I don’t use my van from week to week so I have put a BM2 on both the starter and leisure batteries. I wanted to monitor the leisure battery when camping and starter battery when parked up so I can better judge when I need to take it for a run.
When the van is running, both batteries are charging well and within normal limits. What surprises me is the voltage and % charge readings on the starter battery when the van is parked up for a few days. After a couple of days I get low batt warnings and when cranking I also always get a low cranking warning.
The state of charge readings and inbuilt app warnings don’t seem to correlate to the tables earlier in this thread. Is this because the BM2 algorithms do not take into account the T6 smart alternator setup?
I am coming to the conclusion that I have to largely ignore the % values and associated warnings and that I should focus on the voltage.
So far I have never had an issue starting the van.
After a long run the starter steadily drops from circa 12.5v to 12.3v over a few days. The monitor considers this as Low.
The cranking voltage is always low at 9.32v.
On the starter battery what voltage can I safely let it fall to? I assume anything above 12.1 ish is ok.
What readings do other get for both cranking and after the van has been parked up for a few days?
I have also discovered that you can change the app alarm parameters. What setting have you got?
When the van is running, both batteries are charging well and within normal limits. What surprises me is the voltage and % charge readings on the starter battery when the van is parked up for a few days. After a couple of days I get low batt warnings and when cranking I also always get a low cranking warning.
The state of charge readings and inbuilt app warnings don’t seem to correlate to the tables earlier in this thread. Is this because the BM2 algorithms do not take into account the T6 smart alternator setup?
I am coming to the conclusion that I have to largely ignore the % values and associated warnings and that I should focus on the voltage.
So far I have never had an issue starting the van.
After a long run the starter steadily drops from circa 12.5v to 12.3v over a few days. The monitor considers this as Low.
The cranking voltage is always low at 9.32v.
On the starter battery what voltage can I safely let it fall to? I assume anything above 12.1 ish is ok.
What readings do other get for both cranking and after the van has been parked up for a few days?
I have also discovered that you can change the app alarm parameters. What setting have you got?