I use Axpert Variant as well, but when i set mine at 29.2 the BMS cuts in at 27.5 but it occasionally will spike to 29.1v and then go way down to 26.9v. I am wondering if you are experiencing similar. I feel 29.2 is quite high for lithium, so i have set my bulk to 27.6 and float (even though float is not applicable in lithium) to 27.2v don't know if this will be sufficient for my 200AH LifePo4 battery.