I am aware but it really doesn't matter to me, the LF design and the ability to AC couple to grid tie inverters is much more valuable to me. I have two victron 150/35 mppts in my system, but the bulk of my charge comes from two AC coupled grid tie inverters, one of which cost me $10 at the scrap yard, and the other came in a pair that paid $40 for on FB market place. I could and should be using just the first one, as it could handle both strings just fine, but one of the MC4 inputs is busted and I haven't got around to fixing it yet.