off grid in germany

[binkino]

Last night I swaped the system between my "WinuAE" and the old "Server" Intel D525MW, so the self 3D printed housing matches it's purpose now
(red case with fan on the top with the C= logo is now the WinUAE machine)

Then I took an old SSD with an old backup of my W7 system and surprice it didn't crash on booting (as the hardware changed, some ICH driver family...)
but the VM can't start the Linux VM I have created on my server.
W7 is 64 bit, the Linux VM is 64 bit ... and that's the point. I need V-hyper / virtualisation, that the board can't provide.
After many searches in the web I found out, that I only could run a 32bit VM Linux ... ok. Was a try.
I keep the VM running it on my Server, that runs flawless (knocking on wood? haha)

There is one more thing that could come in handy ...
These RS485-Network adapters ... https://amzn.to/3Lc2sOw ... so if I understand it correct, it simulates a COM port on the machine and builds a "bridge" over the ethernet to the RS485
May be next month.


Edit:
Have now VM installed on the Lattepanda, takes forever to start but if it is once stared, it runs well.
Parallel runs the battery monitor software and the dos batches. Still have 5 pages open (3 tablets, 2 on my PC) and they load with is lightly more delay compared to my server that is standing upstairs close to me, but acceptable.
So I think about a housing for the Lattepanda and leave it there for the next time.
(The PI was never meant to run the logging and serve more then one open page but it kept up very well until I went crazy haha)

[ClassicCrazy]

How is that rs485 different from just using one of the $1 converter boards ? You get the rs485 data to a com port -  then can do what ever you want to with the data.
Larry

[binkino]

I am not sure how these protocolls work.
I was also thinking about using one of the small converter boards and wire them to the PI, so I have not the USB stack "overhead" the cpu has to handle with.

I guess it made everything easier and that all could gone another direction if they populated the serial connector at the BMS. But it is what it is now

[ClassicCrazy]

I am not sure how these protocolls work.
I was also thinking about using one of the small converter boards and wire them to the PI, so I have not the USB stack "overhead" the cpu has to handle with.

I guess it made everything easier and that all could gone another direction if they populated the serial connector at the BMS. But it is what it is now

If someone made an interface already that works on the rs485 then it is pretty easy.  They pretty much all use modbus.
I think you probably saw the videos I made where I used rs485 to esp8266 . I used it because the smarter people had made the modbus programs work so I only had to figure out how to connect it all together. Nice thing is the pi gets all the data via it's built in wifi so no wires going to it other than the power cable.
Larry

[binkino]

Thanks, Larry

yes

One day we will trip over what we are searching today



BUT I have found out now, why the pages sometimes don't load or load extremly slow ...
After that now, the answer was so easy and obvious ... but you have to find it
If more then one page is trying to load the data text files, then a file can be blocked while it is loaded from another page ...
So I added two lines to my batches, in it the data text file is copied to the web share folder and then it is also duplicated.
Each page loads it's own text file now. Did this also with the current.txt.
Now it is all running great, like I wanted.

I also mounted the Lattepanda on it's "new" cooling plate and hung it by it's cables in place

[binkino]

I totaly forgot to update here ...

I make it short, I have it all on my page: http://a68k.de/pv/umbau4.htm
Google Translated: https://a68k-de.translate.goog/pv/umbau4.htm?_x_tr_sch=http&_x_tr_sl=de&_x_tr_tl=en&_x_tr_hl=de&_x_tr_pto=wapp

I installed another inverter and rearranged the lower part on the installation board.
The old inverter (Westech 3000 Watts) is now in spare, if things go wrong with this chinese thing.

I still run the battery software on the Lattepanda.

The PI is gone and I installed it in a VM with Linux installed on my server running the php and logging.


The inverter also has RS485 but doesn't communicate with the battery, although it should be able to "speak" Pylontech BMS.
The Chinese seller on ebay has very... limited knowledge and ability.
There was no software included, I downloaded it from the Powland page (100% Easun!), and somehow it works to connect.
(After a lot of explanation and discussion, the seller linked me to a piece of software, but it can't even establish communication. All incapable!)
I was at least able to make the settings wich the display menu does not offer, such as setting the communication method (Pylontech).
However, it never shows the correct SOC of the battery. The cable is correct... I don't know.

Also, this Wifi device can only be used with their service. (A lot has to happen before I entrust my data to the Chinese!) No way to read it on the local network. That was kept secret in the auction.
I see it's IP in the network ... but that's all.
I have already opened the Wifi device, a ESP like device is inside.
Well, one day there will certainly be someone who will read the programming of it and convert it or can program something completely different on it...

Now I'm definitely out of the 3000 watt limit

... and the installation somehow looks good too

(I also updated the terminals for the PV strings)

[binkino]

So .. a small update from my side

In April I bought a second 10kWh RosenSolar LFP battery, as we pay no taxes now in Germany for solar products.

First, all cables and the wall mounting bracked were missing...
The seller send me a cable, but surprise, they changed the connectors. So waiting 2 more weeks.
Battery connected, looked all fine - BUT ... the first battery lost 30Ah of the 200Ah in one year?
The seller will meet one of the Rosen Solar guys on a convention (?) in 1-2 weeks, he want to talk to him in person about that all.
There were also high voltage differents between the cells and warnings, but seller was not able to get something that helped me, the year was going by and I forgot about that.
But I still have the screenshots and videos about that. That came back in mind, as the new battery also shows this behaviour.

While waiting for something that solves and helps ...

What I found out earlier, that the batteries use the Pylontech protocolle. And now it is by 99,999% sure, that they use Seplos BMS in the batteries.

I contacted Seplos and they confirmed my fears, that the cell reistance are too different (not matching cells).
So some single cells get too fast charged up, other don't, there is no active balacing happening, and cells deviate too much.
I was already thinking about to add active balancers and have ordered them now from Aliexpress and they will arrive in one week.
If some cells are to early fully charged, the whole battery will not charge full up to it's capacity and the displayed capacity will shrink.
I hope, that these active balancers will solve the problems ... (and no damages accured already)
Actually it is the situation, that the one year old battery doesn't charge up to full 100% SOC anymore (today max. 54% SOC) and I have now disconnected the new battery to give this battery a better chance, watching it today ans tomorrow.

(It is also a harder task, as I have two Midnite Classics they can't charge LFPs from their nature and I used the guides here to setup the voltages, that seems to work. May be it is time to get newer chargers? Bute they work and are bullet proof ... I don't know what to do at this time. I make decissions when the balancers are installed.)

And a viewer of my YT channel has now written a Python script for me to get the datas from this chinese inverter brick. (Easun/Powland)
No need for using the chinese servers (their wifi dingle only connects to china server!) and ths USB connection was not stable.
I have now made a cable with one of these USB/RS485 adaptors, like I use on the battery, that works perfect and stable.

That for update to all who are interested in this ;-)

Ah now I am thinking about to use the same/similar Python to read the both Classics ... So I don't need the VM with Linux anymore (earlier it was installed on a PI to get the datas...)
Having the values in a database isn't that bad idea.

[boB]

binkino, would love to see your YT channel.

When I search for you I find bikinis which is fine with me but not your content

boB

[binkino]

Hi boB,

yes that's true, and bikinis are much more interesting

I use the name "A68k" in Youtube, @a68k_de
https://youtube.com/c/a68k_de

Andy

[boB]

Oh Yeah !

Turns out I am already subscribed to your channel !

Thank you