@tim441 Will do and thanks. So do you have 3 phase into your house? If yes, did you always have it or add it, and if so how much did it cost? My understanding is it is 3 separate feeds and you can jump between them or use all 3 of them at once. I remember reading about then when having the EV charger installed and it said you could only have 6kwh or so unless you have 3 phase, but to be fair, with smart charging, that is more than enough for my MG4, especially as Octopus are bringing in a 6 hour per day cap that can be at any time of the day, to balance the grid.

I've just got to stop looking at the solar app every minute 😉

@fleecy i too have a MG4! 

I only have standard single phase to the house. But as 3 phase is available at the pole the DNO (SSE Networks in my case) was able to switch the phases. The phases will always have some variation between them as the number of houses, demand,  solar supply etc will not be equal.

My switch of phases has probably resulted in a drop of average voltage of up to 2v. Enough to make the difference and take me from regular overvoltage events and inverter tripping to almost none (to date!). Its about a month since the change and includes periods with significant solar prod. So looking good.

@tim441 Fab car. I bought one in 2023 and loved it so much, I bought a 2026 one - lots of lovely new changes and I've just charged it to 100%, with it saying I've 314 miles. It's funny how being a volt head now, those extra 50 miles will make so much difference. I had a year to go on my PCP but the balloon payment was £15k and the car would only be worth £12k, so negative equity. My dealer told me I could have a brand new one with 0% interest and a balloon payment of £10k if I did a voluntary termination. It was a no-brainer.

Re the tripping, I didn't have it yesterday but its a bright one today and supposed to be for the next week (ha) so it will be interesting. Currently shoving 3kw into the grid. Making hay whilst the sun literally shines 😉

@fleecy yes mine is 2023 .. Trophy... via business... 4 year contract.

I will definitely stay EV. But guess I may need to look at BYD for one option. 

Potential V2G, V2H will be part of the thinking but in reality not crucial. I'm sure further down the line it will be standard. But of course likely to require a charger change ...or other changes to wiring etc.

@fleecy - thanks for adding your experiences to this thread.

I clearly need to better explain on the Forum how and why G98-certified inverters are detaching themselves from the grid.

However, these concepts are very difficult to grasp, even if I were to create moving diagrams!

What I've actually been doing is designing & building a set of 3D demonstration models which illustrate the way in which the grid operates. Ie that's the flip-side of the issues which you and Tim are raising here.

That means I'll need to run a 'live' seminar in which attendees can be introduced to those concepts and see how they might apply to the solar panels, EV chargers, heat-pumps and storage batteries which are rapidly being installed in our homes. It needs to be an interactive seminar, rather than a lecture or slide-based presentation.

In short - domestic inverters shouldn't be dropping off the grid due to over/under volts.
Something isn't right if this is happening, but it might be in a neighbour's house rather than yours.

There is a new 'Standard' being implemented by the ENA (Electrical Networks Association) which will lower the domestic 'LV' supplies from the 240v we are used to seeing.

A reduction of 6% is roughly equivalent to allowing households to export up to 6kW per phase, rather than 3.68kW.
But I need to explain this in greater detail because it won't solve the problem of inverters which persist in exporting above the 253v threshold.

Time is short this week. I've just come out of a meeting with NESO, and I'm preparing for a meeting with a senior DNO engineer. This over-volts issue is on the agenda for both meetings.

Please give me more time to think how I can respond to the important problems you're raising...
... without needing to run a national roadshow accompanied by a van-load of demonstration kit.

@transparent Your effort is massively appreciated, not just for those who like the technical side of it but more for the masses who just need it simplified enough to make their own decisions. A modern, dynamic and decentralised grid would be fabulous. A five minute walk and I can look out from the Fylde coast at the forest of windmills offshore. We need to be able to get their output into every home, especially in the winter when solar is way down.