I built a DIY 16S battery using
Fogstar supplied Envision 280AH Grade B cells
Case was an self build XR-07 with JK-PB2A16S20P BMS and screen
It is now built and is at 69% charge out of the box and all cells are at 3.29V +/- .01V.
SMA SI 5048 EU is loaded with latest SI 6048 US firmware with Lithium support with closed loop Canbus comms. In the SMA list of compatible batteries are a number of Pylontech batteries.
Set JK BMS Canbus to Pylontech LV V1.2
Used the JK docs on Canbus pinout to make a X over cable with SMA RJ45 on one end and JK RJ45 on the other. This did not work, SMA reported no Canbus comms, then found this post
Where it is identified, amongst other issues, that the JK Can_L and Can_H pins are reversed.
As that now matches the SMA pinout I substituted the made up cable with a standard Cat5a ethernet cable.
Set SMA SI5048 to lithium, connected the SI5048 to the JK BMS and started it up, comms were good and SMA shows JK BMS battery SOC and, as it was still connected to the old lead acids, the lead acid bank voltage.
Weather forecast for tomorrow is rain rain and more rain so will take the opportunity to swap the leads from lead acids to the lithium. Will need to calibrate voltage and current on the JK and then will let it run and see how it performs.
The XR-07 case works well, it has the JK BMS ports correctly labelled, however the JK documentation is riddled with errors including ports labelled incorrectly and wrong pinouts.
Fogstar supplied Envision 280AH Grade B cells
Case was an self build XR-07 with JK-PB2A16S20P BMS and screen
It is now built and is at 69% charge out of the box and all cells are at 3.29V +/- .01V.
SMA SI 5048 EU is loaded with latest SI 6048 US firmware with Lithium support with closed loop Canbus comms. In the SMA list of compatible batteries are a number of Pylontech batteries.
Set JK BMS Canbus to Pylontech LV V1.2
Used the JK docs on Canbus pinout to make a X over cable with SMA RJ45 on one end and JK RJ45 on the other. This did not work, SMA reported no Canbus comms, then found this post
Is new JK BMS compatible with this software · Woodstockskipper SIinterJK · Discussion #2
I have the new generation of JK BMS with the 2A active balancer. Specific model is JK-PB2A16S20P, does your solution work with this model. And if you don't know I am happy to try it out. The SI's I...
github.com
Where it is identified, amongst other issues, that the JK Can_L and Can_H pins are reversed.
As that now matches the SMA pinout I substituted the made up cable with a standard Cat5a ethernet cable.
Set SMA SI5048 to lithium, connected the SI5048 to the JK BMS and started it up, comms were good and SMA shows JK BMS battery SOC and, as it was still connected to the old lead acids, the lead acid bank voltage.
Weather forecast for tomorrow is rain rain and more rain so will take the opportunity to swap the leads from lead acids to the lithium. Will need to calibrate voltage and current on the JK and then will let it run and see how it performs.
The XR-07 case works well, it has the JK BMS ports correctly labelled, however the JK documentation is riddled with errors including ports labelled incorrectly and wrong pinouts.