Is it this one? GitHub - Patrick762/hassio-bluetti-bt: Bluetti Integration for Home Assistant
I don’t have a server to run it on, unfortunately, except my router, which has only Python 2, so it might require a lot of work ((
Still, can you please share your script for the mentioned behavior?
As for crashes, do you mean when using the library, or the station crashes even when not used through the API?
With crash I mean: The AC200L becomes partially unresponsive. Buttons on the unit do not react, Bluetooth does not connect. WiFi seems to still work. but the BluettiBT can not use that.
Regarding the integration: Yes this is the one. If you have no server: try a raspberry PI works good with homeassistant.
I’ve just understood another huge issue with smart power plug approach, that cannot be fixed by HomeAssistant:
3. If I plug more consumers (e.g. 3000W) than station’s power (2.4 kWt), with grid connection it will just take 600W from the grid, but when grid is disabled by the plug station will shut down (after it’s short overload timer).
Not sure if 3KW i a good idea for continous use. This might be too much for the inverter over time. In that case you should probably upgrade to a bigger model or get a second AC200L.
I think I understand better now what is going on.
If I check Input side (grid) and output side (load) in the bluetti app I see that the values for Voltage and frequency are exact the same.
This means: The inverter couples inductive or capacitive to the grid to synchronize Volt and Frequency. For this it needs a small dummy load present to the grid to have a current flowing that can be monitored. My tasmota plug shows a relatively high current flow but a very low power factor (aprox 0.2). This means the grid usage we see is only for synchronizing to the grid itself. I can further confirm this when I disconnect the grid (aka turn of tasmota plug). Then the Voltage and Frequency deviate slightly from the grid. Bluetti also mentions a short switch over time (aprox 22ms) in USV mode which resembles the ramp up time of the internal generation of voltage and frequency.
Having said that I think in my case it works best to just use the tasmota plug to disconnect the AC200L from the grid during high cost periods (during the day here) and reconnect it in the night to allow re-charging of the battery, which is my original use case. It is sad that bluetti seems to have no control switch to disable the dummy load but I guess this is part of how the unit is designed. That way my solution should work for me for the moment. My other issue with the unit becoming offline for bluetooth: It seems the way the HASS plugin is connecting to the AC200L seems to cause trouble. I have switched to permanent open connection and this seems to have fixed the issue so far.
@ftrueck I’m not so good with electrics to understand this, lol, but do you think such design flaw/decision can be fixed with the firmware update, or is it how hardware is implemented and nothing can be done?
@snmya that is a really good question indeed. Unfortunately I have no answer as I did never do a hardware analysis on the device. If bluetti implemented in its hardware design the corresponding necessary features, it could be possible to include this in future firmware updates. If the design of the hardware does not include this then no.
@BLUETTI_CARE: can you ask your developers if they see a possibility to tie dummy load to the charge/discharge schedule? It would be enough to disable the dummy load in discharge setting and enable dummy load in charge setting (schedule). If you want to be extra fancy: Do an additional control switch in advanced settings called “Solar autonomy mode” which will tie grid input dummy load to charge/discharge schedule in UPS settings.
Hi @ftrueck, It seems that after switching to “permanent open connection,” the issue has been resolved — is that correct?
When you mentioned, “If I check the input side (grid) and output side (load) in the Bluetti app, I see that the values for voltage and frequency are exactly the same,” — that’s expected. When using grid charging and there is an active AC load, the system enters bypass mode, and the voltage and frequency will sync exactly with the grid.
If your goal is to disconnect from the grid during non-charging periods, but still allow charging at other times, you’ll need to control the charging power by limiting the current. A display of 0W means the input is 0W, which already meets this objective.
When you mention the “actual power draw is around 90W,” could you let us know how the cables are connected, the power rating of the load, and where the power meter is located? Ideally, please record a short video, upload it to a cloud drive, and share the link with us — that will help us replicate the issue more accurately.
Currently, we do not support the use of a “dummy load” as you described.
Many thanks to snmya for the input and discussion on this matter.
@ftrueck Hello! A followup question about HA: can it work with Bluetti via WiFi, not Bluetooth? If not HA, maybe there’s another lib that can do that (like query SOC at least)? Just found out that Bluetooth module present but not accessible on my router ((
Unfortunately not. I did not find any project that uses bluetti API via web to access the values.
Unfortunately the unit is again not accessible via bluetooth. I do not know what is happening there but the unit simply refuses to react to bluetooth at all. I can not even determine specific conditions that lead to this loss of connection. It just happens randomly it seems.
I hope my drawing makes things a bit more clear.
Hi @ftrueck, Regarding the issue of Bluetooth connection failure, please troubleshoot according to the following steps.
Here are some basic troubleshooting steps for connection issues:
Bluetooth Connection Troubleshooting:
As for the problem of power loss, it indeed seems to be quite high. We will conduct tests and try to reproduce the issue, and we will give you a reply next week.
When I have the Bluetooth issue my AC200L becomes unresponsive to button presses. It only starts reacting again when I disconnect PV, Grid AND the B300K that is also connected to it.
I have no idea how this makes the device unresponsive but I can not press any button on the device until I disconnect the mentioned things. Then I usually power off the AC200L and then I start it again and the issue is solved.
Regarding the power loss tests: Just to make sure it does not get lost in conversation: My AC200L has a B300K connected to it. Maybe this is relevant for the tests, but I do not know for sure.
Anyways: Thanks for your help, I highly appreciate it.
Hi @ftrueck, You are welcome, it’s my pleasure.
This kind of issue is indeed rare. We still would like to know your firmware version, as it will help us with testing and reproducing the problem. We look forward to your reply.
Hi @ftrueck, Thank you for your feedback. When the power station is connected to the grid, it will inevitably draw a small amount of electricity from the grid, which is unavoidable and something we cannot resolve.
Regarding the issue of unresponsive buttons, could you please try to reproduce the problem, record a video of it, upload the video to a cloud storage service, and then share the link with us? We would like to conduct a further analysis of this matter.
Thanks for the reply. Regarding the unresponsive buttons: The problem is I can not reproduce it. When it happens, the situation is there. If I could reproduce it easily you would already know unfortunately.
Regarding the power draw: I know that it is technically necessary. But I have a drain of 90W which is a bit high for just tracking the grid. Having said that: I know there is a relay on the grid side. I can hear it, when I restore grid power to the unit. I can see in the app that before the relay clicks, the power, voltage and amps in the grid info page are all zero. After the relay click they refresh and show actual values. So in theory there is a way to disconnect the unit from grid physically through the relay. That is what I was referring to. The idea is simple: When the time schedule says discharge, then disconnect the unit from grid via the existing relay on the grid side of the unit. If the schedule says charge: reconnect via relay. The only requirement would be that the relay can be controlled via firmware, which I hope. Then this would be possible. Additionally a setting to control this behavior and all is fine.
Hi @ftrueck, It seems that the issue of unresponsive buttons is an occasional problem, which was just a temporary freeze. Now this problem has been resolved.
Regarding the relay issue, you’re right. When the current is quite low, say 0.1/0.2A, the relay is disconnected, and it will still show 0W. A certain degree of self-consumption is unavoidable, and it does exist in the AC200L. Currently, we cannot solve this through firmware updates.
If you agree, we can also replace a unit for you. Although we don’t think replacing one will solve all problems, you can test with another unit. Please contact us via private message and provide the order information so that we can arrange it for you.
I think i figured out what the problem is. The AC inverter in all AC200L units is not working the way I was hoping. It can not handle capacitive loads correctly.
Here is how i figured it out:
Here is what happened:
So as a conclution:
