Thank-you Nigel, certainly an influencer for everyones benefit, never looked back since got the same system as you. I've just installed a "accident damaged ASHP - Daikin 6Kw" in a 1917 cottage (EPC G) - tapped into the exisiting oil central heating system (I've got a mixergy, but awaiting someone to install it) = Wow = as of yesterday (everything is less than £5 / day for winter months), so gone from £5k+/year (House + ICE Car) to less than £1k/year (House + EV + Pylontech batteries on a VE system) 👍👍👍

At what rate how many KW do you charge your batteries at cheap rate

I just use the emersion heater. Uses 3.5kw to heat up at night time only. So a cost of just under £100 a year.

Another question for you; which company installed your Toshiba air to air system? Are you still happy with it?

I would love if Mixergy could make my tank do sterilisations from my solar PV diverter (aka Eddi) when there is more than enough solar generation to do it that way. Seems crazy that it has to import from the grid to sterilise when often my 100ltr Mixergy tank is fully heated (including the “cold” sector) to 80C by solar alone most days from end of March through to September when it’s rare up here in west Central Scotland to get enough solar generation in the day to heat the tank.

Get vertical pannels, it’s just got to be done

Thanks Nige, I subscribe to you as a genuine authority on Solar and because of you know what to expect and the effort required to get the best from a Solar / modern home energy solutions. No other creators offer the level of insight and depth into a complex integration of many different systems and how you tweak each one to get the best from them and how to work best as a system overall.

A question if I may. I am considering replacing my current gas boiler with the MixEnergy tank, currently the gas boiler heats water for both hot water and heating, do you use your MixEnergy tank for both hot water and heating?

And on the 12th day there was sun (November 2024)

Hi Nigel, good video, I have a 2/12 year old system, 5.44 kw array (solis 5kw inverter) with 16 panels, 4 pylontech us3000 batteries , I would like to add at least 2 us3000s or us5000s to my system as we have recently added Toshiba A2A system like yours, Having watching yours and other videos it appears to be fairly straight forward to do it yourself, I did ask my original installer who were not very helpful as they have moved away from using pylontech. Do you have any recommendations for the best place to buy pylontech batteries to be self installed ? Regards

I was looking at the complexity of what you were doing with Home Assistance and thinking this what Kraken from Octopus was designed to do. Now I am Octopus would say: give us all your private & pubic data and feed it into our black box and it will spit out a series of numbers that you will have to trust us is right for you. But the reality is you would tatter play with sa local instance of Kraken. And Octopus need to supply either a SAAS version of Kraken or a hardware black box that the end (L)user can lock out net access and data transfer into the cloud.

Can you buy Pylontech or any other brand of Batteries second hand and then mix and match them. Whilst I will have bidirectional EV charging. Just as with compute spreading ever cheaper compute into its networks and speading up in the process (pun intended) so having more batteries should make load managment across the batteries.

How are you heating/cooling your home? Are you using a heat pump? Are you using Task Heating? Just as in the late 80's onwards when we had task specific lighting, with hear panels we have the possibility of using targeted emissiive heating along with the heat pump providing the base load warming of the room, which works to advantages of heat pumps.

Does your T-shirt mean that you are involved in op/sec which could explain how you can afford to buy the hardware. I am buying a second hand Ionic 5 75 or Enqak with Heggar KNX protocol compatible with Home Assistant consumer unit. Precisly because I can the arbitrage the electricity prices and hopefuly to intially extrend it with a second hand mixergy tank and hopefully go on to fit second hand commercial solar panels and eventually extending it with an automatic turnable off ground array of solar panels as can be see on the VanWives channel.

I was watching a Mixergy KZbin video quoting you speaking about your use of a Mixergy tank. You mentioned that you were running your channel to help people how to implement all these areas and whilst I understand the issues technically I don't understand it practically. For example I am living in a 1970's townhouse needing a replacement of its roof, upgrades to its electrical system to support an Bidirectional supply for an EV either a Ionic 5 or Enyaq 80 via a Hegger KNX Protocol compatible bidirectional consumer unit as its compatible with Home Assistant I just hope I can find someone who knows how to fit & service a mixergy tank near Oxford where I live.

There isn't really an alternative to Mixergy, it's quite unique. Really clever.

hi thx for the video some thoughts : first of all, i had many humidity problems in my flat, didn't see it first, paint was fresh new etc noticed some mould etc... bought an industrial one very big and noisy but it only fixed the bathroom (my flat area is 28m2)... so i bought 2 other ones... what should be noticed about dessicant it's not comparable directly because you have drawbacks too : buy some new dessicant and some are not so good for health (the by products)... also one very important point (i didn't see it in the manual or on the unit itself in the one i received recently)... you MUST wait 24h before using it once you have put it where you want it to be... some commentors said it doesn't work out of the box etc etc yes it's like a fridge... probably they ruined it by doing this

This video begins with the blindingly obvious.

Very helpful video Nigel, thanks. I've been looking into the Mixergy tank as my next move towards full energy electrification (solar and batteries already done). So to hear your endorsement is very encouraging.

We have a heat pump and a "normal" modern water tank installed at the same time as the Heat pump, this only gets heated overnight to 50 degrees during our cheap Intelligent Go time so our water is perfect for morning showers, this takes about 40 minutes with a short peak at 3kW draw that settles to 1.5kW for the rest, it never gets heated during the day and all our solar is exported, if the water is a bit tepid in the evening, who cares, that is what the dish washer is for!

Just to throw a curve ball in here, I have an electric combi-boiler. Plumber and sparky advised against it (only works if you're in a one bedroom flat, etc, etc) Anyway, 18 months in and it works just fine in a typical (UK) three bed semi. I considered the Mixergy route but the cost and hassle put me off. I was, however, prepared to swallow my pride and get one installed if the combi didn't suffice but so far, so good.

have a McDonald 200 slimline tank. This was heated using solar using Eddi until octopus started paying for export @ £0.15 so stopped the Eddi! Now have ashp which heats the water (full tank) at 03:00 AM to 47C (adequate for thermostat showers!) The tankful costs 2kW ASHP electricity @£0.07 2 showers /dishwasher/handwash still have hot water available. The cold is added to bottom of tank and does not seem to mix with hot at top. Legionella is done every 2 weeks and this is controlled by the ASHP switching the immersion heater via the Eddi until the thermal trip on the heater trips. The ASHP still only heats to 47C during this cycle.

I use the Mixergy scheduler to charge the water tank up with cheap grid electricity at night. If I schedule it with the Eddi, it takes the power straight from the battery and prevents the battery from charging.

If I remember correctly mine was two or three hundred pounds more than an ordinary tank. So the payback period may not be that long - if you are replacing the whole tank anyway. I installed a 300 litre tank because I live by the sea and I want to make sure that I don't run out of hot water when friends and family come to stay in the summer. As compared to a normal tank there is no real disadvantage to installing a large tank (if there is space) because if it's just me I can set it to heat just 20% of the tank.

Lincolnshire, toatal 266.1kWh from 7.56kWh Solar PV split over E/W facing roof. Exported only 45.5kWh. ASHP has used about 85kWh for DHW and any heating. Tesla Powerwall no longer keeping enough power with shorter days and less sunlight!

Hi Nigel. We produced 977kWh for the month, with 179kWh of that feeding the EV. Also had a 12 hour grid outage here, so was feeling somewhat smug with the fact that we didn't even know about it until we heard the neighbour's generator roar into life... I installed 4 x Pylontech US5000B during the month, raising our total storage to 50kWh (usable.) Battery statistics for October were: Lowest DoD (prior to adding the US5000Bs) 69% ; Average SOC 92%. We had 30 sunny days and one cloudy day. If I could export to the grid, or use all of the energy our system is potentially capable of, the extrapolated output would have been in the region of 3.1MWh - which includes the almost 1MWh we consumed. We are starting to use the air conditioners a bit now. The 3.5kW unit in the power equipment room runs 24/7 and we had our newly installed 7kW unit running during the daytime on 5 or 6 days of October. Our second 7kW unit was also fired up on one day and the remaining 3.5kW unit wasn't required (yet.) Happily, the combined load of the three units that were running, once they had stabilised the temperature at 25C, was less than 1kWh. Good luck with November, Nigel. I fear that it's all downhill for the next wee while, for you. Cheers, Russ.

What are the max power ratings of your devices eg kettle, tumble dryer, oven, dishwasher? Have you seen any low power devices for sale?

I have an ASHP and have set this to heat during the off peak hours. As you said exporting as much as you can makes far more sense getting 15p per kWh rather than spensing just 7p during off peak.

Whatever I do in my house, the first question from other people seems to be “when will that pay for itself?”. To me it is like anything, you get it because it is what you want or need at the time. Just because it is a “green” option, why is there this perception that everything needs to pay for itself or have an ROI?

How long do you think the export tariffs will continue if you follow the duck curve some say another couple of years so make hay while the sun shines

We’ve had ours nearly 2yrs and I don’t know if have bothered with one in hindsight. We had it put in with our ASHP, all plumbed in with a pair of 2 port valves (divert valve didn’t work out properly 🤷‍♂️) It apparently gets a better COP using the plate heat exchanger vs a regular tank but has to be heated all in one go. I’ve got ours set to heat on our cheap tariff using the ASHP overnight so a full tank is about 2-3kWh or about 20p. If it gets low because of a big cleaning day, I just boost it to full again; takes about an hour. Getting it comparable with the Ecodan is a bit janky tho. They have an interface box which just operates as a switch, feeds back either a 35c low value to the Mitsubishi system, or 66c high to show the load is fulfilled. Our 1st interface didn’t work apparently, and the 2nd got replaced after about 11months. The installers were sorting a different issue with one of the 2 port valves and noticed the interface was really noisy; a very loud relay. The comms with other systems could be better I think.

I remeber first few videos you did on the mixology and you werent that impressed

A mate is switching to Utilities Warehouse for a 5p overnight rate, which isn't an EV tariff. Great to see. I'm all for EV tariffs but I feel for those who have solar+battery but no EV, they need good tariffs too.

Is there a maintenance,servicing or subscription cost for Mixergy or does it have a great warranty?

Hit an all time best Oct this year. 2% better than 2022 and 15% better than last year. Of course, the neighbor cut down trees last Dec. So this is the first full winter season without the blockage. Just a few kW short of 400 kWh production!! Had to use less than 10 kWh from the grid, which was just below what I used last year even though I consumed 20 kWh more than last year. Luv'n my PV system, even when the nights get long!

I’m still arguing with myself in regards to heat pumps for central heating , the grant from the government doesn’t seem to give the grant for those who would prefer ATA , do I want to get rid of my gas boiler = yes , seems the grant is decriminalising for households who choose to get rid of gas boilers but only if one chooses ATW = surly that’s crazy , people say what about the hot water tank , well at the moment I have a tank with an immersion heater yet I think it better to have a mini electric heater under the sink in kitchen and bathroom so when you turn the hot water tap on you’ve got instant hot water , I put my immersion on to wash dishes or to wash each morning in the bathroom then I’ve wasted the water in the tank to get cold again till the next time I put the immersion on , maybe I’m not looking at this correctly yet it makes more sense to having mini electric heaters for the water with no tank needed , the system I think I need wouldn’t even reach the grant set out by the government , wow either I’m crazy quite possibly or the grant system is , is there a minister for logical thinking maybe that’s on the agenda for a cunning plan to have more households to have heat pumps your choice scenario.

I also have a 2 year old Mixergy tank but I went from a massive 200ltr immersion heater heated hot water tank to a 100ltr Mixergy tank with solar diversion and a heat exchanger. I don’t use the heat exchanger as I have desired not to go down the ASHP route as my bungalow is “all electric”. I have three issues with my Mixergy tank 1) I wish that it could carry out sterilisations when there is excess solar - I normally heat the tank to 51C but even at this time of the year I can get it to almost 80C via my Eddi but it won’t do a sterislation at this temperature whereas fortnightly it will sterilise at 55C by heating the whole tank. Also why does it need stern sati on 2 weekly? When I was working at sea we were required to sterilise water storage and AC systems every 3 months. 2) the insulation doesn’t appear to be a s good on my Mixergy tank as it was on my old tank that would last 2-3 days without needing heating 3) Due to the way that the Mixergy appointed plumbers installed the tank I cannot open the control panel cover to adjust the maximum temperature that the Eddi heats the water to down from scalding hot to a most reasonable (and less wasteful of solar energy I could export!). Unfortunately the plumbers put a copper pipe so close to the control panel that while I can undo the screws I cannot get the cover off! 4) Something to consider before going ahead with replacing a gravity fed tank with a Mixergy mains pressure fed tank is it you have an instant heat or gravity fed mixer shower………… I have to replace my electric pumped shower as it couldn’t take the mains pressure so I had an on cost of replacing the shower too and now I have a huge empty cold water tank in my loft which is a brilliant place to hide valuables when I go away on holiday - a security box disguised as a cold water tank as all the piping to the tank has been removed / disconnected but the tank itself had to stay as it was too big to get down via the loft hatch! Otherwise I’ve been very pleased with my Mixergy tank and have no problem with most days being able to only heat variable volumes of water as I need more or less hot water. I’m single so that’s easier than if there were 3-4 people living in the house but then I would have installed a larger tank. I didn’t pay a penny to heat hot water from mid May through to late September this year too as the solar diversion will start to heat the tank with as little as 200w of solar generated energy - my house has a 200w base load that needs to be overcome before diversion takes place. And even on pretty dull days my 14 year old panels can provide enough energy to at least maintain the tank temperature without using the Mixergy “maintain temperature” function that uses mains electricity. Even at 1030 on this dull Sunday in Central Scotland my panels are generating 300w of energy 200 of them going to the house and 100 to the Eddi/Mixergy tank so it’s at least maintaining the set 51C temperature of the 56% of the tank volume even if it isn’t heating it as well. I have found that with the extra space now available in my airing cupboard from having a much smaller hot water tank if I put newly washed and dried duvet covers, sheets and towels over the top of the Mixergy the added insulation from them helps keep the tank warm for longer too!

I have had mine for over 1 year now. I watched you're previous video on mixergy and took note of buying the mixergy embedded diverter as it has extra settings. I now run a heat pump and its goid at filling 100% of the tank , unfortunately no top down heating. I do wish i had gone for an additional coil in the top of the tank , that would have given me another opportunity to heat water top down. I am like yourself onnlots of FB pages and chats and its amazing how without this tank everyone doesn't know how much water they have i do lol , ots a very useful feature.

We are two years in and the tank is connected to a heat pump. We did consider the solar diverter but decided against as using the battery storage made more sense. We have yet to run thr tank out of hot water with a family of 5 and a 210 litre tank. Sometimes 3 baths in quick succession on an evening. It has definitely saved us money, mind i have been running ours at around 50% and think i can shift to 25% most of the time given it warms up quickly. No issues with the heat pump interface either.

Norfolk is renowned for hard water, how does the system deal with this? Any extra gadgets? Also service, is it annual and cost? I'm trying to decide between mixenegy and sunamp....

This got me thinking that we could reduce down to a 90L tank from the 180L (Mixergy) tank we have now. The biggest problem we have is heat loss, because it’s in a vented loft space. We also have long pipe runs meaning it takes a while to get hot water to the tap. The plan is to change next year and donate our existing tank to a charity, an area Mixergy are also active in.

Hi, you missed a great advantage, it's mains fed hot water, thus effectively giving you a very powerful shower and will fill a bath very quickly.

Very overcast down south again near zero solar, How’s the weather in NorfolkLand ?????

349 kw 2023. Only 314 this year Somerset 7.6 West array Also bought a BMW I3S 120 amp hour and now finally have the 7p rate

This year has not been great in Surrey. September was a disaster. The second half of October was also bad. Feels like the cloudiest year ever to me, but perhaps I’m just noting it more because I have solar. Just glad I have the battery to make up for it to some degree.

October is mid spring here in Adelaide, South Australia. Generated 516 kwh from the north facing 6.3 kw house system. Generated 1.01 mwh from the east/west facing shed system. Combined generation from both systems is 1.53 mwh.

Hi Nigel, I am wondering if you managed to renew your Outgoing tariff, recall you saying a few weeks ago that the 1 year fix was coming to an end, do you have another year fixed for 1 year at 15p? I saw yesterday that the outgoing tariff is no longer a fixed tariff, its a variable tariff. Its still 15p for now but Octopus giving themselves the ability to vary. If you have already fixed then I think that was a good move. My 1 year ends in 2 weeks time and so will be moving to the variable tariff. If Octopus start to reduce the price then will have to consider Eon Drive tariff but dont really want to leave Octopus. Anyway, if its variable then it can also go up....wishful thinking!.

Have you thought about switching on Dynamic ESS?

Just starting out on our renewable journey and hopefully will emulate your electrification success. Lincolnshire system Installed Dec 2023 Panels - 20 x 410W Longi all south facing but severe shading in December & January from next door. Inverter GivEnergy Hybrid 5kW Battery GivEnergy 9.5 kWh Generation so far: Dec 2023 48.1 kWh Jan 2024 100.5 kWh Feb 2024 277.8 kWh Mar 2024 511.4 kWh Apr 2024 754.6 kWh May 2024 907.1 kWh Jun 2024 983.6 kWh Jul 2024 916.4 kWh Aug 2024 859.2 kWh Sep 2024 546.9 kWh Oct 2024 418.9 kWh Tariff = electric Flux - gas tracker Currently Paying Octopus £10 per month and £402 in credit which includes cost of the gas bills so I'm very pleased for the first step into the world of solar. A Heat Pump is our next stage. I'm keen to get more panels on our west roof and toying with the idea of north facing panels. My installer is not as enthusiastic about fitting extra panels as they were with the main system, they keep muttering DNO limit.

Compare time! Rather good stats this month Nigel!! My system 3 arrays, largest 8 kw solis inverter 8x 300w + 11x 400w panels 6.8kw total East facing. 5kw solis inverter 14x 330w panels 4.62kw West facing. 3kw solis inverter 5x 415w + 5x425w 4.2kw North South split. Dual GivEnergy AC3’s with a 8.2 and 9.5kw battery pack. Daikin ASHP. 2 EV's my son has a Corsa E and I have a Volvo XC40 recharge twin. Generation 592kwh. Best day was the 3rd and i hit 40.2. The difference of South vs East West is amazing this time of year. Grid in 847kw. Grid out 605kwh. Total consumption 1.13mwh. Bill Grid in £67.48 Grid out £90.75. Not including standing charge. Credit of £23.27. I am still running an export model. I export at full power for 90 minutes down to 30% which ever limit comes first. Still waiting on an install date for a 3rd ac3 and 9.5kw battery. I am looking forward to the 9kw charge/discharge. I am wondering if my order will be in time for the new 9.5kw gen 3 battery. Looks half the size!