Very kind and generous of you to share your data. Absolutely fascinating. Thanks so much!
@TimAndKatsGreenWalk3 күн бұрын
No problem, it's my pleasure.
@ionlywanttrainsКүн бұрын
Impressive! I really like your breakdown per device, nice and clear to see how much device uses. This prompted me to optimise my own hot water heating.
@TimAndKatsGreenWalkКүн бұрын
Thank you, I'm glad you like the charts, I spend a lot of time refining them to try and make them as clear as possible. Good luck with your hot water optimisations!
@HaiderAlDelfi3 күн бұрын
Thank you for sharing. I went for 44 panels setup and no battery, hoping to achieve net zero that way with seasonal offsetting.
@TimAndKatsGreenWalk3 күн бұрын
Wow, that's a nice array! I wish I had room for that many. I hope your strategy works out for you but there's always the option to add batteries later if you find you need them, so no harm in trying without first.
@willeisinga20893 күн бұрын
Thank You for this information.❤ I have no Gas since 2012. Rooftop Solar Inductioncooking Heatpump. I have installed a New LG Therma V Monoblock 9 KW. Price 3575. Subsidie 3075. Yesterday 23 kWh and every day 23 kWh. That is super in januari. Total 700 kWh a month. November December Januari Februari Electricity from the grid. In March till October I have Rooftop Solar. In November 2025 I get the results. Super.❤❤❤🎉👍🌹🌹🌹
@TimAndKatsGreenWalk3 күн бұрын
Good stuff. I'm so glad that we no longer have gas.
@willeisinga20893 күн бұрын
@TimAndKatsGreenWalk Yes and its Easy and makes Money. Thank You for the videos and information.❤️🌹👍
@geoffreycoan3 күн бұрын
My 2024 generation was only 50kWh down on 2023, surprisingly, very similar. ASHP consumption down about 33% now I am fully using weather compensation. I was on Octopus Agile with 15p fixed export for all of 2024. Total bill (excluding standing charge and £80 DFS saving) was annoyingly £10 - I hoped it would be zero! Still, a great result. I am saving £3000 a year over what it would be costing me on the SVR giving a solar/battery payback of about 6 years
@TimAndKatsGreenWalk3 күн бұрын
Ooh, so close! That's a great achievement nonetheless.
@Jaw0lf3 күн бұрын
Great stats Tim. My 7.56kWh Solar PV E/W split produced 5.18MWh down from last year. 2024 Year - Total Consumed for Home, ASHP and EV was 15.8 MWh. Tesla Powerwall enabled us to get an approx 80% night rate use, that really helped to reduce our bills. Grid import was 13.3MWh and export 2.39MWh. Tesla EV used 3090.7kWh for 10,103 miles and ASHP 2583.3kWh.
@TimAndKatsGreenWalk3 күн бұрын
I love how the combination of these various technologies work together to enhance the potential savings you can make. Getting a battery with our solar was a revelation, really, especially when I came to supporting the heating.
@Jaw0lf3 күн бұрын
@ I am at home most of the time and love my tech so higher user of electricity. We have a large 4 bed detached 1972 home. We had the old insulation removed and new insulation installed. I also part own a wind farm with Ripple Energy so payment for all my use is less then £90. The investment into our home has been well worth doing.
@TimAndKatsGreenWalk3 күн бұрын
Absolutely, I consider all of our home improvements to be highly worthwhile. There's still a lot more I'd like to do in due course though.
@grahambrown423 күн бұрын
I live in a 1970’s 4 bed detached, it has cavity wall insulation, it has old loft insulation and probably half the thickness of what is installed these days. I have an EV 6k miles mostly charged at home, it does around 3 miles per KWh, so has used around 2k KWh of the 8.7k KWh total Electric used. Gas for heating Electric shower Use Octopus GO for Elec Tracker for Gas 2024 I used: Gas 8.7k Kwh Elec 15.2k KWh Paying £200 per month for Energy!
@bloodynorahvan22033 күн бұрын
Looks like the Mixergy install has been the real star of the show. For December the increase in efficiency factor was 158/65.42 = 2.41.
@TimAndKatsGreenWalk3 күн бұрын
It's been a big success so far, for sure. It's hard to get an exact efficiency measure though as the hot water use in Dec 2023 isn't exactly equivalent to Dec 2024. Christmas 2023 we were at Kat's parents' place whereas this Christmas we had all of her family round, so we would have used more hot water this recent Dec, for example. But it is at least 2.41, as you say.
@lyracianКүн бұрын
I still have gas heating meaning £625 cost for the year in our 3 bedroom house. We had a couple of fault in the solar system this year resulting in the total annual cost of £50 for electricity. I am hoping to break even again on the electricity this year. Eventually I will get the heat pumps installed.
@TimAndKatsGreenWalkКүн бұрын
I'm sorry to hear you had faults with your solar, I hope it's all working properly now. I'm rooting for you to break even in 2025.
@Ryanhothersall3 күн бұрын
December is the first month of summer here in Adelaide, South Australia. Generated 672 kwh off the 6.3 kw north facing house system which has had an export limit put on it since July 2024. Generated 1.23 mwh off the east/west facing 6.5 kw shed system. Total generation for December is 1.90 mwh. For all of 2024 the house generated 7.76 mwh and the shed 9.62 mwh combined 17.39 mwh.
@TimAndKatsGreenWalk3 күн бұрын
It's a shame you've got an export limit on your North array. Why has that not also been applied to your other arrays?
@Ryanhothersall3 күн бұрын
@@TimAndKatsGreenWalk An update to the inverter came through at that time which imposed the limit on the north array, but not the east/west. I am waiting for the installer to set up a device called a Voltello that will enable flexible exports, where my system can export 10kw, but if the grid can't handle it, export will be limited until it can.
@notterry1315Күн бұрын
Thanks for sharing your figures. We're just about to specify a solar and battery system and will also be using an A2A HP as well as a hot water heat pump (maybe an Edel rather than a Mixergy for us). So, all in all, our set up will be fairly similar to yours which makes your trailblazing super useful for us. We will have a very well-insulated house with a projected heat load of only 2kW (partly because our place is only around 75m2). I'm wondering about running the HWHP on internal air, essentially piggy backing on running the A2A heat pump longer / harder overnight on cheap electric in the heating system (and getting useful cooling in the summer). It would avoid the heat losses involved in ducting to the outside. I just wondered if this is something you consider and decided against? I'd be interested to know if you have time to reply. Thanks again.
@TimAndKatsGreenWalkКүн бұрын
Personally I'd be cautious about doing that. You really don't lose much heat via the ducting and you certainly don't want cold air from your hot water cylinder getting blasted into your home (even in summer). It really does come out at quite a rate, you'll definitely want to direct that outside. There is an argument for using indoor air as the input, but again it consumes a heck of a lot of air, so you'll find the house has to pull a lot of replacement air from outside through various cracks and such in your house, so you'll probably have a lot of drafts in the winter. You won't gain anything in terms of efficiency as you don't get something for nothing in this situation, so it's up to you but personally I would prefer to keep the heat pump cylinder ducted to the outside for both input and output. If you can install in a garage you might find you get away without ducting, but the garage does need to be pretty big for that to be viable (you don't want the cylinder self consuming the cold air that it pumps out so you need good ventilation or a large volume of air). Good luck with all your upgrades!
@andrewwright12003 күн бұрын
We only got solar and battery in the last few days of April. 6kWp and 9.5kWh battery, 7 month figures is 4510kWh generated, 3040kWh home use. really happy as we were on IOF all summer and it will cover all our winter use and standing charge until end of April 2025, so zero cost for the year. We are now on COSY and have bought ~ 5kWh in 3 months at the non low rate. Solar battery story Install Date Today 24/04/2024 08/01/2025 Days 259 Home use 3152.9 Generation 4597.6 Grid in 3251.5 Grid out 4257.6 Battery in 2177.3 Battery out 2052
@TimAndKatsGreenWalk3 күн бұрын
Nicely done. That's great going.
@MrEV3 күн бұрын
So, you've spent in one year what we're currently spending in about ten days. Well done! I'm just going to have a little cry in the corner...
@TimAndKatsGreenWalk3 күн бұрын
Crikey, that's brutal. I'm sure by this time next year you'll have improved your situation considerably, and I very much look forward to seeing how you get on.
@robinbennett59943 күн бұрын
I was about to comment that our December bill was within a couple of pounds of Tim's entire year - but now I don't feel quite so bad...
@LaverLamont3 күн бұрын
Top tip for cutting energy bills - don’t heat really old, leaky conservatories 😅 Sorry...
@MrEV3 күн бұрын
@@LaverLamont 100%! I'll frame that comment and show my wife. Hoping she won't shoot the messenger.
@airbornevet1113 күн бұрын
They 'forward paid' for their energy bills by investing tens of thousands in solar and batteries. Without the huge initial outlay which is not affordable by most people, their energy bills will be just like everyone else.
@southwestsellers54753 күн бұрын
7.38kWp solar array ASHP and 20kWhs of batteries. Stats for 2024 produced 6.04 MWh consumed 5.01 MWh. Octopus App shows 3757.3 kWhs exported =£686.81 2791.82 kWhs imported = £310.25 leaving a credit of £376.56 (not including standing charges). So used 5.01 MWhs for free and £376.56 credit for the year.
@TimAndKatsGreenWalk3 күн бұрын
Very nice. Must feel great to be in the position of having a negative bill for the year. That is where I'd like to be eventually.
@freeforester17173 күн бұрын
Having a large Lithium battery within the home may have implications for your insurance cover, especially in the event of a fire. This being said, if your setup can be powered by an independent portable generator then even in the event of a power cut you should be secure.
@TimAndKatsGreenWalk3 күн бұрын
The batteries power the house in the event of a power cut ( kzbin.info/www/bejne/fnWYfKR5bLKZrJo ). And these batteries are LFP chemistry so are very unlikely to catch fire, unlike the NMC chemistry batteries you tend to get in laptops and phones, for example.
@robertredpath48173 күн бұрын
I'm not sure about other brands but solis inverters actually have a generator input as standard for this exact reason
@steve_7873 күн бұрын
@@robertredpath4817 I have a Sunsynk and that has an input for a generator (seems to be more for the South African market as the grid isn't as stable). The Sunsynk can do partial home back up. I didn't opt to do it as you need to do some more rewiring of which circuits you want to back up, but there is a guy on YT who did have it all done and seems to work well. Maybe if we ever start having grid issues I'd consider it but for now a power cut is usually just a momentary blip where I am.
@grahambrown423 күн бұрын
You have a lithium battery in your pocket (phone), do you wear a fireproof suit?
@jonesneil3 күн бұрын
Great to learn about you success here Tim. Where you collate all of your metrics from? Multiple sources I assume? And how do you calculate your estimated savings?
@TimAndKatsGreenWalk3 күн бұрын
Most of the data either comes from Octopus (you can download your half hourly consumption and export values) or from the various kit we've got installed (like the Mixergy or the GivEnergy system). I compile it all together in my various spreadsheets then use some assumptions to estimate the savings, such as converting our heating and hot water demand into an equivalent amount of gas used, or assuming the MPG of our previous petrol car to convert Kat's EV mileage into an equivalent petrol cost, that sort of thing. Actually, that's given me an idea for a future video, showing how I do all that stuff. It's been a while since I did one of those.
@jonesneil3 күн бұрын
@@TimAndKatsGreenWalk Appreciated Tim, thank you. I look forward to the video!
@barticasun3 күн бұрын
Fantastic results. If you don’t mind me asking what are the average temperatures in the living spaces during daytime hours in winter? Thanks
@TimAndKatsGreenWalk3 күн бұрын
Depending on the room, between 19 and 22 Deg during the day (I work from home so that's pretty consistent). The ones we spend most time in are the warmer ones, like the office and lounge.
@barticasun3 күн бұрын
@ thanks for coming back to me. That’s nice and toasty. The aircon route definitely appears the way forward and an extra bonus for summer heat plus a no brainer in you have solar.
@TimAndKatsGreenWalk3 күн бұрын
@@barticasun there are definitely pros and cons to both A2A and A2W but A2A works very well for us.
@peterfinkill80983 күн бұрын
I switched to Tomato Energy for much better low price tariffs throughout a 24hr day 0am-6am @ 5.004p/kWh 6-9.30am @ 24.3p/kWh 9.30-11.30 @ 14p/kWh 11.30-10pm@24.3p/kWh 10-12pm @ 14p/kWh Might give you better savings than Octopus, unless I'm missing something?
@TimAndKatsGreenWalk3 күн бұрын
You may be right but for now I'd rather stick with Octopus. I don't think the saving would be enough to offset the hassle of switching, among other reasons.
@geoffreycoan3 күн бұрын
Do a search for Tomato Energy Elexon Elexon do the wholesale electricity settlement and they’ve formally published that Tomato is in breech for errror rate Hope they can turn it round, because doesn’t look good and maybe they won’t survive
@wag-onКүн бұрын
With the EV using 1013kWh how many real world miles did that give you? Nice video and great savings.
@TimAndKatsGreenWalkКүн бұрын
We get about 4 miles/kWh, so that's roughly 4k miles. It varies a bit depending on the temperature etc. but that's a reasonably accurate rule of thumb for us.
@rugbygirlsdadg3 күн бұрын
£200 for the year. 24 x 410kW panels split East/West with 2 x 5kW inverters. 11.6kWh battery with 5kW inverter. Eddi for hot water, Zappi for the car, gas central heating, gas hob. Roughly 5000 miles on the car. Net bill for the year £200. Slowly making tweaks. Hopefully down to zero for 2025.
@TimAndKatsGreenWalk3 күн бұрын
Great result. Good luck for 2025!
@sailaway82443 күн бұрын
What's the total cost of all the tech you've installed Car, solar system, batteries, heat pump, dehumidifiers, hot water tank etc and the annual maintenance costs of them?
@TimAndKatsGreenWalk3 күн бұрын
I've covered all the details in other videos (take a look at the description for links). But all in the equipment came to about £27k (ignoring the car because it's a lease, and ignoring the dehumidifiers because those aren't relevant to the savings, I only include those in the consumption figures because I measure them they don't save anything). Maintenance is zero for the solar and batteries, about the same for the heat pump as for a boiler and significantly lower for the EV compared to an ICE car.
@bloodynorahvan22033 күн бұрын
Do you agree that the current tarrifs don't encourage the consumer to be as green as possible?
@TimAndKatsGreenWalk3 күн бұрын
Yes and no. Any tariff that encourages load shifting to overnight will naturally help reduce your carbon intensity, so that's good. But exporting at high carbon times can be just as helpful, which is not currently encouraged by most tariffs. Flux goes some way towards this with the high export rates between 4 and 7pm, but actually the carbon intensity peaks a little later than this, on average, so if your goal was to be as green as possible you'd be better off exporting a bit later (I have a video about this coming up soon, in fact, so keep you eyes open for that one).
@robertredpath48173 күн бұрын
3.5kw ashp 4.8kw solar panels and 20kw battery with eon next drive ( 6.7p kw over 12- 7AM and export of 16p) with export I'm looking at £1300 a year savings vs oil and std electric bill. Only the house is always 20°C. I need to get an EV and more solar :-)
@TimAndKatsGreenWalk3 күн бұрын
We're so much more comfortable this winter with our new heating strategy. Kat is delighted. It's funny, so many people who get solar end up wanting more, I'm just the same.
@robertredpath48173 күн бұрын
@TimAndKatsGreenWalk I worked out my per panel contribution for 2023 and 2024 and 1 years contribution is more than the same panel costs to buy and be delivered....a one year payback is a TOTAL no-brainer. It's also very hard to argue with your own data 😆
@robbiegerard78573 күн бұрын
How much did the current system cost to install?
@TimAndKatsGreenWalk3 күн бұрын
Take a look in the description, I cover all the details in the videos linked there. But all in everything came to about £27k. That includes the solar, batteries, A2A system, and Mixergy iHP.
@alanwatkins14943 күн бұрын
So, how many years will it take before your systems pay for themselves?
@TimAndKatsGreenWalk3 күн бұрын
In the region of about 10-14 years. Maybe quicker, depending on how you measure it. Although there are other reasons for getting all this stuff beyond the payback.
@analogueavenue3 күн бұрын
5.28MWh generated last year (similar latitude to you but in Ireland). 370KWh less than the previous year. Ten months were below par. €675 of PV savings. €535 FIT income. €450 government handout to all homes - not means tested. Total NET bill for the year € -583. Excluding handout € -133. Heating was a mixture of cheap resistive electric heaters and wood stove heat supplied with coppice from the garden and windfall from the roads. We are to get dynamic pricing in September so I'm hoping we can make more FIT and lower costs further with cheaper dynamic pricing. As is, the PV payback will be 4 years from now. Less, if the dynamic pricing is profitable.
@TimAndKatsGreenWalk3 күн бұрын
Interesting. I hope the dynamic pricing works out for you. Is that similar to the smart tariffs we've got in the UK, or something totally different?
@analogueavenue3 күн бұрын
@@TimAndKatsGreenWalk A smart tariff in Ireland is just day, night and peak rate (some have an additional EV charging period too) but all rates are fixed for a year. The new dynamic rates will be based on the wholesale price offered by the power generators to the power sellers. The consumer dynamic price will have two components throughout the day; base rate and dynamic rate. We will have no say over the first rate (though it will be fixed for the year) but with judicious timing we can charge batteries and consume power at times when the wholesale price is lowest. Supposedly, the dynamic rate is set 24 hours ahead by the forward markets. Those prices will be communicated to us so that we can determine our strategy for the coming 24 hours. The wholesale price can vary from ~€100 to ~$400 per MWh so there will be the chance to charge batteries at the one price and sell back at the other on a daily basis. A car with V2X (home/grid/load) would be ideal when not being driven. I can imagine getting a second hand EV with V2X and paying it off with dynamic charging.
@TimAndKatsGreenWalk3 күн бұрын
@@analogueavenue ah, so that sounds quite similar to the Octopus Agile tariff here, where the half hour price is determined 24hrs in advance. Very interesting.
@willeisinga20893 күн бұрын
Please calculate in kWh. Not megawatthours😢 always kWh s👍
@TimAndKatsGreenWalk3 күн бұрын
1 MWh = 1000 kWh, it's not hard to do the conversion. The numbers are all shown in kWh in any case, if you prefer to read the values from the video.
@willeisinga20893 күн бұрын
@TimAndKatsGreenWalk People do not know. kWh is on the bill. They know kWh. And the Price, and Tax per kWh For example. In our Village in Groningen Nederland we have a Solar Park of 35 MW. Google Solar Park Molenwaard Hoogezand. 35 hectare Solar. One hectare is a MW. What is the production??? Of 35 MW Solarpark. People dont know. They think 35.000 kW. But 35 MW produces 35 Million kWh every year. People dont know that. One MW is One Million kWh every year. A kWh cost 30 cent. A hectare Solar produces 300.000 euro every year. 35 hectare makes 10 Million euro a year. 👍🌹❤️🎉🌞🎊
@TimAndKatsGreenWalk3 күн бұрын
@willeisinga2089 I show kWh in all the charts though. Nowhere do I show MWh. The handful of times I mentioned MWh I was also highlighting the kWh values on the screen. I hope that would be pretty clear to anyone watching.
@willeisinga20893 күн бұрын
@TimAndKatsGreenWalk Yes Ok. kWh. Thank You. There is a lot misunderstanding. 👍🙂🌹
@sempereadem54eadem643 күн бұрын
How sad
@TimAndKatsGreenWalk3 күн бұрын
You what? There was me thinking it was quite an upbeat video.