sathornlover

Thank you very much, I had checked the page a few times before and always overlooked it, without your help it would never have worked, funnily enough on the Thai language page there is no information on Type 2 only on CCS 2 ...

Thank you again for your hint , which I had completely ignored, although I was aware of the Seal's meager 7kW limitation. I can now add a little anecdote to this: when I informed my PV installer that I would be postponing the planned charger upgrade indefinitely due to the castrated EYD onboard charger, he again came up with the claim that the BYD Seal could supposedly charge 22 KW AC. This time he referred to the statements of the staff at our local BYD showroom. Which unfortunately confirms my already extremely negative impression of these staff, because they are usually constantly conspicuous for their lack of information and extremely nonsensical claims. I have the impression that my PV installer is more inclined to trust the statements of these people. There is no reference to this point on BYD's Thai websites, only the 150 KW DC charging power is advertised. The 2023 catalog also provides no reference to this. really reputable sources for the Thai model 2023. As far as the onboard charger is concerned, I haven't been able to find any so far. In contrast to the Australian model, for example, which was also sold with this 7 KW limitation.

Yes, I am aware of the option and I have already hinted at it slightly in my comments, but it is very interesting to see what else you have written about it. My PV installer suggested that I implement a corresponding Huawei charger as a solution, certainly at a certain price. I then referred to my similarly well-equipped charger. But unfortunately, this great feature doesn't get me out of the annoying BYD single phase limitation either

yes, it works with this charger, and that has tended to be my charging strategy, but so far I have orientated myself according to what the Huawei app has led me to believe...

Also the Seal 2023, thanks for the tip, I had almost feared that too, everything points to that. BYD itself has not commented further, specifically about the onboard charger, at least as far as AC charging is concerned. As far as I remember, all the Thai versions of the car are 7.5 kW and thus significantly devalued, and the fact that BYD gave away the actually really great charger with only a one phase breaker speaks for itself...

I will most likely ask my PV system installer to do this job. If I have understood you correctly, which you have taken so much trouble to explain to me, I think we can now expect the following from this three-phase upgrade of the charger: Firstly, the car will actually be charged predominantly with solar energy, secondly, logically, the previously necessary export imports should then at least be significantly reduced, thirdly, the charging costs should then logically be lower in the most favourable case, at least with this charger, if I adjust it manually or with the help of software with corresponding compatible electricity meters, actually charging almost 100% with solar energy! Fourthly, the discrepancy between the electricity meter from the power grid and the Huawei. electricity meter will decrease considerably. However, I assume that this discrepancy will remain in the one to lower double-digit range if the assumption is correct that the Huawei software at the top level does not correctly represent the actual exports/imports in the event that one phase requires more electricity than the solar system can supply, while at the same time the other two phases or even just one phase exports excess electricity at the same time. However, I think I could live with this outcome. Such an upgrade should: reduce the charging costs where the electricity can be sold to the electricity supplier by at least 50 % and otherwise by at least 66 %, This could mean that the upgrade would pay for itself in between one and a half and seven years ... Unfortunately, I first bought an electric car for which I was given a single-phase device including installation as a free extra. It was only six months later that I decided to have the PV system installed and then another six months later that I received the three-phase ABB as a free extra with my second electric car. From what the Huawei app and also the website on the top level showed me, I stupidly assumed that we would charge both our cars mainly with solar energy. Another six months later, almost a year and a half after the PV system was installed, the electricity provider finally installed the digital electricity meter and the rest is history...

Sorry for that!

Heureka, wow, that's it, now I've finally understood it, thank you very much for the patient, small-scale curve discussion, please forgive me for my clumsiness, lack of solid basic knowledge of electrics, last night when I read this I found it very difficult to accept what you were asking me to do, but after a good night's sleep everything is fine. and I also agree with your assumption that the Huawei software unfortunately omits this necessary import and export,-(

About 21kWh „Est. solar energy 0 kWh (0 %)“ ????? The device does not seem to actually detect the source of the energy although it claims to, cause is not configured with the grid meter, probably not compatible too …

I think you're right. It's definitely worth trying to connect the charger in three-phase mode and checking all the wiring, at least as far as the fuse box. I don't need the 11 KW charging speed. But maybe I'll be lucky and the problem will be solved or at least I can rule out this source of error, However, I am not yet sure who I will be hiring to do this ….

But now I'm very surprised. The third diagram below shows that only at 3:00 in the afternoon until 4:00 in the afternoon electricity was consumed again partly from the power grid, between 8:00 in the morning and 3:00 in the afternoon the electricity was generated exclusively by the sun. dark green indicates that the electricity generated by the sun was consumed and yellow by the power grid. Light green is the electricity that is exported. It was a normal sunny day for this month and the system produced 47kWh on this day, which is normal for this time of year. However, it is often over 50kWh. When the sun goes down, I can use the app to manually set the battery to charge less, so that I usually use 90-100% of the electricity generated by the PV system. the 7 kWh from the grid is the average load that I have even when I am not using the charger

That is correct. The ABB charger is actually operated in single-phase mode, although it can also be operated in 3-phase mode. Does this show the green phase A curve in the diagram?

As I've already emphasised, I'm not in a position to interpret the diagram from a professional point of view, but the conspicuousness of phase A correlates with the charger when it's in operation. Not only that, it even seems to support my suspicion that one phase is only drawing current from the grid and is being looped past the load, in this case the car battery, and inverter and passed straight back into the grid instead! This would also explain the strange coincidence that the sum of the discrepancy between imported and exported current units is relatively equal. As I am unfortunately not a real expert in this field, I am not yet sure whether this extended thesis would even be tenable from an electrophysical point of view....

Unfortunately, I have not made any progress on this matter to date. Visits from PEA and the installation company have not produced any useful findings either. The first electrician who checked the system was convinced that the whole problem had nothing to do with the EV charger. The second electrician, who was actually the main person responsible for installing the whole system and only had time in December, was much more open to my assumption that it must have something to do with the charger, but couldn't find anything else either and was of the opinion that I should be happy with the current situation and the abundant power generation ... The visit from PEA unfortunately took place in my absence with the same negative result and the attempt not to use the charger during my almost 2 month absence failed because my wife was not willing to charge her Ev outside. Today I received a message from the head of the installation company in which he apologized profusely for being so late and told me that they had thought about it again and had now come to the conclusion that it might actually have something to do with the charger. He sent me two screen shots showing the entire course of the day from February 1, 25 of phases a, b and c. It is noticeable that phase a is in the negative range during the time when the charger is in operation. From this it is assumed, and I quote “I think EV charger may mis-install. From the plot, it's power of phase a, b, c character. It seem like one of them used heavily compare with other phase.” To be honest, I myself am not in a position to draw any further conclusions from this. In the hope that I can get some helpful suggestions here, I am uploading the 2 screenshots here again.

or like a certain Austrian who asked the Germans back then to "give me four years"... it's boring as hell. History is full of guys like that, who the mob calls and then can't get rid of so easily!