How Much Has My 'Eco House' Cost? Heat Pump, Solar PV & Home Battery 

I bought a house which had coal-fired central heating. I bought a heat pump. The payback is that the house isn’t always cold now, and we don’t spend all our time shovelling coal. Sometimes the payback is more than just financial.

No gas standing charge

We've had panels for nearly five years connected to a small 3.3 kWh battery. Our heat pump's been in since December 2022. I confess to not having done all the sums on running costs. A larger battery would make sense. The solar currently fills it and heats the water along with cooking. Our oil boiler was in need of replacement so a pump was the way to go. No mains gas. We also get a few bob from exporting surplus electricity.😊 Why all new houses don't have panels is just silly. Keep up the good work. Peter

You've been an EV driver for a few years now. You haven't factored in the fuel savings cost, being able to take advantage of any overnight tarrif. In our case that has been an extra £300 a month. Easily forgotten when you're far into the transtition already!

lol. Thanks for fixing the £10.2k ;)

I'm 71 and had solar since 2015 then battery next heat pump , had the gas meter removed today i did it because it makes sense and i love the tec and future proofing against price increases. it more money in your pocket now as you yearly wages goes further for you to save or spend on other pleasures

Canadian here (but originally from England): we installed 10.5 kw of solar panels about 5 years ago. No rebates for us back then, but we haven’t paid for electricity since we installed them (including charging our Tesla). No battery or heat pump for us yet, but we’re gradually ridding ourselves of gas appliances; next ones to go will be our water heater and cook top (hob).

I looked at all of this as an investment in the house. Interest rates have been very low and were that way for a long time, so any savings made hardly anything. Investing in Solar first in 2011 and I was lucky to get the FiT payment which paid my expense back in 8 years. It was over 12k at that time for 4kWh of Solar PV. Later in 2020 added extra solar and a Tesla Powerwall. At that time most of our West facing solar was being used up and as we were now at home most of the time, a battery and the extra 4kWh solar on the east facing roof made sense, for that to fill the battery. In 2018 I was paying over £300 per month for electricity, LPG and petrol. These costs have gone up a lot since then, yet I have added an ASHP in Feb 2022 and have had an EV for past 3 years. Now for the whole home it is £90 per month including Home use, cooking, heating and 10,000 miles in my EV. My battery allows me to use 78.5% night rate of 7.5 pence per kWh averaged over the year.

Solar these days is approaching “no brainer” territory. Some panels I’ve seen for £50. In terms of cost per sq metre, it’s approaching fence panel and roof tile costs. Now that doesn’t including mounting costs, but it’s easy to imagine these becoming the ‘Goto’ material of choice for home upgrade projects, without even hooking up the electric cables! But mounting the panels in my experience is about 85% of all the hours anyway. Once mounted, easier to get an electrician to polish off the job.

Thank you EV Man! Really appreciate your content!

Once you've gotten the gas all the way out of the house try asking your insurance company if they want to do you a better deal. I know its so common to have gas that gas explosions aren't as such considered an Insurance expense/risk but it might knock 10£ of and all money is good money.

Expensive battery ! 5KWhr 48V lithium Iron Phosphate LiFePO4 cells are below GBP 800 each now.

Well done! This is exactly the sort of information that is very useful.

I have all of that although generally set up rather earlier. The overall effect was that the kit cost me more but the FIT and RHI returned more. We retired and had a lump sum which would have diminished with inflation so we invested in reduced future bills. The actual trigger however was ecological. Reduced carbon footprint. The savings were a bit of a gamble that paid off. We could only afford the setup because we had the cash, demonstrating that the less well off are at an unfair disadvantage.

I’m in a new-build (2 years old) that sadly has a gas boiler, so won’t be switching to a heat pump any time soon. But I’ve invested in a cooperative ownership solar park through Ripple (not sure if it’s allowed to mention this) that should provide 100% of current electricity usage. In future it will make sense to balance that with a share in one of their wind farms and time will come when I replace the boiler with a heat pump and batteries.

I'm getting there albeit slowly. I bought solar panels back in 2015, (Solaredge) 16x 250w on an east west roof. Got my first EV in 2019 and then went for battery storage. Being a DIYer I went with a 5kWh Victron MultiPlus inverter and a Fogstar 15.4kWh LiFePo battery. I now have the ability to add more solar to the Victron Total cost so far; Solar was just over 6k I do get FIT payments of about £700 a year, which means they've just paid for themselves on FIT alone and £4200 for the battery storage. I am going to install heat pumps, which i started 10 years ago, but mine will be air to air, so i can have cooling in the summer, that will just leave a water heating solution to decide (heat-pump or immersion) and then get rid of gas and the associated standing charge.

Octopus cosy 6 heat pump being installed here currently 🎉 We have 4kw Solar ,5. Kw battery and charge overnight an EV 1200 miles a month. It’s crazy ,our usage for May was £37 (£15 of which is standing charges ) no hard sell required. Our payback was 4 years but that was £10 years ago and now we are fortunate to be well in the green. Like you our boiler needs replacing so we have been in talks with Octopus about the cosy 6 trial which after the BUS grant will be considerably cheaper than a boiler replacement quote we had.

Hi, I have been following for a while now you are doing good work. But have you had a blower door test? Are you heating the house and it all going out the "window" What upgrades have you done to your home Your's john

My solar install was £5000 8 years ago for 4kw (but get the £1000 a year FIT - so a no brainer). But then added £4000 battery £3000 more solar panels. But my DD to Octopus is £20/month for electric on a 5 bed detached house + I run an EV off it - ok, only 5000 miles/year. Even without the FIT I'd be £3000/year electric saving. So I'm in profit for sure with the FIT included.

I've had a Growatt Battery system (6.5 KWH) for just over 2 years. It cost £3800 and has already paid back £1000 (2 years in). It charges at 7.5p along with my EV. You're video showing the maths of home storage convinced me to get this. I think it's been a great decision and helps balance the grid. I've just bought 2 solar panels (£65 each) to put on my woodsheds and they are bringing in 2-3 WKH a day, not cost effective but brings a smile to my face knowing that the leccy to run the telly is free.

People look into the payback period because having any of these systems makes no difference to comfort or experience. For most of us it is entirely a financial instrument, so ROI is key. Because ROI is capped at whatever the original cost was, there is no need to bring the electricity and gas usage to zero, just focus on low hanging fruit. Recently was looking into adding more panels and battery and it doesn't make sense as payback on that part would be over 20 years.

Thank you EVM - your videos are a breath of fresh air! In my case, it’s heat pump plus solar with no battery (yet) as I can’t get a time of day tariff. my wife and I have an EV each so generally all spare solar goes into the cars (via the Zappi). Total cost (after grant) was £12.5k. Not including the FiT, our savings are £500 per year on energy bills (which now includes charging 2 EVs), about £150 per year on standing charge saving (having removed gas) and £750 saving on petrol. So about 9 years pay back. Not a stonking financial investment, but equally it’s still paying for itself in the long run so it works for me!

I guess one problem with replacing your gas boiler with a heatpump when it needs replacing is time. Its a cold January day and the boiler packs up. You call somebody out and they say its not worth repairing. So do you A) bite the bullet and get another gas boiler fitted within a few days. Or B) get a survey for a heat pump and wait 3 to 6 months for somebody to actually fit it. I have just been replacing my radiators to bigger ones as I have been decorating (hate having to paint radiators, they always look rubbish). So I can now run the gas boiler at lower flow rates to save money and hopefully when the day comes I'll be in a better place when its time to move to a heat pump .

Thank you for standardising your numbers on the whiteboard, it was really bugging me.

I fell in love with the idea of alternative power after watching a lumberjack years ago on TV. Middle of nowhere he diverted a tiny stream to fit a small water wheel, powered his whole workshop for free, put it all back as was when he'd finished 🤯 It's essentially new tech making use of old ideas and natural resources without causing damage, if done properly, what's not to like?

Basically, you're getting a $1800 return on $17500 invested, guaranteed every year and likely to increase with time. That's a guaranteed 10% return which matches long-term stock market growth (if your nerves can withstand the fluctuations), it's a return that is likely to increase and it helps the planet. As long as you buy quality equipment with 10+ year warranties, it's a no brainer. Over the past five years, I have basically done the same - my last electricity bill was $35 (about £18) per month - I live in Australia, so the solar works a bit better! 😃

I think it is a bit of a no brainer even though the capital cost has gone up and interest rates (for savings) have risen. Unfortunately the installation costs in older properties is likely to be substantially more when you take into account the need for far better insulation for heat pumps to work effectively and the need for perhaps smaller bore piping and radiator replacement. I also worry that the maintenance costs may be higher and parts of the system - solar panels, inverter etc - may not have as long a life as a conventional gas/oil system.

You make a fair comment about wages and labour costs of installing the system I'm actually from a town, not too far away from yourself but I bought a house in Manchester and the wages for me are higher here, sure, but equally, the cost of labour is so so much higher than in Yorkshire. It's why when I got my flat roof top insulation done, I got a company outside of the city

Appreciate the honesty!

You forgot your petrol savings… and that’s part of the whole electrification deal. When I go heat pump I’ll need to think about additional batteries as well… I can’t imaging GE and a.n.other supplier playing nicely with each other though.

I am in the North East of Scotland and I installed a 12.3pKW solar system with 10kw inverter and battery from SolarEdge, cost me £21k then installed a Heat Pump but with the grant and selling my previous system and changed radiators I made £700. In total I am expecting a pay back in ~6years! It's a no brainer!

Makes sense when you have older systems that need to be replaced. Or if you have the financial means to upgrade. For my Brother he lives part time on the Gulf Islands and Solar makes sense for him.

I really like what you’ve done. I believe the latest recommendations in the uk are to not put lithium ion batteries inside the house. I’m guessing this will trickle through to cost of house insurance. I also suspect the batteries will require changing after 15 years.

Lovely orange patch leads 😉

Great content thanks. We have libbi battery 18kW usable, small solar array and viessmann heat pump. We run and electric car which averages 500miles a month and an electric van which covers around 1200mile a month. No gas supply. May electric bill £ 122 including standing charge. Average electric unit cost 8p.

Being a real estate salesperson in new Zealand i understand people's attitude to "payback". People here move on average every 5-7yrs so a big investment's in infrastructure that you can't really take with you is a factor. A new kitchen is probably more desirable unfortunately than a solar system for adding value to a home for resale - sad but true!. I've gone to a heat pump water system and ducted heating and cooling, I definitely want solar, just because i think it's the right move, rather than payback, especially with 2 EVs not to mention our dumbarse government have started "taxing" EVs with road user charges and removed rebates. Go "green" new Zealand! 😝

I think Octopus are doing free installs of heatpumps in some cases on 3-4 bed houses - the £7500 grant pays for the heatpump and installation.

Love the vid's keep up the great work 😊

My parents are finally looking at a heat pump system, after many years of my dad point blank refusing the idea. Their big issue was they use bottled gas, and that is now eye wateringly expensive. Just letting them do the research on what grants that are availble to them.

The after should include lost interest of, say, £500 per year, so the payback is slower. That said we have solar, battery, and Thinsulate 3m window film, but the reason was primarily environmental.

I recently got heat pump quotes from Octopus and Heatable for a 3 bed house and they quoted me £5,500 and £7,500 resp.

good video for people wanting to save money in the long run.. well worth it👍

Best not to lump PV+battery with heat pump. The latter (currently) hardly save any money, unless you are comparing inefficient/broken system with a new one. Gas prices need to be above 25% of electricity prices for it to change, and that assumes a good HP installation.

I should have had a bigger battery / inverter, but I only had a 5. Even so, i pay £1 a month and pocket £100 this year when the spring was bad for solar. That £100 will pay for my ev charging so effectively covers my motoring. I have to have a new oil boiler, and will have air2air heating instead… so I will use maybe a few hundred in electricity instead of oil. But the hardware cost is no different to a replacement boiler. The saving a/c to my neighbours is 1-2 000 a year in electricity costs, so I will return my investment in less than 6 years. Less given the high cost year cost me nothing.

Couldn't agree more about the "it doesn't make financial sense" brigade. I've abused the environment in my early life and I see this as a kind of payback to the environment. If only we all did whatever we could to leave the planet a better place thsn we found it.

Are your saving greater if you factor in recent higher energy costs and the benefits of charging your electric car at home? That is, what were your savings in yr1, yr2, yr3 etc. ?

I often hear the “when will this pay for itself “ question about our solar, heat pump, insulation, and EV from people who just spent $20,000 on a kitchen remodel. They have no way of knowing if that kitchen upgrade will ever pay off but they value the results just like we value the results of the solar, heat pump and EV.

I only have a small stable block conversion, I have solar panels and I have had batteries installed, I admit I know absolutely nothing about heat pumps or what their function is, I have well and truly insulated my house, my solar panels are on a feed in tariff, I only have a hot water tank, I don't actually have any heating as such apart from a towel rail as my home remains warm in winter and cool in the summer. That extra £17500 you spent on all of those extras will ADD more than that to the value of your property should you decide to sell up, let alone the savings I've made, you're saving more than me, I'm in an all electric household too As far as electric vehicles go, I can't afford the initial purchase price, I don't have access to off road parking, the infrastructure is nearly non existent in this area and I'm not credit worthy so I can't pay for electricity to run an electric vehicle. Sadly I can't afford or be able to run an electric vehicle I had my installations not just to save money, but I'm around 10 years away from retirement and I'm thinking practically before it's too late, whilst I'm still working, I'm a single person, I don't see a pension covering the rising costs by the time I reach retirement age

By way of comparison and for information to those considering. I've had solar (14 panels) 13.5kW battery (GE AIO) and an EV charger installed 3 weeks ago. The total cost was £13,800 I was quoted £1000 less by another company but i chose a larger established company who i felt more comfortable, with and didnt want any deposit. Im having a heat pump fitted to repkace my gas combi boiler. I am in a new build so the gas boiler is only 6 months old but is still a no brainer to have a heatpump fitted as I have been quoted £628 by British gas...i have two people lined up to buy my gas boiler for £1000! So, as I say a no-brainer for me! I have deferred my hp install ad my preference is for the cosy6 which I am told is 6-8 weeks before installs commence (slthough a poster on here is currently having one installed 🤔). Mainly for the aesthetics but also because I like to embrace new technology.

Just got all this installed in May so no idea what I will save. But so far it’s looking good. Had to get all the radiators and piping replaced so more expensive but in Scotland so got an extra 2500 grant for solar and interest free loan for most of the rest. Had the smart meter replaced as it couldn’t handle exporting plus it was reporting twice as much on the 30 minutes compared to the monthly readings. That and 3 cars means it will take me months to get any reasonable idea of how much I am saving.

Very interesting, thanks for doing this. Did you include the fuel savings from switching from ICE to cheap nighttime or 'free' solar electricity charging EV? Also did u include any savings of selling solar back to grid?

I've gone the other way and spent on insulating and Double glazing. For many that will sound strange, but in Australia we live in large energy sieves. By plugging up the holes we can now go through the heating season with a 45% decrease, based on the previous 2 years bills. So I ask is there anything you can do to improve your numbers in this department Andy?

It would be interesting to see this expressed as return on investment over various periods of time, factoring in how long your warranty periods are to get a sense of the risk. Saving up to 1,800 per year from after tax income is excellent - like earning an extra 3,000 per year for many.

Even on your very generous man maths, it’s a no brainier…Saving £150 per month for life, indexed linked…

Is the inverter a True Sine wave inverter? "Pure" sine wave is just marketing. But non-sine wave inverters are really risky for appliances that have a motor in it. Can you please confirm this?

Just about to swap my diesel for an EV and have been crunching the numbers on electricity tariffs. My roof is no good for solar and no home battery so for me it's just the EV. Have to say unless you can schedule virtually your entire usage to cheap rate periods EV tariffs are a waste of time in isolation

I don't remember EVM saying how many kW of solar he was getting for his £4,000, or his supplier, but I can't find anyone who'll do a small 4kW system for less than £7000. How is he getting these prices? Ditto £10,200 for 19kW of batteries is incredibly cheap. I've been quotes nearly double that in south Oxfordshire by 3 different firms. The payback period ought to factor in that the solar inverter will need replacing after 10-12 years and the batteries may last no longer than 10 years and will see declining performance. The ASHP also seems super-cheap. Is it a very small pump, because the house is already super-insulated? What is its SAP or heat loss rating? Nice video but there's loads of missing data here I'm afraid.

Don’t forget the cost saving when your gas meter is removed.

This system will work on a new build designed to maximise the savings. But you need a slightly larger property for a plant room to house all the gubbins along with underfloor heating . I've got solid walls i.e no cavity and paid 10K (no grant) for exterior insulation in 2020 new gas boiler was 3K, no hot water tank. boiler in kitchen cabiente no extra space needed.I put 50 % of ground floor on u/floor heating as part of an extension and remoldeling. My energy bills are around 2.2K with gas being 1K. Pay back for my exterior insulation is north of 20 years. My maintenance costs are £60 boiler service fee and warranty is 10 years. With the solar , heat pump and battery systems lies a future maintenance and replacement cost that is unknown so unless you put away a sink fund , then a nasty suprise is not far away. I'm not saying its not the future but retrofitting is not really cost effective for a large portion of the UK's housing stock. I have enjoyed the videos though

What was the Kw array of panels you had on the roof please?

Impressive figures. In these calculations, should you not have also factored in the return you would have received on £17,500 if you had invested the money or put it in a high interest savings account?

Heatable quoted me £14k for 14 REA panels and a 10.1kw battery. Not sure if that’s good value or not

Funny how we get different deals. I paid £18,500 for 5kwp solar, optimisers, solar edge inverter and Powerwall and gateway last year. But just paid £1560 for heat pump, new tank and 14 new radiators. The only thing I think you have missed is the loss of interest on the money. You would probably would have got circa £1000 a year interest on your “investment”. I bought mine for “geekary” reasons but enjoy the savings. 😂

For the heat pump, do you know anything about heat pump convectors and using a water system for cooling?

Bit baffled re: the heat pump cost. Ive just been quoted 16.5k, so with the grant (which is higher now) it'll be costing me 9k. This is with heat geek, and includes a few radiators. I've ripped out my gas boiler during a renovation already so pretty much already committed to it but i was pretty shocked at the cost. I was expecting 4-6k.

Makes perfect sense 😊

What about the changes to plumbing for the larger radiators? plus the radiators themselves and the associated controls? They seem to have been missed?

I’ve installed all that you’ve installed with the exception of the heatpump which was installed by Octopus Energy. Like you I’m not that interested in pay back as like you I feel it’s a nonsense. However I had the money to do all and whilst in the bank it was earning very little. Now I estimate it’s giving me a return of more than 6% that’s taking into account the FIT payment I get which is the lowest amount before it ended. Does my heatpump heat my house? Absolutely, what’s more my wife on blood thinners needs heat so our house is always at 21-22.5°c.

Don’t think I’m gonna go for the heat pump as we don’t have room for a water tank we are looking at the bolt electric boiler

Hi EVM, what size is your array please?

Your house is beautifully finished, who built it?

Really interested to know how this has influenced your EPC. I don't believe that anyone has covered this aspect online but I stand to be corrected

Cheers Andy

Trying to drcide if a home battery first would make sense rather than solar and battery together! Only suitable roof for solar is NE facing, hence ny reticence to get the solar. I could squeeze a few panels on the front of the house, but would it be worth it? Thoughts anyone?

How much extra insulation have you added ?

I’ll start by saying I don’t have an axe to grind either way, I’m genuinely interested in potential overall savings of PV, Battery storage and ASHP, hell maybe even an EV at some point. I appreciate that either side of the argument, people tend to paint as good as a picture as possible to justify their choice. I do find it odd that the payback period question is looked at as a negative in terms of greener energy solutions. I admit that i couldn’t careless about the environmental question, i neither believe that human activity has, as big an influence as the cultist claim and certainly my and uk overall contribution is negligible in global terms. I would consider the payback based on savings if replacing my gas boiler, in terms of gas savings due improved efficiency as opposed to the additional cost of the boiler. Asking why the payback question isn’t applied to say a new kitchen purchase is idiotic, people purchase all manner of items just for the joy and use of said item. But as most of us aren’t trying to save the planet, the cost of heating, electricity supply etc is fundamentally one of how can i do this for least annual cost and ideally building in better surety on prices going forward. Obviously i could save the most amount of money by choosing to rip out my gas boiler and not installing anything to replace it or use any electricity and sitting in the dark and cold, albeit that this isn’t really realistic. Likewise if i never travel anywhere, i would save a few thousand pounds a year on car running costs, but again thats unrealistic. The main reason to watch these types of vlogs is to see what your experience and more importantly what your costs are, so payback is a relevant question. Obviously there are many factors that can and will change in the future, smart meters for example are equally useful for increasing peak rate charges as they are for reduced rates in low demand periods, obviously a solar/ battery will negate or mitigate these risks. Clearly EV costs will rise as more people convert and government has to maintain its tax take on vehicle users, obviously this will effect ICE vehicles as well, as the government appears hell bent with pursuing the net zero lunacy. They will inevitably increase costs for all forms of fossil fuels to discourage continued use, or more importantly make green energy production from wind and solar farms look more viable economically. Obviously this could be argued as another positive for local production by individual homeowners. It would be interesting to watch these type of vlogs and read the comments without both sides having to make irrelevant or spurious comments to justify their decisions. My criticism is not aimed so much at the vlogger, more so for some of the claims made in the comments, but hey ho.

If the batteries are relying on being charged with a TOU tariff, what happens if those tariffs disappear or aren’t so generous?

If you assume an interest rate of 5%, the payback becomes much longer.

What you said about carbon monoxide is so true. 😆

I am looking a battery system but not sure how long i am staying at my home in which case payback matters.

Hi, regarding your comment, I've spoken to several people who have got a great pump for the price of the grant and no extra .... Please share details, this is a game changer!!!

Sounded like some pretty band coil whine I'm the battery room

Yesterday I installed 13 Solar panels on a south-facing roof and a Solis Inverter and a Duracell battery for £7800 ( I don't know whether that is a good price or not) but so far on a cloudy rainy day in Northern Ireland the Battery charged up to 99% and it appears we have spent nothing on electricity we have already earned £3.70 from the grid. About two years ago we changed our heating system from Oil heating to Natural Gas and our last quarterly bill for Gas was £800 and the previous bill was £1200 (I have never ever had bills like that not even with oil) so I needed to do something, which is why we have taken your advise and moved to solar panels and be less reliant on Gas. In Northern Ireland, we get no grants....so no incentive to move to solar. Would you advise us to move our tariff to Economy 7 (Off-peak tariff) or should I wait until winter and then change over and use the off-peak tariff to charge the battery?

WHITE BOARD OF TRUTH RETURNS!

Payback is a relevant metric as typically the technology used to replace say the gas boiler with something else is more expensive than just replacing for like, or adding solar PV where there had not been any before. I for sure want to know if what I am doing makes both economic and ecological sense.

Environmental and money .

whats the expected life span of all those items? - yes in 10 years I may need to replace my gas boiler but will you need to replace those 3 items?

It always amuses me when people try to dismiss the 'payback period' question.... y'know... comparing it to buying a new sofa and looking for the payback period... .....it's financial naivety...!! Thirteen years ago, I didn't have solar PV - then I had it installed and paid £8500 for the privilege! Soo....at that point I was DOWN £8500! The SOLE purpose of having the system was to MAKE MONEY from the Feed in Tariff..and, real time use of power..... ...so, OF COURSE I want to know the pay back period!!! Otherwise, until the system has EARNED £8500 it has no purpose.....it's costing me money!! Once I break even, it starts to generate income... which pays my energy bills... ....it's not rocket science.... !!! (If I feel all 'tree hugging' and 'planet saving' while making money ...then, that's a bonus ...!!)

So the heat pump price was just the difference between the gas boiler and the heat pump. So if I don't need a new gas boiler it's going to be more expense that I don't need.

It's a no brainer

How many years before batteries need replacing?

Have you noticed that the greener we get the colder it is. It' June for god's sake and we are cold. I have to have the coal fire on to keep warm and hopefully help heat up the planet. Back in the 70s it was blazing hot in June. In the 90s I had to buy an air conditioner to cool the house down. Its never been on since 2005. Are we being lied to, I suspect we are.

3:20 - That a 924 in the garage?

Something doesn't seem right here, he said his ashp for a full year was over £282 a few months ago. The figures don't add up, My standing charge alone is £240 a year. He has 19kw "usable" battery storage and thats absolutely huge compared to most people. His sola array must be at least 8kw to get his bills to that amount for a whole year even in winter and charging up the batteries at night. I have a 4kw "south facing" in the southwest of England and 10kw storage batteries in a 3 bed house "no ASHP yet" and it costs me around £600-£750 a year including the standing charge of £240 a year not including my EV. Its just me an the wife "no kids" and we both work so out all day. So how is his so low ??? I am classed as a low to medium energy use user so i just don't get how his bills are so low. Are his bills including the standing charge or not ? If they are its extremely impressive and i would love to know in a very detailed way how. Edit: he also doesn't include his EV charging costs as i guess he uses overnight electric for that like i do for my ev. I don't want to come across as skeptical but to me it just doesn't add up to what i understand of the costs of running a system like this. Just importing energy last year cost me £160 a year at night to fill my batteries. So just my standing charge and overnight top up cost £400 not including any actual used KWs from the grid. £500 a year electric bill is a major stretch for most homeowners with anything under a 20kw battery and a large solar array. Its not realistic as most people only have 10kw and under.

Adding ASHP, solar and battery does not qualify a house as an “eco house” maybe carbon reduced at best. Sorry but you would need to passiv or Enerphit to claim eco house

That money invested in tax free isa stocks would have made 300% more than you have saved compounding for 30 years. This is insanely bad investment if you take in to account the lost opportunity costs

Why is your heat pump not in the loft, under the huge solar connector of you slates/tiles?

Nice to see the middle classes saving money. This net zero nonsense doesn't benefit the majority. You need a massive outlay to save money in the long run . No solar panels on Amy council houses or housing associations around my area. As for EVS no use for home charging unless you have a drive way. Again not tje majority.

I don’t need to and I don’t read the mirror I also live in the real world

By all means make your house cheap to heat etc. If, on the other hand, you think you're saving the planet- you must have a screw loose.