RossJ

Hi @Seba @Chriull, I just thought I'd post a quick follow up to our conversation in late March about my S18 not fully charging. I eventually pinned the problem down to the front-right pack (20s1p). With this pack disconnected, the charge cycle behaved as expected with both CC/CV phases (and EUC World controlled it just as you described). I had been a little unsure as to what to expect during charging as I don't think the wheel ever fully charged. I recently opened the problem pack and found the lower 5 cells at 3.7V and the rest at 4.1V. KingSong have used a Neotec NT1664A protector which has 4 discrete supervision blocks of 5 cells each. My suspicion is that this is a BMS board issue causing extra drain on these 5 cells. My plan at this stage is to charge each of the 5 cells (one at a time, in-circuit) back to match the rest of the cells. This probably won't fix the root cause of the imbalance, but hopefully if I allow the normal passive balancing to occur regularly enough, it won't be a problem. My wheel went for about a year without recharge (remained above 70%), which I don't intend to repeat! Thanks for all your help. Loving the app (and EUC).

I just noticed the erroneous current reading was reflected in the data log too. So the data log shows the voltage rising but no charge current (just a small load). I was watching the charge screen on EUCW and it certainly showed -2.5A.

Correct. The two smaller rear packs contain the 2x10s sets.

I think for the moment I'll assume there is an issue with either the charger or pack/cells and try to resolve that first. Probably everything EUCW is doing will then make sense. The charger is pretty basic with no configuration. I'd assumed it was so basic as to not even do CV. But you may be correct in that cell imbalance is just preventing it reaching that point. I'll investigate further.

I don't. However I do have the data log. Voltage rose from 73.9V (58%) to 82.5V (95%) over about 2.5h. Charge current was constant at around 2.5A before abruptly ending the charge.

I believe the sequence was that the charger stopped charging (green) then shortly after, EUCW powered off the charger via Shelly. The wheel then powered off and communication with EUCW ended. I have noticed that starting a charge cycle in EUCW when the EUC is already charged (so the charger doesn't begin charging), leads to EUCW turning off the charger again within about 15s (presumably due to the 30W minimum you mentioned). I assume this is the answer to my question as to why the charger was powered off without waiting for an additional 1 hour. I may need to investigate if I have a charger and/or battery issue, as I've not seen the charger ever enter CV phase. Charging just ends (green) before the voltage reaches 84V or the current begins falling from 2.5A (CC level). I had assumed balancing occurred after charging was complete (green), but if I understand your explanation correctly, it's actually occurring during CV phase.

I'm up and running with the Shelly Plus 1PM and EUC World has controlled a charge cycle mostly as expected. I do have a couple of questions about it though... (my wheel is a standard KS S18 of 2022 vintage) 1. I set the charge level to 100% and balance period to 1h. In spite of this, the charger was powered off moments after charging was complete. Is this to be expected? Perhaps there is a minimum voltage which must be reached to be considered fully charged and thus balancing will be engaged? If so, what is the threshold? Or does the wheel actually report when it's balancing? The charge cycle only reached 82.5V (95%) before charging ended. 2. I have observed a couple of times when I connect the charger that EUC World showed a current of around 0.3 to 0.5A on both the main and detail screens, in spite of the charger indicating charge in progress (red light). I had just assumed that for some reason the charge cycle hadn't actually started, so I disconnected the charger and manually powered on the wheel before reattaching the charger, which appeared to correct the situation. Now that I have access to the charge screen of EUC World, I saw the same thing happen only the charge screen correctly reported -2.5A whilst the home and detail screens reported 0.4A. After a short while (a minute or so I think), the 0.4A changed to -2.5A across the app. This appears to be a display bug of some sort. Is this a known issue? I'm using 2.40.0 on a Pixel 7.

Wow! I'd totally missed that.

Thanks Seba. I'll give the Plus xPM a go.

I'd like to use the EUCW charging support in Australia. While I already own an HS100, I've found that the HS110 is not possible to buy anywhere. Looking into the Shelly Plus Plug variants, it seems they don't make an Australian version. I could use one of the foreign variants (probably the 'S' model - European) with a pair of plug adapters, but a stack of adapters is not the most reliable way to connect a charger. However, I can more readily purchase the Shelly Plus 1PM (module) to which I can attach a suitable plug/socket and housing. I assume the capabilities and API would be the same as the plug variants. 1. Would the Shelly Plus 1PM work with the current EUCW app? If not, is it possible (with minimal effort) to add it? 2. Is the Shelly Plus Plug S the best alternative option for use in Australia? We use 240V @ 50Hz. I assume there's no other aspect of the plug's specification I need to be concerned with?