Just found your channel. Your presentation and clarity are exceptional. Thank you, I will spread the word.

Cool, looking forward for your sunamp solution, have interest to test it in the Netherlands 🇳🇱.

I’m really considering one of these with underfloor heating. We will have solar and home battery too.

Interested to hear how your experience with Sunamp goes. Not seen any comparisons between a Mixergy and thermal store (that can also service central heating?)

Just found your channel. Fantastic content. Did you got installed Sunamp? Would be nice to hear about it from you!

Grant, Thank you for sharing your experience with the Mixergy, I'm considering using this in my house in the highlands as its a Oil central heating and water. I have a solar panel array so think it would be good to match that up with the water heater. I currently use an electric shower so aim to replace that so its coming direct from the mixergy. My question is if I heat the boiler to 100% how long does it take to get to cold for a normal shower eg how much heat does it lose per hour. I currently dont have a smart meter as octopus still have to install and getting a smart meter install these days takes forever ! thank you for any insight you can give but its helped me feel better about getting one.

@GrantThomas

2 жыл бұрын

Hi Bob, It heats much quicker using electric, but within 20-30 mins from cold you would have 40% of hot water heated by gas in our 250L cylinder

Vould you do video on heating tank costs with octopus go overnight tariff vs heating with gas

Grant, great demo thanks. How is the Eddi connected to the tank. Currently I have a standard tank and Eddi which just connects via the immersion. Mixergy say I will need a PV Ready switch to connect the Eddi. How is yours connected?

Grant you mention that you were removing the mixergy for sunamp batteries how have you found sun amp ? As I’m thinking of removing our current setup but thinking of worst case senarios winters with zip solar production so would like some understanding on how they have performed especially connected to the heat pump and recharge times when the heat pump was being used

It would be great to hear about the kind of cost savings you get. Although I guess it’s hard to attribute where all the savings come from if you also have solar?

@GrantThomas

2 жыл бұрын

Octopus Go current prices ; off-peak 7.5p / peak 30p ; it takes about 15kwh to heat from empty so £1,231 savings per year without solar.

@DrBenVincent

2 жыл бұрын

@@GrantThomas nice. Do you know how much the total kWh demand went down after getting the Mixergy, even with the same usage patterns?

@GrantThomas

2 жыл бұрын

@@DrBenVincent Not that predictable with family life. But shifting charging our Powerwall and Mixergy each night using cheap electric has reduced our average monthly kWh price to under 10p.

@handle1196

Жыл бұрын

@@GrantThomas if you charge the battery at night from the mains, whats your solar doing during the day?

@handle1196

Жыл бұрын

@@travellingthomases so in summer the solar charges the battery then diverts to heat the cylinder via emersion and in winter the off peak tariff charges the rest of the battery and heats the cylinder? Gas kicks in to heat it when theres no battery left?

I always join the top of every cylinder with a tapping at the bottom to cause destratification and I used to use a pump but have found it actually does it on natural convection currents. I've been doing for 16 years. Should have patented the idea 😢

Grant, really interesting demo. I have pretty new (5yr old) 250 litre tank that is heated exclusively by gas which I estimate is using ~6000kWh/yr just for hot water. I'm looking at solar currently and keen to understand how effective using solar to heat a std tank is and how much more efficient the Mixergy tank will be given it will be £2-3k to change. Any perspective you can provide would be interesting.

@GrantThomas

2 жыл бұрын

Hi Andrew, I am able to have a perfectly hot shower with only 11% of the hot water in the tank due to to the way to heats using the top immersion. It is more efficient that any gas heating solution. Pair it with a Myenergy Eddi for the ultimate solar diverter

@andrewnewton7879

2 жыл бұрын

@@GrantThomas Thanks for the feedback

@andrewnewton7879

2 жыл бұрын

What is your annual KWH for Hw with Mixergy now?

@GrantThomas

2 жыл бұрын

@@andrewnewton7879 about 4.200 kWh excluding solar PV - nearly all of that at 5p per kWh Octopus Go off peak rate - so about £210 for a year

Hi Grant. I am planning to upgrade current open vent to unvented. I only found out about Mixergy a few weeks ago and its looks great. I have 5kWp solar PV and and Eddi. I am curious - does the mixing pump vary its speed so as to heat the water at the top just enough so that it doesn't trip the cylinder stat but keeps shifting the heated water mass down the tank?

@GrantThomas

2 жыл бұрын

I think it varies its speed and purposely heats as it adjusts, and the cold water fans out across the hot water to maintain a hot temp. There is even an option in the settings to maintain a 60 degree temp, even if it it only has 1 or 2% hot water left!

@fionnan2811happy

2 ай бұрын

It will also work on natural convector currents. I've been plumbing them that way for 16 years and works perfectly. Just use the secondary hot return to a tee on the drain off and bingo. 👍👍

Any consideration for bringing these across the pond to the US??

Great video. Who does your install work? So hard to find the right trades who know about this.

@GrantThomas

Жыл бұрын

I just use the same plumber and sparky I have used; Mixergy plumbs in like any other cylinder and the immersions are pretty simple. I'm normally there helping with the install as I have designed all of my installs.

With that size cylinder, how many people in your house to use it? Thank you.

Hi grant are there any advantages of a traditional megaflo over a mixergy tank... I can't find a comparison but it seems as though not... other than the warranty? Mine is being installed tomorrow.

@GrantThomas

Жыл бұрын

Hi Keith, Yes considerable differences; Mixergy is the only cylinder that heats fro the top to the bottom so you can have a shower with only 10% hot water, a megaflow needs the whole cylinder to heat

I'm getting a mixergy tank installed next week... Are the immersion included with the product or considered extras?

@wintersun398

7 ай бұрын

How has it worked out for you?

can mixergy be used to heat radiators?

@dsuse3949

Жыл бұрын

@@danielwake7621 i just bought a house with no heating system. i plan to buy a mixergy tank... buy i also need a buy a boiler to heat the radiators. i will have solar panels and lots of battery backup . i was wondering if i could use the immersion of the tank to also heat the radiators instead of buying a boiler.

As amazing and clever as all these heating systems are - such as the mixergy hot water tank involved here - you need so much capital investment in PV panels, inverters, battery storage and (significantly) SPACE for things such as PV panels and the all the kit. Look how brilliant but also complicated this all is. Essentially a room is given over to this stuff, whereas millions of homes just can't fit it in. As much as I'm a fan, it seems only possible or practical for those with both the means and the space to install it. Thanks for showing us your system - how did the air source heat pump trial go in the end? Do you get the mixergy tank back? I'd love to see a real-world comparison in running cost vs your gas boiler.

@lmechb3305

Жыл бұрын

We’ve just taken the plunge with pv using a home improvement loan. Justification for us was to take back control of variations in energy costs and instantly adds value to your home. As for space, an unvented tank can be fitted anywhere; loft fo example. I’m looking at using a corner of our garage, but appreciate not everyone has a garage.

4:21 That's upside down! You said the water is heated from the top-down. So the top should be red!

I heard the biggest complaint was if you use a solar diverter then the tank becomes dumb and bypasses all the AI.

@travellingthomases

Жыл бұрын

Not at all, with the solar diverter controlling the top mounted dual immersion heater it works as normal, heating from the top with the pump 'pulling' the heat down.

@bazcurtis178

Жыл бұрын

@@travellingthomases That is great to hear. I am confused now. This is where I got the information from - kzread.info/dash/bejne/amGbkrqtgLmbnps.html

Bizarre that the cylinder graphic in the app is counterintuitive by showing the heat at the bottom and cool water at the top....when in fact it is the total opposite. It would send my OCD into overdrive! A good idea buy very expensive cylinder.

If you're able to have a shower with only 11% capacity, why do you have a cylinder this size? (Unless your household is having equivalent to 9 showers in the morning?). A conventional cylinder half the size programmed conventionally and heated fully would be cheaper to run than this setup. Nice video and nice kit, but sizing the cylinder appropriately from the outset is absolutely critical in making large savings (greater than 20% being quoted by mixerg). I'm sure I'm missing something though, i don't know your house/household members and water useage. Cheers

The only advantage i can see is that the cylinder can heat up a small amount of water midday when electricity cost are high, but if you have pv panels you'd just use them to provide electricity to heat cylinder free of charge. Then if you had batteries this could provide year around cheap electricity. So wheres the advantage? Most modern heat pumps/boiler would want a digital signal from cylinder to boiler/heatpump, this can modulate boiler/heatpump maximising efficiency by reducing flow temps and cycling. You just can't do this with mixergy, be great to get some feed back on that.

@GrantThomas

Жыл бұрын

Thanks for your reply Matt. My Mixergy is an EARLY system without the heat pump coil. All new Mixergy cylinders are Heat Pump ready. Mitsubishi would not approve a new Mixergy cylinder as part of the trial we are part of so had to have a second cylinder. However this now gives us significant capacity that we can heat using off peak energy. We also have 2 x Powerball's in the garage providing 27 kWh of storage. Net of this; we import over 60 kWh each night (December 2022) at only 7p per kWh which charges both batteries and both cylinders meaning our daily electricity cost is between £4-£10 depending on any mid-winter sunshine. In the summer we will be largely off-grid.

What happens if we have a cyber attack on our power grid ? Do you have a means to be independent and free from this ?

@travellingthomases

Жыл бұрын

Hi Lawson, yes the local control panel works

As a combi boiler owner I just cant see the justification for spending £2k getting a cylinder like this - yes you can use octopus go to heat it up overnight, yes you can use some solar power in the day to heat it up - which is fantastic, but why constantly try and heat up 250 litres of water 24 hours a day 7 days a week when you can just use 50p worth of gas, to heat up 50 litres of water for a nice long shower between 7am and 7.20 am and then not heat anything for the rest of the day till your back home at 6? The amount of KWH your immersion used in your stats just for heating your cylinder was like double what I usually use in leccy for my whole house per day? *confused*

@handle1196

Жыл бұрын

I've just came across this cylinder and curious to what your comments means asking why would anyone want to heat up 250L 24/7 365. I thought the whole idea of this cylinder was to avoid doing that so who would be heating it fully full time, am I not understanding your question correctly?

Am I right in thinking that you said the Mixergy has a "Solar Energy Diverter?". And then go on to talk about the Eddi - which is the solar energy diverter which costs ~£500 with the optional but lets be clear, 99% required, WiFi module (that attaches to your Meter Tails and reports to the Eddi device when there is excess solar energy). What the Mixergy has is 3 separate Immersion Heating Elements. 1 your 'traditional' bottom mounted and then 2 separate 'top' mounted immersion heaters. One of which you have wired into a manually set up timer and the other which is then wired to the Eddi (solar energy diverter). Also everyone keeps talking about Octopus Go or Octopus Agile or similar, what happens this year when, due to rising prices Octopus removes the Go/Agile tariffs, or there is no longer any "cheap" electricity (as is likely) and all prices are at the Standard, OFGEM, Capped Variable Rates - currently around 27.22pkwh (until October 22) then likely to be 40.83 (+50%). I am not saying that the Mixergy Tank isn't any good. I am saying that attributing its performance to low cost energy is a poor metric. If you have a solar PV array that generates more electric than you use (or has excess energy when your not in) then its almost certainly a good deal. However if you already have a Solar PV Array and an Immersion Tank then buying a Solar Energy Diverter and installing that is going to payback your investment much faster than ripping out a perfectly good immersion tank and paying for a plumber to install a Mixergy Tank.

@GrantThomas

2 жыл бұрын

Thanks for your comment. Yes I already had a Myenergi Eddi solar diverter and before that an Immersun. The twin immersions are at the top the factory fitted is as the base. Off peak electricity is here to stay; even the 'new' Octopus Go has off-peak at 7.5p per kWh and peak at 35p - and using EITHER the Mixergy Schedule OR the Eddi schedules you can heat the whole tank using cheap off peak electric. And with the price of gas it is still a lot cheaper to heat using off-peak electric

@handle1196

Жыл бұрын

@@GrantThomas Is it still cheaper to heat by 7.5p off peak electric than it is to heat by gas? One 3Kw emersion will take 2 or 3x longer than gas to heat the water.

To messy and over complicated ! Put two 125 litre Megafolw cylinders in parallel one on gas or oil and the second on solar tubes. Today 2nd of Jan my 250 litres are at 40 deg C. All free. Top up if you wish with the boiler. It's a no brainer !