robot_zombie
New Member
- Joined
- Sep 22, 2022
- Messages
- 76
I recently setup a victron system (MP2 5kva, cerbo, 150/45 and 250/100 MPPTs) with a DIY battery (16x EVE280V3) and new JK inverter 200A BMS (no smartshunt, JK calling the shots over CAN...). Anyway, its all working pretty well aside from a few niggles... (the JK is running the latest firmware as of a month ago or so, 15.something I think), wondering if anyone else has ran into these issues with the new inverter BMS...
1) the battery capacity / consumed / remaining AH doesn't seem to be sent to the cerbo by the JK, is this normal or something is up with my system? (NaN displayed as time remaining, no capacity info in the cerbo)
2) my RCV is 3.45V, 100% soc 3.449 iirc, but sometimes if the soc is >85% or so and a big charge comes in (4+kw) from a brief burst of sun some cells momentarily jump up to 3.45V, the SOC jumps from 85% eg. straight to 100%. Bit of an issue with their algorithm, I might raise this with JK and see what they say (why doesnt this have a timer or average applied hmmm or use a tail current once ABS pack voltage is reached). I never had any issue with earlier JK BMS soc so this 'feature' is kinda annoying. I expect the correction for this issue barring a fix from JK is a smartshunt and charge control by the cerbo.
3) RFV timer... this system is setup at my parents (off-grid, 3 hours away), it seems the RFV timer is on 1 hour, although I swear I set it to 6 or 8 hrs with 1 hour ABS@3.45. I noticed this was mentioned a few times in the JK firmware changelogs as not being saved correctly, i'll be back onsite next weekend to check this but can anyone confirm the timer is working correctly with their system and which JK firmware they are running?
cheers
1) the battery capacity / consumed / remaining AH doesn't seem to be sent to the cerbo by the JK, is this normal or something is up with my system? (NaN displayed as time remaining, no capacity info in the cerbo)
2) my RCV is 3.45V, 100% soc 3.449 iirc, but sometimes if the soc is >85% or so and a big charge comes in (4+kw) from a brief burst of sun some cells momentarily jump up to 3.45V, the SOC jumps from 85% eg. straight to 100%. Bit of an issue with their algorithm, I might raise this with JK and see what they say (why doesnt this have a timer or average applied hmmm or use a tail current once ABS pack voltage is reached). I never had any issue with earlier JK BMS soc so this 'feature' is kinda annoying. I expect the correction for this issue barring a fix from JK is a smartshunt and charge control by the cerbo.
3) RFV timer... this system is setup at my parents (off-grid, 3 hours away), it seems the RFV timer is on 1 hour, although I swear I set it to 6 or 8 hrs with 1 hour ABS@3.45. I noticed this was mentioned a few times in the JK firmware changelogs as not being saved correctly, i'll be back onsite next weekend to check this but can anyone confirm the timer is working correctly with their system and which JK firmware they are running?
cheers