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Two JK-BMS to SA, seem conflicting

Robbert

Solar Enthusiast
Joined
Mar 9, 2022
Messages
211
Location
Bonaire (Dutch Caribbean)
Hi all,
Yesterday I added a second bank to my system with a JK BMS.
One bank is running for 60 days now and hooked up to Solar Assistant.

I tried to add the second bms to SA as well. I was able to add that one (used a USB hub), but after connecting it gave a connection error.

Was able to add the new one at the moment the other USB was removed.

The weird thing is that the data in the bms also started to show weird values wrt the cycle count. Almost identical to the 'older' bms.

For now I disconnected the old one and only have the new one connected, since i want to monitor the voltage drift on this one.

Another thing is that the layout of the data in the app is different per BMS. No big deal, but interesting.

Does anyone know how I can have both BMS-es connected to ons SA-pi without having conflicts?

Btw, since the old one is not in the usb hub anymore, the cycle count is fine again.

I added two screenshots
 

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Last edited:
Now it's running 'alone'. One can see the cycle capacity has increased, but cycle count back to normal
 

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Think I figured it out. Two idetical JK-BMS, but both running different firmware. One BMS has the option to select a port (CAN or RS485). Never knew that this option was available in the BMS. Appartently it was on CAN. Will connect it again in the same USB-hub, and check if problem is solved.
The one with the latest firmware is the 'oldest' one.
 

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My 2 JKs 24S20P has an address field with numbering 1, 2 etc. They are brand new, latest version.
Would it help to give each one a unique number? 1 on the first etc.
 
There is only 1 menu in the app...
Under Advanced - Device Addr.:
I have my 1st. as 1 and the second battery as 2.
Btw. not sure if it matters but the text name should not be the same on both.
I called mine BatteryA and the second BatteryB.
 
There is only 1 menu in the app...
Under Advanced - Device Addr.:
I have my 1st. as 1 and the second battery as 2.
Btw. not sure if it matters but the text name should not be the same on both.
I called mine BatteryA and the second BatteryB.
Thank you. Found the option. Will try that Saturday.
 
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