New

Hi MafiaMan New here. Figuratively and literally. I have two CFE 5100s connected to a 5kw Luxpower SNA. The Bats are connected as in your figure 2. (positive of one and negative of the other goes to inverter). I also noticed that the manual actually suggests otherwise, but my installer has these CFE's in his own home and I gathered he has more experience with them. Mine has been going strong without much incident from end March this year. I have only experienced the cycling between 90 and 100 soc, to complain about. It has never done the massive drop. Lowest soc has been 20%. Even with the cycling, PV charges the batteries to 100% and it then starts to discharge to 99% using only battery. It will then proceed to use PV and a small bit of battery, but will not start charging the bats again until they have hit 90% soc. Nervous that I mind end up with the drop as you and others have experienced, but have been lucky thus far. I have the battery app running and this at least gives me a glimpse into the individual cell levels and to check for imbalance. One thing that I note you mentioned is that C rating. Now I noted some spec sheets listing these batteries as 0.6C (therefore max 3000w draw). That is part of the reason I got two as I thought this would "stack" so I could theoretically draw 5kw (max of my inverter). Through careful use though we have not gone over 4kw. But have not had any cut out due to "overdrawing" on the bats. Wonder if I must run a test to see if I can actually get to 5kw draw. I thought I could until I read your posts... (Edit: Both manuals of my bats actually claim 100ah discharge)