.earth.org.uk/ASHP-case-study-Kingston-UK.html

One of the four days in UK when you wish you had cooling in the house! Are air source heat pumps reversible? #ASHP ?

ASHP: Domestic Air-Source Heat Pumps - Ensure that your ASHP installation is greener than mains natural gas for central heating and hot water (CH/DHW) in the UK. #ASHP #heatpump - https://www.earth.org.uk/air-source-heat-pump.html

Good news! The UK Government has removed one of the restrictions on heat pumps!
https://www.bbc.co.uk/news/articles/c3e5plqke3no

Hopefully this will mean more people being able to install energy efficient heating and reduce their dependence on gas.

#green #ASHP #EngergyTransition

ASHP: Domestic Air-Source Heat Pumps - Ensure that your ASHP installation is greener than mains natural gas for central heating and hot water (CH/DHW) in the UK. #ASHP #heatpump - https://www.earth.org.uk/air-source-heat-pump.html

In my part of the #UK, we had a couple of good #Solar days on Tuesday and Wednesday.

Certainly helps to keep the batteries topped up whilst still using the #ashp for heating as it's still cold.

Today is warmer, but much wetter with clouds both low and high. Meaning today is a bad day for #solar. My forecast is for a whopping 1.2kWh which will be a struggle and likely a missed target going by the day so far.

February is never a brilliant month for solar, but it does start to improve on better days because the angle of the sun and the amount of daylight is better.

Had a notification on my #Daikin #ASHP for a firmware update. Get maybe 2 or 3 of these a year, so they are improving things over time including the Onecata App.

Now on User Interface 7.7.0

However, there seems no chance any of these updates will actually promote energy generation and consumption in either the App or the Cloud API.
You can only get energy generation information via the MMI Control Panel, which is a pain because it's not the easiest interface to work with and for my setup, it's out in the garage.

I guess I should just shut up and be grateful I have heating and hot water and am not burning stuff at my property to achieve that.

I tweaked my #Daikin #ASHP heating schedule yesterday to try and get the house up to temperature all within the off-peak hours of my tariff from #OctopusEnergy
I didn't get it quite right, partly because I was too aggressive with the start time, and partly because it was another cold and frosty night.

I've added another hour to the schedule so it starts earlier. This should get the house up to temperature all within the off-peak period and not impact my batteries too much.

On the colder days of the year, as in anything less than, say, 4C during the day, my battery capacity isn't sufficient to run the household load and the heat pump heating for the entire day/evening until the start of the next off-peak period.

It isn't a big deal because there's perhaps 6 to 8 weeks a year that this happens. Certainly not enough to consider investing in more battery capacity which would never be worth it financially.

I benefit from the off-peak tariff, which is enough to offset many of the costs.

#ASHP

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