MMcGill

Yes - Already have the 3 phase Zappi installed, was required to get house signed off (no electric car quite yet though!)

I don't seem to be able to live within the battery - showers all happen 6-7am which creates quite a load to reheat - the battery has pretty much been depleted through the prior evening (cooking dinner etc) and night by that stage

Good question - I assume that as I'm three phase I need a three phase Eddi, certainly their website asks what your power is and points you to that version (coming this summer). Does the single phase have three clamps as an option - I thought it only had one?

If only the ASHP could be 'smart' enough to know when the PV generation is in excess and boost the tank temperature - that would be perfect, perhaps Home Assistant - but beyond me.... I agree - an immersion option would be best, will likely go down the Eddi Three Phase route when it's available.... looking to future proof as much as possible...

If only - I forgot to mention - Octopus have been absolute rubbish - I'm still waiting for a working Smart Meter (and have been since October last year)... 3 phase is a challenge for them all (lack of qualified engineers), on top had a faulty comms unit, then the comms unit couldn't get a signal... now waiting for an SKU2 comms unit to hopefully sort that - based near York...

Hi all - I've read lots of the threads on this but haven't really found a decent solution - I may have missed something! I've recently completed my self-build. I have the following; 1 - Three Phase power supply 2 - EcoDan ASHP and Water Tank 3 - Solar 13.5kwh on the various roofs 4 - 10kwh of battery storage (looking to increase to 15kwh) My challenge is that I generate significant excess of solar since April, probably about 20-30kwh a day... I don't have an electric car yet and if I did would only make use of that excess when the car's at home! Ideally I'd like to optimise the hot water... The ASHP hot water heats 24x7 at the moment and tank temp is set to 50 degrees - ideally I'd set the 24x7 to something less, lets say 40 degrees and then set a preset to come on during peak sun, lets say 11:00-15:00 at a much higher temp - lets say 60 degrees... I'd then hope that the use of showers etc wouldn't drop it much past 40 degrees meaning most of the hot water is always being generated by the solar.... Bit of a faff and relies on me figuring out presets (has anyone taken this type of approach)... The only alternative would be something like a MyEnergi Eddi - but... using the immersion wouldn't be as efficient and more important - I'm waiting for the three phase one to become available! What approach have you done and what can I learn! Many thanks!

Thanks - new build so new Octopus meter so fine from that perspective

14kwh heat pump for me - 13.6kwh solar over three phases… bit I’m still trying to figure is; if solar is outputting 12 kWh and the three phases are drawing; 1 - 8kwh (where the heat pump is) 2 - 2 kWh 3 - 0 kwh I would hope that we’d us 10 of the 12kwh available, however, this is the bit i don’t know, if the solar is on the phases evenly ie 4kwh each will I instead have to rely on the meter to recognise the balance of incoming and export; so using the above; 1 - Using full 4 in but draws 4 from the grid 2 - Uses 2 exports 2 3 - exports 4 so the meter recognises the above so nets it to 2kwh export. or is there something in between to ensure the full 12 of solar is used before pulling anything from the grid?

Hey all - my ASHP supplier has installed a single phase ASHP rather than the three phase I ordered and is trying to convince me it won't matter - The house has three phases available. Now I get that the electrician can balance across the phases so from a supply no problem, but I also have a 13kwh of solar with a three phase inverter, his view is again no problem as the conumer unit will put power to whatever phase is calling for it... Is this right, I',m not in the detail of this one and worried that the ASHP will only be able to make use of one phase worth of solar? Any pointers to reading material / your views would be helpful!

And another couple of pictures of the stations..

Hi all - I know this is very late after these original posts but it seemed the right thread - I'd been debating Aerobarrier https://www.aerobarrieruk.co.uk for some time, I really wanted to build a house that's as efficient as possible but was stuck with a traditional build (brick and block)... My builder knew this and supported me with air tight roof membranes, parge coat, and air tight tapes to all windows and doors but I didn't think this would get me as far as I wanted - the passive 0.6ach I spent quite a bit of time on the phone with the folk at Aerobarrier who were really patient with me as I asked them lots of questions to deal with my internal debates, but eventually took the plunge - the cost wasn't crazy so I had convinced myself to give it a go... The Aerobarrier team spoke with my builder a few weeks before to run through all the work he had completed and they had agreed that the best stage to do this work was pre-plaster so my builder was a little concerned at what the initial test result would come out at! The team spent most of the day on site, initially checking the completed work, and then using an air heater to warm the house (which helps with the sealant), the kit consists of several 'stations' set up around the house which is a computer controlled mist that comes through nozzles on tripods which contains the sealant. The initial test on the house came out at 1.84ach which we were fairly happy with, the team then kick the process off and I watched the house fill with the sealant, which runs for about 2 hours, as it's going you can start to see the numbers drop as very small holes are plugged, after a while a member of the team entered the house to spot larger holes (you can see where a lot of sealant is attracted to the holes as it forms a white mass) and manually sealed these leaving the process to continue to run... And... The result for me was an amazing 0.41ach at the end of the day and this is pre plaster and floor tiles which I hope will at least keep me at this level - A very happy end result for me. I thought I'd share my experience with you all as I know this is newish to the UK - I'll be waiting for my final post build air test now and making sure no new holes are made in the envelope! I've included a couple of pictures which may help give a view of what I've explained about, happy to take any questions....

Thanks will get in contact with them - what’s your view on how hard wearing / long lasting this is as a floor solution?

Hey all - looking for a bit of advice, we're getting to the stage of our new build where I need to think flooring, we're UFH throughout and have a large kitchen/diner/snug area that flows through to a boot room and utility room. I've been looking at various floor types one of which was polished cement which now seems to flow more towards micro cement as an option which looks like it gives more options on final finish, hard wearing and not susceptible to cracking... However I'm struggling to find many posts on the forum of users that have gone down this route or suppliers where we're based (between York and Harrogate) where we can physically see this in operation. Any help, advice or pointers gratefully received!

Maybe - think I’ll do a parge coat and air test at first fix, see where I am and decide the ..

Just had a quote for a 4000sqft house for this which was quite reasonable… very tempted but would like to find people on here who have already had it done..