MikeSharp01

Just discovered another wrinkle it looks like the power companies are running, if you have a battery installation your export tariff is set at 50% of the normal because they cannot determine if your export is coming from grid derived energy you put into the battery!

I am trying to do it all myself, it looks like I can other than the MCS bit - I will be seeking an MCS sign off but I want to do the install myself.

When installing PV the local distribution network operator (DNO) needs to be told if the installation is more than 3.9Kw (ish). For those in the know the G59 form, which was the route for this communication, is now defunct and the new G99 process is order of the day for grid connected PV schemes above 3.9Kw, ours will be around 7.5Kw so we need to go through the G99 process, via form A1-1 (simplified). Before I ring UK Power Networks I was wondering if anybody has been through G99 and can give me a heads up on how it was for you. I want to avoid using more than one phase because of the extant cabling and the dangers of having using more than one phase across what it otherwise a domestic site. So I am going to try that approach first. One thing I have not provisioned for is the G99 relay I suspect I need in here somewhere, I guess it goes just after (on the way in) the incomer breaker? Although relays seem a lot less 'talked about' nowadays! Our schematic of 2017 is attached and I am also wondering how I might control this so I don't end up exporting the battery output or, more importantly, using it to charge the EV (our next car will be an EV) and then have nothing to get us through the night. I wonder if the various inverters are / some are able to cope with this complexity without active control? Any observations gratefully accepted - perhaps I have more than 2 problems?

Yep it is a terrible job and does not meet any of the leadwork standards. Some good examples here. https://leadsheet.co.uk/service/rolled-lead-sheet-the-complete-manual/

Welcome to THE forum for self builders, practical eco warriors and others of like mind @Keeko. Great kick off post - sounds like some of this might make some of the drab parties I have been to much more fun?

Just another money for old rope monopoly.

Just get it sorted to a manhole on the site somewhere and ensure its deep enough 1:40, from everywhere you might build then make your own connections to that. Simples. Somewhere you are not going to build.

Interesting challenge if you are up for it, to find a name unique in the UK. You can check using the PO postcode finder if it exists anywhere else.

Right by the kelpies - what fun.

39Kg / M2 seems ridiculous to me.

I suppose you could think of this a bit like a loft where you are not expected to have a dance party. ( which I guess is what the 1.5kn is about) can yiu stiffem up the wall a bit to help?

Welcome to THE forum for self builders and like minded people - where are you in Scotland?

They implied that they had it made for them, so probably Chinese, but as it has the Mitsubishi compressor it must be some sort of hybrid, I was wondering if it was any good - talking to them makes it sound very good but some independent views will help me.

Toddled round Build it Live in Kent today and came across Warmflow with their own ASHP unit - it seems that it ha an inverter controlled Mitsubishi compressor at its core, the 6Kw version seems to have enough grunt, can modulate down to 2Kw, for us and unit looks very tidy. Is there any experience of them out there?

Yep you need to trim to size and don't neglect the diagonals as length is one thing and square is the other.

Interesting!

We used them for the pipe no issues.

I take my face with me most places - agree NEC is best but they can all be amusing in the people watching sort of way - we will probably drop by Build IT Kent this weekend - just for the crack!

Looking good.

We have a 3 module option from BT which gives me wifi in the workshop up in the hillside works a dream. It they are wifi homespot 9s they also dupe the domain so common login across them and our in house system.

Sounds like an interesting challenge does it not! I dimly recall the frustration that @Jeremy Harris had with insulating his tank so I would want to avoid it if possible.

Welcome one and all to THE forum for self builders and like minded individuals.

One concern is where to put / encase the buffer so as to ensure it does not ad heat into the building - its all a trade off. It must be possible to use a multi zone UFH as its own buffer in some circumstances - its a control thing. After all, in an ideal world, you don't want it running anywhere other than at a good COP.

Wondered where you were.

where is wingdings in the font drop down and does this not use the ASCII set anyway? Encrypt everything or politely ask for your data not to be transmitted over Huawei kit and see if that gets you anywhere - it won't. HMG are being driven - as they always are, by cost £ now and not cost £ in misery later. Here is a brilliant opportunity for UK PLC to develop a technology lead and we sell out - don't get me started.