Hi

This is the one I am using

https://thepihut.com/products/2-channel ... spberry-pi

Even thou says raspberry pi, it has a connector for Arduino , or any processor with SPI

Hi, that is good news , I think what happened u had a ground loop between the inverters and that's what blew the can bus ic, , I am using isolated can bus just in case that happened to me. They are more expensive but think worth the extra.
Funny u should suggest about powering directly of the DC of ...

Just a thought, wonder if there is a fault with the backup as this will only run with batteries connected, so it is possible that when it sees a battery it is trying to enable the backup , so not sure if u have but it could be worth turning off the backup supply in the software config and see what ...

Oh dear that's not good, I have the backup plug running some stuff in my garage, like 3d printer, a network switch and a rpi4 that I'm using home assistant on to locally control the inverter. Have they done a software update?

hi,
Its been a while thought u gave up on the project, glad to see u havent and wow that is alot of storage :)
Have u had the batteries and inverter running together yet?
my setup is still working, a few minor changes but so far have produce 1800+ KWH from solar and using octopus agile tariff. I set ...

hi,

I have left inverter running for 24hrs now, just on batteries alone and all is working well including charging at different current rates depending on cell volts. Here is a snippet of what the BMS has received and sent.
Inverter send 13:07:48:053 Data frame Extended frame 00001871 8 02 00 01 00 ...

Hi, have been doing some testing and looking through your canbus data that is included with the spreadsheet, and found that if I send the 1881 & 1882 message the inverter only requests this once and once it has received the data it populates the battery serial number in the menu and then starts ...

Ok thanks, it's actually a stm32f767 using LVGL for the graphics, my own PCB design a 7" touch screen and my code using platform io,

Sorry as previous post would include photos, see on page 1 is what I am talking about

Thanks for this info, I'm sure it will be useful, I hope to include on the software I have written so far in platform io. Here are some pictures of my BMS unit so far, still a working progress.
The cell voltages
IMG_20230303_091006047_HDR.jpg
Cell temperatures
IMG_20230305_125305636.jpg
And the ...

hi Woleg,
Thankyou for your suggestions, in trying to get the BMS working, I did a factory reset the other day and forgot to re-enable the CT clamp, doh.
As far as I can tell it is working, supplying the garage from the batteries so 0w from the grid are now being consumed.
Thank you for taking the ...

My grid load is the garage that the inverter is installed, so has about 400w of florescent tube lighting, a computer and a few other chargers etc, about 700w, the CT clamp is on the incoming mains to the garage, with as per instructions the arrow on the CT clamp pointing towards the grid, so it's ...

Hi,
I seem to have a problem the inverter never feed omre than 37w to the load even thou it is reading 700w, I thought it would try and match the load from the batteries so the grid current is roughly 0?
IMG_20230330_130636467.jpg
Here is the BMS data
IMG_20230330_130954099.jpg
And the results ...

Hi,

Wow that worked , didn't have full time to test but could hear the contactor in the inverter a 60s timer and doing several other tests then powered up, but I forgot my garage is on a 30ma RCD and when the inverter cut in this tripped, but the eps cut in so think it's working IMG_20230328 ...

Ok, there's a few scaling errors in your can bus data and a few other things.

https://i.imgur.com/ytaXUM1.png

0x1873 "Voltage" is scaled wrong. It's decoding at 10x your actual voltage so correct that with * 0.1

Don't send 0x1881 and 0x1882, those are to do with initialisation.

0x1877 is ...

woleg wrote: ↑Tue Mar 28, 2023 4:44 pm Congrats! It’s best to test with EPS enabled, much less fuss. Have you ensured that the FoxESS start/stop option is set to start?

I’ll check that can data out later tonight

Yes the inverter is set to start, and thanks

Oh some pictures And what the inverter is showing, the green light is flashing

hi,

I bit the bullet and have purchased the fox H1 6kw inverter, I have it wired in my garage with the mains and batteries and my BMS controller, also with the current probe on the incoming mains so this thinks the garage is the load just for test purposes only. I have 4 mg zs modules wired to the ...

Thanks for this info, I'm sure it will be useful, I hope to include on the software I have written so far in platform io. Here are some pictures of my BMS unit so far, still a working progress.
The cell voltages
IMG_20230303_091006047_HDR.jpg
Cell temperatures
IMG_20230305_125305636.jpg
And the ...

Here a brief description of can messages. This will help you start the inverter.

Can ID messages are:
Inv. Request
00001871
BMS response
00001872 (Batt_V_max/Batt_V_min/Batt_Chg_max/Batt_chg_min)(V x0.1/V x0.1/A x0.1/A x0.1)
00001873 (batt_cur_V/_/SOC/_)(V x0.1/_/100%/_)
00001874
00001875 (Bat ...

Hi Kevin

I think is a good choice if you can find cheap. I have seen them around £300-£400 (for the 5KW) on eBay.

I have almost crack the can messages.
I move on on esp32 and a small 1" display but I am relocating and between jobs and will be some time until have time to move on with the project ...

Hi, I am in the process of building a very similar setup using the MG ZS batteries, which look exactly the same as yours, so far I have my main processor talking via iso-spi to the individual BMS installed on the top of each pack, I can get all the battery temps, individual cell voltages displaying ...