Author Topic: off grid in germany  (Read 13782 times)

binkino

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Re: off grid in germany
« Reply #90 on: May 16, 2022, 08:05:29 AM »
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 :D but it kept up very well until I went crazy haha)
« Last Edit: May 16, 2022, 10:28:05 AM by binkino »
PV-OUTPUT: http://pvoutput.org/list.jsp?id=38617
Classic Lite 200 + Classic 200 + Westech Combi 3000 + 12x240Wp + 12x255Wp + 10kWh LFP
http://a68k.de:81/Solar/Monitor_LC2.php

ClassicCrazy

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Re: off grid in germany
« Reply #91 on: May 16, 2022, 10:25:13 AM »
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
system one
Classic 150 , 5s4p  Kyocera 135watt , 12s Soneil 2v 540amp lead crystal for 24v pack , Outback 3524 inverter
system two
Classic 150 ,5s 135 watt Kyocero , Jakiper 48v LiFePO4 , Outback VFX 3648 inverter
system three
Midnite KID MPPT 24 DC in to  12 volt AGM batteries

binkino

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Re: off grid in germany
« Reply #92 on: May 16, 2022, 10:31:36 AM »
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 :)

PV-OUTPUT: http://pvoutput.org/list.jsp?id=38617
Classic Lite 200 + Classic 200 + Westech Combi 3000 + 12x240Wp + 12x255Wp + 10kWh LFP
http://a68k.de:81/Solar/Monitor_LC2.php

ClassicCrazy

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Re: off grid in germany
« Reply #93 on: May 16, 2022, 11:32:39 AM »
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
system one
Classic 150 , 5s4p  Kyocera 135watt , 12s Soneil 2v 540amp lead crystal for 24v pack , Outback 3524 inverter
system two
Classic 150 ,5s 135 watt Kyocero , Jakiper 48v LiFePO4 , Outback VFX 3648 inverter
system three
Midnite KID MPPT 24 DC in to  12 volt AGM batteries

binkino

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Re: off grid in germany
« Reply #94 on: May 21, 2022, 07:29:55 AM »
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 :D
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 :D
PV-OUTPUT: http://pvoutput.org/list.jsp?id=38617
Classic Lite 200 + Classic 200 + Westech Combi 3000 + 12x240Wp + 12x255Wp + 10kWh LFP
http://a68k.de:81/Solar/Monitor_LC2.php

binkino

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Re: off grid in germany
« Reply #95 on: October 26, 2022, 02:00:12 PM »
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)
PV-OUTPUT: http://pvoutput.org/list.jsp?id=38617
Classic Lite 200 + Classic 200 + Westech Combi 3000 + 12x240Wp + 12x255Wp + 10kWh LFP
http://a68k.de:81/Solar/Monitor_LC2.php