Hello all, in my 2.6 FL-Omega the battery is shot down after just 2 years. What bothers me is that the battery is a “high-quality” expensive Varta. I measured everything (LIMA, charge controller), so far everything is I.O. My guess: Because my better half and I use the Webasto stand heating extensively, it may be that the frequent use of the same goes on the life of the battery?